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Practice 35AdvancedSystem designAbout 18 minutes

Corresponding knowledge: Structural and business compatibility during workflow upgrades

After the new version of the code goes online, can the old checkpoint be restored? How to migrate status?

Check workflow version, persistence state schema and playback compatibility.

Learn corresponding knowledgeInterview questions · Answer independently →
CheckpointSchema migrationpublish

Knowledge content check2026-10-03 · Check the source of the original question2026-10-02

The knowledge corresponding to this exercise:

Structural and business compatibility during workflow upgrades · Principle explanation →
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My notes and review ↗

Principles and Solutions have been collapsed. Explain the core mechanism, boundaries and verification methods in your own words, and then compare them.

Answers and personal notes

Each modified commit will be kept as an independent history. Your level of mastery is up to you to evaluate yourself against the standards.

Explain in your own words first

The core principles, analysis, Q&A and migration cases have been closed. When you are ready, unfold it and compare it with the content to find any omissions.

Hands-on verificationComplete on demand · Suggestions15 minutes

Split design v1 to v2 migration for waiting state, retaining original approvals and budget.

Expand acceptance requirements and checkpoints
  • Old snapshots can be traced back
  • Repeated migrations will not consume the budget repeatedly.
  • Undetermined status explicitly blocks

Key inspections

  • Know that persistence does not mean cross-version compatibility
  • Have a clear migration and old version strategy
  • Rollback takes into account data state