multi-leader replication
Allow multiple write authorities with explicit conflict handling.
Use this when Disconnected sites or multiple regions need to accept writes.
without the term
“Both regions need to accept edits. Explain what happens when they update the same record while disconnected.”
with the term · How do you ask a model for multi-leader replication?
Evaluate multi-leader replication for these writers. Test conflicting updates and document the resolution rule.
What is multi-leader replication?
Multi-leader replication accepts writes at more than one leader and propagates changes between them. Products differ: some reconcile conflicts later, while coordinated multi-primary systems can reject conflicting transactions.
Why does multi-leader replication matter when vibe coding?
An agent can assume two successful local writes will merge without losing a business decision.
How do you do multi-leader replication?
Identify overlapping keys and constraints. Choose ownership or conflict rules. Test concurrent edits, retries, and recovery after disconnection for the selected product.
What goes wrong with multi-leader replication?
Last-write-wins can discard valid work; extra writers do not guarantee linear write scaling.
Sources for this entry
- MySQL: Multi-primary mode
Multiple writable members require conflict handling and have transaction and DDL restrictions.
- Amazon DynamoDB: Global tables
Multi-region replication has explicit eventual and strong consistency modes with different constraints.
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