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If a partition leaves a quorum in contact with each other, why would it cause an interruption? CP means nodes not within a quorum become unavailable, and if a q
by prodigal_erik 10y ago
If a partition leaves a quorum in contact with each other, why would it cause an interruption? CP means nodes not within a quorum become unavailable, and if a quorum no longer exists the whole system is unavailable. AP means minorities stay available at the risk of inconsistency.
- falcolas 10y ago> If a partition leaves a quorum in contact with each other, why would it cause an interruption? You can have a split that still has a group of machines with quorum: a 3/2 split would leave three nodes with quorum, and two without. Clients which attach to the non-quorum machines would lose the ability to read or write if it's CP, yet the clients connected to the quorum machines would retain the ability to read and write. So it would be a partial outage, until some way is found to identify quorum members and route clients back to that quorum (making the assumption that clients could talk to any node in a partition).