Well, in my tests I have seen only a very slight improvement using the NOOP IO scheduler on an enterprise storage array. Usually around 1-3%.
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Domenico Viggiani Sent: Tuesday, October 20, 2009 4:33 PM To: 'Red Hat Enterprise Linux 5 (Tikanga) discussion mailing-list' Subject: RE: [rhelv5-list] IO Scheduler and RAID HW or SAN * F M wrote: > > Fo years I left the default setting of our HDs IO scheduler. After > reading some articles about HW RAID and SAN it seems to me that it is > not a good thing to let Linux doing IO scheduling because the HW > between him and the HDs have his own IO scheduler. > > I will probably run iozone to test with default and NOOP for example > but I am curious if someone has some toughts on that subject ? I know that usage of NOOP scheduler is sometime recommended for virtual machine hosting: http://kbase.redhat.com/faq/docs/DOC-5428 _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list
