The difference between Redis and memcached (summary)

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.

The difference between Redis and memcached (summary)