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# Cassandra storage config YAML
#NOTE !!!!!!!! NOTE
# See http://wiki.apache.org/cassandra/StorageConfiguration for
# full explanations of configuration directives
#NOTE !!!!!!!! NOTE
# The name of the cluster. This is mainly used to prevent machines in
# one logical cluster from joining another.
cluster_name: 'TestCluster'
# You should always specify InitialToken when setting up a production
# cluster for the first time, and often when adding capacity later.
# The principle is that each node should be given an equal slice of
# the token ring; see http://wiki.apache.org/cassandra/Operations
# for more details.
#
# If blank, Cassandra will request a token bisecting the range of
# the heaviest-loaded existing node. If there is no load information
# available, such as is the case with a new cluster, it will pick
# a random token, which will lead to hot spots.
initial_token:
# Set to true to make new [non-seed] nodes automatically migrate data
# to themselves from the pre-existing nodes in the cluster. Defaults
# to false because you can only bootstrap N machines at a time from
# an existing cluster of N, so if you are bringing up a cluster of
# 10 machines with 3 seeds you would have to do it in stages. Leaving
# this off for the initial start simplifies that.
auto_bootstrap: false
# See http://wiki.apache.org/cassandra/HintedHandoff
hinted_handoff_enabled: true
# authentication backend, implementing IAuthenticator; used to identify users
authenticator: org.apache.cassandra.auth.AllowAllAuthenticator
# authorization backend, implementing IAuthority; used to limit access/provide permissions
authority: org.apache.cassandra.auth.AllowAllAuthority
# any IPartitioner may be used, including your own as long as it is on
# the classpath. Out of the box, Cassandra provides
# org.apache.cassandra.dht.RandomPartitioner
# org.apache.cassandra.dht.ByteOrderedPartitioner,
# org.apache.cassandra.dht.OrderPreservingPartitioner, and
# org.apache.cassandra.dht.CollatingOrderPreservingPartitioner.
# (CollatingOPP colates according to EN,US rules, not naive byte
# ordering. Use this as an example if you need locale-aware collation.)
partitioner: org.apache.cassandra.dht.RandomPartitioner
# directories where Cassandra should store data on disk.
data_file_directories:
- target/embeddedCassandra/data
# commit log
commitlog_directory: target/embeddedCassandra/commitlog
# saved caches
saved_caches_directory: target/embeddedCassandra/saved_caches
# Size to allow commitlog to grow to before creating a new segment
commitlog_rotation_threshold_in_mb: 128
# 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
# CommitLogSyncBatchWindowInMS milliseconds for other writes, before
# performing the sync.
commitlog_sync: periodic
# the other option is "timed," where writes may be acked immediately
# and the CommitLog is simply synced every commitlog_sync_period_in_ms
# milliseconds.
commitlog_sync_period_in_ms: 10000
# 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!
seed_provider:
- class_name: org.apache.cassandra.locator.SimpleSeedProvider
parameters:
- seeds: "127.0.0.1"
# Access mode. mmapped i/o is substantially faster, but only practical on
# a 64bit machine (which notably does not include EC2 "small" instances)
# or relatively small datasets. "auto", the safe choice, will enable
# mmapping on a 64bit JVM. Other values are "mmap", "mmap_index_only"
# (which may allow you to get part of the benefits of mmap on a 32bit
# machine by mmapping only index files) and "standard".
# (The buffer size settings that follow only apply to standard,
# non-mmapped i/o.)
disk_access_mode: auto
# Unlike most systems, in Cassandra writes are faster than reads, so
# you can afford more of those in parallel. A good rule of thumb is 2
# concurrent reads per processor core. Increase ConcurrentWrites to
# the number of clients writing at once if you enable CommitLogSync +
# CommitLogSyncDelay. -->
concurrent_reads: 2
concurrent_writes: 4
# 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 you have a large heap and many data directories,
# you can increase this value for better flush performance.
# By default this will be set to the amount of data directories defined.
#memtable_flush_writers: 1
# Buffer size to use when performing contiguous column slices.
# Increase this to the size of the column slices you typically perform
sliced_buffer_size_in_kb: 64
# TCP port, for commands and data
storage_port: 7000
# Address 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!
#
# 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 this to 0.0.0.0 is always wrong.
listen_address: 127.0.0.1
# The address to bind the Thrift RPC service to -- clients connect
# here. Unlike ListenAddress above, you *can* specify 0.0.0.0 here if
# you want Thrift to listen on all interfaces.
#
# Leaving this blank has the same effect it does for ListenAddress,
# (i.e. it will be based on the configured hostname of the node).
rpc_address: localhost
# port for Thrift to listen for clients on
rpc_port: 9171
# enable or disable keepalive on rpc connections
rpc_keepalive: true
# uncomment to set socket buffer sizes on rpc connections
# rpc_send_buff_size_in_bytes:
# rpc_recv_buff_size_in_bytes:
# Frame size for thrift (maximum field length).
# 0 disables TFramedTransport in favor of TSocket. This option
# is deprecated; we strongly recommend using Framed mode.
thrift_framed_transport_size_in_mb: 15
# The max length of a thrift message, including all fields and
# internal thrift overhead.
thrift_max_message_length_in_mb: 16
# 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
# change this to increase the compaction thread's priority. In java, 1 is the
# lowest priority and that is our default.
# compaction_thread_priority: 1
# The threshold size in megabytes the binary memtable must grow to,
# before it's submitted for flushing to disk.
binary_memtable_throughput_in_mb: 256
# 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: 16
# Time to wait for a reply from other nodes before failing the command
rpc_timeout_in_ms: 10000
# 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, which will let Cassandra know enough
# about your network topology to route requests efficiently.
# Out of the box, Cassandra provides
# - org.apache.cassandra.locator.SimpleSnitch:
# Treats Strategy order as proximity. This improves cache locality
# when disabling read repair, which can further improve throughput.
# - org.apache.cassandra.locator.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
# org.apache.cassandra.locator.PropertyFileSnitch:
# - Proximity is determined by rack and data center, which are
# explicitly configured in cassandra-rack.properties.
endpoint_snitch: org.apache.cassandra.locator.SimpleSnitch
# dynamic_snitch -- This boolean controls whether the above snitch is
# wrapped with a dynamic snitch, which will monitor read latencies
# and avoid reading from hosts that have slowed (due to compaction,
# for instance)
dynamic_snitch: true
# 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.
dynamic_snitch_badness_threshold: 0.0
# 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
encryption_options:
internode_encryption: none
keystore: conf/.keystore
keystore_password: cassandra
truststore: conf/.truststore
truststore_password: cassandra
# 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
# 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.
#
# request_scheduler_options:
# throttle_limit: 80
# default_weight: 5
# weights:
# Keyspace1: 1
# Keyspace2: 5
# request_scheduler_id -- An identifer based on which to perform
# the request scheduling. Currently the only valid option is keyspace.
# request_scheduler_id: keyspace
# The Index Interval determines how large the sampling of row keys
# is for a given SSTable. The larger the sampling, the more effective
# the index is at the cost of space.
index_interval: 128
# A ColumnFamily is the Cassandra concept closest to a relational table.
#
# Keyspaces are separate groups of ColumnFamilies. Except in very
# unusual circumstances you will have one Keyspace per application.
#
# Keyspace required parameters:
# - name: name of the keyspace; "system" and "definitions" are
# reserved for Cassandra Internals.
# - replica_placement_strategy: the class that determines how replicas
# are distributed among nodes. Contains both the class as well as
# configuration information. Must extend AbstractReplicationStrategy.
# Out of the box, Cassandra provides
# * org.apache.cassandra.locator.SimpleStrategy
# * org.apache.cassandra.locator.NetworkTopologyStrategy
# * org.apache.cassandra.locator.OldNetworkTopologyStrategy
#
# SimpleStrategy merely places the first
# replica at the node whose token is closest to the key (as determined
# by the Partitioner), and additional replicas on subsequent nodes
# along the ring in increasing Token order.
#
# With NetworkTopologyStrategy,
# for each datacenter, you can specify how many replicas you want
# on a per-keyspace basis. Replicas are placed on different racks
# within each DC, if possible. This strategy also requires rack aware
# snitch, such as RackInferringSnitch or PropertyFileSnitch.
# An example:
# - name: Keyspace1
# replica_placement_strategy: org.apache.cassandra.locator.NetworkTopologyStrategy
# strategy_options:
# DC1 : 3
# DC2 : 2
# DC3 : 1
#
# OldNetworkToplogyStrategy [formerly RackAwareStrategy]
# places one replica in each of two datacenters, and the third on a
# different rack in in the first. Additional datacenters are not
# guaranteed to get a replica. Additional replicas after three are placed
# in ring order after the third without regard to rack or datacenter.
#
# - replication_factor: Number of replicas of each row
# - column_families: column families associated with this keyspace
#
# ColumnFamily required parameters:
# - name: name of the ColumnFamily. Must not contain the character "-".
# - compare_with: tells Cassandra how to sort the columns for slicing
# operations. The default is BytesType, which is a straightforward
# lexical comparison of the bytes in each column. Other options are
# AsciiType, UTF8Type, LexicalUUIDType, TimeUUIDType, LongType,
# and IntegerType (a generic variable-length integer type).
# You can also specify the fully-qualified class name to a class of
# your choice extending org.apache.cassandra.db.marshal.AbstractType.
#
# ColumnFamily optional parameters:
# - keys_cached: specifies the number of keys per sstable whose
# locations we keep in memory in "mostly LRU" order. (JUST the key
# locations, NOT any column values.) Specify a fraction (value less
# than 1) or an absolute number of keys to cache. Defaults to 200000
# keys.
# - rows_cached: specifies the number of rows whose entire contents we
# cache in memory. Do not use this on ColumnFamilies with large rows,
# or ColumnFamilies with high write:read ratios. Specify a fraction
# (value less than 1) or an absolute number of rows to cache.
# Defaults to 0. (i.e. row caching is off by default)
# - comment: used to attach additional human-readable information about
# the column family to its definition.
# - read_repair_chance: specifies the probability with which read
# repairs should be invoked on non-quorum reads. must be between 0
# and 1. defaults to 1.0 (always read repair).
# - gc_grace_seconds: specifies the time to wait before garbage
# collecting tombstones (deletion markers). defaults to 864000 (10
# days). See http://wiki.apache.org/cassandra/DistributedDeletes
# - default_validation_class: specifies a validator class to use for
# validating all the column values in the CF.
# - min_compaction_threshold: the minimum number of SSTables needed
# to start a minor compaction. increasing this will cause minor
# compactions to start less frequently and be more intensive. setting
# this to 0 disables minor compactions. defaults to 4.
# - max_compaction_threshold: the maximum number of SSTables allowed
# before a minor compaction is forced. decreasing this will cause
# minor compactions to start more frequently and be less intensive.
# setting this to 0 disables minor compactions. defaults to 32.
# - row_cache_save_period_in_seconds: number of seconds between saving
# row caches. The row caches can be saved periodically and if one
# exists on startup it will be loaded.
# - key_cache_save_period_in_seconds: number of seconds between saving
# key caches. The key caches can be saved periodically and if one
# exists on startup it will be loaded.
# - memtable_flush_after_mins: The maximum time to leave a dirty table
# unflushed. This should be large enough that it won't cause a flush
# storm of all memtables during periods of inactivity.
# - memtable_throughput_in_mb: The maximum size of the memtable before
# it is flushed. If undefined, 1/8 * heapsize will be used.
# - memtable_operations_in_millions: Number of operations in millions
# before the memtable is flushed. If undefined, throughput / 64 * 0.3
# will be used.
#
# NOTE: this keyspace definition is for demonstration purposes only.
# Cassandra will not load these definitions during startup. See
# http://wiki.apache.org/cassandra/FAQ#no_keyspaces for an explanation.
