Redis 的 master/slave 复制:
Redis 的 master/slave 数据复制方式可以是一主一从或者是一主多从的方式,Redis 在 master 是非阻塞模式,也就是说在 slave 执行数据同步的时候,master 是可以接受客户端的
请求的,并不影响同步数据的一致性,然而在 slave 端是阻塞模式的,slave 在同步 master 数据时,并不能够响应客户端的查询
Redis 的 master/slave 模式下,master 提供数据读写服务,而 slave 只提供读服务
Redis 的 master/slave 的配置方式是在 slave 主机的 Redis 目录下的 redis.conf 配置文件中 添加:
slaveof master_ip master_port
例如:
我们配置我们的 slave 为:redis-slave.conf daemonize yes
pidfile redis-slave.pid port 6380 timeout 300 loglevel verbose logfile stdout databases 16 save 900 1 save 300 10 save 60 10000
rdbcompression yes
dbfilename dump-slave.rdb dir /home/falcon/redis-2.0.0/ slaveof 127.0.0.1 6379 appendonly no
appendfsync everysec vm-enabled no
vm-swap-file logs/redis-slave.swap vm-max-memory 0
vm-page-size 32 IT 运维专家网 http://www.LinuxTone.Org vm-pages 134217728 vm-max-threads 4 glueoutputbuf yes
hash-max-zipmap-entries 64 hash-max-zipmap-value 512 activerehashing yes
启动 slave:
[[email protected] ~/redis-2.0.0]$ ./redis-server redis-slave.conf
查看状态信息:
[[email protected] ~/redis-2.0.0]$ ./redis-cli -p 6380 info redis_version:1.3.17 redis_git_sha1:00000000 redis_git_dirty:0 arch_bits:32
multiplexing_api:epoll process_id:10772
uptime_in_seconds:249 uptime_in_days:0 connected_clients:2 connected_slaves:0 blocked_clients:0
used_memory:1756868
used_memory_human:1.68M changes_since_last_save:0 bgsave_in_progress:0
last_save_time:1281654285 bgrewriteaof_in_progress:0 total_connections_received:13 total_commands_processed:9 expired_keys:0
hash_max_zipmap_entries:64 hash_max_zipmap_value:512 pubsub_channels:0 pubsub_patterns:0 vm_enabled:0 role:slave
master_host:127.0.0.1 master_port:6379 master_link_status:up
master_last_io_seconds_ago:248 db0:keys=23,expires=0
[[email protected] ~/redis-2.0.0]$ ./redis-cli -p 6379 info IT 运维专家网http://www.LinuxTone.Org redis_version:1.3.17 redis_git_sha1:00000000 redis_git_dirty:0 arch_bits:32
multiplexing_api:epoll process_id:7663
uptime_in_seconds:16787 uptime_in_days:0 connected_clients:1 connected_slaves:1 blocked_clients:0
used_memory:1757232
used_memory_human:1.68M changes_since_last_save:0 bgsave_in_progress:0
last_save_time:1281654286 bgrewriteaof_in_progress:0 total_connections_received:835 total_commands_processed:55953 expired_keys:1
hash_max_zipmap_entries:64 hash_max_zipmap_value:512
pubsub_channels:0 pubsub_patterns:0 vm_enabled:0 role:master
db0:keys=23,expires=0
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