Cassandra配置cassanra.yaml详解

这篇博客，对Cassandra配置-cassandra.yaml的配置项进行重点解释。

Option	Default Value
authenticator	org.apache.cassandra.auth.AllowAllAuthenticator
authority	org.apache.cassandra.auth.AllowAllAuthority
broadcast_address	same as listen_address
cluster_name	Test Cluster(这个名字修改了，cassandra-cli连接的时候，需要指定，默认就是连的这个。)
column_index_size_in_kb	64
commitlog_directory	/var/lib/cassandra/commitlog
commitlog_sync	periodic
commitlog_sync_period_in_ms	10000 (ten seconds)
commitlog_total_space_in_mb	4096
compaction_preheat_key_cache	TRUE
compaction_throughput_mb_per_sec	16(默认16M，推荐是写入速度的16-32倍，考虑Compaction的速度，这个需要根据实际情况设定)
concurrent_compactors	One per CPU core
concurrent_reads	32
concurrent_writes	32
data_file_directories	/var/lib/cassandra/data(可以指定多个目录，会提高性能，但是会出现数据分步不均匀的情况)
dynamic_snitch	TRUE
dynamic_snitch_badness_threshold	0
dynamic_snitch_reset_interval_in_ms	600000
dynamic_snitch_update_interval_in_ms	100
endpoint_snitch	org.apache.cassandra.locator.SimpleSnitch
flush_largest_memtables_at	0.75
hinted_handoff_enabled	TRUE
hinted_handoff_throttle_delay_in_ms	50
in_memory_compaction_limit_in_mb	64
incremental_backups	FALSE
index_interval	128(官方推荐128是最小的，可以更大。但实际中，如果内存比较大，可以适当减小，根据自己的需要设定，间隔小，就会快。)
initial_token	n/a
internode_encryption	none
keystore	conf/.keystore
keystore_password	cassandra
listen_address	localhost
max_hint_window_in_ms	3600000 (one hour)
memtable_flush_queue_size	4
memtable_flush_writers	One per data directory
memtable_total_space_in_mb	1/3 of the heap
multithreaded_compaction	FALSE
partitioner	org.apache.cassandra.dht.RandomPartitioner
phi_convict_threshold	8
reduce_cache_capacity_to	0.6
reduce_cache_sizes_at	0.85
request_scheduler	org.apache.cassandra.scheduler.NoScheduler
request_scheduler_id	keyspace
rpc_address	localhost
rpc_keepalive	TRUE
rpc_max_threads	Unlimited
rpc_min_threads	16
rpc_port	9160
rpc_recv_buff_size_in_bytes	n/a
rpc_send_buff_size_in_bytes	n/a
rpc_server_type	sync
rpc_timeout_in_ms	10000
saved_caches_directory	/var/lib/cassandra/saved_caches
seeds	127.0.0.1
seed_provider	org.apache.cassandra.locator.SimpleSeedProvider
sliced_buffer_size_in_kb	64
snapshot_before_compaction	FALSE
storage_port	700
stream_throughput _outbound_megabits_per_sec	400
thrift_framed_transport_size_in_mb	15
thrift_max_message_length_in_mb	16
truststore	conf/.truststore
truststore_password	cassandra

上表中的配置项有一些，比较需要注意的，我就加了注释。后面会逐渐补充。