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Full Discussion: New to aix virtualization direction ?
Operating Systems AIX New to aix virtualization direction ? Post 302603503 by johnf on Thursday 1st of March 2012 07:06:11 AM
Old 03-01-2012
IVM and VIO
IVM and VIO are basically the same thing. The difference is with IVM you do not need an HMC for it to work as the graphical interface used to create LPARs is on the VIO using IVM. Using IVM you can do everything that is possible with a VIO configured system. the main difference is with IVM you can only have one VIO server so there is no reslilience!

For an environment with dual VIO servers and multiple LPARs you will need an HMC and 5 or more internal (or SAN) disks: 2 each for mirrored rootvg on the VIO servers and the remaining disk(s) can be partitioned into client logical volumes and virtualised to the client LPARs using VSCSI devices.
 

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LEARN ABOUT OSF1

vgreduce

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

NAME

       vgreduce - reduce a volume group

SYNOPSIS

       vgreduce  [-a|--all] [-A|--autobackup y|n] [-d|--debug] [-h|-?|--help] [--removemissing] [-t|--test] [-v|--verbose] VolumeGroupName [Physi-
       calVolumePath...]

DESCRIPTION

       vgreduce allows you to remove one or more unused physical volumes from a volume group.

OPTIONS

       See lvm for common options.

       -a, --all
	      Removes all empty physical volumes if none are given on command line.

       --removemissing
	      Removes all missing physical volumes from the volume group, if there are no logical volumes allocated on those. This resumes  normal
	      operation of the volume group (new logical volumes may again be created, changed and so on).

	      If this is not possible (there are logical volumes referencing the missing physical volumes) and you cannot or do not want to remove
	      them manually, you can run this option with --force to have vgreduce remove any partial LVs.

	      Any logical volumes and dependent snapshots that were partly on the missing disks get removed completely. This includes those  parts
	      that lie on disks that are still present.

	      If your logical volumes spanned several disks including the ones that are lost, you might want to try to salvage data first by acti-
	      vating your logical volumes with --partial as described in lvm (8).

SEE ALSO

       lvm(8), vgextend(8)

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