On 01/17/2011 05:08 PM, Jonathan Ellis wrote: > 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. >
I made a big mistake in my Email! Sorry for the confusion. Of course the ReplicationFactor of the cluster is 3! (but the rest of the email is correct) >> 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. > I checked the existence of the row on the different serverver with sstablekeys after flushing. So I saw three copies of every key in the cluster. -- Sam
