Multileader Replication
Explore multileader replication, an advanced method allowing multiple leaders to handle writes simultaneously across data centers. Learn about different replication topologies—circular, star, and all-to-all—and their benefits and challenges. Understand common write conflicts and strategies for conflict avoidance and resolution, including techniques like last write wins and conflict-free replicated data types. This lesson equips you to manage complex distributed database replication scenarios efficiently.
Introduction
An extension of single-leader replication is multileader replication, which includes more than one leader receiving writes. This method is also called active-active replication.
In a multileader replication:
There are multiple leaders receiving writes.
Each leader simultaneously acts as a follower to other leaders.
The process of replication remains the same as single-leader replication.
Multileader replication finds its application in multi-data center setups that include a leader and followers in each data center. The client connects to the leader of a particular data center for write requests. Similarly, the client connects to the leader or followers of the data center to read data. Once the write request is successful in a data center, the leader asynchronously replicates the data to other data center leaders.
Replication topology
A multileader replication setup can have multiple data centers and poses challenges on how each data center leader should ...