Home | About | Sematext search-lucene.com search-hadoop.com
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB
 Search Hadoop and all its subprojects:

Switch to Plain View
HDFS >> mail # user >> Linux io scheduler


+
Patai Sangbutsarakum 2013-04-02, 17:59
+
Chris Embree 2013-04-02, 18:24
Copy link to this message
-
Re: Linux io scheduler
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
>>
>
>
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB