Thanks very much Sam... much appreciated. On Fri, May 27, 2016 at 4:55 PM, Vikram Lalit <vikramla...@gmail.com> wrote:
> 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 >> >> >
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