If I understand your correctly, you just want to add 8 nodes to a ring that already has 2 ?
You could add the nodes and manually assign them tokens following the guidelines here http://wiki.apache.org/cassandra/Operations I'm not sure how to ensure the minimum amount of data transfer though. Adding all 8 at once is probably a bad idea. How about you make a new cluster of 8 nodes, manually assign tokens and then copy the data from the 2 node ring to the 8 node. Then move the 2 original nodes into the new cluster? Hope that helps. Aaron On 10 Nov 2010, at 20:56, Jean-Yves LEBLEU wrote: > Hello all, > > We have an installation of 10 nodes, and we choose to deploy 5 rings of 2 > nodes. > > We would like to change to a ring of 10 nodes. > > Some data have to be replicated on the 10 nodes, some should stay on 2 nodes. > Do you have any idea or documentation pointer in order to have a ring of 10 > nodes with such data repartition ? > > Thanks for any answer. > > Jean-Yves
