Home | About | Sematext search-lucene.com search-hadoop.com
 Search Hadoop and all its subprojects:

Switch to Threaded View
HDFS, mail # user - Linux io scheduler


Copy link to this message
-
Re: Linux io scheduler
Patai Sangbutsarakum 2013-04-03, 17:25
Thanks Chris for response, I would love to try out. What would be the
metric(s) that we will be use to measure if we improve thing.?
On Tue, Apr 2, 2013 at 11:24 AM, Chris Embree <[EMAIL PROTECTED]> wrote:

> I assume your talking about the I/O scheduler.  Based on normal advice,
> only change this if you have a "smart" device between the OS and the
> Drives.  A SATA controller usually qualifies.  I have our DataNodes to to
> NOOP to reduce the number of layers.
>
> As always your mileage may vary and you should do some testing on your own.
>
>
> On Tue, Apr 2, 2013 at 1:59 PM, Patai Sangbutsarakum <
> [EMAIL PROTECTED]> wrote:
>
>> Hello Hadoopers,
>>
>> Is anyone ever play linux io scheduler configuration in worker nodes?
>> default for centos is cfq, there are 3 more to choose from.
>> I wonder if we can play with those scheduler, probably we might get
>> better performance ?
>>
>> hope this make sense.
>> Patai
>>
>
>