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From Chris Burroughs <chris.burrou...@gmail.com>
Subject Re: CL.ONE reads / RR / badness_threshold interaction
Date Wed, 13 Apr 2011 00:04:05 GMT
On 04/12/2011 06:27 PM, Peter Schuller wrote:
>> So to increase pinny-ness I'll further reduce RR chance and set a
>> badness threshold.  Thanks all.
> 
> Just be aware that, assuming I am not missing something, while this
> will indeed give you better cache locality under normal circumstances
> - once that "closest" node does go down, traffic will then go to a
> node which will have potentially zero cache hit rate on that data
> since all reads up to that point were taken by the node that just went
> down.
> 
> So it's not an obvious win depending.


Yeah there less than great behaviour when nodes are restarted or
otherwise go down with this configuration.  Probably still preferable
for my current situation.  Other's mileage may vary.


http://img27.imageshack.us/img27/85/cacherestart.png

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