Hello, BackupPC uses *lots* and *lots* of hard links. The current Bacula implementation is *very* slow handling hard links. You have three choices: - Live with slow performance for BackupPC files - Turn off handling of hard links (your BackupPC files will all be restored but not properly linked). - Wait until a future version when I will correct the problem using hash coding of hard link names rather than a linear search.
On Tuesday 17 May 2005 14:52, Jeff Ramen wrote: > Hello, > I am experiencing slow backup performance, especially when backing up > my BackupPC pool to tape. > > My system: > Dual Opteron 2.4Ghz 1GB Ram, 4*300GB SATA (3Ware Controller RAID 5), > Adaptec U160 > Gentoo Linux (stage 1 install) kernel: linux-2.6.11-gentoo-r6 > BackupPC version 2.1.1, pool resides on LVM2 volume > Bacula version 1.36.3, MySQL store > HP Ultrium-1 LTO Tape > Exabyte VXA2 Autochanger > > To the LTO drive, I have seen as high as 12 Mb/s doing backups of > other volumes. > Backups of the backupPC pool are made from a snapshot, which is > created by a 'RunBeforeJob' script. > The last backup I ran (55GB of data) initially ran at around > 2-3Mb/sec, which is not great, but as long as the job gets done within > 4-6 hours I can deal. > What seems peculiar is that when the total bytes reaches 55GB (should > be everything) the job continues to run, for a long, long time. The > bytes does not change but the files examined value changes. See my > current job: > > Director connected at: 17-May-05 08:50 > JobId 3 Job BackupPC.2005-05-16_13.17.16 is running. > Backup Job started: 16-May-05 13:17 > Files=2,326,531 Bytes=55,852,725,733 Bytes/sec=793,734 > Files Examined=2,744,098 > Processing file: > /mnt/snapshot/backuppc/cpool/8/9/b/89ba699a9f1dde5a324a5f14ef626b77 > SDReadSeqNo=5 fd=7 > > So far a whopping 16 HOURS and still going! > > What's going on? I would like to get my tape backups working correctly > so I can start sleeping well again... > > - Jeff > > > > > > ------------------------------------------------------- > This SF.Net email is sponsored by Oracle Space Sweepstakes > Want to be the first software developer in space? > Enter now for the Oracle Space Sweepstakes! > http://ads.osdn.com/?ad_id=7412&alloc_id=16344&op=click > _______________________________________________ > Bacula-users mailing list > Bacula-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bacula-users -- Best regards, Kern ("> /\ V_V ------------------------------------------------------- This SF.Net email is sponsored by Oracle Space Sweepstakes Want to be the first software developer in space? Enter now for the Oracle Space Sweepstakes! http://ads.osdn.com/?ad_id=7412&alloc_id=16344&op=click _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
