I have a new LTO-4 library and LTO-3 tapes. I have changed the buffers around and I am using a 1MB block size. The best I have been able to get on a single client backup is 89MB/sec on a ~300GB backup to a LTO-3 tape.
I found that most of my clients max out at 25MB/sec. If backup 6 clients at a time/per tape drive I found that I had the smallest window so far. This would be from my catalog last night: FileSet: "Catalog" 2007-12-15 22:10:00 Pool: "Daily" (From Job resource) Storage: "Autochanger" (From Job resource) Scheduled time: 19-Dec-2007 22:10:00 Start time: 20-Dec-2007 07:53:46 End time: 20-Dec-2007 08:40:59 Elapsed time: 47 mins 13 secs Priority: 25 FD Files Written: 133 SD Files Written: 133 FD Bytes Written: 204,435,403,603 (204.4 GB) SD Bytes Written: 204,435,421,328 (204.4 GB) Rate: 72162.2 KB/s Software Compression: None VSS: no Encryption: no Volume name(s): AB8689L3|AP4125L3 Volume Session Id: 513 Volume Session Time: 1197472761 Last Volume Bytes: 441,911,430,144 (441.9 GB) I should have my 1st batch of LTO-4 tapes in a couple of weeks. (I am waiting on Custom labeled tapes). -Jason On Thu, 2007-12-20 at 18:05 +0100, Ralf Gross wrote: > Michael Galloway schrieb: > > out of curiosity, i'm wondering what other folks are getting for backup > > rates > > to LTO4. i seem to be getting these sorts of rates: > > > > local disk backups (3ware raid6 9650SE sata disks/xfs filesystem): > > Elapsed time: 8 hours 22 mins > > Priority: 10 > > FD Files Written: 432,602 > > SD Files Written: 432,602 > > FD Bytes Written: 1,038,925,243,806 (1.038 TB) > > SD Bytes Written: 1,038,995,304,809 (1.038 TB) > > Rate: 34492.9 KB/s > > > > linux client, (3ware sata raid 5, ext3): > > Elapsed time: 1 day 37 mins 15 secs > > Priority: 10 > > FD Files Written: 1,214,678 > > SD Files Written: 1,214,678 > > FD Bytes Written: 2,159,368,051,425 (2.159 TB) > > SD Bytes Written: 2,159,551,222,342 (2.159 TB) > > Rate: 24362.5 KB/s > > > > netapp client via nfs mount to bacula server: > > Elapsed time: 18 hours 1 min 56 secs > > Priority: 10 > > FD Files Written: 863,458 > > SD Files Written: 863,458 > > FD Bytes Written: 1,825,660,355,131 (1.825 TB) > > SD Bytes Written: 1,825,879,267,061 (1.825 TB) > > Rate: 28123.4 KB/s > > > > clients are all on local lan via gigE connections. > > For full backups I get 70-75MB/s write speed to LTO-4 tape. Spooling > seems to make not much difference here. The overall backup speed > (whole job) drops with spooling enabled, because it's asynchron for > single jobs (spooling -> despooling -> spooling...). Therefor I don't > use spooling for large jobs that run >20 hours. > > Are the above values with spooling or is this the 'Transfer rate' to > tape? > > Ralf > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2005. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Bacula-users mailing list > Bacula-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bacula-users -- ---------------------------------------------------------------------------- Jason A. Kates ([EMAIL PROTECTED]) Fax: 208-975-1514 Phone: 212-400-1670 x2 ============================================================================ ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users