[CASSANDRA-2338] C* consistency level needs to be pluggable

• Type: New Feature
• Status: Resolved
• Priority: Low
• Resolution: Won't Fix
• Assignee: Unassigned
• Reporter: Matthew F. Dennis
• Created: 16/Mar/11 03:32
• Updated: 16/Apr/19 09:33
• Resolved: 03/Dec/13 14:46

Description

for cases where people want to run C* across multiple DCs for disaster recovery et cetera where normal operations only happen in the first DC (e.g. no writes/reads happen in the remove DC under normal operation) neither LOCAL_QUORUM or EACH_QUORUM really suffices.

Consider the case with RF of DC1:3 DC2:2

LOCAL_QUORUM doesn't provide any guarantee that data is in the remote DC.

EACH_QUORUM requires that both nodes in the remote DC are up.

It would be useful in some situations to be able to specify a strategy where LOCAL_QUORUM is used for the local DC and at least one in a remote DC (and/or at least in each remote DC).

Issue Links

• relates to: CASSANDRA-8119 More Expressive Consistency Levels