Dear Mark, I used only one server. I only change partitioner in configuration. The error is "key must be in order".
On Thu, Jan 7, 2010 at 6:45 AM, Mark Robson <mar...@gmail.com> wrote: > 2010/1/7 JKnight JKnight <beukni...@gmail.com> > > Dear all, >> >> Because we want to traverser all data, we need to change partitioner to >> ordered type. >> >> I want to change Partitioner from >> org.apache.cassandra.dht.RandomPartitioner to >> org.apache.cassandra.dht.OrderPreservingPartitioner. >> >> How can I do that? >> > > Well, start by prototyping the change in your test environment and checking > that with a large data load, the keys you're using are likely to get spread > evenly between the nodes (Hint: They probably won't). > > Then make any changes to get evenly spread keys. > > Of course changing the keys is an incompatible change as well. > > I hope you don't have any production data in there. > > Then blow away your entire data and restart the nodes with > OrderPreservingParitioner > > Mark > -- Best regards, JKnight