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From "Jean-Daniel Cryans" <jdcry...@apache.org>
Subject Re: ext4 sweetness?
Date Sat, 10 Jan 2009 22:37:28 GMT
Ian,

We have Ubuntu server edition for our cluster so the deadline scheduler is
already what we use. Glad to know that I don't have to change that :P

J-D

On Sat, Jan 10, 2009 at 5:29 PM, Ian Holsman <lists@holsman.net> wrote:

> Jean-Daniel Cryans wrote:
>
>> Hey all,
>>
>> Has anybody tried some HBase pounding on ext4 from the new 2.6.28 kernel?
>> Steven from Computer World saw 30% boost in write speed with MySQL [1]. I
>> guess we should expect something like that too.
>>
>> J-D
>>
>>
>>
>
> Hi JD.
> you might also want to try experimenting with different I/O schedulers
> (moving it from the default CFQ to deadline for example).  I don't know how
> 'smart' hadoop is, but it could make a huge difference as well.
>
> see the bottom of
> http://www.mysqlperformanceblog.com/2008/12/18/xtradb-benchmarks-15x-gain/ for how much
of a effect it had in mysql benchmarks.
>
>  1. http://blogs.computerworld.com/linux_2_6_28s_five_best_features
>>
>>
>>
>
>

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