Hi Magnus, On Wed, Aug 10, 2016 at 9:21 AM, Magnus Kessler <mkess...@basho.com> wrote: > On 9 August 2016 at 15:42, Henning Verbeek <hankipa...@gmail.com> wrote: >> >> We're slowly migrating our application from Riak KV 1.4 to Riak KV >> 2.1.4, and at the same time riak-java-client 1.4.x to riak-java-client >> 2.0.6. We are doing this by adding seven new Riak KV 2.1 nodes to the >> ring, and later removing the seven Riak KV 1.4 nodes from the ring. >> For a few days, the cluster will consist of a mix. > > This plan will generate a lot of unnecessary data shuffling in the entire > cluster. Each time a node is added or removed from the ring, the claim > algorithm will re-assign partitions to/from all nodes. Please consider > updating the existing nodes in place.
Thanks. We anticipated that, and it's basically two ring changes (add all new nodes, remove all old nodes). The balancing takes about 12h for the 15TB or so to get redistributed. We've taken this opportunity to move our data onto newer, bigger machines that have become available at our hosting provider. Cheers, Henning _______________________________________________ riak-users mailing list riak-users@lists.basho.com http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
