How replication works

Replication is the process of copying information to synchronize data across multiple computer storage points. It is used to increase data availability, fault tolerance, and load balancing. Here’s how it works in simple terms:

1. A primary node stores the original data. This is the master copy.
2. The primary node replicates the data to one or more secondary nodes. The secondary nodes receive the replicated data from the primary.
3. Anytime data changes on the primary node, those changes are replicated to the secondary nodes. This ensures the secondary nodes have an up-to-date copy of the data.
4. If the primary node fails, one of the secondary nodes can take over as the new primary. The failover process promotes a secondary node to become the new primary.
5. The new primary node will then replicate any new changes to the remaining secondary nodes to bring them back in sync.

So in summary, replication involves:

• A primary data store
• One or more secondary data stores
• The primary propagating changes to the secondaries to keep them synchronized
• The ability to fail over to a secondary node if the primary fails
• New changes being replicated from the new primary to bring all secondaries back in sync

This basic replication architecture provides data redundancy, high availability and fault tolerance. The secondary nodes act as a backup of the primary data in case the primary fails.

Hope this overview helps explain at a high level how replication works! Let me know if you have any other questions.

So, that’s all in this blog. I will meet you soon with next stuff .Have a nice day !!!

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