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тАО03-13-2006 04:01 AM
тАО03-13-2006 04:01 AM
Does anyone know how to acquire tape device throughput statistics within HP-UX? I have Measureware/Glance installed on the system.
Apparently this can be done with the iostat command in Solaris, but there are few options for the HP-UX version.
I am trying to identify faults with our Netbackup SAN environment, and would like to verify the data throughput.
Environment:
- HP-UX 11i v1
- IBM atdd driver v3.5.0.20
- IBM Ultrium LTO2 3580 tape drives (SAN attached)
- Netbackup 5.1 MP4
Thanks in advance,
James
Solved! Go to Solution.
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тАО03-13-2006 04:11 AM
тАО03-13-2006 04:11 AM
SolutionProcesses -> Select a tape drive related process
Next, Reports ->Process Open Files
You should then note how the File Offset for the tape device node changes over time.
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тАО03-13-2006 04:39 AM
тАО03-13-2006 04:39 AM
Re: Tape device I/O statistics
I think glance or sar tools, with glance being the better choice will do the job for you.
Don't expect the actual throughput to reach anywhere near the theoretical speed of your scsi connection.
Real life won't appraoch that.
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО03-13-2006 06:27 AM
тАО03-13-2006 06:27 AM
Re: Tape device I/O statistics
Peace & Clean Earth!
I do not think there are no tape device measurement tools available on HP-UX...
SEP, sar only does that on Solaris.
FWIW.
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тАО03-13-2006 06:34 AM
тАО03-13-2006 06:34 AM
Re: Tape device I/O statistics
I've defined the Netbackup bptm process as an application within Measureware, but it only appears to record the reads from disk. All other I/O appears to be '0' or a negligible amount.
Thanks,
James
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тАО03-15-2006 04:20 AM
тАО03-15-2006 04:20 AM
Re: Tape device I/O statistics
I agree that Glance is probably going to be your best bet to get 'live numbers'
I suggest you also look at the Performance Assessment Tools (PAT) and Lib and Tape Tools (L&TT).
There is even a 'howto' document with links to the tools:
www.hp.com/support/pat
These should help you to identify where in your setup the bottleneck may be happening.
Do Netbackup Support or IBM support folks have any suggestions or tools which may also help you?
Regards,
Nick
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тАО03-15-2006 05:05 AM
тАО03-15-2006 05:05 AM
Re: Tape device I/O statistics
Thanks for the information. Funnily enough, someone has forwarded me the link to the PAT site today.
I have had problems with vendors accepting responsibility due to the multi-vendor configuration of this solution, but will persevere.
It looks like our storage team may have identified a fault on the SAN which is causing the HP systems to have problems. When the link with a suspected problem is active Netbackup slow-downs and backup hangs are experienced.
Thanks,
James