Vnodes are a great feature. More nodes are involved during operations such as bootstrap, decommission, etc. DataStax documentation is definitely a must read. That said, If I were you, I'd wait somewhat before to shuffle the ring. I'd focus on cluster upgrade and monitoring the nodes. (number of files handles, memory usage, latency, etc). Upgrading from 0.8 to 1.2 can be tricky, there are so many changes since then. Be careful about compaction strategies you choose and double check the options.
Regards, Romain rash aroskar <rashmi.aros...@gmail.com> a écrit sur 25/07/2013 23:25:11 : > De : rash aroskar <rashmi.aros...@gmail.com> > A : user@cassandra.apache.org, > Date : 25/07/2013 23:25 > Objet : cassandra 1.2.5- virtual nodes (num_token) pros/cons? > > Hi, > I am upgrading my cassandra cluster from 0.8 to 1.2.5. > In cassandra 1.2.5 the 'num_token' attribute confuses me. > I understand that it distributes multiple tokens per node but I am > not clear how that is helpful for performance or load balancing. Can > anyone elaborate? has anyone used this feature and knows its > advantages/disadvantages? > > Thanks, > Rashmi
