RocksRaft

• 基于Raft一致性协议的分布式存储系统，参考阿里巴巴SOFAJRaft并使用Java从零实现。
• Distributed storage system based on Raft consistency protocol, referencing Alibaba SOFAJRaft and implemented from scratch using Java

Reference

• Alibaba SOFAJRaft

Related papers

• Graduation thesis of QUST in 2020 for bachelor's degree

Quick start

• Basic requirement
  • JDK 1.8+
  • IntelliJ idea
  • maven
• Clone project

git clone https://github.com/CoderiGenius/RocksRaft.git

• Import in to idea as maven project
• Config and start the example of 3 nodes scenario.
  • Config the three yml files in src/main/resources
  • Start the main function with files listed below
    • src/main/java/Start.java
    • src/main/java/Start2.java
    • src/main/java/Start3.java
• Wait until the nodes come up.
• Run the src/main/java/ClientExample.java
• You should be able to see the log of appendEnties and the procedures of applying to statemachine.
• Log example:

WARN:appendEntriesRequest CHECK:index 0 dataIsEmpty:false 
WARN:checkBallotBoxToApply applied:Voting currentIndex:0 length:1 stableLogIndex:0 
INFO:Ballot box invokes apply at index 0 length 1 with grant list [PeerId{endpoint=localhost:12220, checksum=0}, PeerId{endpoint=localhost:12230, checksum=0}]
INFO:doCommitted at 1 iterImpl:IteratorImpl [fsm=core.CustomStateMachine@22d116d, logManager=core.LogManagerImplNew@61295f0, currentIndex=1, committedIndex=1, currEntry=entity.LogEntry@ceafe80, applyingIndex=1, error=null,isGood=true] isGood:true
INFO:Apply to fsm at 1
INFO:Log 1 has been applied to stateMachine
INFO:Receive follower raft-3 applied  firstIndex :0 lastIndex:0
INFO:Receive follower raft-1 applied  firstIndex :0 lastIndex:0