Redis 坑

Redis @http://weibo.com/tangﬂ

Redis• disk backed in-memory database• support • k-v • hash • list • set (sorted set) • rdb/aof , master - slave

• int k-v 104 byte• • rediscounter • hash • hash-max-zipmap-size

• • rehash • get set • redis 48g 4 8g 2 18g 34g 8 13 08:27 iPhone• •

• • rehash • write aof• • • aof

• master -> slave • master dump rdb, and send to slave • master send every cmd to slave•• • • pos eRedis

• rdb • dump all data to disk • fork • •

• aof • append every write cmd to aof • long recover time • must bgrewrite from time to time • bgrewrite •

• • eRedis • rdb + aof with postion • write • write 2.4 rc8

• Java • server • jedis vs jredis • pool lifo=false block time etc • pool • HA

pipeline•

hgetAll•• mc cache

Thanks @http://weibo.com/tangﬂ

by fulin tang