Cassandra代替Redis? – 后端技术 by Tim Yang



Cassandra代替Redis? – 后端技术 by Tim Yang

最近用Cassandra的又逐渐多了,除了之前的360案例,在月初的QCon Shanghai 2013 篱笆网也介绍了其使用案例。而这篇百万用户时尚分享网站feed系统扩展实践文章则提到了Fashiolista和Instagram从Redis迁移到Cassandra的案例。考虑到到目前仍然有不少网友在讨论Redis的用法问题,Redis是一个数据库、内存、还是Key value store?以及Redis和memcache在实际场景的抉择问题,因此简单谈下相关区别。

首先,Redis和Cassandra完全是适合不同的使用场景的NoSQL产品。前者是适用小规模内存型的key value或者key list数据,后者适合存储大规模数据。因此这篇文章提到切换主要原因或许还是前期Redis使用场景不合适,在初创公司项目初期,以顺手的工具快速实现功能的做法也可以理解。


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