On Thu, 2005-05-12 at 05:19, Nicolai E M Plum wrote: > Slartibartfast writes: > > I have bacula 1.34.2 running as Director, Storage and Client on a Pent > > IV 3Ghz running CentOS 3.4. > > > > Did fill tests with an Overland LoaderXpress LTO2 drive. The drive > > maxed at 27MB/s transfer rate. > > > > Same drive connected to a Sun v240 running Solaris 9 got 15MB/s. Same > > drive connected to a Sun v880 running Solaris 9 got 18MB/s. > > > > I have done full backups of 747GB on the v240 at an average 10.2MB/s > > onto one tape. ;) Just completing 1.15TB on the v880 at an average > > 11.5MB/s. > > > > So the question is... > > > > Am I missing something big on the Solaris platforms? I can't believe > > the 8proc v880 is getting smoked by a single proc Pent IV. > > > > Any suggestions welcome. > > Do you have a lot of sparse files and are you doing sparse file processing? > If so, it seems (based on one of my systems) that you can end up CPU-limited > as the bacula-fd goes through reading a lot of zeros as fast as it can.
Well the two backups are of Oracle database files which I've been told contain lots of whitespace. However I do not current have sparse file checking on. > > Other than that, do you have a lot of files on the Solaris machines, > particularly a lot of files in a single directory? Reading a lot of distinct > can noticeably slow down backups and I've noticed it on Solaris on > filesystems like webservers full of small image files or mail spools with > file-per-message filestores. The 747GB backup is of ~330 files, the 1.1TB backup was of 30000+ files. I don't know the makeup of the individual directories though. Ignoring the results of the two 'real' backups I'm wondering what would contribute to such low Solaris performance during the btape fill tests. ------------------------------------------------------- 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=7393&alloc_id=16281&op=click _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
