Slartibartfast> I have bacula 1.34.2 running as Director, Storage and Slartibartfast> Client on a Pent IV 3Ghz running CentOS 3.4.
Slartibartfast> Did fill tests with an Overland LoaderXpress LTO2 Slartibartfast> drive. The drive maxed at 27MB/s transfer rate. How did you do your fill tests? Just using 'dd' and a large input file? Slartibartfast> Same drive connected to a Sun v240 running Solaris 9 Slartibartfast> got 15MB/s. Same drive connected to a Sun v880 Slartibartfast> running Solaris 9 got 18MB/s. How are the drives connected? SCSI or FibreChannel? Which controllers are you using? More details please... Just on the offhand, I suspect that your using a SCSI connection from your SUNs to the LTO2 drive, but what speed are they negotiating? Check /var/adm/messages or 'dmesg' output. It's almost as if you have the wrong SCSI controllers on the SUN, and that's where the bottleneck is. Slartibartfast> I have done full backups of 747GB on the v240 at an Slartibartfast> average 10.2MB/s onto one tape. ;) Just completing Slartibartfast> 1.15TB on the v880 at an average 11.5MB/s. If you were only backing up 330 files for the 750gb backup, then you do have a bottleneck somewhere. Is the data local to the SUNs or is it being pulled over the network from another host? What kind of network do you have? 10mb/s is about what a 100baseT network can do, the theorectical max is 12.5mb/s. Slartibartfast> Am I missing something big on the Solaris platforms? Slartibartfast> I can't believe the 8proc v880 is getting smoked by a Slartibartfast> single proc Pent IV. It's not, I had a V880 with six LTO2 tape drives and I could push data at over 50mb/s to multiple drives at a time using Veritas NetBackup. But the data was local to the system on a FibreChannel disk array, the LTO2 were FibreChannel drives, etc. When is comes to backups, the entire chain that the data needs to flow through needs to be looked at, and just one choke point can make a big difference. Slartibartfast> Any suggestions welcome. Can you copy a large file to the V880 and just use: time dd if=/path/to/file bs=64k of=/dev/rmt/1cbn and see how the time changes for different bs= values? I seem to remember that going past 1m (using gnu dd) didn't make alot of difference, but I'd have to dig back into old email to find my results. Good luck, and give us some more info and I'm sure we'll be able to help. Jhon ------------------------------------------------------- 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 [email protected] https://lists.sourceforge.net/lists/listinfo/bacula-users
