[Memcached]操作

telnet连接memcached

查看端口是否可访问

# telnet 172.16.1.1 11211
Trying 172.16.1.1...
Connected to 172.16.1.1.
Escape character is '^]'.
^]

添加获取数据

添加语法set没有值的时候添加，有值的时候修改

set key flags exptime bytes [noreply] 
value

key：键值 key-value 结构中的 key，用于查找缓存值。
flags：可以包括键值对的整型参数，客户机使用它存储关于键值对的额外信息。
exptime：在缓存中保存键值对的时间长度（以秒为单位，0 表示永远）
bytes：在缓存中存储的字节数
noreply（可选）：该参数告知服务器不需要返回数据
value：存储的值（始终位于第二行）（可直接理解为key-value结构中的value）

set username 0 60 3
abc
STORED
get username
VALUE username 0 3
abc
END

删除

delete username

# 没有提示说明删除成功

清除所有

flush all

查看memcached状态

# stats

STAT pid 37102
STAT uptime 4644
STAT time 1581828962
STAT version 1.5.22
STAT libevent 2.1.11-stable
STAT pointer_size 64
STAT rusage_user 0.434336
STAT rusage_system 0.283283
STAT max_connections 1024
STAT curr_connections 2
STAT total_connections 5
STAT rejected_connections 3
STAT connection_structures 3
STAT reserved_fds 20
STAT cmd_get 2
STAT cmd_set 4
STAT cmd_flush 0
STAT cmd_touch 0
STAT cmd_meta 0
STAT get_hits 2
STAT get_misses 0
STAT get_expired 0
STAT get_flushed 0
STAT delete_misses 2
STAT delete_hits 1
STAT incr_misses 0
STAT incr_hits 0
STAT decr_misses 0
STAT decr_hits 0
STAT cas_misses 0
STAT cas_hits 0
STAT cas_badval 0
STAT touch_hits 0
STAT touch_misses 0
STAT auth_cmds 0
STAT auth_errors 0
STAT bytes_read 305
STAT bytes_written 5921
STAT limit_maxbytes 67108864
STAT accepting_conns 1
STAT listen_disabled_num 0
STAT time_in_listen_disabled_us 0
STAT threads 4
STAT conn_yields 0
STAT hash_power_level 16
STAT hash_bytes 524288
STAT hash_is_expanding 0
STAT slab_reassign_rescues 0
STAT slab_reassign_chunk_rescues 0
STAT slab_reassign_evictions_nomem 0
STAT slab_reassign_inline_reclaim 0
STAT slab_reassign_busy_items 0
STAT slab_reassign_busy_deletes 0
STAT slab_reassign_running 0
STAT slabs_moved 0
STAT lru_crawler_running 0
STAT lru_crawler_starts 3060
STAT lru_maintainer_juggles 5967
STAT malloc_fails 0
STAT log_worker_dropped 0
STAT log_worker_written 0
STAT log_watcher_skipped 0
STAT log_watcher_sent 0
STAT bytes 70
STAT curr_items 1
STAT total_items 4
STAT slab_global_page_pool 0
STAT expired_unfetched 0
STAT evicted_unfetched 0
STAT evicted_active 0
STAT evictions 0
STAT reclaimed 1
STAT crawler_reclaimed 0
STAT crawler_items_checked 1
STAT lrutail_reflocked 0
STAT moves_to_cold 4
STAT moves_to_warm 0
STAT moves_within_lru 0
STAT direct_reclaims 0
STAT lru_bumps_dropped 0
END