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тАО04-04-2006 10:06 AM
тАО04-04-2006 10:06 AM
Extending volume group
"BACKUP, BLOW AWAY VG, RECREATE VG, RESTORE"
is the necessary means to increase Max PE per PV.
Has anyone ever done this before? Apparently, I need to perform this and I've never done this before, so I'm more than a little intimidated.
Thank You
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тАО04-04-2006 10:15 AM
тАО04-04-2006 10:15 AM
Re: Extending volume group
Yes, that is the means to increase a volume group's 'max_pe' or 'max_pv' or 'pe_size' or 'max-lv'.
The easy approach is to backup your filesystems and then:
# vgchange -a n vgXX
# vgexport vgXX
This quickly eliminates the volume group and all its logical volumes. You will need to do :
# pvcreate -f
...to overwrite the LVM header since LVM will ever-so-helpfully try to warn you that LVM information still exists on the physical disks (it does).
Now, follow the normal steps ('mknod', 'pvcreate', 'vgcreate', 'lvcreate' and build a new volume group and restore your data.
Regards!
...JRF...
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тАО04-04-2006 10:16 AM
тАО04-04-2006 10:16 AM
Re: Extending volume group
There is another option. You can add additional disks (LUN's) of the same size as the largest existing PV to your VG. You can even add larger disks if you are willing to allow some of the space to go unused.
If you are unfamiliar with the process; other than the backups and verify, every needed step can be done under SAM. Backups and restores can also be done using SAM but this is one area where I would absolutely know what commands and what options are used. Your fastest free backup/restore tool is fbackup/frecover so make youreself very familiar with those commands to the point of doing some non-critical backups and restores before doing the real thing.
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тАО04-04-2006 10:18 AM
тАО04-04-2006 10:18 AM
Re: Extending volume group
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тАО04-04-2006 10:45 AM
тАО04-04-2006 10:45 AM
Re: Extending volume group
It's actually "vg08", and it houses Informix dataspaces. I'm currently holding down the fort until a new guy starts in a few weeks.
I'll let you know what happens.
Thanks again
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тАО04-04-2006 10:52 AM
тАО04-04-2006 10:52 AM