On Mon, Jan 17, 2011 at 9:55 AM, Samuel Benz <samuel.b...@switch.ch> wrote: > We have a cluster with 4 nodes. ReplicationFactor is 2, ReplicaPlacment > is the RackAwareStrategy and the EndpointSnitch is the > PropertyFileEndpointSnitch (with two data center and two racks each). > > My understanding is, that with this parameter of the cluster, it should > be possible to update with consistency level quorum while one data > center (two nodes) are shutdown completely.
No. Quorum of 2 is 2. > Case1: > If 'TEST' was previous stored on Node1, Node2, Node3 -> The update will > succeed. > > Case2: > If 'TEST' was previous stored on Node2, Node3, Node4 -> The update will > not work. If you have RF=2 then it will be stored on 2 nodes, not 3. I think this is the source of the confusion. -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of Riptano, the source for professional Cassandra support http://riptano.com
