http://wiki.apache.org/cassandra/Operations#Replication
2011/5/10 André-Philippe Paquet <andre-phili...@wajam.com>: > Hi, > > We have a cluster of ~20 nodes all located in 1 datacenter running Cassandra > 0.7.2. We are planning to move from this datacenter to another with as > minimal downtime as possible. > > The first strategy that came into my mind is to use the topology placement > strategy, create nodes in the new datacenter and let cassandra moves the data > into the new datacenter as we commission new nodes. The problem is that we > are currently using the RackUnawareStrategy placement strategy and I'm > wondering if it's possible to switch to the NetworkTopologyStrategy without > having to remake all the data. If so, how can I do it? > > As for the snitch, nodes are configured with RackInferringSnitch. I guess we > can let it there if we make sure nodes have properly configured IPs and > they'll snitch using the closest node? > > If switching the placement strategy is impossible, what is the best way to > move the data from one datacenter to the other? > > Thank you! > > Regards, > > André-Philippe Paquet > > > -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of DataStax, the source for professional Cassandra support http://www.datastax.com
