This recipe will show you how to create an RDS read-replica. You can use read-replicas in order to increase the performance of your application by off-loading database reads to a separate database instance. You can provision up to five read-replicas per source DB.
Read-only database slaves
You will need an RDS DB deployed with backup retention enabled. We are going to build upon the DB deployed in the previous Creating a database with automatic failover recipe.
You're going to need the following values:
- The identifier for your source RDS instance, for example,
eexocwv5k5kv5z - A unique identifier for the read-replicate we're going to create, for example,
read-replica-1
In the AWS CLI, type this command:
aws rds create-db-instance-read-replica \ --source-db-instance-identifier <source-db-identifier> \ --db-instance-identifier <unique-identifier-for-replica>