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tuning the liveness check time of etcd pod #2108

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Commits on Aug 5, 2019

  1. tuning the liveness check time of etcd pod

    liveness probe needs to take care of the following steps' time:
    * time to transmit a 4GB snapshot from leader to member -- 4000MB / 50MB/s = 80s
    * time to load snapshot —— 4000MB / 200MB/s = 20s
    * time to set up streams and follow up leader revisions -- 100s * 10 heartbeat/s * 1KB/heartbeat / 1024KB/MB / 50MB/s ~= 20s
    
    total time -- 120s
    armstrongli authored and Li, Jianqiang committed Aug 5, 2019
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