Thanks Alexander ... makes complete sense... On Fri, May 27, 2016 at 4:39 PM, Alexander Sicular <sicul...@basho.com> wrote:
> There is a reason Basho's minimum production deployment recommendation is > 5 machines. It is to ensure that, when operating with default settings, > each replica of any key is stored on distinct physical nodes. It has to do > with the allocation of virtual nodes to physical machines and replica sets. > Replica sets are sets of virtual nodes, not physical nodes. > > When using 3 or 4 machines in your cluster reduce your n_val to 2. > > Cheers, Alexander > > On Friday, May 27, 2016, DeadZen <dead...@deadzen.com> wrote: > >> np, number of nodes and ring size play a lot into that. >> as does your r,w settings. >> might be fun to create a visualization one day ;) >> >> On Friday, May 27, 2016, Vikram Lalit <vikramla...@gmail.com> wrote: >> >>> Ok got it thanks. >>> On May 27, 2016 4:02 PM, "DeadZen" <dead...@deadzen.com> wrote: >>> >>>> reiterating my last email >>>> >>>> > theres no guarantee vnodes are assigned to unique servers.. >>>> >>>> referencing the docs >>>> >>>> > Nodes *attempt* to claim their partitions at intervals around the >>>> ring such that there is an even distribution amongst the member nodes and >>>> that no node is responsible for more than one replica of a key. >>>> >>>> >>>> >>>> On Friday, May 27, 2016, Vikram Lalit <vikramla...@gmail.com> wrote: >>>> >>>>> I have a Riak cluster (of 3 nodes, with 64 partitions and n_val = 3) >>>>> but I find that for some objects, their hosting partitions / vnodes are >>>>> not >>>>> spread out across the 3 nodes. In some cases, 2 of them are on 1 node and >>>>> the third is on a second node. That runs contrary to my understanding >>>>> (link >>>>> here: http://docs.basho.com/riak/kv/2.1.4/learn/concepts/clusters/) >>>>> that the data is spread out across partitions in such a way that the >>>>> partitions are on different servers. Is there something I'm missing here >>>>> please in terms of how Riak works? Thanks... >>>>> >>>>> > > -- > > > Alexander Sicular > Solutions Architect > Basho Technologies > 9175130679 > @siculars > >
_______________________________________________ riak-users mailing list riak-users@lists.basho.com http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
