Convert rootvg to scalable Post: 302931083

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Operating Systems AIX Convert rootvg to scalable Post 302931083 by bakunin on Saturday 10th of January 2015 04:50:32 AM

01-10-2015

Registered User

Quote:

Originally Posted by omonoiatis9

well the reason i want to convert rootvg to scalable (even big may be enough) is because of my backup software. it uses /var and /opt and for the upgrade it needs additional space that is not available right now.

OK, but: with a classic VG you can use a PP size of up to 128G. Every PV ca hold 1016 PPs, which makes the maximum size of a PV in a classic VG ~1.2 TB. You can add up to 32 PVs to a VG, which makes the possible disk space in a rootvg 32 x 1.2 ~ 38TB. I do not know your backup software but this is perhaps enough.

Another take is: the software will perhaps not write to "/var" or "opt" directly but to some subdirectory "/var/somewhere". It is no problem to mount a FS with more space there which comes from a separate volume group.

If you want to increase the PP size for your rootvgs which you install via NIM you find a detailed how-to here.

I hope this helps.

bakunin

Last edited by bakunin; 01-10-2015 at 05:57 AM..

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LEARN ABOUT LINUX

vgcfgrestore

VGCFGRESTORE(8) 					      System Manager's Manual						   VGCFGRESTORE(8)

NAME

       vgcfgrestore - restore volume group descriptor area

SYNOPSIS

       vgcfgrestore [-d|--debug] [-f|--file filename] [-l[l]|--list] [-h|--help] [-M|--Metadatatype1|2] [-t|--test] [-v|--verbose] VolumeGroupName

DESCRIPTION

       vgcfgrestore  allows  you  to  restore  the metadata of VolumeGroupName from a text backup file produced by vgcfgbackup.  You can specify a
       backup file with --file.  If no backup file is specified, the most recent one is used.  Use --list for a list of the available  backup  and
       archive files of VolumeGroupName.

OPTIONS

       -l | --list -- List files pertaining to VolumeGroupName
	      List  metadata  backup  and  archive  files  pertaining  to VolumeGroupName.  May be used with the -f option.  Does not restore Vol-
	      umeGroupName.

       -f | --file filename -- Name of LVM metadata backup file
	      Specifies a metadata backup or archive file to be used for restoring VolumeGroupName.  Often this file has been created with  vgcfg-
	      backup.

       See lvm for common options.

REPLACING PHYSICAL VOLUMES

       vgdisplay  --partial  --verbose will show you the UUIDs and sizes of any PVs that are no longer present.  If a PV in the VG is lost and you
       wish to substitute another of the same size, use pvcreate --restorefile filename --uuid uuid (plus additional arguments as appropriate)	to
       initialise  it with the same UUID as the missing PV.  Repeat for all other missing PVs in the VG.  Then use vgcfgrestore --file filename to
       restore the volume group's metadata.

SEE ALSO

       lvm(8), vgcreate(8)

Sistina Software UK					 LVM TOOLS 2.02.95(2) (2012-03-06)					   VGCFGRESTORE(8)