[infinispan-dev] default value for virtualNodes

[Sanne Grinovero]

+1
Which default? 100? A prime?

We should also make sure the CH function is optimized for this being on.
 On Jan 26, 2012 8:12 PM, "Pete Muir" <pmuir at redhat.com> wrote:

> I think if we are confident it will benefit all, we should turn it on.
>
> On 26 Jan 2012, at 18:54, Mircea Markus wrote:
>
> > Hi,
> >
> > ATM the default value for virtualNodes is 1. This means that the
> wheel-share each node has can be very uneven[1] for smalls(up to 15 nodes)
> clusters.
> > Increasing this value even to a small number(10-30) would significantly
> improve each node's share of wheel and the chance for a well balanced data
> distribution over the cluster.
> > So I think that increasing the default value would make sense. What are
> the drawbacks though? I'm thinking performance and HR wise...
> >
> >
> > [1] a random example of uneven distribution obtained with radargun
> >
> > Cluster size: 4 -> ( 15505 13698 5918 4482)
> > Cluster size: 6 -> ( 8761 7820 17145 8188 12827 4183)
> > Cluster size: 8 -> ( 8391 6302 10773 22068 3589 200 3050 25211)
> >
> >
> >
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>
>
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