On 5/7/2011 7:33 PM, Dave Chinner wrote:
On Sat, May 07, 2011 at 12:09:46PM -0400, Justin Piszcz wrote:Hello, Using 2.6.38.4 on two hosts: Host 1: $ /usr/bin/time find geocities.data 1> /dev/null 80.92user 417.93system 2:19:07elapsed 5%CPU (0avgtext+0avgdata 105520maxresident)k 0inputs+0outputs (0major+73373minor)pagefaults 0swaps # xfs_db -c frag -f /dev/sda1 actual 40203982, ideal 40088075, fragmentation factor 0.29% meta-data=/dev/sda1 isize=256 agcount=44, agsize=268435455 blks = sectsz=512 attr=2 data = bsize=4096 blocks=11718704640, imaxpct=5 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 log =internal bsize=4096 blocks=521728, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 -- Host 2: $ /usr/bin/time find geocities.data 1>/dev/null 54.60user 337.20system 48:42.71elapsed 13%CPU (0avgtext+0avgdata 105632maxresident)k 0inputs+0outputs (1major+72981minor)pagefaults 0swaps # xfs_db -c frag -f /dev/sdb1 actual 37998306, ideal 37939331, fragmentation factor 0.16% meta-data=/dev/sdb1 isize=256 agcount=10, agsize=268435455 blks = sectsz=512 attr=2 data = bsize=4096 blocks=2441379328, imaxpct=5 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 log =internal bsize=4096 blocks=521728, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0
How much would it help, if any, with this specific 'test', or with overall XFS performance, if Justin were to...
Host 1: RAID-6 (7200 RPM Drives, 18+1 hot spare)
remake the fs on the above device with 'sw=16' or remount with appropriate sunit and swidth values?
Host 2: RAID-6 (7200 RPM Drives, 12)
remake the fs on the above device with 'sw=10' or remount with appropriate sunit and swidth values?
-- Stan _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
