Simon Matter wrote: >> On Mon, Nov 08, 2010 at 09:58:12PM -0500, Ashley Penney wrote: >>> One thing to consider is the 'nobarrier' option for ext4 - apparently >>> makes >>> a big performance difference. >> This is probably it. This was discussed ad infinitum when it was >> changed upstream, and caused a huge performance regression across >> pretty much every workload. > > But don't barriers affect mostly writes? If yes, is it because of the logs > and atime? 80% still looks like too much, maybe it's so bad because of the > virtualized environment?
Multiple posters keep trying to blame this performance discrepancy on the virtualized environment. This makes no sense. The original poster has stated that both systems used the same virtualized environment, thereby eliminating that as a source of variability. I believe the OP also said he tested on both configurations directly on the hardware with the same results. -- Prentice _______________________________________________ rhelv6-beta-list mailing list rhelv6-beta-list@redhat.com https://www.redhat.com/mailman/listinfo/rhelv6-beta-list
