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тАО03-21-2002 06:57 AM
тАО03-21-2002 06:57 AM
If we start with a single volume group containing one LUN could get get more throughput by:
1. adding a second LUN to the volume group if the second LUN is in the same redundancy group.
2. adding a second LUN to the volume group if the second LUN is in the other redundancy group.
If one system was requesting IO across 4 LUNs and a second system was using only 1 LUN would the first system see better performance
Solved! Go to Solution.
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тАО03-21-2002 07:54 AM
тАО03-21-2002 07:54 AM
Re: Does configuring more than one LUN improve performance using HPUX and a va7400
There are several factors to consider here. However, generally speaking, the (4)LUN configuration would see better performance if configured correctly. My configuration method would be to configure (2)LUNS in separate Raid Groups, put them both in the same Volume Group, then stripe across the controllers. In other words, when viewing the vgdisplay, you will see alternate paths for each disk. Utilize the vgreduce/vgextend commands and reduce/extend the alternate paths to where you're utilizing BOTH paths simultaneously.
All the best,
Dave
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тАО03-21-2002 08:09 AM
тАО03-21-2002 08:09 AM
Re: Does configuring more than one LUN improve performance using HPUX and a va7400
You may also want to look at the following:
http://us-support2.external.hp.com/cki/bin/doc.pl/sid=b5c92172183287ea25/screen=ckiDisplayDocument?docId=200000058164219
If you can't get to the URL, the document ID is lpg35000.
Dave
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тАО03-21-2002 11:30 AM
тАО03-21-2002 11:30 AM
Re: Does configuring more than one LUN improve performance using HPUX and a va7400
Thanks for the info.
I cannot find doc lpg35000.
Any clue where it might be?
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тАО03-21-2002 11:59 AM
тАО03-21-2002 11:59 AM
SolutionOddly enough the link is no longer valid. I did find a similar document on LUNS at:
http://www.hp.com/cposupport/information_storage/support_doc/lpg35039.html
You may also want to look here for manuals, faqs, etc.
http://www.hp.com/cposupport/manindex/hpsurestor43759_eng_man.html
As well as this one:
http://www.hp.com/products1/storage/disk_arrays/midrange/va7400/infolibrary/index.html
I personally like the last one for the in depth information on virtualization, etc. Wait, I feel my propeller beginning to turn...
HTH,
Dave
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тАО03-21-2002 12:24 PM
тАО03-21-2002 12:24 PM
Re: Does configuring more than one LUN improve performance using HPUX and a va7400
Now I have some good bed time reading. :-)
Bill