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关于timeout时间设置方面,血的教训 #5

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@upbit

groupcache会经过如下3个时期:

  1. 从插入后到 expiration (秒)之间:Cache会一直生效;
  2. expirationstalePeriod 之间:先去load()数据,除非达到 staleDeadline 时直接返回Cache,其他优先用load()结果返回;load()后回填Cache;
  3. stalePeriod 之后:强制 load() 数据,无超时;

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