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тАО02-10-2004 01:48 AM
тАО02-10-2004 01:48 AM
Does HP-UX support mirror and striping at the same time?
Is it possible to do that?
Thanks
Juan
Solved! Go to Solution.
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тАО02-10-2004 01:51 AM
тАО02-10-2004 01:51 AM
SolutionWhat you can have is Distributed striping along with mirroring. With distributed striping your "stripe" size is the same size as the PE size you set up the VG with. With distributed striping you use the '-D y' option with lvcreate. You must also set up Physical Volume Groups (PVG) the Distributed striping "stripes" across all disks in the PVG. You would then set up your mirror with the PVG-strict option (-m 1 -s g with lvcreate).
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тАО02-10-2004 01:51 AM
тАО02-10-2004 01:51 AM
Re: Mirror and striping.
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тАО02-10-2004 01:51 AM
тАО02-10-2004 01:51 AM
Re: Mirror and striping.
See the man page for "lvcreate", in particular the -i stripes and -m mirror_copies options.
Pete
Pete
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тАО02-10-2004 01:54 AM
тАО02-10-2004 01:54 AM
Re: Mirror and striping.
Actually, for a better explanation, see Patrick's response(s) above!
Pete
Pete
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тАО02-10-2004 01:55 AM
тАО02-10-2004 01:55 AM
Re: Mirror and striping.
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тАО02-10-2004 01:55 AM
тАО02-10-2004 01:55 AM
Re: Mirror and striping.
I know that 11.00 supports "pseudo-striping".
I wonder if it is the same on 11i
Paco
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тАО02-10-2004 01:55 AM
тАО02-10-2004 01:55 AM
Re: Mirror and striping.
To answer your question, you cannot have both mirroring and striping at the same time. But if you want to use Distributed striping (with option -D y), you can use it with mirroring.
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тАО02-10-2004 01:59 AM
тАО02-10-2004 01:59 AM
Re: Mirror and striping.
# man lvcreate (for details)
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тАО02-10-2004 02:00 AM
тАО02-10-2004 02:00 AM
Re: Mirror and striping.
As already mentioned, it's not possible with LVM. You can do extent level striping/mirroring but that doesn't qualify as striping and mirroring. Here the stripe size is equal to your extent size which in most cases is 4MB. A stripe size of that big is not useful. Ofcourse it may be slightly better than non-striped LVs.
You will need to use VxVM (Veritas Volume Manager) which is a completely different realm.
-Sri