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тАО09-15-2005 09:26 PM
тАО09-15-2005 09:26 PM
Max Pv in VG
Can I change this in a Vg that already exists?
The problem is that I have a Vg that single admits 16 disks and I need add another. ┬┐It is possible or i have to create another vg with more disks and migrate information.?
thanks
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тАО09-15-2005 09:34 PM
тАО09-15-2005 09:34 PM
Re: Max Pv in VG
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=89846
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=619420
-Arun
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тАО09-15-2005 09:43 PM
тАО09-15-2005 09:43 PM
Re: Max Pv in VG
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тАО09-15-2005 09:44 PM
тАО09-15-2005 09:44 PM
Re: Max Pv in VG
when you create another vg make sure that you also use the -e and -s option to create a volume group that can take the biggest disk in your envirment.
good luck mark
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тАО09-15-2005 10:04 PM
тАО09-15-2005 10:04 PM
Re: Max Pv in VG
It is not possible. You need to recreate the VG. Also plan for other useful parameters properly before recreation. If you do not intend to implement the PVG strict allocation and plan to create simple file systems spread across one or more disks then you could actually do this migration very fast.
Suppose your VG has 16 disks. You intend to add another four.
On new 4 disks create a new vg with all appropriate and planned parameters to accomodate both more than 16 physical disks and more than current size disks.
Now create file systems one or two spread across these disks. Copy the data from the old VG to these file systems to spare some disks in the old VG. Now reduce old VG from the spare disks and extend new VG to them. Again create one or two file systems across these disks and move more data from old VG. Like this if you old and new disks are of same size in four go you should be able to complete the activity.
If the new disks are of big size then you shall be able to do this in less than 4 repeats.
If your VG has only one or two file systems then this will not be helpful.
But to be safe take one backup before this.
HTH,
Devender
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тАО09-17-2005 08:10 AM
тАО09-17-2005 08:10 AM
Re: Max Pv in VG
What we do is we just create another VG and put the new LVs in the 2nd VG. The Oracle DBAs don't care about VGs. They just care about LVs or Mount Points.
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тАО09-18-2005 03:04 PM
тАО09-18-2005 03:04 PM
Re: Max Pv in VG
UNIX because I majored in cryptology...
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тАО09-18-2005 09:47 PM
тАО09-18-2005 09:47 PM
Re: Max Pv in VG
The MAX number of PV that can be in a VG is 255.
The default value is 16.
While the time of creating the vg you have to mention the Max no. of PV you are going to use ,
Ex: # vgcreate -p
Hope this will help,
Cheers,
Raj.
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тАО09-20-2005 12:56 AM
тАО09-20-2005 12:56 AM
Re: Max Pv in VG
Matthew from Boston