Jason Voorhees schrieb: > > I got the biggest gain by changing "Maximum File Size" to 5 GB. How > > fast is the disk where you spool file is locatet? > > > > A different test would be to create a 10 GB file with data from > > /dev/urandom in the spool directory and the write this file to tape > > (eg. nst0). Note: this will overwrite your existing data on tape and > > you might have to release the drive in bacula. > > > > dd if=/spoolfile-directory/testfile of=/dev/nst0 bs=xxxk (your bacula block > > size) > > > > > > Ralf > > Ok, I made this: > [root@qsrpsbk1 spool]# dd if=/dev/urandom of=random.tst bs=1M count=10240 > > [root@qsrpsbk1 spool]# dd if=random.tst of=/dev/st0 bs=2048k count=5000 > 5000+0 records in > 5000+0 records out > 10485760000 bytes (10 GB) copied, 160.232 s, 65.4 MB/s > > The block size of 2048k is the same I'm using at Bacula Storage Daemon > configuration (Maximum Block Size = 2097152). Why the speed of dd was > 65 MB/s when my Despooling speed is about ~80-90 MB/s?
This is too slow. Try a block size of 256k with dd, this is what I use in bacula too. Or try different block sizes beginning by 64k to see how the speed changes. This are my SD settings. Maximum File Size = 5G Maximum Block Size = 262144 Maximum Network Buffer Size = 262144 > Well, these are my results of a bonnie++ test: > ... > Version 1.03e ------Sequential Output------ --Sequential Input- > --Random- > -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- > --Seeks-- > Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec > %CP > qsrpsbk1.qui 36200M 77100 96 108223 18 48701 7 77012 93 142733 > 8 681.7 0 > ------Sequential Create------ --------Random > Create-------- > -Create-- --Read--- -Delete-- -Create-- --Read--- > -Delete-- > files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec > %CP > 16 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ > +++ > qsrpsbk1.mydomain.com,36200M,77100,96,108223,18,48701,7,77012,93,142733,8,681.7,0,16,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++ > > > What do you think about these tests? This disk is too slow for spooling. Even with LTO4 you need a drive that is capable of stream the data with > 150 MB/s. I use a raid10 with 6 WD VelociRaptor drives. Ralf ------------------------------------------------------------------------------ WhatsUp Gold - Download Free Network Management Software The most intuitive, comprehensive, and cost-effective network management toolset available today. Delivers lowest initial acquisition cost and overall TCO of any competing solution. http://p.sf.net/sfu/whatsupgold-sd _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
