DCQUORUM is not finished in 0.6, which is why it's not documented there. If you want to test it you'll need to live on the bleeding edge of trunk (or wait for a 0.7 beta).
2010/5/28 Patricio Echagüe <[email protected]>: > Hi all, I need to help to understand how DCQUORUM works. > > This is my setup: > > - Cluster with 3 Cassandra Nodes > - RF = 3 > - ReplicatePlacementStrategy = RackUnawareStrategy > > My test: > - I write/read with DCQUORUM > > Results: > - While the 3 nodes are UP, all my writes and read succeed. (the nodes are > reached, and the third one -to complete the RF=3- is done my replication, > right?) > - When I killed one node, the test FAILED with UnavailableException > - When I performed the same test but with QUORUM instead of DCQUORUM, It > succeeded. > > Could someone explain please why reads and writes with DCQUORUM worked fine > while the 3 nodes were up and running but failed when 1 was down even thouch > I have only one Data Center? > > Thanks in advance > > -- > Patricio.- > -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of Riptano, the source for professional Cassandra support http://riptano.com
