Re: Transaction/Locking Support

2010-10-20 Thread Aaron Morton
There are no transactions or locking in cassandra, if you want them you need to use Zookeeper or similar. Writes for a single mutation are atomic but  not isolated http://wiki.apache.org/cassandra/FAQ#batch_mutate_atomic More about consistency here http://wiki.apache.org/cassandra/ArchitectureOverv

Transaction/Locking Support

2010-10-20 Thread Wicked J
Hi, I'm trying to persist the contents of my app. objects to Cassandra. The objects in here are loosely modeled on key value (KV) stores. If the KV store is extended from HashMap and mapped to a ColumnFamily with put and get ops mapping to insert/read from Cassandra. Then my questions are: a) What