Redis 发布订阅 ##在一个客户端开启订阅频道redisChat [redis@zabbix Desktop]$ redis-cli -h localhost -p 6379 -a redis #订阅给定的一个或多个频道的信息 localhost:6379> SUBSCRIBE redisChat Reading messages... (press Ctrl-C to quit) 1) "subscribe" 2) "redisChat" 3) (integer) 1 在另一个客户端向频道发布消息 [root@zabbix bin]# redis-cli -h localhost -p 6379 -a redis #将信息发送到指定的频道。 localhost:6379> PUBLISH redisChat "Redis is a great caching technique" (integer) 1 localhost:6379> 这时候查看订阅客户端可以看到以下信息 1) "message" 2) "redisChat" 3) "Redis is a great caching technique" Redis 事务 #标记一个事务块的开始。 localhost:6379> MULTI OK localhost:6379> set name donald QUEUED localhost:6379> get name QUEUED localhost:6379> sadd user rain jamel QUEUED localhost:6379> smembers user QUEUED #执行所有事务块内的命令 localhost:6379> exec 1) OK 2) "donald" 3) (integer) 2 4) 1) "rain" 2) "jamel" localhost:6379> Redis 连接 localhost:6379> auth redis OK localhost:6379> ping PONG localhost:6379> echo hello "hello" #切换数据库,默认数据库为0,最大为databases # Set the number of databases. The default database is DB 0, you can select # a different one on a per-connection basis using SELECT <dbid> where # dbid is a number between 0 and 'databases'-1 databases 16 localhost:6379> select 0 OK localhost:6379> get name "donald" localhost:6379> smembers user 1) "rain" 2) "jamel" localhost:6379> Redis 服务器 ##服务器key数量 localhost:6379> dbsize (integer) 3 ##异步执行一个 AOF(AppendOnly File) 文件重写操作 localhost:6379> BGREWRITEAOF Background append only file rewriting started #在后台异步保存当前数据库的数据到磁盘 localhost:6379> BGSAVE Background saving started #获取服务器时间 localhost:6379> time 1) "1482283953" 2) "871588" ##服务器角色 localhost:6379> role 1) "master" 2) (integer) 0 3) (empty list or set) ##获取 Redis 服务器的各种信息和统计数值 localhost:6379> info #服务器 # Server redis_version:3.0.5 redis_git_sha1:00000000 redis_git_dirty:0 redis_build_id:2b4372a303619568 redis_mode:standalone os:Linux 3.10.0-327.22.2.el7.x86_64 x86_64 arch_bits:64 multiplexing_api:epoll gcc_version:4.8.5 process_id:4839 run_id:887dbc822c9f9d497c05fc11cc34a6a822357c18 tcp_port:6379 uptime_in_seconds:1314 uptime_in_days:0 hz:10 lru_clock:5888962 config_file:/usr/local/redis/conf/redis.conf #客户端 # Clients connected_clients:1 client_longest_output_list:0 client_biggest_input_buf:0 blocked_clients:0 #内存 # Memory used_memory:815592 used_memory_human:796.48K used_memory_rss:8212480 used_memory_peak:835392 used_memory_peak_human:815.81K used_memory_lua:36864 mem_fragmentation_ratio:10.07 mem_allocator:jemalloc-3.6.0 ##持久化状态 # Persistence loading:0 rdb_changes_since_last_save:0 rdb_bgsave_in_progress:0 rdb_last_save_time:1482283929 rdb_last_bgsave_status:ok rdb_last_bgsave_time_sec:0 rdb_current_bgsave_time_sec:-1 aof_enabled:1 aof_rewrite_in_progress:0 aof_rewrite_scheduled:0 aof_last_rewrite_time_sec:0 aof_current_rewrite_time_sec:-1 aof_last_bgrewrite_status:ok aof_last_write_status:ok aof_current_size:172 aof_base_size:172 aof_pending_rewrite:0 aof_buffer_length:0 aof_rewrite_buffer_length:0 aof_pending_bio_fsync:0 aof_delayed_fsync:0 ## # Stats total_connections_received:3 total_commands_processed:25 instantaneous_ops_per_sec:0 total_net_input_bytes:711 total_net_output_bytes:564 instantaneous_input_kbps:0.00 instantaneous_output_kbps:0.00 rejected_connections:0 sync_full:0 sync_partial_ok:0 sync_partial_err:0 expired_keys:0 evicted_keys:0 keyspace_hits:9 keyspace_misses:0 pubsub_channels:0 pubsub_patterns:0 latest_fork_usec:764 migrate_cached_sockets:0 ##集群 # Replication role:master connected_slaves:0 master_repl_offset:0 repl_backlog_active:0 repl_backlog_size:1048576 repl_backlog_first_byte_offset:0 repl_backlog_histlen:0 ##CPU # CPU used_cpu_sys:2.25 used_cpu_user:0.12 used_cpu_sys_children:0.35 used_cpu_user_children:0.00 # Cluster cluster_enabled:0 # Keyspace db0:keys=3,expires=0,avg_ttl=0 localhost:6379> #实时打印出 Redis 服务器接收到的命令,调试用 localhost:6379> MONITOR OK 1482284030.614149 [0 127.0.0.1:46386] "AUTH" "redis" 1482284033.695838 [0 127.0.0.1:46386] "get" "name" 1482284045.407687 [0 127.0.0.1:46386] "set" "name" "rain" #删除当前数据库的所有key localhost:6379> FLUSHDB OK localhost:6379> dbsize (integer) 0 localhost:6379> Redis 数据备份与恢复 localhost:6379> #创建redis 备份文件也可以使用命令 BGSAVE,该命令在后台执行 localhost:6379> bgsave Background saving started 恢复数据 如果需要恢复数据,只需将备份文件 (dump.rdb) 移动到 redis 安装目录并启动服务即可 ##获取数据目录 localhost:6379> CONFIG GET dir 1) "dir" 2) "/redis/data" Redis 安全 ##获取验证密码 localhost:6379> CONFIG get requirepass 1) "requirepass" 2) "redis" localhost:6379> localhost:6379> auth redis OK localhost:6379> #设置密码 CONFIG set requirepass "redis Redis 客户端连接 #返回连接到 redis 服务的客户端列表 localhost:6379> client list id=2 addr=127.0.0.1:46380 fd=7 name= age=2699 idle=140 flags=O db=0 sub=0 psub=0 multi=-1 qbuf=0 qbuf-free=0 obl=56 oll=0 omem=0 events=rw cmd=monitor id=5 addr=127.0.0.1:46386 fd=6 name= age=1383 idle=0 flags=N db=0 sub=0 psub=0 multi=-1 qbuf=0 qbuf-free=32768 obl=0 oll=0 omem=0 events=r cmd=client #设置当前连接的名称 localhost:6379> client setname rain OK #获取通过 CLIENT SETNAME 命令设置的服务名称 localhost:6379> client getname "rain"
Redis 发布订阅,事务,备份恢复,监控
猜你喜欢
转载自donald-draper.iteye.com/blog/2346447
今日推荐
周排行