Moving data ownership
On This Lesson 4 topics
This lesson is planned. The outline below lists the topics it will cover. The full lesson has not been published yet.
In this lesson
transfer a dataset to a new service safely.
Planned topics
- Steps: copy (backfill), keep in sync one way, verify, switch the writer, stop the sync, remove old.
- Only one system writes at any time.
- Cut-over has a freeze or a version gate; plan the rollback data path.
- Verify with counts, checksums, and sampled comparisons.
Draft outline details
Demonstration
a phase table: P1 backfill, P2 one-way sync via CDC, P3 verify, P4 switch writer, P5 reverse sync window, P6 delete legacy tables.
Check your understanding
How many writers at any moment?
Show answer
One.
Practice
Apply this lesson with the module's lab, exercises and quiz.
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