分享一个 phper 比较容易踩到,导致服务负载不均,又不太好排查的坑。 - V2EX
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hulk

分享一个 phper 比较容易踩到,导致服务负载不均,又不太好排查的坑。

  •  
  •   hulk
    git-hulk Mar 27, 2016 3761 views
    This topic created in 3717 days ago, the information mentioned may be changed or developed.

    http://www.hulkdev.com/posts/getaddrinfo_cause_unbalance

    getaddrinfo 排序 DNS 返回的 ip 列表而导致服务负载不均匀。

    12 replies    2016-03-27 16:38:57 +08:00
    vibbow
        1
    vibbow  
       Mar 27, 2016
    难道不是应该打到 HAProxy 上,然后由 HAProxy 去做负载均衡么?
    hulk
        2
    hulk  
    OP
       Mar 27, 2016
    @vibbow 当前访问资源还是没有代理,后续考虑也应该是使用 twemproxy 或者 redis cluster 之类。
    Sunyanzi
        3
    Sunyanzi  
       Mar 27, 2016
    分享小故事 ... /t/46437#2 ...
    scourgen
        4
    scourgen  
       Mar 27, 2016
    图画的挺漂亮,是 Graphite 还是 Grafana ?
    julyclyde
        5
    julyclyde  
       Mar 27, 2016
    @Sunyanzi 前一半看着很像《道士下山》里的猿击术啊
    9hills
        6
    9hills  
       Mar 27, 2016 via iPhone
    @scourgen 像是 grafana

    DNS 可以手动 shuffle
    hulk
        7
    hulk  
    OP
       Mar 27, 2016 via iPhone
    @9hills 是的,可以手动。跟使用 gethostbyname 效果一样,最后就是这么建议的
    renzhn
        8
    renzhn  
       Mar 27, 2016
    喜欢楼主的文风
    aerostone
        9
    aerostone  
       Mar 27, 2016
    看来 php 之后就是 C 了
    Slienc7
        10
    Slienc7  
       Mar 27, 2016
    。。。 所以问题不应该是依靠 DNS 来实现负载均衡么。

    那个叫 DNS 论循( Round Robin DNS ),不是轮询( Polling)。
    Slienc7
        11
    Slienc7  
       Mar 27, 2016
    @xgowex ^轮循
    hulk
        12
    hulk  
    OP
       Mar 27, 2016 via iPhone
    @xgowex 多谢指正。文字乱用
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