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On 12/10/2013 06:24 PM, Kotwani, Mukul wrote:
> 2.6.18, not sure about the IO schedulers. The default scheduler
> could be different. Is the expected performance between the
> schedulers supposed to be that dramatically different?

I expect redhat didn't backport CFS to 2.6.18 -- that's the process
scheduler, not i/o. Whether it'd make a difference depends on your job
mix, of course.

But in general if it were centos/sl you could try installing kernel-ml
from elrepo and then running your comparison. If it's rhel: talk to
redhat (and they'll probably advise you to upgrade to 6.5 if not 7).

-- 
Dimitri Maziuk
Programmer/sysadmin
BioMagResBank, UW-Madison -- http://www.bmrb.wisc.edu

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