Simon Banton wrote: > > At 09:24 -0400 2/10/07, Ross S. W. Walker wrote: > >Actually the real-real fix was to use the 'deadline' or > 'noop' scheduler > >with this card as the default 'cfq' scheduler was designed > to work with > >a single drive and not a multiple drive RAID, so it acts as > a govenor on > >the amount of IO that a single process can send to the > device and when > >you do multiple overlapping IOs performance decreases instead of > >increases. > > Ah - that wasn't actually a complete fix Ross, but it did give a > noticeable improvement in certain situations. I'm still chasing a > real real 'general purpose' fix.
I was unaware of that. I thought changing schedulers did it. What is the recurring performance problem you are seeing? -Ross ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof. _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
