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Mongo、Redis、Memcached对比及知识总结 - 简书

 5 years ago
source link: https://www.jianshu.com/p/6e76d77166e4
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存储原理(持久化) MongoMongo的数据将会保存在底层文件系统,因此存储容量远大于redis和memcached。一个database中所有的collections以及索引信息会分散存储在多个数据文件中,即mongodb并没有像SQL数据库那样,每个表的数据、索引分别存储;数据分块的单位为extent(范围,区域),即一个data file中有多个extents组成,extent中可以...

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