4.6 Distributed-System Replication Architecture

1. What It Is - Replicas generally have two roles: Leader, responsible for handling client write requests; Follower, synchronizes data from the Leader and can handle client read requests. 2. Categories 2.1. Leader-Follower. 2.2. Leader-Leader. 2.3. Leaderless.

Distributed SystemsCreated 03/05/2022Updated 03/05/20221 min readhistorical

This is a historical learning note and may contain outdated or incomplete understanding.

1. What It Is

Replicas generally have two roles:
- Leader: responsible for handling client write requests.
- Follower: synchronizes data from the Leader and can handle client read requests.

2. Categories

3. Examples

MySQL supports Leader-Follower and Leader-Leader.
Redis supports Leader-Follower.
Kafka supports Leader-Follower.
ZooKeeper uses Leader-Follower.
Elasticsearch uses Leader-Follower.