Hi, in the past there was some discussion about what transfer rates can be reached with bacula and modern LTO-4 drives.
I've spend some time in tuning my setup. After changing the setup I can reach up to 130 MB/s with spooling from a 2 disk RAID0 and a few changes in my bacula-sd.conf. IIRC chainging 'Maximum File Size' gave me additional 20-30 MB/s. Each of the 3 LTO-4 drives has now its own 2 disk RAID0 for spooling. Only one job is writing to a tape at the same time. Our data is already compressed, 800-1000 GB fit on one tape. So the max. transfer rate of 100-130 MB/s is near the native LTO-4 speed. This is just to show that higher transfer rates can be reached with bacula. In previous posts the reported max. transfer rates were much lower (60-90 MB/s). Device { Name = ULTRIUM-TD4-D1 Drive Index = 0 Media Type = LTO4 Archive Device = /dev/ULTRIUM-TD4-D1 AutomaticMount = yes; AlwaysOpen = yes; RemovableMedia = yes; RandomAccess = no; AutoChanger = yes Maximum File Size = 5G Maximum Spool Size = 370g Maximum Job Spool Size = 20g Maximum Block Size = 262144 Maximum Network Buffer Size = 262144 Spool Directory = /bacula-spool-1 # # Enable the Alert command only if you have the mtx package loaded # # Note, apparently on some systems, tapeinfo resets the SCSI controller # # thus if you turn this on, make sure it does not reset your SCSI # # controller. I have never had any problems, and smartctl does # # not seem to cause such problems. # # # Alert Command = "sh -c 'tapeinfo -f %c |grep TapeAlert|cat'" # If you have smartctl, enable this, it has more info than tapeinfo Alert Command = "sh -c 'smartctl -d scsi -H -l error %c'" } Ralf ------------------------------------------------------------------------------ Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users