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。
