Jonathan Ellis created CASSANDRA-5062:
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Summary: Support CAS
Key: CASSANDRA-5062
URL: https://issues.apache.org/jira/browse/CASSANDRA-5062
Project: Cassandra
Issue Type: New Feature
Components: API, Core
Reporter: Jonathan Ellis
Fix For: 2.0
"Strong" consistency is not enough to prevent race conditions. The classic
example is user account creation: we want to ensure usernames are unique, so we
only want to signal account creation success if nobody else has created the
account yet. But naive read-then-write allows clients to race and both think
they have a green light to create.
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