Hi Mario, On Mon, 2 Jul 2012, Mario Moder wrote: > On the search for bottlenecks in our new backup system (Bacula 5.2.10 on > Ubuntu 12.04 64bit, HP Ultrium LTO-5 drive connected by Adaptec 1045 > external SAS, File pool storage on iSCSI target) I ran the "speed" tests > with "btape /dev/nst0" because the backups from local disk spool to tape > only run with 70-80 MB/s.
We use a similar setup: Bacula 5.2.X on Scientific Linux 6.2 64-Bit with Dell TL4000 Tape Library - two LTO-5 drives (IBM ULT3580-HH5) > What I don't understand is the result of the next two tests (with bacula > block structure): > > - Fastest zero test (4.294 GB): 84.21 MB/s > - Fastest random data test (4.294 GB): 81.03 MB/s > We got higher rates with btape test, zero 12 GByte with 121 MByte/s and random 12 GBytes with 106.4 MByte/s, but with a real backup job we don't hit more than 85 MByte/s. We use dataspool to local 15k SAS drives to feed the tape drive. Do you have real backup job throughput rates? btape output: http://pastebin.ca/2167291 Best Regards, - Jummo ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
