README - Codis — ContextQMD

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Codis is a proxy based high performance Redis cluster solution written in Go. It is production-ready and widely used at wandoujia.com and many companies. You can see Codis Releases for latest and most stable realeases.

Donation

Donate if you want to help us maintaining this project. Thank you! See this issue for details

Compared with Twemproxy and Redis Cluster

<table> <tr><th></th><th>Codis</th><th>Twemproxy</th><th>Redis Cluster</th></tr> <tr><td>resharding without restarting cluster</td><td>Yes</td><td>No</td><td>Yes</td></tr> <tr><td>pipeline</td><td>Yes</td><td>Yes</td><td>No</td></tr> <tr><td>hash tags for multi-key operations</td><td>Yes</td><td>Yes</td><td>Yes</td></tr> <tr><td>multi-key operations while resharding</td><td>Yes</td><td>-</td><td>No(<a href="http://redis.io/topics/cluster-spec#multiple-keys-operations">details</a>)</td></tr> <tr><td>Redis clients supporting</td><td>Any clients</td><td>Any clients</td><td>Clients have to support cluster protocol</td></tr> </table> "Resharding" means migrating the data in one slot from one redis server to another, usually happens while increasing/decreasing the number of redis servers.

Other Features

GUI website dashboard & admin tools
Supports most of Redis commands, Fully compatible with Twemproxy(https://github.com/twitter/twemproxy)
Proxies can register on zk/etcd, clients can avoid dead proxies, see "High Availability" section.