Migrating an Oracle Database on EC2 to a New Region

Answer: C.

Option A is incorrect because it is possible to move EC2 instances from one region to another using AMI copy.

Option B is incorrect because read-replicas are the capability of Amazon RDS, not databases deployed to EC2.

Option C is CORRECT because to copy an EC2 instance from one region to another, you must first create an image from an existing EC2 instance, perform a copy of the image to a different region, and then create a new EC2 instance from that image.

To maintain system integrity, it is recommended to shut down the EC2 instance before creating an AMI.

Reference:

https://aws.amazon.com/premiumsupport/knowledge-center/move-ec2-instance/ https://aws.amazon.com/premiumsupport/knowledge-center/copy-ami-region/

Option A is not correct because it is possible to move an EC2 instance from one region to another, albeit not directly.

Option B is also not correct because it suggests using RDS, not EC2. RDS is a managed database service provided by AWS that automates many tasks such as backups, software patching, and monitoring. However, in this scenario, the database is deployed on EC2.

Option D is also not correct because it suggests configuring Multi-AZ for the database, which is a feature of RDS that provides high availability and data durability by replicating data to a standby instance in a different Availability Zone. However, in this scenario, the database is deployed on EC2.

Therefore, the correct answer is option C, which involves the following steps:

1. Shut down the Oracle database running on EC2.
2. Take an Amazon Machine Image (AMI) of the EC2 instance.
3. Copy the AMI to the destination region.
4. Launch a new EC2 instance in the destination region using the copied AMI.
5. Configure the necessary network settings, such as security groups and Elastic IP addresses, to ensure connectivity to the database.

It is important to note that the database administrator should verify that the database and any associated applications are functioning properly after the migration. Additionally, there may be additional considerations such as changing the DNS records and updating any external connections that were pointing to the old database instance.