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# Cassandra storage config YAML
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# NOTE:
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# See http://wiki.apache.org/cassandra/StorageConfiguration for
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# full explanations of configuration directives
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# /NOTE
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# The name of the cluster. This is mainly used to prevent machines in
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# one logical cluster from joining another.
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cluster_name: 'Test Cluster'
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# This defines the number of tokens randomly assigned to this node on the ring
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# The more tokens, relative to other nodes, the larger the proportion of data
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# that this node will store. You probably want all nodes to have the same number
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# of tokens assuming they have equal hardware capability.
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#
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# If you leave this unspecified, Cassandra will use the default of 1 token for legacy compatibility,
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# and will use the initial_token as described below.
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#
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# Specifying initial_token will override this setting.
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#
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# If you already have a cluster with 1 token per node, and wish to migrate to
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# multiple tokens per node, see http://wiki.apache.org/cassandra/Operations
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num_tokens: 256
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# initial_token allows you to specify tokens manually. While you can use # it with
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# vnodes (num_tokens > 1, above) -- in which case you should provide a
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# comma-separated list -- it's primarily used when adding nodes # to legacy clusters
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# that do not have vnodes enabled.
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# initial_token:
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# See http://wiki.apache.org/cassandra/HintedHandoff
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hinted_handoff_enabled: true
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# this defines the maximum amount of time a dead host will have hints
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# generated. After it has been dead this long, new hints for it will not be
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# created until it has been seen alive and gone down again.
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max_hint_window_in_ms: 10800000 # 3 hours
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# Maximum throttle in KBs per second, per delivery thread. This will be
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# reduced proportionally to the number of nodes in the cluster. (If there
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# are two nodes in the cluster, each delivery thread will use the maximum
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# rate; if there are three, each will throttle to half of the maximum,
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# since we expect two nodes to be delivering hints simultaneously.)
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hinted_handoff_throttle_in_kb: 1024
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# Number of threads with which to deliver hints;
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# Consider increasing this number when you have multi-dc deployments, since
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# cross-dc handoff tends to be slower
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max_hints_delivery_threads: 2
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# The following setting populates the page cache on memtable flush and compaction
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# WARNING: Enable this setting only when the whole node's data fits in memory.
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# Defaults to: false
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# populate_io_cache_on_flush: false
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# Authentication backend, implementing IAuthenticator; used to identify users
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# Out of the box, Cassandra provides org.apache.cassandra.auth.{AllowAllAuthenticator,
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# PasswordAuthenticator}.
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#
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# - AllowAllAuthenticator performs no checks - set it to disable authentication.
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# - PasswordAuthenticator relies on username/password pairs to authenticate
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# users. It keeps usernames and hashed passwords in system_auth.credentials table.
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# Please increase system_auth keyspace replication factor if you use this authenticator.
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authenticator: AllowAllAuthenticator
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# Authorization backend, implementing IAuthorizer; used to limit access/provide permissions
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# Out of the box, Cassandra provides org.apache.cassandra.auth.{AllowAllAuthorizer,
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# CassandraAuthorizer}.
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#
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# - AllowAllAuthorizer allows any action to any user - set it to disable authorization.
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# - CassandraAuthorizer stores permissions in system_auth.permissions table. Please
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# increase system_auth keyspace replication factor if you use this authorizer.
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authorizer: AllowAllAuthorizer
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# Validity period for permissions cache (fetching permissions can be an
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# expensive operation depending on the authorizer, CassandraAuthorizer is
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# one example). Defaults to 2000, set to 0 to disable.
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# Will be disabled automatically for AllowAllAuthorizer.
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permissions_validity_in_ms: 2000
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# The partitioner is responsible for distributing rows (by key) across
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# nodes in the cluster. Any IPartitioner may be used, including your
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# own as long as it is on the classpath. Out of the box, Cassandra
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# provides org.apache.cassandra.dht.{Murmur3Partitioner, RandomPartitioner
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# ByteOrderedPartitioner, OrderPreservingPartitioner (deprecated)}.
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#
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# - RandomPartitioner distributes rows across the cluster evenly by md5.
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# This is the default prior to 1.2 and is retained for compatibility.
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# - Murmur3Partitioner is similar to RandomPartioner but uses Murmur3_128
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# Hash Function instead of md5. When in doubt, this is the best option.
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# - ByteOrderedPartitioner orders rows lexically by key bytes. BOP allows
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# scanning rows in key order, but the ordering can generate hot spots
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# for sequential insertion workloads.
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# - OrderPreservingPartitioner is an obsolete form of BOP, that stores
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# - keys in a less-efficient format and only works with keys that are
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# UTF8-encoded Strings.
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# - CollatingOPP collates according to EN,US rules rather than lexical byte
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# ordering. Use this as an example if you need custom collation.
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#
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# See http://wiki.apache.org/cassandra/Operations for more on
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# partitioners and token selection.
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partitioner: org.apache.cassandra.dht.Murmur3Partitioner
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# Directories where Cassandra should store data on disk. Cassandra
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# will spread data evenly across them, subject to the granularity of
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# the configured compaction strategy.
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data_file_directories:
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- .cassandra/var/lib/cassandra/data
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# commit log
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commitlog_directory: .cassandra/var/lib/cassandra/commitlog
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# policy for data disk failures:
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# stop: shut down gossip and Thrift, leaving the node effectively dead, but
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# can still be inspected via JMX.
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# best_effort: stop using the failed disk and respond to requests based on
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# remaining available sstables. This means you WILL see obsolete
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# data at CL.ONE!
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# ignore: ignore fatal errors and let requests fail, as in pre-1.2 Cassandra
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disk_failure_policy: stop
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# Maximum size of the key cache in memory.
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#
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# Each key cache hit saves 1 seek and each row cache hit saves 2 seeks at the
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# minimum, sometimes more. The key cache is fairly tiny for the amount of
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# time it saves, so it's worthwhile to use it at large numbers.
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# The row cache saves even more time, but must contain the entire row,
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# so it is extremely space-intensive. It's best to only use the
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# row cache if you have hot rows or static rows.
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#
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# NOTE: if you reduce the size, you may not get you hottest keys loaded on startup.
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#
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# Default value is empty to make it "auto" (min(5% of Heap (in MB), 100MB)). Set to 0 to disable key cache.
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key_cache_size_in_mb:
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# Duration in seconds after which Cassandra should
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# save the key cache. Caches are saved to saved_caches_directory as
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# specified in this configuration file.
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#
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# Saved caches greatly improve cold-start speeds, and is relatively cheap in
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# terms of I/O for the key cache. Row cache saving is much more expensive and
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# has limited use.
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#
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# Default is 14400 or 4 hours.
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key_cache_save_period: 14400
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# Number of keys from the key cache to save
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# Disabled by default, meaning all keys are going to be saved
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# key_cache_keys_to_save: 100
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# Maximum size of the row cache in memory.
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# NOTE: if you reduce the size, you may not get you hottest keys loaded on startup.
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#
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# Default value is 0, to disable row caching.
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row_cache_size_in_mb: 0
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# Duration in seconds after which Cassandra should
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# safe the row cache. Caches are saved to saved_caches_directory as specified
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# in this configuration file.
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#
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# Saved caches greatly improve cold-start speeds, and is relatively cheap in
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# terms of I/O for the key cache. Row cache saving is much more expensive and
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# has limited use.
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#
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# Default is 0 to disable saving the row cache.
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row_cache_save_period: 0
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# Number of keys from the row cache to save
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# Disabled by default, meaning all keys are going to be saved
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# row_cache_keys_to_save: 100
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# The off-heap memory allocator. Affects storage engine metadata as
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# well as caches. Experiments show that JEMAlloc saves some memory
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# than the native GCC allocator (i.e., JEMalloc is more
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# fragmentation-resistant).
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#
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# Supported values are: NativeAllocator, JEMallocAllocator
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#
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# If you intend to use JEMallocAllocator you have to install JEMalloc as library and
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# modify cassandra-env.sh as directed in the file.
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#
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# Defaults to NativeAllocator
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# memory_allocator: NativeAllocator
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# saved caches
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saved_caches_directory: .cassandra/var/lib/cassandra/saved_caches
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# commitlog_sync may be either "periodic" or "batch."
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# When in batch mode, Cassandra won't ack writes until the commit log
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# has been fsynced to disk. It will wait up to
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# commitlog_sync_batch_window_in_ms milliseconds for other writes, before
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# performing the sync.
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#
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# commitlog_sync: batch
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# commitlog_sync_batch_window_in_ms: 50
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#
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# the other option is "periodic" where writes may be acked immediately
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# and the CommitLog is simply synced every commitlog_sync_period_in_ms
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# milliseconds. By default this allows 1024*(CPU cores) pending
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# entries on the commitlog queue. If you are writing very large blobs,
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# you should reduce that; 16*cores works reasonably well for 1MB blobs.
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# It should be at least as large as the concurrent_writes setting.
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commitlog_sync: periodic
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commitlog_sync_period_in_ms: 10000
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# commitlog_periodic_queue_size:
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# The size of the individual commitlog file segments. A commitlog
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# segment may be archived, deleted, or recycled once all the data
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# in it (potentially from each columnfamily in the system) has been
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# flushed to sstables.
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#
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# The default size is 32, which is almost always fine, but if you are
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# archiving commitlog segments (see commitlog_archiving.properties),
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# then you probably want a finer granularity of archiving; 8 or 16 MB
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# is reasonable.
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commitlog_segment_size_in_mb: 32
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# any class that implements the SeedProvider interface and has a
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# constructor that takes a Map<String, String> of parameters will do.
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seed_provider:
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# Addresses of hosts that are deemed contact points.
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# Cassandra nodes use this list of hosts to find each other and learn
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# the topology of the ring. You must change this if you are running
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# multiple nodes!
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- class_name: org.apache.cassandra.locator.SimpleSeedProvider
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parameters:
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# seeds is actually a comma-delimited list of addresses.
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# Ex: "<ip1>,<ip2>,<ip3>"
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- seeds: "127.0.0.1"
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# For workloads with more data than can fit in memory, Cassandra's
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# bottleneck will be reads that need to fetch data from
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# disk. "concurrent_reads" should be set to (16 * number_of_drives) in
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# order to allow the operations to enqueue low enough in the stack
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# that the OS and drives can reorder them.
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#
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# On the other hand, since writes are almost never IO bound, the ideal
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# number of "concurrent_writes" is dependent on the number of cores in
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# your system; (8 * number_of_cores) is a good rule of thumb.
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concurrent_reads: 32
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concurrent_writes: 32
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# Total memory to use for sstable-reading buffers. Defaults to
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# the smaller of 1/4 of heap or 512MB.
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# file_cache_size_in_mb: 512
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# Total memory to use for memtables. Cassandra will flush the largest
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# memtable when this much memory is used.
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# If omitted, Cassandra will set it to 1/3 of the heap.
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# memtable_total_space_in_mb: 2048
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# Total space to use for commitlogs. Since commitlog segments are
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# mmapped, and hence use up address space, the default size is 32
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# on 32-bit JVMs, and 1024 on 64-bit JVMs.
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#
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# If space gets above this value (it will round up to the next nearest
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# segment multiple), Cassandra will flush every dirty CF in the oldest
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# segment and remove it. So a small total commitlog space will tend
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# to cause more flush activity on less-active columnfamilies.
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# commitlog_total_space_in_mb: 4096
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# This sets the amount of memtable flush writer threads. These will
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# be blocked by disk io, and each one will hold a memtable in memory
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# while blocked. If you have a large heap and many data directories,
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# you can increase this value for better flush performance.
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# By default this will be set to the amount of data directories defined.
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#memtable_flush_writers: 1
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# the number of full memtables to allow pending flush, that is,
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# waiting for a writer thread. At a minimum, this should be set to
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# the maximum number of secondary indexes created on a single CF.
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memtable_flush_queue_size: 4
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# Whether to, when doing sequential writing, fsync() at intervals in
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# order to force the operating system to flush the dirty
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# buffers. Enable this to avoid sudden dirty buffer flushing from
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# impacting read latencies. Almost always a good idea on SSDs; not
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# necessarily on platters.
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trickle_fsync: false
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trickle_fsync_interval_in_kb: 10240
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# TCP port, for commands and data
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storage_port: 7000
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# SSL port, for encrypted communication. Unused unless enabled in
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# encryption_options
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ssl_storage_port: 7001
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# Address to bind to and tell other Cassandra nodes to connect to. You
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# _must_ change this if you want multiple nodes to be able to
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# communicate!
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#
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# Leaving it blank leaves it up to InetAddress.getLocalHost(). This
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# will always do the Right Thing _if_ the node is properly configured
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# (hostname, name resolution, etc), and the Right Thing is to use the
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# address associated with the hostname (it might not be).
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#
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# Setting this to 0.0.0.0 is always wrong.
|
|
|
|
|
listen_address: localhost
|
|
|
|
|
|
|
|
|
|
# Address to broadcast to other Cassandra nodes
|
|
|
|
|
# Leaving this blank will set it to the same value as listen_address
|
|
|
|
|
# broadcast_address: 1.2.3.4
|
|
|
|
|
|
|
|
|
|
# Internode authentication backend, implementing IInternodeAuthenticator;
|
|
|
|
|
# used to allow/disallow connections from peer nodes.
|
|
|
|
|
# internode_authenticator: org.apache.cassandra.auth.AllowAllInternodeAuthenticator
|
|
|
|
|
|
|
|
|
|
# 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.
|
|
|
|
|
start_native_transport: true
|
|
|
|
|
# port for the CQL native transport to listen for clients on
|
|
|
|
|
native_transport_port: 9042
|
|
|
|
|
# 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).
|
|
|
|
|
# native_transport_max_threads: 128
|
|
|
|
|
|
|
|
|
|
# Whether to start the thrift rpc server.
|
|
|
|
|
start_rpc: true
|
|
|
|
|
|
|
|
|
|
# The address to bind the Thrift RPC service and native transport
|
|
|
|
|
# server -- clients connect here.
|
|
|
|
|
#
|
|
|
|
|
# Leaving this blank has the same effect it does for ListenAddress,
|
|
|
|
|
# (i.e. it will be based on the configured hostname of the node).
|
|
|
|
|
#
|
|
|
|
|
# Note that unlike ListenAddress above, it is allowed to specify 0.0.0.0
|
|
|
|
|
# here if you want to listen on all interfaces but is not best practice
|
|
|
|
|
# as it is known to confuse the node auto-discovery features of some
|
|
|
|
|
# client drivers.
|
|
|
|
|
rpc_address: localhost
|
|
|
|
|
# port for Thrift to listen for clients on
|
|
|
|
|
rpc_port: 9160
|
|
|
|
|
|
|
|
|
|
# enable or disable keepalive on rpc connections
|
|
|
|
|
rpc_keepalive: true
|
|
|
|
|
|
|
|
|
|
# Cassandra provides three 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).
|
|
|
|
|
#
|
|
|
|
|
# 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, can 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.
|
|
|
|
|
rpc_server_type: sync
|
|
|
|
|
|
|
|
|
|
# Uncomment rpc_min|max_thread to set request pool size limits.
|
|
|
|
|
#
|
|
|
|
|
# Regardless of your choice of RPC server (see above), 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.
|
|
|
|
|
#
|
|
|
|
|
# rpc_min_threads: 16
|
|
|
|
|
# rpc_max_threads: 2048
|
|
|
|
|
|
|
|
|
|
# uncomment to set socket buffer sizes on rpc connections
|
|
|
|
|
# rpc_send_buff_size_in_bytes:
|
|
|
|
|
# rpc_recv_buff_size_in_bytes:
|
|
|
|
|
|
|
|
|
|
# Uncomment 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
|
|
|
|
|
# internode_send_buff_size_in_bytes:
|
|
|
|
|
# internode_recv_buff_size_in_bytes:
|
|
|
|
|
|
|
|
|
|
# Frame size for thrift (maximum message length).
|
|
|
|
|
thrift_framed_transport_size_in_mb: 15
|
|
|
|
|
|
|
|
|
|
# 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.
|
|
|
|
|
incremental_backups: false
|
|
|
|
|
|
|
|
|
|
# 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.
|
|
|
|
|
snapshot_before_compaction: false
|
|
|
|
|
|
|
|
|
|
# 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.
|
|
|
|
|
auto_snapshot: true
|
|
|
|
|
|
|
|
|
|
# Add column indexes to a row after its contents reach this size.
|
|
|
|
|
# Increase if your column values are large, or if you have a very large
|
|
|
|
|
# number of columns. The competing causes are, Cassandra has to
|
|
|
|
|
# deserialize this much of the row to read a single column, so you want
|
|
|
|
|
# it to be small - at least if you do many partial-row reads - but all
|
|
|
|
|
# the index data is read for each access, so you don't want to generate
|
|
|
|
|
# that wastefully either.
|
|
|
|
|
column_index_size_in_kb: 64
|
|
|
|
|
|
|
|
|
|
# Size limit for rows being compacted in memory. Larger rows will spill
|
|
|
|
|
# over to disk and use a slower two-pass compaction process. A message
|
|
|
|
|
# will be logged specifying the row key.
|
|
|
|
|
in_memory_compaction_limit_in_mb: 64
|
|
|
|
|
|
|
|
|
|
# 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 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 number of cores.
|
|
|
|
|
# Uncomment to make compaction mono-threaded, the pre-0.8 default.
|
|
|
|
|
#concurrent_compactors: 1
|
|
|
|
|
|
|
|
|
|
# Multi-threaded compaction. When enabled, each compaction will use
|
|
|
|
|
# up to one thread per core, plus one thread per sstable being merged.
|
|
|
|
|
# This is usually only useful for SSD-based hardware: otherwise,
|
|
|
|
|
# your concern is usually to get compaction to do LESS i/o (see:
|
|
|
|
|
# compaction_throughput_mb_per_sec), not more.
|
|
|
|
|
multithreaded_compaction: false
|
|
|
|
|
|
|
|
|
|
# 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 account for all types
|
|
|
|
|
# of compaction, including validation compaction.
|
|
|
|
|
compaction_throughput_mb_per_sec: 16
|
|
|
|
|
|
|
|
|
|
# Track cached row keys during compaction, and re-cache their new
|
|
|
|
|
# positions in the compacted sstable. Disable if you use really large
|
|
|
|
|
# key caches.
|
|
|
|
|
compaction_preheat_key_cache: true
|
|
|
|
|
|
|
|
|
|
# Throttles all outbound streaming file transfers on this node to the
|
|
|
|
|
# given total throughput in Mbps. This is necessary because Cassandra does
|
|
|
|
|
# mostly sequential IO when streaming data during bootstrap or repair, which
|
|
|
|
|
# can lead to saturating the network connection and degrading rpc performance.
|
|
|
|
|
# When unset, the default is 200 Mbps or 25 MB/s.
|
|
|
|
|
# stream_throughput_outbound_megabits_per_sec: 200
|
|
|
|
|
|
|
|
|
|
# How long the coordinator should wait for read operations to complete
|
|
|
|
|
read_request_timeout_in_ms: 5000
|
|
|
|
|
# How long the coordinator should wait for seq or index scans to complete
|
|
|
|
|
range_request_timeout_in_ms: 10000
|
|
|
|
|
# How long the coordinator should wait for writes to complete
|
|
|
|
|
write_request_timeout_in_ms: 2000
|
|
|
|
|
# How long a coordinator should continue to retry a CAS operation
|
|
|
|
|
# that contends with other proposals for the same row
|
|
|
|
|
cas_contention_timeout_in_ms: 1000
|
|
|
|
|
# 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.)
|
|
|
|
|
truncate_request_timeout_in_ms: 60000
|
|
|
|
|
# The default timeout for other, miscellaneous operations
|
|
|
|
|
request_timeout_in_ms: 10000
|
|
|
|
|
|
|
|
|
|
# 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 to ntp is installed
|
|
|
|
|
# and the times are synchronized between the nodes.
|
|
|
|
|
cross_node_timeout: false
|
|
|
|
|
|
|
|
|
|
# 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.
|
|
|
|
|
# Default value is 0, which never timeout streams.
|
|
|
|
|
# streaming_socket_timeout_in_ms: 0
|
|
|
|
|
|
|
|
|
|
# phi value that must be reached for a host to be marked down.
|
|
|
|
|
# most users should never need to adjust this.
|
|
|
|
|
# phi_convict_threshold: 8
|
|
|
|
|
|
|
|
|
|
# endpoint_snitch -- Set this to a class that implements
|
|
|
|
|
# IEndpointSnitch. The snitch has two functions:
|
|
|
|
|
# - it teaches Cassandra enough about your network topology to route
|
|
|
|
|
# requests efficiently
|
|
|
|
|
# - 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 improves cache locality
|
|
|
|
|
# when disabling read repair, which can further improve throughput.
|
|
|
|
|
# Only appropriate for single-datacenter deployments.
|
|
|
|
|
# - PropertyFileSnitch:
|
|
|
|
|
# Proximity is determined by rack and data center, which are
|
|
|
|
|
# explicitly configured in cassandra-topology.properties.
|
|
|
|
|
# - GossipingPropertyFileSnitch
|
|
|
|
|
# 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.
|
|
|
|
|
# - 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 (as it did Facebook's), this is best used
|
|
|
|
|
# as an example of writing a custom Snitch class.
|
|
|
|
|
# - 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.)
|
|
|
|
|
#
|
|
|
|
|
# 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.
|
|
|
|
|
endpoint_snitch: SimpleSnitch
|
|
|
|
|
|
|
|
|
|
# controls how often to perform the more expensive part of host score
|
|
|
|
|
# calculation
|
|
|
|
|
dynamic_snitch_update_interval_in_ms: 100
|
|
|
|
|
# controls how often to reset all host scores, allowing a bad host to
|
|
|
|
|
# possibly recover
|
|
|
|
|
dynamic_snitch_reset_interval_in_ms: 600000
|
|
|
|
|
# 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.
|
|
|
|
|
dynamic_snitch_badness_threshold: 0.1
|
|
|
|
|
|
|
|
|
|
# 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 as described below.
|
|
|
|
|
request_scheduler: org.apache.cassandra.scheduler.NoScheduler
|
|
|
|
|
|
|
|
|
|
# Scheduler Options vary based on the type of scheduler
|
|
|
|
|
# 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
|
|
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# overriding the default which is 1.
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# - weights -- Weights are optional and will default to 1 or the
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# overridden default_weight. The weight translates into how
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# many requests are handled during each turn of the
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# RoundRobin, based on the scheduler id.
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#
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# request_scheduler_options:
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# throttle_limit: 80
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# default_weight: 5
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# weights:
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# Keyspace1: 1
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# Keyspace2: 5
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# request_scheduler_id -- An identifier based on which to perform
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# the request scheduling. Currently the only valid option is keyspace.
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# request_scheduler_id: keyspace
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# Enable or disable inter-node encryption
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# Default settings are TLS v1, RSA 1024-bit keys (it is imperative that
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# users generate their own keys) TLS_RSA_WITH_AES_128_CBC_SHA as the cipher
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# suite for authentication, key exchange and encryption of the actual data transfers.
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# NOTE: No custom encryption options are enabled at the moment
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# The available internode options are : all, none, dc, rack
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#
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# If set to dc cassandra will encrypt the traffic between the DCs
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# If set to rack cassandra will encrypt the traffic between the racks
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#
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# The passwords used in these options must match the passwords used when generating
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# the keystore and truststore. For instructions on generating these files, see:
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# http://download.oracle.com/javase/6/docs/technotes/guides/security/jsse/JSSERefGuide.html#CreateKeystore
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#
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server_encryption_options:
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internode_encryption: none
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keystore: conf/.keystore
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keystore_password: cassandra
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truststore: conf/.truststore
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truststore_password: cassandra
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# More advanced defaults below:
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# protocol: TLS
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# algorithm: SunX509
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# store_type: JKS
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# cipher_suites: [TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_256_CBC_SHA]
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# require_client_auth: false
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# enable or disable client/server encryption.
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client_encryption_options:
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enabled: false
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keystore: conf/.keystore
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keystore_password: cassandra
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# require_client_auth: false
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# Set trustore and truststore_password if require_client_auth is true
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# truststore: conf/.truststore
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# truststore_password: cassandra
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# More advanced defaults below:
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# protocol: TLS
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# algorithm: SunX509
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# store_type: JKS
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# cipher_suites: [TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_256_CBC_SHA]
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# internode_compression controls whether traffic between nodes is
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# compressed.
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# can be: all - all traffic is compressed
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# dc - traffic between different datacenters is compressed
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# none - nothing is compressed.
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internode_compression: all
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# Enable or disable tcp_nodelay for inter-dc communication.
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# Disabling it will result in larger (but fewer) network packets being sent,
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# reducing overhead from the TCP protocol itself, at the cost of increasing
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# latency if you block for cross-datacenter responses.
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inter_dc_tcp_nodelay: false
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# Enable or disable kernel page cache preheating from contents of the key cache after compaction.
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# When enabled it would preheat only first "page" (4KB) of each row to optimize
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# for sequential access. Note: This could be harmful for fat rows, see CASSANDRA-4937
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# for further details on that topic.
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preheat_kernel_page_cache: false
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Mark Paluch