Regis

• ping, get, set, mget, mset, select

• select, publish, subscribe, unsubscribe

• save, bgsave, del, dbsize

• RDB load, fake client

• RDB save

• list, but not compatibility with bgsave (need read copy)

• ring buffer (so easy)

• redis offset, part, full sync

• boot from conf and shell flags

• cascade master-slave

• slaveof, PSYNC

• master-slave reconnection

• set, zset, hash command

• info replication

• AOF

• master and slave

• sentinel

• cluster

• expire key

• string -> string

• list -> LinkedList

• hash -> Dict

• set -> Set

• zset -> SkipList