How do you do database migration?

8 Steps to Safely Migrate a Database Without Downtime

add a new dao to your app that writes to the “new” database.
start writing to the “new” database but use the “old” one as the primary.
enable the read path.
making the “new” database the primary one.
stop writing to the “old” database (read from both)

What are migration strategies?

6 Application Migration Strategies: “The 6 R’s”

Replatforming — I sometimes call this “lift-tinker-and-shift.”
Repurchasing — Moving to a different product.
Refactoring / Re-architecting — Re-imagining how the application is architected and developed, typically using cloud-native features.
Retire — Get rid of.

When should you migration a database?

Another common reason for migration is to move from an outdated system or legacy systems to a system that is designed for modern data needs. In the age of big data, new storage techniques are a necessity. For example, a company might choose to move from a legacy SQL database to a data lake or another flexible system.

What is database migration tool?

A database migration tool allows firms to transfer data from one type of database to another, or from a database to another type of data repository such as a data warehouse or data lake, without having to rely on manual coding or overly complicated ETL tools.

What is a migration in database?

Database migration is the process of migrating data from one or more source databases to one or more target databases by using a database migration service. When a migration is finished, the dataset in the source databases resides fully, though possibly restructured, in the target databases.

How do you validate database migration?

Here are 8 steps to follow in the data migration process.

Define the Scope.
Study requirements, Business Rules and Mapping Document.
Dependencies and Interactions.
Create Test Cases and Queries to Verify the Data.
Execute Test Cases.
Compare the Results.
Non-Functional Testing.
Functional Application Test.

What are the 3 R’s of migration strategy?

The R’s of Migration

Rehost.
Refactor.
Revise.
Rebuild.
Replace.

What are 7 R’s in cloud migration planning?

This data must be evaluated against the seven common migration strategies (7 Rs) for moving applications to the AWS Cloud. These strategies are refactor, replatform, repurchase, rehost, relocate, retain, and retire. For more information about the 7 Rs, see the 7 Rs entry in the AWS Prescriptive Guidance glossary.

What are the steps in data migration?

7 Steps to Include in your Data Migration Plan 1. Identify the data format, location, and sensitivity 2. Planning for the size and scope of the project 3. Backup all data 4. Assess staff and migration tool 5. Execution of the data migration plan 6. Testing of final system 7. Follow-up and maintenance of data migration plan

What are the challenges of data migration?

Data Loss. During the data migration process,data loss can occur.

Compatibility issues. There are also compatibility issues in data transfer,such as changed operating systems and unexpected file formats; or confusion over user access rights between the source and target

Poor execution impacts the business. Many IT departments decide to do a migration project in-house to save money,or the management team decides it for them.

What you should know about data migration?

Know Your Data. If you can’t already recite it in your sleep,be sure you understand how your particular system handles demographic data.

Maintain Your System And Your Data. Maintain your archive.

Beware Of Dependencies On Proprietary Features.

Start Early.

Migrate Before Go-Live.

Decide What You Need.

Vet Your Vendors.

What is data migration approach?

Data migration is the process of selecting, preparing, extracting, and transforming data and permanently transferring it from one computer storage system to another. Additionally, the validation of migrated data for completeness and the decommissioning of legacy data storage are considered part of the entire data migration process.