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AWS Database Migration Service
Step-by-Step Migration Guide (API Version 2016-01-01)

Step 7: Create an AWS DMS Replication Instance

After we validate the schema structure between source and target databases, as described preceding, we proceed to the core part of this walkthrough, which is the data migration. The following illustration shows a high-level view of the migration process.


                         AWS Database Migration Service migration process

A DMS replication instance performs the actual data migration between source and target. The replication instance also caches the transaction logs during the migration. How much CPU and memory capacity a replication instance has influences the overall time required for the migration.

To create an AWS DMS replication instance

  1. Sign in to the AWS Management Console, open the AWS DMS console at https://console.aws.amazon.com/dms/, and choose Create Migration. If you are signed in as an AWS Identity and Access Management (IAM) user, you must have the appropriate permissions to access AWS DMS. For more information on the permissions required, see IAM Permissions Needed to Use AWS DMS.

  2. Choose Create migration to start a database migration.

  3. On the Welcome page, choose Next.

  4. On the Create replication instance page, specify your replication instance information as shown following.

    For This Parameter Do This

    Name

    Type DMSdemo-repserver.

    Description

    Type a brief description, such as DMS demo replication server.

    Instance class

    Choose dms.t2.medium. This instance class is large enough to migrate a small set of tables.

    VPC

    Choose OracletoRedshiftusingDMS, which is the VPC that was created by the CloudFormation stack.

    Multi-AZ

    Choose No.

    Publicly accessible

    Leave this item selected.

  5. For the Advanced section, leave the default settings as they are, and choose Next.