redis 这种情况下需要批量查询吗? - V2EX
cheetah
V2EX    Redis

redis 这种情况下需要批量查询吗?

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  •   cheetah Jan 27, 2017 4848 views
    This topic created in 3396 days ago, the information mentioned may be changed or developed.

    比如我有一个页面,打开后需要查询 50 篇文章(依次 HGETALL ),然后还需要查询每篇文章对应的标签(依次 SMEMBERS ),这种情况下有必要把这些查询通过 MULTI 处理成批量的吗?还是说 redis 足够快,一次请求里有上百个查询也无所谓?

    5 replies    2017-01-30 15:47:00 +08:00
    zts1993
        1
    zts1993  
       Jan 27, 2017
    请求数量不是问题,看你每个请求的复杂度


    MULTI 没有太大必要吧,不要求原子的话,只用 pipeline 就够了。
    cheetah
        2
    cheetah  
    OP
       Jan 27, 2017
    @zts1993 就像上面说的,两种命令的复杂度都是 O(N)
    zts1993
        3
    zts1993  
       Jan 27, 2017
    @cheetah 要看看你 n 的量级咯。。。。
    neoblackcap
        4
    neoblackcap  
       Jan 27, 2017
    要我说,现在这个优化是没什么办法的,等今年 4.0 之后可能就能更进一步地优化。
    fyibmsd
        5
    fyibmsd  
       Jan 30, 2017
    需要,可以降低网络成本
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