一致性等级ConsistencyLevel
Configuring data consistency-官方文档Apache Cassandra™ 2.0
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ANY (0),
ONE (1),
TWO (2),
THREE (3),
QUORUM (4),
ALL (5),
LOCAL_QUORUM(6, true),
EACH_QUORUM (7),
SERIAL (8),
LOCAL_SERIAL(9),
LOCAL_ONE (10, true);
维护最终一致性
逆熵(Anti-Entropy) 读修复(Read Repair) 提示移交(Hinted Handoff) 分布式删除