Hi I thought I would do a real measurement to have some numbers. On my raid-1 ext3, extracting a kernel archive: benjamin@metis ~/software $ time tar xfj /usr/portage/distfiles/linux-2.6.38.tar.bz2 real 0m21.769s user 0m13.905s sys 0m1.751s On my root xfs root@metis ~ $ time tar xfj /usr/portage/distfiles/linux-2.6.38.tar.bz2 real 2m20.522s user 0m16.051s sys 0m3.147s This is of course with delaylog enabled. I don't think a difference of a factor 7 is normal, given that writing to a raid-0 (xfs numbers) is supposed to be faster than writing to raid-1 (ext3 numbers) Cheers Benjamin On 27.04.2011 00:12, Stan Hoeppner wrote: > Benjamin Schindler put forth on 4/26/2011 2:44 PM: >> Hi >> >> Since upgrading to newer kernels I have serious problems with xfs >> performance on my root fs. >> It runs on a software raid 0 with 2 disks. On the same two disks, there >> are two more partitions running a software raid-1 with ext3. On the ext3 >> system, I have no issue, so I assume the drives are fine. >> But on the xfs filesystem, extracting a linux kernel archive takes 5 >> minutes or more, running ldconfig similarily long. The harddrives are >> sata-2. >> I'm running gentoo linux with kernel 2.6.38-gentoo-r1. I'm attaching the >> kernel config but I guess more info is needed - just let me know what is >> needed. > > The kernel config isn't the problem. You haven't enabled the delayed > logging feature. Add 'delaylog' to your fstab mount options for XFS > devices, remount (or reboot if necessary) and it should decrease the run > time of kernel tar extractions between 10x and 100x. > > Also, slap yourself in the forehead at least 3 times for running your > root filesystem on RAID 0. That's akin to riding a motorcycle, naked, > in a blizzard, down a steep, winding, ice covered mountain road with no > guard rails and a 3000 ft drop. ;) > _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
