From: Arno L. <al...@it...> - 2006-01-31 21:04:58
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Hi, On 1/31/2006 5:42 PM, Ryan Novosielski wrote: > Ah! Never even occurred to me. > > Is there ANY way to get the tape head speed, other than attempting to do > it mathematically? not completely without matematics... but when you look into the job reports, you'll notice that they give time and an event description like this: > 31-Jan 16:25 goblin-dir: RunBefore: Saving Mail... > 31-Jan 16:25 goblin-dir: Start Backup JobId 4986, Job=BackupMail.2006-01-31_16.25.34 > 31-Jan 16:25 goblin-sd: Volume "QIC-525-0001" previously written, moving to end of data. > 31-Jan 16:48 goblin-sd: Ready to append to end of Volume "QIC-525-0001" at file=10. > 31-Jan 16:48 goblin-sd: Spooling data ... > 31-Jan 16:53 goblin-sd: Committing spooled data to Volume "QIC-525-0001". Despooling 26,363,327 bytes ... > 31-Jan 16:56 goblin-sd: Sending spooled attrs to the Director. Despooling 429,032 bytes ... > 31-Jan 16:57 elf-fd: ClientRunAfterJob: Temporary mail backup files removed. In the above example, you see the interesting parts: 16:25-16:48: tape ff'ing 16:48-16:53: spooling, 5 minutes 16:53-16:56: writing, 3 minutes 16:56-16:57: despooling attributes, 1 minute And: > SD Bytes Written: 25,086,029 > Rate: 12.7 KB/s Tape speed can be calculated: 24.5M / 180s = 136 kB/s (approx., due to the low timer resolution...). The overall rate Bacula reports seems to include the time to since job start, i.e. including time to forward the tape etc. And yes, that tape drive is *slow*. Arno > ---- _ _ _ _ ___ _ _ _ > |Y#| | | |\/| | \ |\ | | | Ryan Novosielski - User Support Spec. III > |$&| |__| | | |__/ | \| _| | nov...@um... - 973/972.0922 (2-0922) > \__/ Univ. of Med. and Dent.| IST/AST - NJMS Medical Science Bldg - C630 > > > Steve Loughran wrote: > >> IHi Ryan >> >> ts because the data is being transferred twice, once from client to >> the spool area , then again from the spool area to $TAPE. From a >> backup point of view, its taken longer to backup the same amount of data. >> >> What would be nice is two separate values, one for spool data rate and >> one for write-to-device data rate. >> >> Steve >> >> >> Ryan Novosielski wrote: >> >>> So, I have switched to spooling, on the advice I've seen written >>> recently... sounds like the way to go, especially if you only have >>> one tape drive. I expected a speed increase too, as the drive would >>> be used more efficiently. What I did not expect is the 1000Kps speed >>> DECREASE. Can anyone tell me why this might be? This is a Solaris 9, >>> Sun UE450 box, 3x296 with a DAT72 drive. >>> >>> Here are the stats: >>> >>> No spooling: >>> >>> Scheduled time: 30-Jan-2006 18:04:06 >>> Start time: 30-Jan-2006 18:04:11 >>> End time: 30-Jan-2006 18:09:12 >>> Priority: 10 >>> FD Files Written: 20,102 >>> SD Files Written: 20,102 >>> FD Bytes Written: 846,587,164 >>> SD Bytes Written: 849,703,073 >>> Rate: 2812.6 KB/s >>> >>> Spooling >>> >>> Scheduled time: 30-Jan-2006 23:59:09 >>> Start time: 30-Jan-2006 23:59:13 >>> End time: 31-Jan-2006 00:06:57 >>> Priority: 10 >>> FD Files Written: 20,102 >>> SD Files Written: 20,102 >>> FD Bytes Written: 846,587,164 >>> SD Bytes Written: 849,703,073 >>> Rate: 1824.5 KB/s >>> >>> This can't be network speed, as it is spooled. The only thing I'm >>> thinking is that the disk could be THAT slow? Doesn't seem likely. >>> The disk and tape are not likely to be on the same controller. Any tips? >>> >>> Thanks! >>> >> >> >> ------------------------------------------------------- >> This SF.net email is sponsored by: Splunk Inc. Do you grep through log >> files >> for problems? Stop! Download the new AJAX search engine that makes >> searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! >> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642 >> _______________________________________________ >> Bacula-users mailing list >> Bac...@li... >> https://lists.sourceforge.net/lists/listinfo/bacula-users > > > > > ------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. Do you grep through log > files > for problems? Stop! Download the new AJAX search engine that makes > searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642 > _______________________________________________ > Bacula-users mailing list > Bac...@li... > https://lists.sourceforge.net/lists/listinfo/bacula-users > -- IT-Service Lehmann al...@it... Arno Lehmann http://www.its-lehmann.de |