Hi Mojito, At the moment, changing the ring_creation_size parameter is not an easy process. It's important to choose a number that is large enough that you will not need to change it for a really long time. Projects will typically define an upper bound for a cluster's size based on available datacenter space, available power, cost, etc. Choosing a ring_creation_size value based on this upper bound will allow you to start small and grow into your cluster.
Changing the ring_creation_size, right now, requires building a new cluster with the new ring_creation_size value and migrating data from the old cluster (backup and restore). Thanks, Dan Daniel Reverri Developer Advocate Basho Technologies, Inc. d...@basho.com On Thu, Sep 30, 2010 at 5:01 PM, Mojito Sorbet <mojitot...@gmail.com> wrote: > What if your DB continues to grow beyond the original design size and > you need to add a lot more nodes? > > On Thu, 2010-09-30 at 16:34 -0700, Dan Reverri wrote: > > Yes, that is true. > > > > Daniel Reverri > > Developer Advocate > > Basho Technologies, Inc. > > d...@basho.com > > > > > > On Thu, Sep 30, 2010 at 4:27 PM, Alexander Sicular > > <sicul...@gmail.com> wrote: > > Dan, > > Is it true that "ring_creation_size" should only be altered at > > the creation of a cluster? Once you already have physical > > nodes in a cluster you shouldn't adjust the > > "ring_creation_size". True? > > > > > > Thanks, Alexander. > > > > > > > > @siculars on twitter > > http://siculars.posterous.com > > > > > > Sent from my iPhone > > > > > > On Sep 30, 2010, at 19:16, Dan Reverri <d...@basho.com> wrote: > > > > > > > > > Hi Michael, > > > > > > > > > There is no hard coded limit to the number of nodes that can > > > belong to a cluster. Depending on how quickly you are adding > > > nodes to the cluster you may be running into an issue with > > > the ring not converging on a single state. > > > > > > > > > Can you try using the "riak-admin ringready" command between > > > each join of a node? This command will return TRUE if the > > > nodes all agree on a particular ring state. You should run > > > this command until it returns TRUE after each join. > > > > > > > > > Also, Alexander is correct; you should deploy your nodes > > > with an increased value for the "ring_creation_size" > > > parameter in app.config. The typical recommendation is to > > > have a minimum of 10 partitions per node and the value > > > should be a power of 2 (64, 128, 256, 512, 1024). For a 63 > > > node cluster a value of 1024 would work well. > > > > > > > > > Thanks, > > > Dan > > > > > > Daniel Reverri > > > Developer Advocate > > > Basho Technologies, Inc. > > > d...@basho.com > > > > > > > > > On Thu, Sep 30, 2010 at 12:02 PM, Alexander Sicular > > > <sicul...@gmail.com> wrote: > > > The default vnode number is 64. If you are > > > connecting 63 physical nodes togeter in one riak > > > cluster than you really want to increase the number > > > of vnodes. There is some recommended metric for > > > physical nodes to vnodes. I think it's like a > > > minimum of 4 vnodes per physical node. But I could > > > be totally making that up. > > > > > > > > > -Alexander. > > > > > > > > > > > > @siculars on twitter > > > http://siculars.posterous.com > > > > > > > > > Sent from my iPhone > > > > > > > > > On Sep 30, 2010, at 14:26, Michael Colussi > > > <mcolu...@gmail.com> wrote: > > > > > > > > > > > > > Hey guys, > > > > > > > > > > > > My team was trying to launch a 63 node Riak > > > > cluster yesterday, using version 0.13rc3 and the > > > > bitcask backend. > > > > > > > > > > > > All 63 nodes agreed that the ring consisted of > > > > nodes 1-42 only. > > > > > > > > > > > > Any ideas? Is there a hardcoded limit to the > > > > number of nodes allowed? > > > > _______________________________________________ > > > > riak-users mailing list > > > > riak-users@lists.basho.com > > > > > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com > > > > > > > > > > _______________________________________________ > > > riak-users mailing list > > > riak-users@lists.basho.com > > > > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com > > > > > > > > > > > > _______________________________________________ > > > riak-users mailing list > > > riak-users@lists.basho.com > > > > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com > > > > > > > > > _______________________________________________ > > riak-users mailing list > > riak-users@lists.basho.com > > http://lists.basho.com/mailman/listinfo/riak-users_lists.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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