Hi Dave, Thanks for your reply, and sorry, for not answering. I was quite busy.
> Gesendet: Dienstag, 9. Oktober 2007 08:39 > Betreff: Re: [BackupPC-users] How long does a normal Backup take? > > Ok, what I did now was a backup of localhost. Here, the > > network cannot be the bottleneck, and I can check the rest > > with vmstat, too. By the way: The Pool-Disk is dedicated an > > not the source disk for the backup. > > > > Here's the vmstat. I hope it's readable. > > procs ---------memory------ ---swap-- -----io--- -system-- ----cpu-- > > r b swpd free buff cache si so bi bo in cs us sy id wa > > 1 3 2816 6308 135036 228608 0 0 527 583 3027 4872 11 11 0 77 > > 0 3 2816 6236 134420 229588 0 0 779 281 2946 4755 18 12 0 70 > > 0 4 2816 5532 134820 229848 0 0 436 333 3906 4505 8 19 0 73 > > Here your system is primarily waiting on disk, see the high > IO wait time of ~70%? Also see the low bi/bo rates? That > indicates that the disks are seeking all over the place. Well, what surprises me is, that I can't hear it seeking... > You mentioned that one of the disks is running xfs. You can > check the fragmentation level by running: xfs_db -c frag -r /dev/hdXX The backuppc-data-disk runs reiserfs. (from fstab:/dev/hdb1 /mnt/data1 reiserfs noatime 1 2). The other data-partition (other disk) is xfs - and heavyly fragmented (56%). This shouldn't affect backuppc though. > If the fragmentation level is over 10%, it's worth > defragging, just run xfs_fsr which will defrag all mounted > xfs filesystems for 2 hours. > It's not a bad idea to run that periodically if you have xfs > partitions. Hm..., well the german wikipedia says, that this should never be neccessary. I'll do it anyway, although this should have nothing to do with the problem. > I seem to remember reiserfs having performance issues after > some time, especially if you happen to let the partition get > too full. How full are your partitions? /dev/hda5 94% /mnt/data <--xfs, not used by backuppc /dev/hdb1 99% /mnt/data1 <--reiserfs, backuppc > You should also check that each disk is running full speed by > running hdparm -tT /dev/hdX. You should be seeing at least > 30MB/s, probably > 40-50MB+. Well, it's just doing a backup and an emerge (xfs_fsr ;-) /dev/hda: Timing cached reads: 154 MB in 2.02 seconds = 76.18 MB/sec Timing buffered disk reads: 66 MB in 3.04 seconds = 21.72 MB/sec /dev/hdb: Timing cached reads: 144 MB in 2.00 seconds = 71.90 MB/sec Timing buffered disk reads: 60 MB in 3.00 seconds = 19.97 MB/sec Were you refering to the buffered or unbuffered speed? Greetings, Hendrik ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ BackupPC-users mailing list [email protected] List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
