The difference between Redis and memcached (summary)

Redis and memcached are the two popular scenarios for distributed caching, and the contrast between them

	Redis	Memcached
Master-Slave function	Replication Support Primary and Standby automatic switching	Not natively supported, can be implemented by the client itself
Key-Value Consistency	Hash slots	Consistent Hash
Cluster	Server-side support (but beta version) unstable	Implemented by the client
Tool support	Provide your own tool (client Redis-cli,check-rdb ... ）	Weaker
Data storage	Support	No support, restart data loss

1. Redis and memcache all store data in memory, which is the memory database. But memcache can also be used to cache other things, such as films, videos and so on;

2, Redis not only supports simple k/v type data, but also provides storage of data structures such as List,set,hash;

3, virtual memory--redis when the physical memory is exhausted, you can swap some long-useless value to disk;

4. Expiration policy--memcache is specified when set, such as set Key1 0 0 8, which never expires. Redis can be set by example expire, for example expire name 10;

5, distributed-set memcache cluster, using Magent to do a master more from; Redis can do a master multi-slave. Can be one master one from;

6, storage data security--memcache hang up, the data is gone; Redis can be saved to disk (persistent) on a regular basis;

7, after the disaster recovery--memcache hangs, the data cannot restore; Redis data can be recovered by aof after loss;

8, Redis support data backup, that is, Master-slave mode of data backup;

9, the application scenario is different: Redis out as a NoSQL database use, but also used for Message Queuing, data stack and data cache; memcached is suitable for caching SQL statements, datasets, temporary user data, deferred query data, and session.

Turn from

Redis Walkthrough (8) Redis Cluster cluster Environment Installation-simple-51CTO technology Blog
http://dba10g.blog.51cto.com/764602/1851458

The difference between Redis and memcached (summary)-Timothy_lai-Blog Park
Http://www.cnblogs.com/timothy-lai/p/5786502.html

Memcached vs. Redis-Wang Daijun-Blog Park
Http://www.cnblogs.com/wangdaijun/p/6014928.html

The difference between Redis and memcached (summary)