How to design for aws migitration from oracle database from onpremise to aws cloud using migitration service

Migrating an Oracle database from on-premises to AWS Cloud using AWS Database Migration Service (DMS) involves several steps and considerations. Here's a high-level overview of the process:

1. Prepare Your Environment:Ensure that you have an AWS account and access to AWS services.Set up the necessary IAM (Identity and Access Management) roles and permissions for DMS.
2. Database Assessment and Planning:Assess your existing Oracle database and its dependencies.Determine the appropriate AWS resources, instance types, and storage for your target database on AWS.Plan for data migration downtime or minimize it using strategies like database replication.
3. Network and Security Configuration:Set up Virtual Private Cloud (VPC) and networking configurations in AWS.Ensure that network connectivity is established between your on-premises Oracle database and AWS.
4. AWS DMS Configuration:Create an AWS DMS replication instance in your AWS account.Configure the source and target endpoints. The source endpoint will be your Oracle database, and the target endpoint will be your AWS database (e.g., Amazon RDS for Oracle, Amazon Aurora, or other compatible database engines).Define a replication instance class that meets your performance requirements.
5. Migration Task Creation:Create a migration task in AWS DMS. This task defines the source, target, and migration settings.Specify migration settings, such as table mappings, data transformations, and migration type (full load, CDC, or ongoing replication).
6. Data Migration:Start the migration task. AWS DMS will begin copying data from your on-premises Oracle database to the target database in AWS.Monitor the progress and health of the migration task using AWS DMS metrics and logs.
7. Validation and Testing:Validate the data in the target database to ensure it matches the source.Perform thorough testing to confirm that your applications can connect and function correctly with the AWS-hosted database.
8. Cutover and Downtime:Plan a cutover window during which you will stop writes to the source database and switch over to the AWS-hosted database.Minimize downtime by using strategies like Database Migration Service (DMS) for ongoing replication or by synchronizing the final changes.
9. Post-Migration Optimization:Optimize your AWS database instance for performance, scalability, and cost.Consider implementing high availability and disaster recovery solutions as needed.
10. Monitoring and Maintenance:Continuously monitor the health and performance of your AWS-hosted database.Implement regular backups, maintenance, and security best practices.
11. Documentation and Knowledge Transfer:Document the migration process and configurations for future reference.Train your team on managing and maintaining the AWS-hosted database.

Remember that database migration can be complex, and it's essential to thoroughly plan and test your migration strategy to minimize disruptions and ensure data integrity. AWS provides documentation and resources to assist with the migration process, and you may also consider engaging AWS Professional Services or consulting with an AWS Partner for more complex migrations

Creating a lab exercise for AWS migration from an on-premises Oracle database to AWS Cloud using AWS Database Migration Service (DMS) involves several steps and tasks. Below, I'll outline a lab exercise scenario that you can follow for this migration. Please note that this is a simplified version for educational purposes, and you may need to adapt it based on your specific requirements.

Lab Exercise: Oracle Database Migration to AWS Cloud

Objective: In this lab exercise, you will migrate an Oracle database from an on-premises environment to AWS Cloud using AWS Database Migration Service (DMS). You will perform a full-load migration of a sample database.

Prerequisites:

1. An AWS account with the necessary permissions for AWS DMS.
2. An on-premises Oracle database (or a sample Oracle database).
3. Familiarity with basic AWS concepts and Oracle Database.

Lab Steps:

Step 1: Set up AWS Environment

1. Log in to your AWS account.
2. Create an AWS VPC and configure necessary networking settings.
3. Set up IAM roles and permissions for DMS.

Step 2: Configure Source and Target Endpoints

1. Create a source endpoint for your on-premises Oracle database.
2. Create a target endpoint for your AWS database (e.g., Amazon RDS for Oracle).

Step 3: Create a Replication Instance

1. Create an AWS DMS replication instance.
2. Configure the instance based on your requirements.

Step 4: Create a Migration Task

1. Create a migration task in AWS DMS.
2. Define the source and target endpoints.
3. Specify migration settings (e.g., table mappings, transformation rules).
4. Configure the migration type as "Full Load."

Step 5: Start the Migration Task

1. Start the migration task in AWS DMS.
2. Monitor the progress of the migration using DMS metrics and logs.

Step 6: Validate the Migration

1. Validate that data is successfully copied to the target AWS database.
2. Ensure data integrity and consistency.
3. Perform basic queries and checks on the AWS database.

Step 7: Plan for Cutover and Downtime

1. Plan a cutover window during which you will stop writes to the source database.
2. Decide on the final synchronization steps.
3. Prepare for the cutover.

Step 8: Perform the Cutover

1. Execute the cutover steps to switch from the on-premises database to the AWS-hosted database.
2. Update application configurations to connect to the new database.

Step 9: Post-Migration Optimization

1. Optimize the AWS-hosted database for performance, scalability, and cost.
2. Implement high availability and disaster recovery solutions as needed.

Step 10: Monitor and Maintain

1. Continuously monitor the health and performance of the AWS-hosted database.
2. Schedule regular backups, maintenance, and security updates.

Step 11: Document the Migration

1. Create detailed documentation of the migration process and configurations.
2. Prepare a report summarizing the lab exercise and any issues encountered.

Lab Excerise for AWS DMS as mention in below

Step-by-Step Migration

PDF

The following steps provide instructions for migrating an Amazon RDS for Oracle database to an Amazon S3 data lake. These steps assume that you have already prepared your source database as described in previously.

Topics

• Step 1: Create an AWS DMS Replication Instance
• Step 2: Configure a Source Amazon RDS for Oracle Database
• Step 3: Create an AWS DMS Source Endpoint
• Step 4: Create a Target Amazon S3 Bucket
• Step 5: Configure an AWS DMS Target Endpoint
• Step 6: Create an AWS DMS Task
• Step 7: Run the AWS DMS Task

Conclusion: In this lab exercise, you successfully migrated an Oracle database from on-premises to AWS Cloud using AWS Database Migration Service. You gained hands-on experience with setting up AWS resources, configuring DMS, monitoring the migration, and post-migration tasks. This exercise provides you with valuable skills for real-world database migration scenarios.