HP-UX 11i v3 LVM New Features in HP-UX 11i v3 (September 2009)

Compact, Parsable Command Output

en enhanced to produce a compact and easily parsable output. A new option -F

is introduced in pvdisplay, vgdisplay ,and lvdisplay commands. The commands generate colon-separated fields as

ut can be split across multiple lines. The output

can include new keys or values in the future. The positioning of a given key and value pair is not

ed. If a key is deprecated, its associated value is set to NAM (key=NAM). HP recommends all user scripts

Examples

• ogical volume name and field name as specified in the

lvdisplay -F output, the following script

the value for the given key:

LVDISPLAY_F_OUTPUT_KEY=$2;

LV_NAME | /usr/bin/awk -F':' '{for(i=1;i<=NF;i++) print $i;}' | \

info /dev/vgtest/lvol1 lv_size

, the following script lists all the physical volume belonging to the volume group

_in_vg

vgdisplay -Fv $VG_NAME | sed -n -e "s/^.*pv_name=$[^:.]*$:.*$/\1/p"

# get_pv_in_vg /dev/vgtest

• Perl Sample example: Given a physical volume name and field name as specified in the

pvdisplay -F output ,

the following script extracts the value for the given key:

# cat get_pvinfo

#!/usr/bin/perl

my $PV_NAME = $ARGV[0];

my $PVDISPLAY_KEY = $ARGV[1];

my %pvdisplay_hash = ();

Usability Enhancements

LVM display commands have be

key=value[,value...]:key=value[,value].

The

-F option is for use in scripts. The resulting command outp

guarante

depending on LVM display commands’ output to be modified to use

-F option.

Given a l

extracts

# cat get_lvinfo

#!/bin/sh

_NAME=$1; LV

lvdisplay -F $

awk /$LVDISPLAY_F_OUTPUT_KEY/ | cut -f2 -d "="

# get_lv

• Given a volume group name

# cat get_p

#!/bin/sh

VG_NAME=$1;

/dev/dsk/c11t0d5

/dev/dsk/c7t0d1