The reason why counters work is that addition is commutative, i.e. x + y = y + x
but deletes are not commutative, i.e. x + delete ≠ delete + x so the result depends on the order in which the messages arrive. 2011/9/21 Radim Kolar <h...@sendmail.cz> > Dne 21.9.2011 12:07, aaron morton napsal(a): > > see technical limitations for deleting counters http://wiki.apache.org/** >> cassandra/Counters <http://wiki.apache.org/cassandra/Counters> >> > For instance, if you issue very quickly the sequence "increment, remove, > increment" it is possible for the removal to be lost (if for some reason the > remove happens to be the last received messages). > > But i do not remove then very quickly. it does that even with 60 seconds > between delete and increment. I do not understand what means: "remove > happens to be the last received messages". >
