Il 01/09/2011 11:36, frank_sg ha scritto: > Hi, > > I am doing some tests about spooling. I have created a spool filesystem for > testing purposes. I decided to try a quiet small one - just 10 GB. Well, I > get an ugly perfomance (<10MB/s) with this one. So I assume that the spool > file system is too small - is this assumption right? > > To get a bigger spool fs, there might be some options: > 1) What is better: bigger spool fs or faster spool fs? So first option: 3,6 > TB RAID0 with 12 SAS disks direct attatched vs second option: 2 or 3 120 GB > SSDs? > 2) Does it make any sense to have a spool fs much bigger than the tape size? > (LTO4 - 800MB, with compression up to 1,6 TB - so does it make sense to use a > fs> 1,6 TB?) > 3) Specially with the SSDs - will I run in problems because of MTBF? Is > anybody using SSDs for spool fs? > > I have an autoloader with an SAS-LTO4 drive and I would like to get the drive > to steam as fast as possible. > > Thanks for you answers! > Regards, > Frank > > +---------------------------------------------------------------------- > |This was sent by f...@frankeseidel.de via Backup Central. > |Forward SPAM to ab...@backupcentral.com. > +---------------------------------------------------------------------- > > > > ------------------------------------------------------------------------------ > Special Offer -- Download ArcSight Logger for FREE! > Finally, a world-class log management solution at an even better > price-free! And you'll get a free "Love Thy Logs" t-shirt when you > download Logger. Secure your free ArcSight Logger TODAY! > http://p.sf.net/sfu/arcsisghtdev2dev > _______________________________________________ > Bacula-users mailing list > Bacula-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bacula-users
I'll add my 2 cents about spool filesystem size. IME the spool space gets emptied after every job run, so you need enough space just for the biggest job run you'll ever have, not for the entire tape. I'm not sure if this is a general rule or applies only to my setup though. About performance: to test the spool space performance I'd run some local disk benchmarks. Bacula job speed depends on so many other factors that it's almost impossible to use it as a benchmark for a single subsystem of the entire bacup process. In particular, look for bottlenecks at the client side: cpu, network and disk seek times. HTH. -- Marcello Romani ------------------------------------------------------------------------------ Special Offer -- Download ArcSight Logger for FREE! Finally, a world-class log management solution at an even better price-free! And you'll get a free "Love Thy Logs" t-shirt when you download Logger. Secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsisghtdev2dev _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
