[Bug 210204] New: Poor XFS performance under 10.1 with many files
https://bugzilla.novell.com/show_bug.cgi?id=210204 Summary: Poor XFS performance under 10.1 with many files Product: SUSE Linux 10.1 Version: Final Platform: x86-64 OS/Version: Other Status: NEW Severity: Normal Priority: P5 - None Component: Basesystem AssignedTo: bnc-team-screening@forge.provo.novell.com ReportedBy: detlef@die-mafia.de QAContact: qa@suse.de I use xfs since SUSE 9.2, i'm very happy with good performance of xfs. But on 10.1, xfs has problems with write/read of many files. I setup my pc with SUSE 10.1 twice with all updates (incl new kernel-update), one with xfs and one with ext3, both on the same hd: samsung sata 160gb, SiI 3512 [SATALink/SATARaid] Serial ATA Controller. Test with big files: ext3: ----- time dd if=/dev/zero of=/build/testfile bs=1M count=1024 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 13.1206 seconds, 81.8 MB/s real 0m14.456s user 0m0.004s sys 0m3.276s time cp /build/testfile /build/testfile1 real 0m48.515s user 0m0.036s sys 0m3.948s time rm /build/* real 0m1.444s user 0m0.000s sys 0m0.436s xfs: ---- time dd if=/dev/zero of=/build/testfile bs=1M count=1024 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 12.3374 seconds, 87.0 MB/s real 0m12.417s user 0m0.000s sys 0m2.000s time cp /build/testfile /build/testfile1 real 0m43.686s user 0m0.048s sys 0m2.708s time rm /build/* real 0m0.206s user 0m0.000s sys 0m0.112s Ok, looks good, xfs is a little bit faster. But now test with y2pmbuild, many files in variable size. y2pmbuild have to create a fresch chroot in an empty directory. ext3: ----- time y2pmbuild knemo.spec real 3m29.911s user 1m31.446s sys 0m28.658s time rm -r /build/* real 0m5.533s user 0m0.036s sys 0m1.148s xfs: ---- time y2pmbuild knemo.spec real 7m27.520s user 1m31.230s sys 0m30.318s time rm -r /build/* real 2m3.613s user 0m0.036s sys 0m3.228s This looks not fine for xfs. :( -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is.
https://bugzilla.novell.com/show_bug.cgi?id=210204 aj@novell.com changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |WONTFIX ------- Comment #1 from aj@novell.com 2006-10-09 02:24 MST ------- Pleaes report this to the upstream XFS maintainers, there's not much we can do. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is.
https://bugzilla.novell.com/show_bug.cgi?id=210204 vapo@sgi.com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |vapo@sgi.com ------- Comment #2 from vapo@sgi.com 2006-10-09 23:48 MST ------- Assuming default XFS mount options for both SUSE 9.2 and SUSE 10.1, the write barrier support is enabled by default in XFS since 2.6.17 and this can explain the performance difference. Please refer to the XFS FAQ here: http://oss.sgi.com/projects/xfs/faq.html#wcache and try "-o nobarrier" mount option. Please also note that using this option may be dangerous as explained in the FAQ. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is.
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