On Sunday 04 March 2007 01:27, James Harper wrote: > Concurrent restores could become a bit more likely if we ever implement > client initiated restores though...
What you mention is a different case and not a problem, because Jörn is doing a restore of two simultaneous backups in a single restore job. Your case would be two separate restore jobs, which poses no problem other than one will wait if they are both trying to access the same device. In any case, the code to fix the problem already exists in bscan, if someone is feeling ambitious, but it isn't on *my* list of things to implement ... > > -----Original Message----- > From: "Kern Sibbald"<[EMAIL PROTECTED]> > Sent: 1/03/07 3:11:50 AM > To: > "bacula-users@lists.sourceforge.net"<bacula-users@lists.sourceforge.net>, > "[EMAIL PROTECTED]"<[EMAIL PROTECTED]> Subject: Re: > [Bacula-users] file size error when restoring multiple jobs > > On Wednesday 28 February 2007 15:46, Jörn Beutner wrote: > > Hello, > > > > I get the following error messages when I restore two backup > > jobs simultaneously: > > > > Error: attribs.c:409 File size of restored file /mnt/file1 not > > correct. Original 340517841, restored 151715840. > > Error: attribs.c:409 File size of restored file /mnt/file2 not > > correct. Original 283045352, restored 471781817. > > > > Each backup job contains only one file (job 1 contains /mnt/file1 > > and job 2 contains /mnt/file2). Both jobs share the same pool and the > > same file storage device and, that's important, are running > > simultaneously. Consequently the data of both backup jobs are stored > > in the same volume file. I use the bconsole to run the restore job > > and choose the option '3: Enter list of comma separated JobIds to > > select' and enter the jobids of the two backup jobs. > > > > If I restore each backup job separately no errors occur. The errors > > don't occur too, if I use data spooling for the backup. But that's > > not what I want. > > > > I've tested the bacula versions 1.38.11 and 2.0.2 with linux (SLES9, > > SLES10 and debian etch) on x86 and amd64 PCs. The test setup is based > > on the bacula example config files with some modifications for > > running concurrent backup jobs. The errors are allways the same. > > > > > > I get similar restore errors concerning the file size on my production > > system. I use a Qualstar tape library with two drives (AIT-3) and an > > autochanger. The daily backup consist of several jobs. Both drives > > are used for simultaneous backups but only one job writes to a drive > > at the same time (I've adjusted the parameters 'Maximum Concurrent > > Jobs' and 'Prefer Mounted Volumes' suitably). I have reduced the > > problem to the following setting: > > > > The first backup job contains one file which fills up one tape to 40%. > > The second backup job contains one file too, and it has the size of > > 120% of the tape capacity. I run both jobs simultaneously. The first > > job uses the first drive 1 with tape number 1, and the second job > > uses the second drive with the tape number 2. When the second job has > > filled the tape number 2, the autochanger changes the tape number 1 > > (which is allready partially filled with the data from job 1) to the > > second drive and the second jobs is finished. > > > > This mixture leads also to the allready mentioned restore problems. > > If I restore both backup jobs simultaneously with bconsole (only one > > drive is used for the restore) the size of the restored file from the > > second job is to small (about the size of the capacity of one tape), > > and the file from the first jobs is to large (about the size of the > > original file plus the missing part of the second job). If I run > > separated restore jobs (one for each backup job) everything is fine. > > > > > > Is this a bug, or do I need some special settings to avoid the > > discribed problems? > > Perhaps this is not well documented, but Bacula is not designed to restore > two jobs at the same time that were backed up simultaneously. If you have > spooling turned on and the whole job is spooled, you can restore two jobs > at the same time. However, if the spool does not hold the whole of each > job, you will have similar problems. > > I have never seen any need to do simultaneous restores of different jobs, > so what you are trying to do is "not supported". > > > Thanks, > > Joern > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share > your opinions on IT & business topics through brief surveys-and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Bacula-users mailing list > Bacula-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bacula-users > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share > your opinions on IT & business topics through brief surveys-and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Bacula-users mailing list > Bacula-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bacula-users ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
