Database / BetterDB Interview questions
Explain the three-phase workflow of BetterDB Monitor's live migration?
Live migration moves data between Redis and Valkey through three distinct phases rather than a single blind copy.
The Analysis phase inspects the source and destination before touching anything – checking compatibility and data size so surprises show up before the move starts, not during it.
The Execution phase performs the actual data transfer.
The Validation phase then confirms that what landed on the destination genuinely matches the source, closing the loop so you have evidence the migration succeeded rather than just an assumption that it did.
Structuring it this way turns what could be a single risky, all-or-nothing dump-and-restore into three checkpoints an operator can review independently: you can stop after Analysis if the compatibility report raises concerns, and you can re-run Validation on its own if you want a second confirmation after the fact, rather than having to redo the entire move to double-check it.
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