What Are Replication Slots?

Replication slots are a feature of the MySQL server that allow multiple servers to share the same set of data. This is useful if you want to scale your MySQL server up or down, or if you have a load-balancer in place that can distribute the load across multiple servers.

Each replication slot is mapped to a specific server. When you create a new replication slot, MySQL automatically assigns it to the server that’s currently hosting your data.

If you need to move data between servers, you can use the replication slot assignment procedure to reassign the slots.

You can also use replication slots to mirror your data on multiple servers. Mirroring is useful if you need to provide high availability for your MySQL server.

When you mirror your data, MySQL copies all of your data across all of the replicas.

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