[CASSANDRA-300] Enumerate useful consistency options for read/write calls

• Type: Improvement
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 0.4
• Assignee: Sammy Yu
• Reporter: Michael Greene

Authors

Sammy Yu

• Created: 16/Jul/09 19:34
• Updated: 16/Apr/19 09:33
• Resolved: 27/Jul/09 21:44

Description

Currently, a user has to specify an int for the number of nodes to block_for. As discussed on IRC, there are only a few options that a user would want, so this would be better encapsulated by an enum.

enum ConsistencyLevel {
ZERO = 0,
ONE = 1,
QUORUM = 2,
ALL = 3,
}

This could be extended with a fifth option, CUSTOM = 4, if custom specifications are desired
struct ConsistencyRequest {
1: required ConsistencyLevel level,
2: optional int nodes
}

Issue Links

• depends upon: CASSANDRA-232 Interface does not allow specification of weak vs quorum reads