基于redis，一个类Kik应用的后台实现

1. 十分钟构建高性能微信后台 Twitter:Dcshi Sina:Dcshi 2011-03-31

2. Redis High-performance key-value store - Redis VS Memcache data structure server - strings, hashes, lists, sets and sorted sets Persistence -Snapshotting, Append-only file http://redis.io

3. Redis VS Memcache http://timyang.net/data/mcdb-tt-redis/ http://antirez.com/post/redis-memcached-benchmark.html

4. Webdis Providing an HTTP interface to Redis curl http://127.0.0.1:7379/SET/hello/world Base on libevent/libev High-performance 50,000 http requests per second on a desktop Flexible Json/jsonp…. ACL(Access control)

5. 微信是神马？

6. Mockup(A)

7. Mockup(B)

8. Connection Socket Tcp Udp 长连接： Comet Pub/Sub 轮询 Webdis

9. 轮询

10. Data Structure Friends list: Sorted Sets: - key : “friends:user_id” - val: (‘friend_id1’, friend_id2’,’ friend_id3’,…….) Messages: Lists: - key : “message:from_id:to_id” - value:[“time|url|content”, ”time|url|content”,..]

11. Operation Send a message: - Zincrby(http://redis.io/commands/zincrby) - Me +0 - friend +1 - Lpush(http://redis.io/commands/lpush)

12. Operation-mockup(A) 初始化页面: - Nick - Avata - Latest message(content + time) 检查未读消息数 curl http://localhost:7379/zrevrangebyscore/friends:user_id/+inf/1/withscores return{"zrevrangebyscore":[“62716","4",“71313","2"]}

13. Operation-mockup(B) 初始化页面 Lrange Zincrby 检查未读消息数 curl http://localhost:7379/zscore/message:user_id/friend_id Return {“zscore”:4}

14. Q&A