doudh / jredis

redis rewrite in java

中文 english

HanboDB

redis of java implemented, as same as a redis server.

features

support dynamic resize support all of redis proto,e.g:

1.set get
2.lpush rpush lrange blpop brpop llen
3.hset hget hgetall hscan
4.pub sub
5.select keys scan expire del
6.multi exec discard
7.incr incrby
8.slaveof
....  

client side

compat jedis,spring-data-redis
compat redisDesktop management tool with v0.9+

architecture

used fastUtil library(Object2List,Object2Map) has a powerful read/write ability only keys be loaded in JVM heap

linear storage

1.fixed unit size ,head 4 byte write in last item position,
and then each item write in 4 byte with it bytes length and actually bytes(TLV).
2.key and value are seperated in storage
3.if buffer remaining not enough to write,then auto resize

build server

cd jredis && mvn clean install -Dmaven.test.skip=true

run server

java -jar transport-1.0-SNAPSHOT.jar

ha conf

support one master multi slave,but not support auto selective master,now need to manual promotion. i will plan to implement sentinel mechanism

master

auto discovery slave node

replication.mode=master

slave

auto register slave node

replication.mode=slave
slaver.of=127.0.0.1:16379