I guess that updatedb thing reinforces my arguement about not seeing any mixed load tests. ext3 handles these situations pretty good, maybe XFS does not...
By the way, I read that EXT4 should allow for EXT3>EXT4 upgrades. One(of many) nice things about EXT4 is delayed writes which essentially means write re-ordering to mask/reduce I/O bottlenecks. Hopefully EXT4 will become stable pretty soon! On Sat, Dec 20, 2008 at 8:31 PM, Thomas Smith <thomat...@gmail.com> wrote: > Hi, > The server seems to be at a good level of performance now (1 hour and > 45 minutes), thank you all for your help! > > Retrospective, for people coming across this thread later and wanting > to fix backuppc xfs performance problems: > > To fix this problem, I set the noatime and nodiratime options on the > filesystem (I modified fstab and ran "mount -o > remount,noatime,nodiratime /var/lib/backuppc"). This cut the time in > half. I also noticed that updatedb was indexing the filesystem, and > stopping this cut the time by a further 80%. Updatedb had been > running under ext3, too, but hadn't slowed the FS down anywhere near > as much. I switched to XFS because I thought I would be making > archives a lot, then deleting them, and it took about 45 minutes to > delete some of these files on ext3 (some of them are 400GB or so). > But it turns out that I'm not doing this anyway, so if I had the > chance I would switch back, since under the rest of the load > conditions of backuppc, ext3 clearly performs better for me. > Unfortunately, it takes 2 or 3 days to do this switch, so it might not > happen for a while. > > Thanks again! > -Thomas > > On Sat, Dec 20, 2008 at 2:47 PM, dan <danden...@gmail.com> wrote: > > true enough. > > > > I have been doing a lot of expirimentation with opensolaris and zfs for > > backuppc. It is a bit of a pain getting backuppc working on opensolaris, > > specifically CPAN stuff. > > > > I am still in testing but ZFS seems to be an ideal filesystem for > > backuppc. SUN claims that it is essentially bulletproof. I want to see > for > > myself. I am now running this test setup on 10 seagate sata 7200.11 > disks > > in a single pool. I turn on light compression using lzof to maintain > > performance. This setup performs very very well and is in a raidz2 which > is > > similar to raid6. > > > > I still run ext3 on my primary backup server and wont be changeing that > > unless ZFS works out or ext4,btfs,tux3 get to market and are stable. > > > > On Sat, Dec 20, 2008 at 12:10 PM, Tino Schwarze <backuppc.li...@tisc.de> > > wrote: > >> > >> On Fri, Dec 19, 2008 at 10:13:08AM -0700, dan wrote: > >> > >> > If the disk usage is the same as before the pool, the issue isnt > >> > hardlinks > >> > not being maintained. I am not convinced that XFS is an ideal > >> > filesystem. > >> > I'm sure it has it's merits, but I have lost data on 3 filesystems > ever, > >> > FAT*, XFS and NTFS. I have never lost data on reiserfs3 or ext2,3. > >> > >> I've lost data on reiserfs, but it's been a while ago. I've been using > >> XFS for my BackupPC pool for about 2 years now and it's performance is > >> okay (the pool used to be reiserfs). Since I also changed hardware, I > >> cannot compare 1:1. Perceived performance of XFS vs. reiserfs is about > >> the same. > >> > >> > I say switch back to ext3. > >> > >> Which isn't that easy given a reasonably large BackuPC pool... > >> > >> Tino. > >> > >> -- > >> "What we nourish flourishes." - "Was wir nähren erblüht." > >> > >> www.lichtkreis-chemnitz.de > >> www.craniosacralzentrum.de > >> > >> > >> > ------------------------------------------------------------------------------ > >> _______________________________________________ > >> BackupPC-users mailing list > >> BackupPC-users@lists.sourceforge.net > >> List: https://lists.sourceforge.net/lists/listinfo/backuppc-users > >> Wiki: http://backuppc.wiki.sourceforge.net > >> Project: http://backuppc.sourceforge.net/ > > > > > > > ------------------------------------------------------------------------------ > > > > _______________________________________________ > > BackupPC-users mailing list > > BackupPC-users@lists.sourceforge.net > > List: https://lists.sourceforge.net/lists/listinfo/backuppc-users > > Wiki: http://backuppc.wiki.sourceforge.net > > Project: http://backuppc.sourceforge.net/ > > > > > > > > -- > http://resc.smugmug.com/ > > > ------------------------------------------------------------------------------ > _______________________________________________ > BackupPC-users mailing list > BackupPC-users@lists.sourceforge.net > List: https://lists.sourceforge.net/lists/listinfo/backuppc-users > Wiki: http://backuppc.wiki.sourceforge.net > Project: http://backuppc.sourceforge.net/ >
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