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memcache如何命令行查看所有key

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众所周知,Redis是有个keys的命令查询所有key的,当然现网不建议这么玩儿。

那上古缓存服务memcache有类似的指令吗?业务上碰到一个需要人工校验定位问题的场景,需要用类似的指令,搜了下,方法如下:

  1. stats items

    得到所有的数据,例如:

    STAT items:2:number 322319
    STAT items:2:age 172801
    STAT items:2:evicted 0
    STAT items:2:evicted_nonzero 0
    STAT items:2:evicted_time 0
    STAT items:2:outofmemory 0
    STAT items:2:tailrepairs 0
    STAT items:2:reclaimed 2278852
    STAT items:2:expired_unfetched 2278852
    STAT items:2:evicted_unfetched 0
    STAT items:2:crawler_reclaimed 0
    STAT items:2:crawler_items_checked 0
    STAT items:2:lrutail_reflocked 0
    STAT items:3:number 2
    STAT items:3:age 4167
    STAT items:3:evicted 0
    STAT items:3:evicted_nonzero 0
    STAT items:3:evicted_time 0
    STAT items:3:outofmemory 0
    STAT items:3:tailrepairs 0
    STAT items:3:reclaimed 9
    STAT items:3:expired_unfetched 7
    STAT items:3:evicted_unfetched 0
    STAT items:3:crawler_reclaimed 0
    STAT items:3:crawler_items_checked 0
    STAT items:3:lrutail_reflocked 0
    STAT items:4:number 31
    STAT items:4:age 93448
    STAT items:4:evicted 0
    STAT items:4:evicted_nonzero 0
    STAT items:4:evicted_time 0
    STAT items:4:outofmemory 0
    STAT items:4:tailrepairs 0
    STAT items:4:reclaimed 5
    STAT items:4:expired_unfetched 5
    STAT items:4:evicted_unfetched 0
    STAT items:4:crawler_reclaimed 0
    STAT items:4:crawler_items_checked 0
    STAT items:4:lrutail_reflocked 0
  2. 假设要查看(items:3:number 2),即items 3,包含2个元素的keys,则执行: stats cachedump 3 2

    得到类似输出:

    stats cachedump 3 2
    ITEM aa340_7q544xyrava3vxf [55 b; 1702627086 s]
    ITEM aa340_3096861525888001 [51 b; 1702627086 s]
    END
  3. 上面dump出来的aa340_7q544xyrava3vxf就是key,取值只需要直接get即可。

参考资料

memcached查看所有的key


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