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请问替换策略是怎么样的？ #41

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salmonx opened this issue May 27, 2016 · 1 comment

salmonx commented May 27, 2016

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jfb8856606 commented Aug 29, 2016 •

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如果过期，则在下次请求时删除缓存。
如果未过期，但又有新的响应，则以原有的短TTL缓存为准（尤其是NS记录）
如果未过期，但本地缓存数量太多，则会进行清理，优先清理TTL剩余时间较短的缓存。
如果开始了缓存预刷新（默认代码中是开启的），则缓存TTL剩余3秒时，重新去请求该记录。

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