Re: Concurrency Control

2012-05-30 Thread Filipe Gonçalves
It's the timestamps provided in the columns that do concurrency control/conflict resolution. Basically, the newer timestamp wins. For counters I think there is no such mechanism (i.e. counter updates are not idempotent). From https://wiki.apache.org/cassandra/DataModel : All values are supplied

Concurrency Control

2012-05-28 Thread Helen
Hi, what kind of Concurrency Control Method is used in Cassandra? I found out so far that it's not done with the MVCC Method and that no vector clocks are being used. Thanks Helen