Migration strategies in Jenkins - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a 'Big Bang' migration strategy?

A 'Big Bang' migration means moving everything at once from the old system to the new system in a single event. It’s fast but risky because if something goes wrong, the whole system can be affected.

beginner

Explain the 'Phased' migration strategy.

Phased migration moves parts of the system step-by-step over time. This reduces risk because you can test each part before moving on to the next.

intermediate

What is the 'Parallel' migration strategy?

Parallel migration runs the old and new systems at the same time. This allows you to compare results and switch fully only when the new system works well.

beginner

Why is testing important during migration?

Testing ensures the new system works correctly and helps find problems early. It reduces the chance of failures after migration.

intermediate

How can Jenkins help in migration strategies?

Jenkins automates tasks like building, testing, and deploying code. It helps make migration smoother by running steps automatically and catching errors early.

Which migration strategy involves moving everything at once?

A Rollback

B Phased

C Parallel

D Big Bang

Big Bang migration moves all components at once in a single event.

What is a key benefit of the Phased migration strategy?

A Runs old and new systems together

B Lower risk by moving in steps

C Moves everything at once

D No testing needed

Phased migration reduces risk by moving parts step-by-step.

In Parallel migration, what happens?

A Migration is done in one step

B Only the new system runs

C Old and new systems run simultaneously

D Systems are merged

Parallel migration runs both systems at the same time to compare results.

How does Jenkins support migration?

A Automates build, test, and deploy steps

B Replaces the old system automatically

C Manually moves data

D Stops migration if errors occur

Jenkins automates key steps to make migration smoother and safer.

Why is testing critical during migration?

A To find and fix problems early

B To speed up migration

C To avoid using Jenkins

D To skip rollback steps

Testing helps catch issues early, reducing failures after migration.

Describe the main differences between Big Bang, Phased, and Parallel migration strategies.

Think about how much is moved and when.

Explain how Jenkins can improve the migration process.

Focus on automation and error reduction.