From: justin.bleistein@SUNGARD.COM
Date: Tue Jul 16 2002 - 10:05:02 EDT
There's an option on the "chvg" command which allows you to change
the limit of PP's per PV's. Check the AIX man pages, the reason for this
feature is for when you want to extend a volume group with a PV which is
much larger then any other already in the volume group and the PP size set
for the VG, may not be big enough or there may not be as many to allocate
that disk's size to that VG. So by changing the factor we make it so that
VG can accommodate this new larger disk,
cbaker@GOODYEAR.C
OM To: aix-l@Princeton.EDU
Sent by: IBM AIX cc:
Discussion List Subject: Too many PPs in a PV
<aix-l@Princeton.
EDU>
07/16/2002 09:32
AM
Please respond to
IBM AIX
Discussion List
I inherited a RS/6000 44P-270 running AIX 433 ML06. It has a volume group
called "sharevg" with the following settings:
rds1234:root: / > lsvg sharevg
VOLUME GROUP: sharevg VG IDENTIFIER: 0008140fc9666069
VG STATE: active PP SIZE: 4 megabyte(s)
VG PERMISSION: read/write TOTAL PPs: 4338 (17352
megabytes)
MAX LVs: 256 FREE PPs: 305 (1220
megabytes)
LVs: 5 USED PPs: 4033 (16132
megabytes)
OPEN LVs: 5 QUORUM: 2
TOTAL PVs: 1 VG DESCRIPTORS: 2
STALE PVs: 0 STALE PPs: 0
ACTIVE PVs: 1 AUTO ON: yes
MAX PPs per PV: 6096 MAX PVs: 5
rds1234:root: / >
How is it possible that the PP SIZE is only 4 Mb for a 18 Gb drive?
Doesn't AIX 4.3 restrict you to a MAX PPs per PV of 1016?
Here is the same box's rootvg.
rds1234:root: / > lsvg rootvg
VOLUME GROUP: rootvg VG IDENTIFIER: 0008140fa19742d0
VG STATE: active PP SIZE: 32 megabyte(s)
VG PERMISSION: read/write TOTAL PPs: 542 (17344
megabytes)
MAX LVs: 256 FREE PPs: 382 (12224
megabytes)
LVs: 15 USED PPs: 160 (5120
megabytes)
OPEN LVs: 14 QUORUM: 2
TOTAL PVs: 1 VG DESCRIPTORS: 2
STALE PVs: 0 STALE PPs: 0
ACTIVE PVs: 1 AUTO ON: yes
MAX PPs per PV: 1016 MAX PVs: 32
rds1234:root: / >
Now that looks right to me.
Any thoughts would be great.
Christopher M. Baker
Senior Technical Support Analyst
DSE/TCO
Goodyear Tire and Rubber Company
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