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LevelDB：Compaction - 简书
source link: https://www.jianshu.com/p/527c3a00f79e?
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农历新年的最后一天，趁着假期看看代码，顺便做点笔记。时间上比较仓促，如有问题/疑问，欢迎指出。 简介 LevelDB 的写操作是 Append-Only 的，新的数据写入后，相应的旧数据就过期了。过期的数据需要被 Garbage Collection，不然数据文件的体积会持续膨胀，这是不可接受的。 LevelDB 通过后台线程的 compation 来对过期数据进行 Garbage Coll...
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