For more information about replication with Amazon Aurora, see the online documentation. Amazon Aurora replicas share the same underlying storage as the source instance, lowering costs and avoiding the need to copy data to the replica nodes. Amazon RDS replicates all databases in the source DB instance.Īmazon Aurora further extends the benefits of read replicas by employing an SSD-backed virtualized storage layer purpose-built for database workloads. Compatible with MySQL and PostgreSQL, Aurora can easily migrate MySQL or PostgreSQL databases and can transfer all exi. The read replica operates as a DB instance that allows only read-only connections applications can connect to a read replica just as they would to any DB instance. Reserved DB instances provide you with a significant discount compared to on-demand DB instance pricing. It then uses the engines' native asynchronous replication to update the read replica whenever there is a change to the source DB instance. PDF RSS Using reserved DB instances, you can reserve a DB instance for a one- or three-year term. Read replicas are available in Amazon RDS for MySQL, MariaDB, PostgreSQL, Oracle, and SQL Server as well as Amazon Aurora.įor the MySQL, MariaDB, PostgreSQL, Oracle, and SQL Server database engines, Amazon RDS creates a second DB instance using a snapshot of the source DB instance. Read replicas can also be promoted when needed to become standalone DB instances. You can create one or more replicas of a given source DB Instance and serve high-volume application read traffic from multiple copies of your data, thereby increasing aggregate read throughput. They make it easy to elastically scale out beyond the capacity constraints of a single DB instance for read-heavy database workloads. Amazon RDS Read Replicas provide enhanced performance and durability for Amazon RDS database (DB) instances.
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