<p>+1<br>
Which default? 100? A prime?</p>
<p>We should also make sure the CH function is optimized for this being on.<br>
</p>
<div class="gmail_quote">On Jan 26, 2012 8:12 PM, "Pete Muir" <<a href="mailto:pmuir@redhat.com">pmuir@redhat.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I think if we are confident it will benefit all, we should turn it on.<br>
<br>
On 26 Jan 2012, at 18:54, Mircea Markus wrote:<br>
<br>
> Hi,<br>
><br>
> 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.<br>
> 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.<br>
> So I think that increasing the default value would make sense. What are the drawbacks though? I'm thinking performance and HR wise...<br>
><br>
><br>
> [1] a random example of uneven distribution obtained with radargun<br>
><br>
> Cluster size: 4 -> ( 15505 13698 5918 4482)<br>
> Cluster size: 6 -> ( 8761 7820 17145 8188 12827 4183)<br>
> Cluster size: 8 -> ( 8391 6302 10773 22068 3589 200 3050 25211)<br>
><br>
><br>
><br>
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