Cassandra

Table of Contents

1. Overview
2. Setup - The basics of getting started with Cassandra
   • What Cassandra affects
   • Beginning with Cassandra
   • Upgrading
3. Usage - Configuration options and additional functionality
   • Create a Cluster in a Single Data Center
   • Create a Cluster in Multiple Data Centers
   • OpsCenter
   • DataStax Enterprise
4. Reference - An under-the-hood peek at what the module is doing and how
   • cassandra
   • cassandra::datastax_agent
   • cassandra::datastax_repo
   • cassandra::firewall_ports
   • cassandra::java
   • cassandra::opscenter
   • cassandra::opscenter::cluster_name
   • cassandra::opscenter::pycrypto
   • cassandra::optutils
5. Limitations - OS compatibility, etc.
6. Contributers

Overview

A Puppet module to install and manage Cassandra, DataStax Agent & OpsCenter

Setup

What Cassandra affects

What the Cassandra class affects

• Installs the Cassandra package (default cassandra22 on Red Hat and cassandra on Debian).
• Configures settings in ${config_path}/cassandra.yaml.
• On CentOS 7 if the init service provider is used, then cassandra is added as a system service.
• Optionally ensures that the Cassandra service is enabled and running.
• On Ubuntu systems, optionally replace /etc/init.d/cassandra with a workaround for CASSANDRA-9822.
• Optionally creates a file /usr/lib/systemd/system/cassandra.service to improve service interaction.

What the cassandra::datastax_agent class affects

• Optionally installs the DataStax agent.
• Optionally sets JAVA_HOME in /etc/default/datastax-agent.

What the cassandra::datastax_agent class affects

• Optionally configures a Yum repository to install the Cassandra packages from (on Red Hat).
• Optionally configures an Apt repository to install the Cassandra packages from (on Ubuntu).

What the cassandra::firewall_ports class affects

• Optionally configures the firewall for the Cassandra related network ports.

What the cassandra::java class affects

• Optionally installs a JRE/JDK package (e.g. java-1.7.0-openjdk) and the Java Native Access (JNA).

What the cassandra::opscenter class affects

• Installs the OpsCenter package.
• Manages the content of the configuration file (/etc/opscenter/opscenterd.conf).
• Manages the opscenterd service.

What the cassandra::opscenter::cluster_name type affects

• An optional type that allows DataStax OpsCenter to connect to a remote key space for metrics storage. These files will be created in /etc/opscenter/clusters. The module also creates this directory if required. This functionality is only valid in DataStax Enterprise.

What the cassandra::opscenter::pycrypto class affects

• On the Red Hat family it installs the pycrypto library and it's pre-requisites (the python-devel and python-pip packages).
• Optionally installs the Extra Packages for Enterprise Linux (EPEL) repository.
• As a workaround for PUP-3829 a symbolic link is created from /usr/bin/pip to /usr/bin/pip-python. Hopefully this can be removed in the not too distant future.

What the cassandra::optutils class affects

• Optionally installs the Cassandra support tools (e.g. cassandra22-tools).

Beginning with Cassandra

A basic example is as follows:

  class { 'cassandra':
    cluster_name    => 'MyCassandraCluster',
    endpoint_snitch => 'GossipingPropertyFileSnitch',
    listen_address  => "${::ipaddress}",
    seeds           => '110.82.155.0,110.82.156.3'
  }

Upgrading

Changes in 1.9.2

Now that Cassandra 3 is available from the DataStax repositories, there is a problem (especially on Debian) with the operating system package manager attempting to install Cassandra 3. This can be mitigated against using something similar to the code in this modules acceptance test. Please note that the default Cassandra package name has now been changed from 'dsc'. See the documentation for cassandra::package_name below for details.

 if $::osfamily == 'RedHat' {
   $version = '2.2.4-1'
 } else {
   $version = '2.2.4'
 }

 class { 'cassandra':
   package_ensure => $version,
 }

Changes in 1.8.0

A somewhat embarrassing correction to the spelling of the cassandra::fail_on_non_suppoted_os to cassandra::fail_on_non_supported_os.

Issues when Upgrading to 1.4.0

Unfortunately both releases 1.3.7 and 1.4.0 have subsequently been found to call a refresh service even when no changes had been made to the underlying configuration. In release 1.8.0 (somewhat belatedly) the service_refresh flag has been introduced to mitigate against similar problems.

Issues When Upgrading to 1.3.7

• Please see the notes for 1.4.0.

Changes in 1.0.0

• cassandra::cassandra_package_ensure has been renamed to cassandra::package_ensure.
• cassandra::cassandra_package_name has been renamed to cassandra::package_name.

Changes in 0.4.0

There is now a cassandra::datastax_agent class, therefore:

• cassandra::datastax_agent_package_ensure has now been replaced with cassandra::datastax_agent::package_ensure.
• cassandra::datastax_agent_service_enable has now been replaced with cassandra::datastax_agent::service_enable.
• cassandra::datastax_agent_service_ensure has now been replaced with cassandra::datastax_agent::service_ensure.
• cassandra::datastax_agent_package_name has now been replaced with cassandra::datastax_agent::package_name.
• cassandra::datastax_agent_service_name has now been replaced with cassandra::datastax_agent::service_name.

Likewise now there is a new class for handling the installation of Java:

• cassandra::java_package_ensure has now been replaced with cassandra::java::ensure.
• cassandra::java_package_name has now been replaced with cassandra::java::package_name.

Also there is now a class for installing the optional utilities:

• cassandra::cassandra_opt_package_ensure has now been replaced with cassandra::optutils:ensure.
• cassandra::cassandra_opt_package_name has now been replaced with cassandra::optutils:package_name.

Changes in 0.3.0

• cassandra_opt_package_ensure changed from 'present' to undef.

• The manage_service option has been replaced with service_enable and service_ensure.

Usage

Create a Cluster in a Single Data Center

In the DataStax documentation Initializing a multiple node cluster (single data center) http://docs.datastax.com/en/cassandra/2.2/cassandra/initialize/initSingleDS.html there is a basic example of a six node cluster with two seeds to be created in a single data center spanning two racks. The nodes in the cluster are:

Node Name	IP Address
node0 (seed 1)	110.82.155.0
node1	110.82.155.1
node2	110.82.155.2
node3 (seed 2)	110.82.156.3
node4	110.82.156.4
node5	110.82.156.5

Each node is configured to use the GossipingPropertyFileSnitch and 256 virtual nodes (vnodes). The name of the cluster is MyCassandraCluster. Also, while building the initial cluster, we are setting the auto_bootstrap to false.

In this initial example, we are going to expand the example by:

• Ensuring that the software is installed via the DataStax Community repository by including cassandra::datastax_repo. This needs to be executed before the Cassandra package is installed.
• That a suitable Java Runtime environment (JRE) is installed with Java Native Access (JNA) by including cassandra::java. This need to be executed before the Cassandra service is started.

node /^node\d+$/ {
  class { 'cassandra::datastax_repo':
    before => Class['cassandra']
  }

  class { 'cassandra::java':
    before => Class['cassandra']
  }

  class { 'cassandra':
    cluster_name     => 'MyCassandraCluster',
    endpoint_snitch  => 'GossipingPropertyFileSnitch',
    listen_interface => "eth1",
    num_tokens       => 256,
    seeds            => '110.82.155.0,110.82.156.3',
    auto_bootstrap   => false
  }
}

The default value for the num_tokens is already 256, but it is included in the example for clarity. Do not forget to either set auto_bootstrap to true or not set the parameter at all after initializing the cluster.

Create a Cluster in Multiple Data Centers

To continue with the examples provided by DataStax, we look at the example for a cluster across multiple data centers http://docs.datastax.com/en/cassandra/2.2/cassandra/initialize/initMultipleDS.html.

Node Name	IP Address	Data Center	Rack
node0 (seed 1)	10.168.66.41	DC1	RAC1
node1	10.176.43.66	DC1	RAC1
node2	10.168.247.41	DC1	RAC1
node3 (seed 2)	10.176.170.59	DC2	RAC1
node4	10.169.61.170	DC2	RAC1
node5	10.169.30.138	DC2	RAC1

For the sake of simplicity, we will confine this example to the nodes:

node /^node[012]$/ {
  class { 'cassandra':
    cluster_name    => 'MyCassandraCluster',
    endpoint_snitch => 'GossipingPropertyFileSnitch',
    listen_address  => "${::ipaddress}",
    num_tokens      => 256,
    seeds           => '10.168.66.41,10.176.170.59',
    dc              => 'DC1',
    auto_bootstrap  => false
  }
}

node /^node[345]$/ {
  class { 'cassandra':
    cluster_name    => 'MyCassandraCluster',
    endpoint_snitch => 'GossipingPropertyFileSnitch',
    listen_address  => "${::ipaddress}",
    num_tokens      => 256,
    seeds           => '10.168.66.41,10.176.170.59',
    dc              => 'DC2',
    auto_bootstrap  => false
  }
}

We don't need to specify the rack name (with the rack parameter) as RAC1 is the default value. Again, do not forget to either set auto_bootstrap to true or not set the parameter at all after initializing the cluster.

OpsCenter

To continue with the original example within a single data center, say we have an instance of OpsCenter running on a node called opscenter which has an IP address of 110.82.157.6. We add the cassandra::datastax_agent to the cassandra node to connect to OpsCenter:

node /^node\d+$/ {
  class { 'cassandra::datastax_repo':
    before => Class['cassandra']
  } ->
  class { 'cassandra::java':
    before => Class['cassandra']
  } ->
  class { 'cassandra':
    cluster_name    => 'MyCassandraCluster',
    endpoint_snitch => 'GossipingPropertyFileSnitch',
    listen_address  => "${::ipaddress}",
    num_tokens      => 256,
    seeds           => '110.82.155.0,110.82.156.3',
    before          => Class['cassandra::datastax_agent']
  } ->
  class { 'cassandra::datastax_agent':
    stomp_interface => '110.82.157.6'
  }
}

node /opscenter/ {
  include '::cassandra::datastax_repo' ->
  include '::cassandra' ->
  include '::cassandra::opscenter'
}

We have also added the cassandra::opscenter class for the opscenter node.

DataStax Enterprise

After configuring the relevant repository, the following snippet works on CentOS 7 to install DSE Cassandra 4.7.0:

class { 'cassandra::datastax_repo':
  descr   => 'DataStax Repo for DataStax Enterprise',
  pkg_url => 'https://username:password@rpm.datastax.com/enterprise',
  before  => Class['cassandra'],
}

class { 'cassandra':
  cluster_name    => 'MyCassandraCluster',
  config_path     => '/etc/dse/cassandra',
  package_ensure  => '4.7.0-1',
  package_name    => 'dse-full',
  service_name    => 'dse',
  service_systemd => true
}

Also with DSE, one can specify a remote keyspace for storing the metrics for a cluster. An example is:

cassandra::opscenter::cluster_name { 'Cluster1':
  cassandra_seed_hosts       => 'host1,host2',
  storage_cassandra_username => 'opsusr',
  storage_cassandra_password => 'opscenter',
  storage_cassandra_api_port => 9160,
  storage_cassandra_cql_port => 9042,
  storage_cassandra_keyspace => 'OpsCenter_Cluster1'
}

Reference

Public Classes

• cassandra
• cassandra::datastax_agent
• cassandra::datastax_repo
• cassandra::firewall_ports
• cassandra::java
• cassandra::opscenter
• cassandra::opscenter::pycrypto
• cassandra::optutils

Public Defined Types

• cassandra::opscenter::cluster_name

Private Defined Types

• cassandra::private::data_directory
• cassandra::private::firewall_ports::rule
• cassandra::private::opscenter::setting

Class: cassandra

A class for installing the Cassandra package and manipulate settings in the configuration file.

Parameters

authenticator

Authentication backend, implementing IAuthenticator; used to identify users. Out of the box, Cassandra provides org.apache.cassandra.auth.{AllowAllAuthenticator, PasswordAuthenticator}.

• AllowAllAuthenticator performs no checks - set it to disable authentication.
• PasswordAuthenticator relies on username/password pairs to authenticate users. It keeps usernames and hashed passwords in system_auth.credentials table. Please increase system_auth keyspace replication factor if you use this authenticator.

Default value: 'AllowAllAuthenticator.

authorizer

Authorization backend, implementing IAuthorizer; used to limit access/provide permissions. Out of the box, Cassandra provides org.apache.cassandra.auth.{AllowAllAuthorizer, CassandraAuthorizer}.

• AllowAllAuthorizer allows any action to any user - set it to disable authorization.
• CassandraAuthorizer stores permissions in system_auth.permissions table. Please increase system_auth keyspace replication factor if you use this authorizer.

Default value: 'AllowAllAuthorizer'

auto_bootstrap

This setting if set to true makes new (non-seed) nodes automatically migrate the right data to themselves. When initializing a fresh cluster without data, set this value to false. If left at the default value of undef then the entry in the configuration file is absent or commented out. If a value is set, then the parameter and variable are placed into the configuration file. Default value: undef

auto_snapshot

Whether or not a snapshot is taken of the data before keyspace truncation or dropping of column families. The STRONGLY advised default of true should be used to provide data safety. If you set this flag to false, you will lose data on truncation or drop. Default value true

batchlog_replay_throttle_in_kb

Maximum throttle in KBs per second, total. This will be reduced proportionally to the number of nodes in the cluster. Default value: '1024'

batch_size_warn_threshold_in_kb

Log WARN on any batch size exceeding this value. 5kb per batch by default. Caution should be taken on increasing the size of this threshold as it can lead to node instability. Default value 5

broadcast_address

Address to broadcast to other Cassandra nodes. Leaving this value as the default will set it to the same value as listen_address. Default value: undef

broadcast_rpc_address

RPC address to broadcast to drivers and other Cassandra nodes. This cannot be set to 0.0.0.0. If left as the default value it will be set to the value of rpc_address. If rpc_address is set to 0.0.0.0, broadcast_rpc_address must be set. Default value: undef

cas_contention_timeout_in_ms

How long a coordinator should continue to retry a CAS operation that contends with other proposals for the same row. Default value: '1000'

cassandra_9822

If set to true, this will apply a patch to the init file for the Cassandra service as a workaround for CASSANDRA-9822. This option is silently ignored on the Red Hat family of operating systems as this bug only affects Ubuntu systems. Default value 'false'

cassandra_yaml_tmpl

The path to the Puppet template for the Cassandra configuration file. This allows the user to supply their own customized template. A Cassandra 1.X compatible template called cassandra1.yaml.erb has been provided by @Spredzy. Default value 'cassandra/cassandra.yaml.erb'

client_encryption_algorithm

Sets client_encryption_options -> algorithm. Default value: undef

Part of the client encryption options. See also client_encryption_enabled, client_encryption_keystore, client_encryption_keystore_password, client_encryption_require_client_auth, client_encryption_truststore, client_encryption_truststore_password, client_encryption_protocol, client_encryption_store_type, client_encryption_cipher_suites.

client_encryption_cipher_suites

Sets client_encryption_options -> cipher_suites. Default value: undef

Part of the client encryption options. See also client_encryption_algorithm, client_encryption_enabled, client_encryption_keystore, client_encryption_keystore_password, client_encryption_require_client_auth, client_encryption_truststore, client_encryption_truststore_password, client_encryption_protocol, client_encryption_store_type.

client_encryption_enabled

Sets client_encryption_options -> enabled. Default value 'false'

Part of the client encryption options. See also client_encryption_algorithm, client_encryption_keystore, client_encryption_keystore_password, client_encryption_require_client_auth, client_encryption_truststore, client_encryption_truststore_password, client_encryption_protocol, client_encryption_store_type, client_encryption_cipher_suites.

client_encryption_keystore

Sets client_encryption_options -> keystore. Default value 'conf/.keystore'

Part of the client encryption options. See also client_encryption_algorithm, client_encryption_enabled, client_encryption_keystore_password, client_encryption_require_client_auth, client_encryption_truststore, client_encryption_truststore_password, client_encryption_protocol, client_encryption_store_type, client_encryption_cipher_suites.

client_encryption_keystore_password

Sets client_encryption_options -> keystore_password. Default value 'cassandra'

Part of the client encryption options. See also client_encryption_algorithm, client_encryption_enabled, client_encryption_keystore, client_encryption_require_client_auth, client_encryption_truststore, client_encryption_truststore_password, client_encryption_protocol, client_encryption_store_type, client_encryption_cipher_suites.

client_encryption_protocol

Sets client_encryption_options -> protocol. Default value: undef

Part of the client encryption options. See also client_encryption_algorithm, client_encryption_enabled, client_encryption_keystore, client_encryption_keystore_password, client_encryption_require_client_auth, client_encryption_truststore, client_encryption_truststore_password, client_encryption_store_type, client_encryption_cipher_suites.

client_encryption_require_client_auth

Sets client_encryption_options -> require_client_auth. Default value: undef

Part of the client encryption options. See also client_encryption_algorithm, client_encryption_enabled, client_encryption_keystore, client_encryption_keystore_password, client_encryption_truststore, client_encryption_truststore_password, client_encryption_protocol, client_encryption_store_type, client_encryption_cipher_suites.

client_encryption_store_type

Sets client_encryption_options -> store_type. Default value: undef

Part of the client encryption options. See also client_encryption_algorithm, client_encryption_enabled, client_encryption_keystore, client_encryption_keystore_password, client_encryption_require_client_auth, client_encryption_truststore, client_encryption_truststore_password, client_encryption_protocol, client_encryption_cipher_suites.

client_encryption_truststore

Sets client_encryption_options -> truststore. Default value: undef

Part of the client encryption options. See also client_encryption_algorithm, client_encryption_enabled, client_encryption_keystore, client_encryption_keystore_password, client_encryption_require_client_auth, client_encryption_truststore_password, client_encryption_protocol, client_encryption_store_type, client_encryption_cipher_suites.

client_encryption_truststore_password

Sets client_encryption_options -> truststore_password. Default value: undef

Part of the client encryption options. See also client_encryption_algorithm, client_encryption_enabled, client_encryption_keystore, client_encryption_keystore_password, client_encryption_require_client_auth, client_encryption_truststore, client_encryption_protocol, client_encryption_store_type, client_encryption_cipher_suites.

cluster_name

The name of the cluster. This is mainly used to prevent machines in one logical cluster from joining another. Default value 'Test Cluster'

column_index_size_in_kb

Granularity of the collation index of rows within a partition. Increase if your rows are large, or if you have a very large number of rows per partition. The competing goals are these:

1. a smaller granularity means more index entries are generated and looking up rows withing the partition by collation column is faster
2. but, Cassandra will keep the collation index in memory for hot rows (as part of the key cache), so a larger granularity means you can cache more hot rows

Default value: '64'

commit_failure_policy

Policy for commit disk failures:

• die: shut down gossip and Thrift and kill the JVM, so the node can be replaced.
• stop: shut down gossip and Thrift, leaving the node effectively dead, but can still be inspected via JMX.
• stop_commit: shutdown the commit log, letting writes collect but continuing to service reads, as in pre-2.0.5 Cassandra
• ignore: ignore fatal errors and let the batches fail

Default value: 'stop'

commitlog_directory

When running on magnetic HDD, this should be a separate spindle than the data directories. Default value '/var/lib/cassandra/commitlog'

See also data_file_directories and saved_caches_directory.

commitlog_directory_mode

The mode for the directory specified in commitlog_directory. Default value '0750'

commitlog_segment_size_in_mb

The size of the individual commitlog file segments. A commitlog segment may be archived, deleted, or recycled once all the data in it (potentially from each columnfamily in the system) has been flushed to sstables.

The default size is 32, which is almost always fine, but if you are archiving commitlog segments (see commitlog_archiving.properties), then you probably want a finer granularity of archiving; 8 or 16 MB is reasonable.

Default value: 32

commitlog_sync

May be either "periodic" or "batch." When in batch mode, Cassandra won't ack writes until the commit log has been fsynced to disk. It will wait up to commitlog_sync_batch_window_in_ms milliseconds for other writes, before performing the sync. Default value: 'periodic'

See also commitlog_sync_batch_window_in_ms and commitlog_sync_period_in_ms.

commitlog_sync_batch_window_in_ms

If commitlog_sync is set to 'batch' then this value should be set. Otherwise it should be set to undef. Default value: undef

commitlog_sync_period_in_ms

If commitlog_sync is set to 'periodic' then this value should be set. Otherwise it should be set to undef. Default value: 10000

commitlog_total_space_in_mb

Total space to use for commitlogs. Since commitlog segments are mmapped, and hence use up address space, the default size is 32 on 32-bit JVMs, and 8192 on 64-bit JVMs (calculated automatically by cassandra if the module setting is left at undef).

If space gets above this value (it will round up to the next nearest segment multiple), Cassandra will flush every dirty CF in the oldest segment and remove it. So a small total commitlog space will tend to cause more flush activity on less-active columnfamilies. Default value: undef

compaction_throughput_mb_per_sec

Throttles compaction to the given total throughput across the entire system. The faster you insert data, the faster you need to compact in order to keep the sstable count down, but in general, setting this to 16 to 32 times the rate you are inserting data is more than sufficient. Setting this to 0 disables throttling. Note that this accounts for all types of compaction, including validation compaction. Default value: '16'

concurrent_counter_writes

For workloads with more data than can fit in memory, Cassandra's bottleneck will be reads that need to fetch data from disk. concurrent_reads should be set to (16 * number_of_drives) in order to allow the operations to enqueue low enough in the stack that the OS and drives can reorder them. Same applies to concurrent_counter_writes, since counter writes read the current values before incrementing and writing them back.

On the other hand, since writes are almost never IO bound, the ideal number of concurrent_writes is dependent on the number of cores in your system; (8 * number_of_cores) is a good rule of thumb. Default value '32'

concurrent_reads

See concurrent_counter_writes. Default value '32'

concurrent_writes

See concurrent_counter_writes. Default value '32'

config_file_mode

The permissions mode of the cassandra configuration file. Default value '0644'

config_path

The path to the cassandra configuration file. If this is undef, it will be changed to /etc/cassandra/default.conf on the Red Hat family of operating systems or /etc/cassandra on Ubuntu. Otherwise the user can specify the path name. Default value undef

concurrent_compactors

Number of simultaneous compactions to allow, NOT including validation "compactions" for anti-entropy repair. Simultaneous compactions can help preserve read performance in a mixed read/write workload, by mitigating the tendency of small sstables to accumulate during a single long running compactions. The default (undef) is usually fine and if you experience problems with compaction running too slowly or too fast, you should look at compaction_throughput_mb_per_sec first.

concurrent_compactors defaults to the smaller of (number of disks, number of cores), with a minimum of 2 and a maximum of 8.

If your data directories are backed by SSD, you should increase this to the number of cores. Default value: undef

counter_cache_save_period

Duration in seconds after which Cassandra should save the counter cache (keys only). Caches are saved to saved_caches_directory as specified in this configuration file. Default value: '7200' (2 hours)

counter_cache_keys_to_save

Number of keys from the counter cache to save. Disabled by default (undef), meaning all keys are going to be saved. Default value: undef

counter_cache_size_in_mb

Maximum size of the counter cache in memory.

Counter cache helps to reduce counter locks' contention for hot counter cells. In case of RF = 1 a counter cache hit will cause Cassandra to skip the read before write entirely. With RF > 1 a counter cache hit will still help to reduce the duration of the lock hold, helping with hot counter cell updates, but will not allow skipping the read entirely. Only the local (clock, count) tuple of a counter cell is kept in memory, not the whole counter, so it's relatively cheap.

NOTE: if you reduce the size, you may not get you hottest keys loaded on startup.

Default value is empty to make it "auto" (min(2.5% of Heap (in MB), 50MB)). Set to 0 to disable counter cache. NOTE: if you perform counter deletes and rely on low gcgs, you should disable the counter cache. Default value: ''

counter_write_request_timeout_in_ms

How long the coordinator should wait for counter writes to complete. Default value: '5000'

cross_node_timeout

Enable operation timeout information exchange between nodes to accurately measure request timeouts. If disabled, replicas will assume that requests were forwarded to them instantly by the coordinator, which means that under overload conditions we will waste that much extra time processing already-timed-out requests.

Warning: before enabling this property make sure that ntp is installed and the times are synchronized between the nodes. Default value: 'false'

data_file_directories

Directories where Cassandra should store data on disk. Cassandra will spread data evenly across them, subject to the granularity of the configured compaction strategy.

Default value '['/var/lib/cassandra/data']'

See also commitlog_directory and saved_caches_directory.

data_file_directories_mode

The mode for the directories specified in data_file_directories. Default value '0750'

dc

Sets the value for dc in config_path/snitch_properties_file see http://docs.datastax.com/en/cassandra/2.1/cassandra/architecture/architectureSnitchesAbout_c.html for more details. Default value 'DC1'

dc_suffix

Sets the value for dc_suffix in config_path/snitch_properties_file see http://docs.datastax.com/en/cassandra/2.1/cassandra/architecture/architectureSnitchesAbout_c.html for more details. If the value is undef then change will be made to the snitch properties file for this setting. Default value undef

disk_failure_policy

Policy for data disk failures:

• die: shut down gossip and Thrift and kill the JVM for any fs errors or single-sstable errors, so the node can be replaced.
• stop_paranoid: shut down gossip and Thrift even for single-sstable errors.
• stop: shut down gossip and Thrift, leaving the node effectively dead, but can still be inspected via JMX.
• best_effort: stop using the failed disk and respond to requests based on remaining available sstables. This means you WILL see obsolete data at CL.ONE!
• ignore: ignore fatal errors and let requests fail, as in pre-1.2 Cassandra

Default value 'stop'

dynamic_snitch_badness_threshold

if set greater than zero and read_repair_chance is < 1.0, this will allow 'pinning' of replicas to hosts in order to increase cache capacity. The badness threshold will control how much worse the pinned host has to be before the dynamic snitch will prefer other replicas over it. This is expressed as a double which represents a percentage. Thus, a value of 0.2 means Cassandra would continue to prefer the static snitch values until the pinned host was 20% worse than the fastest. Default value: '0.1'

dynamic_snitch_reset_interval_in_ms

Controls how often to reset all host scores, allowing a bad host to possibly recover. Default value: '600000'

dynamic_snitch_update_interval_in_ms

Controls how often to perform the more expensive part of host score calculation. Default value: '100'

endpoint_snitch

Set this to a class that implements IEndpointSnitch. The snitch has two functions:

1. It teaches Cassandra enough about your network topology to route requests efficiently.
2. It allows Cassandra to spread replicas around your cluster to avoid correlated failures. It does this by grouping machines into "datacenters" and "racks." Cassandra will do its best not to have more than one replica on the same "rack" (which may not actually be a physical location)

IF YOU CHANGE THE SNITCH AFTER DATA IS INSERTED INTO THE CLUSTER, YOU MUST RUN A FULL REPAIR, SINCE THE SNITCH AFFECTS WHERE REPLICAS ARE PLACED.

Out of the box, Cassandra provides:

• SimpleSnitch: Treats Strategy order as proximity. This can improve cache locality when disabling read repair. Only appropriate for single-datacenter deployments.
• GossipingPropertyFileSnitch: This should be your go-to snitch for production use. The rack and datacenter for the local node are defined in cassandra-rackdc.properties and propagated to other nodes via gossip. If cassandra-topology.properties exists, it is used as a fallback, allowing migration from the PropertyFileSnitch.
• PropertyFileSnitch: Proximity is determined by rack and data center, which are explicitly configured in cassandra-topology.properties.
• Ec2Snitch: Appropriate for EC2 deployments in a single Region. Loads Region and Availability Zone information from the EC2 API. The Region is treated as the datacenter, and the Availability Zone as the rack. Only private IPs are used, so this will not work across multiple Regions.
• Ec2MultiRegionSnitch: Uses public IPs as broadcast_address to allow cross-region connectivity. (Thus, you should set seed addresses to the public IP as well.) You will need to open the storage_port or ssl_storage_port on the public IP firewall. (For intra-Region traffic, Cassandra will switch to the private IP after establishing a connection.)
• RackInferringSnitch: Proximity is determined by rack and data center, which are assumed to correspond to the 3rd and 2nd octet of each node's IP address, respectively. Unless this happens to match your deployment conventions, this is best used as an example of writing a custom Snitch class and is provided in that spirit.

You can use a custom Snitch by setting this to the full class name of the snitch, which will be assumed to be on your classpath. Default value 'SimpleSnitch'

fail_on_non_supported_os

A flag that dictates if the module should fail if it is not RedHat or Debian. If you set this option to false then you must also at least set the config_path parameter as well. Default value 'true'

file_cache_size_in_mb

Total memory to use for sstable-reading buffers. If omitted defaults to the smaller of 1/4 of heap or 512MB. Default value: undef

hinted_handoff_enabled

See http://wiki.apache.org/cassandra/HintedHandoff May either be "true" or "false" to enable globally, or contain a list of data centers to enable per-datacenter (e.g. DC1,DC2). Default value 'true'

hinted_handoff_throttle_in_kb

Maximum throttle in KBs per second, per delivery thread. This will be reduced proportionally to the number of nodes in the cluster. (If there are two nodes in the cluster, each delivery thread will use the maximum rate; if there are three, each will throttle to half of the maximum, since we expect two nodes to be delivering hints simultaneously.) Default value: '1024'

index_summary_capacity_in_mb

A fixed memory pool size in MB for for SSTable index summaries. If left empty, this will default to 5% of the heap size. If the memory usage of all index summaries exceeds this limit, SSTables with low read rates will shrink their index summaries in order to meet this limit. However, this is a best-effort process. In extreme conditions Cassandra may need to use more than this amount of memory. Default value: ''

index_summary_resize_interval_in_minutes

How frequently index summaries should be resampled. This is done periodically to redistribute memory from the fixed-size pool to sstables proportional their recent read rates. Setting to -1 will disable this process, leaving existing index summaries at their current sampling level. Default value: '60'

incremental_backups

Set to true to have Cassandra create a hard link to each sstable flushed or streamed locally in a backups/ subdirectory of the keyspace data. Removing these links is the operator's responsibility. Default value 'false'

initial_token

Allows you to specify tokens manually. While you can use it with vnodes (num_tokens > 1, above) - in which case you should provide a comma-separated list - it's primarily used when adding nodes to legacy clusters that do not have vnodes enabled. Default value: undef

inter_dc_stream_throughput_outbound_megabits_per_sec

Throttles all streaming file transfer between the data centers. This setting allows throttles streaming throughput betweens data centers in addition to throttling all network stream traffic as configured with stream_throughput_outbound_megabits_per_sec. Default value: undef

inter_dc_tcp_nodelay

Enable or disable tcp_nodelay for inter-dc communication. Disabling it will result in larger (but fewer) network packets being sent, reducing overhead from the TCP protocol itself, at the cost of increasing latency if you block for cross-datacenter responses. Default value: 'false'

internode_authenticator

Internode authentication backend, implementing IInternodeAuthenticator; used to allow/disallow connections from peer nodes. Default value: undef

internode_compression

Controls whether traffic between nodes is compressed. Can be:

• all - all traffic is compressed
• dc - traffic between different datacenters is compressed
• none - nothing is compressed.

Default value 'all'

internode_recv_buff_size_in_bytes

Change from the default to set socket buffer size for internode communication Note that when setting this, the buffer size is limited by net.core.wmem_max and when not setting it it is defined by net.ipv4.tcp_wmem

See:

• /proc/sys/net/core/wmem_max
• /proc/sys/net/core/rmem_max
• /proc/sys/net/ipv4/tcp_wmem
• /proc/sys/net/ipv4/tcp_wmem

and: man tcp

Default value: undef

internode_send_buff_size_in_bytes

See internode_recv_buff_size_in_bytes. Default value: undef

key_cache_save_period

Duration in seconds after which Cassandra should save the key cache. Caches are saved to saved_caches_directory as specified in this configuration file.

Saved caches greatly improve cold-start speeds, and is relatively cheap in terms of I/O for the key cache. Row cache saving is much more expensive and has limited use.

Default value: 14400 (4 hours)

key_cache_size_in_mb

Default value is empty to make it "auto" (min(5% of Heap (in MB), 100MB)). Set to 0 to disable key cache. Default value: ''

key_cache_keys_to_save

Number of keys from the key cache to save. Disabled by default, meaning all keys are going to be saved. Default value: undef

listen_address

Address or interface to bind to and tell other Cassandra nodes to connect to. You MUST change this if you want multiple nodes to be able to communicate!

Set listen_address OR listen_interface, not both. Interfaces must correspond to a single address, IP aliasing is not supported.

Leaving it blank leaves it up to InetAddress.getLocalHost(). This will always do the Right Thing if the node is properly configured (hostname, name resolution, etc), and the Right Thing is to use the address associated with the hostname (it might not be).

Setting listen_address to 0.0.0.0 is always wrong.

Default value 'localhost'

listen_interface

Setting this to any value effectively means that listen_address address is ignored. Default value undef

manage_dsc_repo

DEPRECATION WARNING: This option is deprecated. Please include the the ::cassandra::datastax_repo instead.

If set to true then a repository will be setup so that packages can be downloaded from DataStax community. Default value 'false'

max_hints_delivery_threads

Number of threads with which to deliver hints; Consider increasing this number when you have multi-dc deployments, since cross-dc handoff tends to be slower. Default value: '2'

max_hint_window_in_ms

Defines the maximum amount of time a dead host will have hints generated. After it has been dead this long, new hints for it will not be created until it has been seen alive and gone down again. Default value: '10800000'

memory_allocator

The off-heap memory allocator. Affects storage engine metadata as well as caches. Experiments show that JEMAlloc saves some memory than the native GCC allocator (i.e., JEMalloc is more fragmentation-resistant).

Supported values are:

• NativeAllocator
• JEMallocAllocator

If you intend to use JEMallocAllocator you have to install JEMalloc as library and modify cassandra-env.sh as directed in the file.

If left as the default, NativeAllocator is assumed. Default value: undef

memtable_cleanup_threshold

Ratio of occupied non-flushing memtable size to total permitted size that will trigger a flush of the largest memtable. Lager mct will mean larger flushes and hence less compaction, but also less concurrent flush activity which can make it difficult to keep your disks fed under heavy write load.

If not set, memtable_cleanup_threshold defaults to 1 / (memtable_flush_writers + 1) Default value: undef

memtable_flush_writers

This sets the amount of memtable flush writer threads. These will be blocked by disk io, and each one will hold a memtable in memory while blocked.

If omitted is to set to the smaller of (number of disks, number of cores), with a minimum of 2 and a maximum of 8.

If your data directories are backed by SSD, you should increase this to the number of cores. Default value: undef

memtable_heap_space_in_mb

Total permitted memory to use for memtables. Cassandra will stop accepting writes when the limit is exceeded until a flush completes, and will trigger a flush based on memtable_cleanup_threshold If omitted, Cassandra will set both to 1/4 the size of the heap. Default value: undef

memtable_offheap_space_in_mb

If omitted defaults to 1/4 heap. See memtable_heap_space_in_mb. Default value: undef

native_transport_max_concurrent_connections

The maximum number of concurrent client connections. The assumed default is -1 when omitted, which means unlimited. Default value: undef

native_transport_max_concurrent_connections_per_ip

The maximum number of concurrent client connections per source ip. The assumed default is -1 when omitted, which means unlimited. Default value: undef

native_transport_max_frame_size_in_mb

The maximum size of allowed frame. Frame (requests) larger than this will be rejected as invalid. The assumed default is 256MB when omitted. Default value: undef

native_transport_max_threads

The maximum threads for handling requests when the native transport is used. This is similar to rpc_max_threads though the default differs slightly (and there is no native_transport_min_threads, idle threads will always be stopped after 30 seconds). Default value: undef

native_transport_port

Port for the CQL native transport to listen for clients on. For security reasons, you should not expose this port to the internet. Firewall it if needed. Default value '9042'

num_tokens

This defines the number of tokens randomly assigned to this node on the ring The more tokens, relative to other nodes, the larger the proportion of data that this node will store. You probably want all nodes to have the same number of tokens assuming they have equal hardware capability.

If you leave this unspecified, Cassandra will use the default of 1 token for legacy compatibility, and will use the initial_token as described below.

Specifying initial_token will override this setting on the node's initial start, on subsequent starts, this setting will apply even if initial token is set.

If you already have a cluster with 1 token per node, and wish to migrate to multiple tokens per node, see http://wiki.apache.org/cassandra/Operations

Default value '256'

package_ensure

The status of the package specified in package_name. Can be present, latest or a specific version number. Default value 'present'

package_name

The name of the Cassandra package which must be available from a repository. If this is undef, it will be changed to cassandra22 on the Red Hat family of operating systems or cassandra on Debian. Otherwise the user can specify the package name. Default value undef

partitioner

The partitioner is responsible for distributing groups of rows (by partition key) across nodes in the cluster. You should leave this alone for new clusters. The partitioner can NOT be changed without reloading all data, so when upgrading you should set this to the same partitioner you were already using.

Besides Murmur3Partitioner, partitioners included for backwards compatibility include RandomPartitioner, ByteOrderedPartitioner, and OrderPreservingPartitioner.

Default value 'org.apache.cassandra.dht.Murmur3Partitioner'

permissions_update_interval_in_ms

Refresh interval for permissions cache (if enabled). After this interval, cache entries become eligible for refresh. Upon next access, an async reload is scheduled and the old value returned until it completes. If permissions_validity_in_ms is non-zero, then this must be also. If omitted defaults to the same value as permissions_validity_in_ms. Default value: undef

permissions_validity_in_ms

Validity period for permissions cache (fetching permissions can be an expensive operation depending on the authorizer, CassandraAuthorizer is one example). Defaults to 2000, set to 0 to disable. Will be disabled automatically for AllowAllAuthorizer. Default value: '2000'

phi_convict_threshold

Phi value that must be reached for a host to be marked down. Most users should never need to adjust this. Default value: undef

prefer_local

Sets the value for prefer_local in config_path/snitch_properties_file see http://docs.datastax.com/en/cassandra/2.1/cassandra/architecture/architectureSnitchesAbout_c.html for more details. Valid values are true, false or undef. If the value is undef then change will be made to the snitch properties file for this setting. Default value undef

rack

Sets the value for rack in config_path/snitch_properties_file see http://docs.datastax.com/en/cassandra/2.1/cassandra/architecture/architectureSnitchesAbout_c.html for more details. Default value 'RAC1'

range_request_timeout_in_ms

How long the coordinator should wait for seq or index scans to complete. Default value: '10000'

read_request_timeout_in_ms

How long the coordinator should wait for read operations to complete. Default value: '5000'

request_scheduler

Set this to a class that implements RequestScheduler, which will schedule incoming client requests according to the specific policy. This is useful for multi-tenancy with a single Cassandra cluster.

NOTE: This is specifically for requests from the client and does not affect inter node communication.

• org.apache.cassandra.scheduler.NoScheduler - No scheduling takes place
• org.apache.cassandra.scheduler.RoundRobinScheduler - Round robin of client requests to a node with a separate queue for each request_scheduler_id.

The scheduler is further customized by request_scheduler_options:

• NoScheduler - Has no options
• RoundRobin
  • throttle_limit - The throttle_limit is the number of in-flight requests per client. Requests beyond that limit are queued up until running requests can complete. The value of 80 here is twice the number of concurrent_reads + concurrent_writes.
  • default_weight - default_weight is optional and allows for overriding the default which is 1.
  • weights - Weights are optional and will default to 1 or the overridden default_weight. The weight translates into how many requests are handled during each turn of the RoundRobin, based on the scheduler id.

Default value: 'org.apache.cassandra.scheduler.NoScheduler'

request_scheduler_options_default_weight

See request_scheduler. Default value: undef

request_scheduler_options_throttle_limit

See request_scheduler. Default value: undef

request_timeout_in_ms

How long the coordinator should wait for read operations to complete. Default value: '10000'

row_cache_keys_to_save

Number of keys from the row cache to save. Disabled by default, meaning all keys are going to be saved. Default value: undef

row_cache_save_period

Duration in seconds after which Cassandra should save the row cache. Caches are saved to saved_caches_directory as specified in this configuration file.

Saved caches greatly improve cold-start speeds, and is relatively cheap in terms of I/O for the key cache. Row cache saving is much more expensive and has limited use.

Default value: '0' (disable saving the row cache)

row_cache_size_in_mb

Maximum size of the row cache in memory.

NOTE: if you reduce the size, you may not get you hottest keys loaded on startup.

Default value: '0' (disable row caching)

rpc_address

The address bind the Thrift RPC service and native transport server to.

Set rpc_address OR rpc_interface, not both. Interfaces must correspond to a single address, IP aliasing is not supported.

Leaving rpc_address blank has the same effect as on listen_address (i.e. it will be based on the configured hostname of the node).

Note that unlike listen_address, you can specify 0.0.0.0, but you must also set broadcast_rpc_address to a value other than 0.0.0.0.

For security reasons, you should not expose this port to the internet. Firewall it if needed.

Default value 'localhost'

rpc_interface

Setting this to any value effectively means that rpc_address address is ignored. Default value: undef

rpc_max_threads

Set rpc_min|max_thread to set request pool size limits.

Regardless of your choice of RPC server (see rpc_server_type), the number of maximum requests in the RPC thread pool dictates how many concurrent requests are possible (but if you are using the sync RPC server, it also dictates the number of clients that can be connected at all).

The default is unlimited and thus provides no protection against clients overwhelming the server. You are encouraged to set a maximum that makes sense for you in production, but do keep in mind that rpc_max_threads represents the maximum number of client requests this server may execute concurrently. Default value: undef

rpc_min_threads

See rpc_max_threads. Default value: undef

rpc_port

Port for Thrift to listen for clients on. Default value '9160'

rpc_recv_buff_size_in_bytes

Change from undef to set socket buffer sizes on rpc connections. Default value: undef

rpc_send_buff_size_in_bytes

Change from undef to set socket buffer sizes on rpc connections. Default value: undef

rpc_server_type

Cassandra provides two out-of-the-box options for the RPC Server:

• sync -> One thread per thrift connection. For a very large number of clients, memory will be your limiting factor. On a 64 bit JVM, 180KB is the minimum stack size per thread, and that will correspond to your use of virtual memory (but physical memory may be limited depending on use of stack space).

• hsha -> Stands for "half synchronous, half asynchronous." All thrift clients are handled asynchronously using a small number of threads that does not vary with the amount of thrift clients (and thus scales well to many clients). The rpc requests are still synchronous (one thread per active request). If hsha is selected then it is essential that rpc_max_threads is changed from the default value of unlimited.

The default is sync because on Windows hsha is about 30% slower. On Linux, sync/hsha performance is about the same, with hsha of course using less memory.

Alternatively, provide your own RPC server by providing the fully-qualified class name of an o.a.c.t.TServerFactory that can create an instance of it.

Default value 'sync'

saved_caches_directory

Default value '/var/lib/cassandra/saved_caches'

See also commitlog_directory and data_file_directories.

saved_caches_directory_mode

The mode for the directory specified in saved_caches_directory. Default value '0750'

seeds

The field being set is seed_provider -> parameters -> seeds.

Addresses of hosts that are deemed contact points. Cassandra nodes use this list of hosts to find each other and learn the topology of the ring. You must change this if you are running multiple nodes!

seeds is actually a comma-delimited list of addresses. Ex: "ip1,ip2,ip3"

See also seed_provider_class_name.

Default value '127.0.0.1'

seed_provider_class_name

The field being set is seed_provider -> class_name.

Any class that implements the SeedProvider interface and has a constructor that takes a Map(String, String) of parameters will do.

See also seeds.

Default value 'org.apache.cassandra.locator.SimpleSeedProvider'

server_encryption_algorithm

The field being set is server_encryption_options -> algorithm.

This is part of the server encryption options. See also: server_encryption_cipher_suites, server_encryption_internode, server_encryption_keystore, server_encryption_keystore_password, server_encryption_protocol, server_encryption_require_client_auth, server_encryption_store_type, server_encryption_truststore, server_encryption_truststore_password.

Default value: undef

server_encryption_cipher_suites

The field being set is server_encryption_options -> cipher_suites.

This is part of the server encryption options. See also: server_encryption_algorithm, server_encryption_cipher_suites, server_encryption_internode, server_encryption_keystore, server_encryption_keystore_password, server_encryption_protocol, server_encryption_require_client_auth, server_encryption_store_type, server_encryption_truststore, server_encryption_truststore_password.

Default value: undef

server_encryption_internode

The field being set is server_encryption_options -> internode_encryption.

This is part of the server encryption options. See also: server_encryption_algorithm, server_encryption_cipher_suites, server_encryption_keystore, server_encryption_keystore_password, server_encryption_protocol, server_encryption_require_client_auth, server_encryption_store_type, server_encryption_truststore, server_encryption_truststore_password.

Default value 'none'

server_encryption_keystore

The field being set is server_encryption_options -> keystore.

This is part of the server encryption options. See also: server_encryption_algorithm, server_encryption_cipher_suites, server_encryption_internode, server_encryption_keystore_password, server_encryption_protocol, server_encryption_require_client_auth, server_encryption_store_type, server_encryption_truststore, server_encryption_truststore_password.

Default value 'conf/.keystore'

server_encryption_keystore_password

The field being set is server_encryption_options -> keystore_password.

This is part of the server encryption options. See also: server_encryption_algorithm, server_encryption_cipher_suites, server_encryption_internode, server_encryption_keystore, server_encryption_protocol, server_encryption_require_client_auth, server_encryption_store_type, server_encryption_truststore, server_encryption_truststore_password.

Default value 'cassandra'

server_encryption_protocol

The field being set is server_encryption_options -> protocol.

This is part of the server encryption options. See also: server_encryption_algorithm, server_encryption_cipher_suites, server_encryption_internode, server_encryption_keystore, server_encryption_keystore_password, server_encryption_require_client_auth, server_encryption_store_type, server_encryption_truststore, server_encryption_truststore_password.

Default value: undef

server_encryption_require_client_auth

The field being set is server_encryption_options -> require_client_auth.

This is part of the server encryption options. See also: server_encryption_algorithm, server_encryption_cipher_suites, server_encryption_internode, server_encryption_keystore, server_encryption_keystore_password, server_encryption_protocol, server_encryption_store_type, server_encryption_truststore, server_encryption_truststore_password.

Default value: undef

server_encryption_store_type

The field being set is server_encryption_options -> store_type.

This is part of the server encryption options. See also: server_encryption_algorithm, server_encryption_cipher_suites, server_encryption_internode, server_encryption_keystore, server_encryption_keystore_password, server_encryption_protocol, server_encryption_require_client_auth, server_encryption_truststore, server_encryption_truststore_password.

Default value: undef

server_encryption_truststore

The field being set is server_encryption_options -> truststore.

This is part of the server encryption options. See also: server_encryption_algorithm, server_encryption_cipher_suites, server_encryption_internode, server_encryption_keystore, server_encryption_keystore_password, server_encryption_protocol, server_encryption_require_client_auth, server_encryption_store_type, server_encryption_truststore_password.

Default value 'conf/.truststore'

server_encryption_truststore_password

This is passed to the cassandra.yaml file. The field being set is server_encryption_options -> truststore_password.

This is part of the server encryption options. See also: server_encryption_algorithm, server_encryption_cipher_suites, server_encryption_internode, server_encryption_keystore, server_encryption_keystore_password, server_encryption_protocol, server_encryption_require_client_auth, server_encryption_store_type, server_encryption_truststore.

Default value 'cassandra'

service_enable

Enable the Cassandra service to start at boot time. Valid values are true or false. Default value 'true'

service_ensure

Ensure the Cassandra service is running. Valid values are running or stopped. Default value 'running'

service_name

The name of the service that runs the Cassandra software. Default value 'cassandra'

service_provider

The name of the provider that runs the service. If left as undef then the OS family specific default will be used, otherwise the specified value will be used instead. Default value undef

service_refresh

If set to true, changes to the Cassandra config file or the data directories will ensure that Cassandra service is refreshed after the changes. Setting this flag to false will disable this behaviour, therefore allowing the changes to be made but allow the user to control when the service is restarted. Default value true

service_systemd

If set to true then a systemd service file called /usr/lib/systemd/system/${service_name}.service will be added to the node with basic settings to ensure that the Cassandra service interacts with systemd better. Default value false

snapshot_before_compaction

Whether or not to take a snapshot before each compaction. Be careful using this option, since Cassandra won't clean up the snapshots for you. Mostly useful if you're paranoid when there is a data format change. Default value 'false'

snitch_properties_file

The name of the snitch properties file. The full path name would be config_path/snitch_properties_file. Default value 'cassandra-rackdc.properties'

ssl_storage_port

SSL port, for encrypted communication. Unused unless enabled in encryption_options For security reasons, you should not expose this port to the internet. Firewall it if needed. Default value '7001'

sstable_preemptive_open_interval_in_mb

When compacting, the replacement sstable(s) can be opened before they are completely written, and used in place of the prior sstables for any range that has been written. This helps to smoothly transfer reads between the sstables, reducing page cache churn and keeping hot rows hot Default value: '50'

start_native_transport

Whether to start the native transport server. Please note that the address on which the native transport is bound is the same as the rpc_address. The port however is different and specified below. Default value 'true'

start_rpc

Whether to start the thrift rpc server. Default value 'true'

stream_throughput_outbound_megabits_per_sec

Throttles all outbound streaming file transfers on a node to the specified throughput. Cassandra does mostly sequential I/O when streaming data during bootstrap or repair, which can lead to saturating the network connection and degrading client (RPC) performance. Default value: undef

storage_port

TCP port, for commands and data. For security reasons, you should not expose this port to the internet. Firewall it if needed. Default value '7000'

streaming_socket_timeout_in_ms

Enable socket timeout for streaming operation. When a timeout occurs during streaming, streaming is retried from the start of the current file. This can involve re-streaming an important amount of data, so you should avoid setting the value too low. If omitted value is 0 is assumed, which never timeout streams. Default value: undef

tombstone_failure_threshold

When executing a scan, within or across a partition, we need to keep the tombstones seen in memory so we can return them to the coordinator, which will use them to make sure other replicas also know about the deleted rows. With workloads that generate a lot of tombstones, this can cause performance problems and even exaust the server heap. (http://www.datastax.com/dev/blog/cassandra-anti-patterns-queues-and-queue-like-datasets) Adjust the thresholds here if you understand the dangers and want to scan more tombstones anyway. These thresholds may also be adjusted at runtime using the StorageService mbean.

See also tombstone_warn_threshold.

Default value: '100000'

tombstone_warn_threshold

See tombstone_failure_threshold.

Default value: '1000'

trickle_fsync

Whether to, when doing sequential writing, fsync() at intervals in order to force the operating system to flush the dirty buffers. Enable this to avoid sudden dirty buffer flushing from impacting read latencies. Almost always a good idea on SSDs; not necessarily on platters.

See also trickle_fsync_interval_in_kb

Default value: 'false'

trickle_fsync_interval_in_kb

See trickle_fsync. Default value: '10240'

truncate_request_timeout_in_ms

How long the coordinator should wait for truncates to complete (This can be much longer, because unless auto_snapshot is disabled we need to flush first so we can snapshot before removing the data.) Default value: '60000'

write_request_timeout_in_ms

How long the coordinator should wait for writes to complete. Default value: '2000'

Class: cassandra::datastax_agent

A class for installing the DataStax Agent and to point it at an OpsCenter instance.

Parameters

agent_alias

If the value is changed from the default of undef then this is what is set as the alias setting in /var/lib/datastax-agent/conf/address.yaml which is the name the agent announces itself to OpsCenter as. Default value undef

defaults_file

The full path name to the file where java_home is set. Default value '/etc/default/datastax-agent'

java_home

If the value of this variable is left as undef, no action is taken. Otherwise the value is set as JAVA_HOME in defaults_file. Default value undef

package_ensure

Is passed to the package reference. Valid values are present or a version number. Default value 'present'

package_name

Is passed to the package reference. Default value 'datastax-agent'

service_ensure

Is passed to the service reference. Default value 'running'

service_enable

Is passed to the service reference. Default value 'true'

service_name

Is passed to the service reference. Default value 'datastax-agent'

service_provider

The name of the provider that runs the service. If left as undef then the OS family specific default will be used, otherwise the specified value will be used instead. Default value undef

stomp_interface

If the value is changed from the default of undef then this is what is set as the stomp_interface setting in /var/lib/datastax-agent/conf/address.yaml which connects the agent to an OpsCenter instance. Default value undef

local_interface

If the value is changed from the default of undef then this is what is set as the local_interface setting in /var/lib/datastax-agent/conf/address.yaml which is the address there the local cassandra will be contacted. Default value undef

Class: cassandra::datastax_repo

An optional class that will allow a suitable repository to be configured from which packages for DataStax Community can be downloaded. Changing the defaults will allow any Debian Apt or Red Hat Yum repository to be configured.

Parameters

descr

On the Red Hat family, this is passed as the descr parameter to a yumrepo resource. On the Debian family, it is passed as the comment parameter to an apt::source resource. Default value 'DataStax Repo for Apache Cassandra'

key_id

On the Debian family, this is passed as the id parameter to an apt::key resource. On the Red Hat family, it is ignored. Default value '7E41C00F85BFC1706C4FFFB3350200F2B999A372'

key_url

On the Debian family, this is passed as the source parameter to an apt::key resource. On the Red Hat family, it is ignored. Default value 'http://debian.datastax.com/debian/repo_key'

pkg_url

If left as the default, this will set the baseurl to 'http://rpm.datastax.com/community' on a yumrepo resource on the Red Hat family. On the Debian family, leaving this as the default will set the location parameter on an apt::source to 'http://debian.datastax.com/community'. Default value undef

release

On the Debian family, this is passed as the release parameter to an apt::source resource. On the Red Hat family, it is ignored. Default value 'stable'

Class: cassandra::firewall_ports

An optional class to configure incoming network ports on the host that are relevant to the Cassandra installation. If firewalls are being managed already, simply do not include this module in your manifest.

IMPORTANT: The full list of which ports should be configured is assessed at evaluation time of the configuration. Therefore if one is to use this class, it must be the final cassandra class included in the manifest.

Parameters

client_ports

Only has any effect if the cassandra class is defined on the node.

Allow these TCP ports to be opened for traffic coming from the client subnets. Default value '[9042, 9160]'

client_subnets

Only has any effect if the cassandra class is defined on the node.

An array of the list of subnets that are to allowed connection to cassandra::native_transport_port and cassandra::rpc_port. Default value '['0.0.0.0/0']'

inter_node_ports

Only has any effect if the cassandra class is defined on the node.

Allow these TCP ports to be opened for traffic between the Cassandra nodes. Default value '[7000, 7001, 7199]'

inter_node_subnets

Only has any effect if the cassandra class is defined on the node.

An array of the list of subnets that are to allowed connection to cassandra::storage_port, cassandra::ssl_storage_port and port 7199 for cassandra JMX monitoring. Default value '['0.0.0.0/0']'

inter_node_ports

Allow these TCP ports to be opened for traffic coming from OpsCenter subnets. Default value '[7000, 7001, 7199]'

public_ports

Allow these TCP ports to be opened for traffic coming from public subnets the port specified in $ssh_port will be appended to this list. Default value '[8888]'

public_subnets

An array of the list of subnets that are to allowed connection to cassandra::firewall_ports::ssh_port and if cassandra::opscenter has been included, both cassandra::opscenter::webserver_port and cassandra::opscenter::webserver_ssl_port. Default value '['0.0.0.0/0']'

ssh_port

Which port does SSH operate on. Default value '22'

opscenter_ports

Only has any effect if the cassandra::datastax_agent or cassandra::opscenter classes are defined.

Allow these TCP ports to be opened for traffic coming to or from OpsCenter appended to this list. Default value '[61620, 61621]'

opscenter_subnets

A list of subnets that are to be allowed connection to port 61620 for nodes built with cassandra::opscenter and 61621 for nodes built with cassandra::datastax_agent. Default value '['0.0.0.0/0']'

Class: cassandra::java

A class to install an appropriate Java package.

Parameters

ensure

Is passed to the package reference for the JRE/JDK package. Valid values are present or a version number. Default value 'present'

jna_ensure

Is passed to the package reference for the JNA package. Valid values are present or a version number. Default value 'present'

jna_package_name

If the default value of undef is left as it is, then a package called jna or libjna-java will be installed on a Red Hat family or Debian system respectively. Alternatively, one can specify a package that is available in a package repository to the node. Default value undef

package_name

If the default value of undef is left as it is, then a package called java-1.8.0-openjdk-headless or openjdk-7-jre-headless will be installed on a Red Hat family or Debian system respectively. Alternatively, one can specify a package that is available in a package repository to the node. Default value undef

Class: cassandra::opscenter

This class installs and manages the DataStax OpsCenter. Leaving the defaults as they are will provide a running OpsCenter without any authentication on port 8888.

Parameters

agents_agent_certfile

This sets the agent_certfile setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_agent_keyfile

This sets the agent_keyfile setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_agent_keyfile_raw

This sets the agent_keyfile_raw setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_config_sleep

This sets the config_sleep setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_fingerprint_throttle

This sets the fingerprint_throttle setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_incoming_interface

This sets the incoming_interface setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_incoming_port

This sets the incoming_port setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_install_throttle

This sets the install_throttle setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_not_seen_threshold

This sets the not_seen_threshold setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_path_to_deb

This sets the path_to_deb setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_path_to_find_java

This sets the path_to_find_java setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_path_to_installscript

This sets the path_to_installscript setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_path_to_rpm

This sets the path_to_rpm setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_path_to_sudowrap

This sets the path_to_sudowrap setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_reported_interface

This sets the reported_interface setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_runs_sudo

This sets the runs_sudo setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_scp_executable

This sets the scp_executable setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_ssh_executable

This sets the ssh_executable setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_ssh_keygen_executable

This sets the ssh_keygen_executable setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_ssh_keyscan_executable

This sets the ssh_keyscan_executable setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_ssh_port

This sets the ssh_port setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_ssh_sys_known_hosts_file

This sets the ssh_sys_known_hosts_file setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_ssh_user_known_hosts_file

This sets the ssh_user_known_hosts_file setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_ssl_certfile

This sets the ssl_certfile setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_ssl_keyfile

This sets the ssl_keyfile setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_tmp_dir

This sets the tmp_dir setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

agents_use_ssl

This sets the use_ssl setting in the agents section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

authentication_audit_auth

This sets the audit_auth setting in the authentication section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

authentication_audit_pattern

This sets the audit_pattern setting in the authentication section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

authentication_method

This sets the authentication_method setting in the authentication section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

authentication_enabled

This sets the enabled setting in the authentication section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value 'False'

authentication_passwd_db

This sets the passwd_db setting in the authentication section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

authentication_timeout

This sets the timeout setting in the authentication section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

cloud_accepted_certs

This sets the accepted_certs setting in the cloud section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

clusters_add_cluster_timeout

This sets the add_cluster_timeout setting in the clusters section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

clusters_startup_sleep

This sets the startup_sleep setting in the clusters section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

config_file

The full path to the OpsCenter configuration file. Default value '/etc/opscenter/opscenterd.conf'

definitions_auto_update

This sets the auto_update setting in the definitions section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

definitions_definitions_dir

This sets the definitions_dir setting in the definitions section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

definitions_download_filename

This sets the download_filename setting in the definitions section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

definitions_download_host

This sets the download_host setting in the definitions section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

definitions_download_port

This sets the download_port setting in the definitions section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

definitions_hash_filename

This sets the hash_filename setting in the definitions section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

definitions_sleep

This sets the sleep setting in the definitions section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

definitions_ssl_certfile

This sets the ssl_certfile setting in the definitions section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

definitions_use_ssl

This sets the use_ssl setting in the definitions section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ensure

This is passed to the package reference for opscenter. Valid values are present or a version number. Default value 'present'

failover_configuration_directory

This sets the failover_configuration_directory setting in the failover section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

failover_heartbeat_fail_window

This sets the heartbeat_fail_window setting in the failover section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

failover_heartbeat_period

This sets the heartbeat_period setting in the failover section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

failover_heartbeat_reply_period

This sets the heartbeat_reply_period setting in the failover section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

hadoop_base_job_tracker_proxy_port

This sets the base_job_tracker_proxy_port setting in the hadoop section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_admin_group_name

This sets the admin_group_name setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_connection_timeout

This sets the connection_timeout setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_debug_ssl

This sets the debug_ssl setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_group_name_attribute

This sets the group_name_attribute setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_group_search_base

This sets the group_search_base setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_group_search_filter

This sets the group_search_filter setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_group_search_type

This sets the group_search_type setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_ldap_security

This sets the ldap_security setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_opt_referrals

This sets the opt_referrals setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_protocol_version

This sets the protocol_version setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_search_dn

This sets the search_dn setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_search_password

This sets the search_password setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_server_host

This sets the server_host setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_server_port

This sets the server_port setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_ssl_cacert

This sets the ssl_cacert setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_ssl_cert

This sets the ssl_cert setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_ssl_key

This sets the ssl_key setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_tls_demand

This sets the tls_demand setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_tls_reqcert

This sets the tls_reqcert setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_uri_scheme

This sets the uri_scheme setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_user_memberof_attribute

This sets the user_memberof_attribute setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_user_search_base

This sets the user_search_base setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

ldap_user_search_filter

This sets the user_search_filter setting in the ldap section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

logging_level

This sets the level setting in the logging section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

logging_log_length

This sets the log_length setting in the logging section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

logging_log_path

This sets the log_path setting in the logging section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

logging_max_rotate

This sets the max_rotate setting in the logging section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

logging_resource_usage_interval

This sets the resource_usage_interval setting in the logging section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

package_name

The name of the OpsCenter package. Default value 'opscenter'

provisioning_agent_install_timeout

This sets the agent_install_timeout setting in the provisioning section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

provisioning_keyspace_timeout

This sets the keyspace_timeout setting in the provisioning section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

provisioning_private_key_dir

This sets the private_key_dir setting in the provisioning section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

repair_service_alert_on_repair_failure

This sets the alert_on_repair_failure setting in the repair_service section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

repair_service_cluster_stabilization_period

This sets the cluster_stabilization_period setting in the repair_service section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef

repair_service_error_logging_window

This sets the error_logging_window setting in the repair_service section of the OpsCenter configuration file. See http://docs.datastax.com/en/opscenter/5.2/opsc/configure/opscConfigProps_r.html for more details. A value of undef will ensure the setting is not present in the file. Default value undef