John, If you are using leveldb as Riak's backend, keep in mind that each vnode requires a fixed amount of memory (set via max_open_files and cache_size in app.config). Recently had one user attempt too many vnodes on a 4Gbyte machine. He populated data to the point of memory overflow … then migration out of that mess took days.
Matthew On Oct 3, 2013, at 11:52 AM, John Kavanagh <j...@kavanista.com> wrote: > Thanks Sean ! > > > On Thu, Oct 3, 2013 at 4:33 PM, Sean Cribbs <s...@basho.com> wrote: > Hi John, > > Our rule-of-thumb is 8-64 partitions per physical node, so a good starting > point for a 6-node cluster would be 128 or 256. 256 will let you expand up to > about 30 nodes without needing a ring resize. > > > On Thu, Oct 3, 2013 at 10:14 AM, John Kavanagh <j...@kavanista.com> wrote: > Hi all, > > I'm trying to understand the optimal ring size / vnode config for a 6 node > Riak cluster, which will most likely expand to many more nodes over time . > Does everyone bump from the default of 64 to 1024 to facilitate future growth > ? I can provide more detailed capacity metrics off list if necessary. > > Thanks, > > John > > _______________________________________________ > riak-users mailing list > riak-users@lists.basho.com > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com > > > > > -- > Sean Cribbs <s...@basho.com> > Software Engineer > Basho Technologies, Inc. > http://basho.com/ > > _______________________________________________ > riak-users mailing list > riak-users@lists.basho.com > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
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