This migration pattern provides step-by-step guidance for migrating an Amazon Relational Database Service (Amazon RDS) for Oracle database (DB) instance from one virtual private cloud (VPC) to another VPC in same Amazon Web Services (AWS) account. For example, you can use this pattern if your business requires that the database and the Amazon Elastic Compute Cloud (Amazon EC2) application server are in the same VPC.
The pattern describes an online migration strategy with almost no downtime for a multi-terabyte Oracle source database with a high number of transactions.
To move an Amazon RDS for Oracle DB instance to another VPC, you must change the Amazon RDS subnet group. This subnet group needs to be preconfigured with the new VPC and required subnets. During the VPC change from one network to another, the Amazon RDS instance reboots, so the database won't be accessible while the movement is in progress.
