Hi, On 3/20/2007 3:54 PM, [EMAIL PROTECTED] wrote: > Hi, > > I would like to use bacula for backup, but the observed perfomance is > not good enough for our use case. > The backup-server running Director, SD and FD (version 1.38.11 on > Debian unstable) is an AMD Athlon(tm) XP 1500+ with 1 GB of ram. > It reads the files via Gbit-ethernet from an NFS-share. > The storage device is an autochanger-library with an HP Ultrium-3 > tape drive, which is attached to the server via an Adaptec > AIC-7892A U160/m-SCSI-card.
I'd do some tests: Measure the network throughput, disk throughput (in case you want to use spooling, which I recommend) and tape throughput. I suspect that, given your hardware, you will find that neither the network nor the disk is fast enough to allow continous streaming to tape. > The problem is, that Bacula in a test run gives a rate of upto 18MB/s > with a single large file served from NFS. Backing up approx. 7,5 > million files with a total size of 920GB brings down the rate to > approx. 6MB/s (md5 signatures and no spooling). Measuring NFS throughput with your actual fileset will probably result in a rather unimpressive result... it might be better to have an FD running on your NFS server, if possible. If you've got some sort of small NAS system that will not be possible, and these things are usually not known for their exceptional performance. > I can hardly estimate if this is good or bad. For backup purposes, that's not good. Depending on your hardware, it might be the best you can achieve. If you're really stuck with that hardware, I'd strongly suggest to use spooling through an extra disk, preferrably a fast one on a dedicated controller. PCI throughput will limit what you can achieve anyway. > Well, I know, that a rate of 6 MB/s is to slow by a factor of 3 to 4 > for our goal of backing up 1-1.5TB in less than 20hours. > > I'm sure, that I should upgrade the hardware to get more performance, > but before doing so, I would like to hear from others, > what hardware they use for backup, how their setup is and which > backup rates they achieve. You don't want to know about my office / testing setup :-) but, to saturate an LTO-3 drive, you'll need really good bus throughput (PCI-X or PCIe) and a fast spooling disk. I'd recommend a fast stripe set as a spooling disk. Dual Xeon or Opteron systems are a good starting point today, because when using a local catalog database your database doesn't block the CPU for Bacula, at least. Arno > > Bye, > Sven > > > > "Jetzt Handykosten senken mit klarmobil - 14 Ct./Min.! Hier klicken" > http://www.klarmobil.de/index.html?pid=73025 > > > ------------------------------------------------------------------------- > 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 -- IT-Service Lehmann [EMAIL PROTECTED] Arno Lehmann http://www.its-lehmann.de ------------------------------------------------------------------------- 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
