CONTENTS

1. What is Raft ?
2. Appliacation ...
3. Let us Play it !

What is Raft?

• consensus algorithm
• equivalent to Paxos
• designed to be easy to understand

Raft User Study

Raft Overview

1. Leader election

   • Select one of the servers to act as cluster leader
   • Detect crashes, choose new leader

2. Log replication

   • Leader takes commands from clients, appends them to its log
   • Leader replicates it log to other servers

3. Safety

   • Only a server with an up-to-date log can become leader

Application

• Consensus algorithm
  • Paxos 、 Raft
• Consensus service
  • Zookeeper 、 etcd