Extend LVM Volume group

[huismanh]

Is it possible to change the value of "VG Max Size"
HP-UX version 11.31
LVM-version 2

After definening a second physical volume it is not possible to use added space above the defined "VG Max Size" when the VG was created

[Torsten.]

What value you are talking about?

> vgdisplay -v vg00
--- Volume groups ---
VG Name /dev/vg00
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 8
Open LV 8
Max PV 16
Cur PV 1
Act PV 1
Max PE per PV 4238
VGDA 2
PE Size (Mbytes) 8
Total PE 4228
Alloc PE 3801
Free PE 427
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0
VG Version 1.0.0


usr/sbin/vgmodify [-B bootable] [-e max_pe] [-l max_lv] [-n] [-p max_pv] [-r] [-v] vg_name [pv_path...]


Do you want to change the max_pe value?

See

http://docs.hp.com/en/B2355-60130/vgmodify.1M.html

[Mridul Shrivastava]

There is nothing call VG MAX Size....

yes you can increase Max PE per PV but you may have to increase the PE Size value as well so it can accomodate all the headre information.

Read man vgmodify for more details.

[Sharma Sanjeev]

Hi

You can Change Max PE in VG with vgmodify command in 11.31, it was not supported by HP before 11.31.

Regards
Sanjeev

[Torsten.]

This is not entirely true, see

http://docs.hp.com/en/B3921-60631/vgmodify.1M.html

(this is
HP-UX 11i Version 2: December 2007 Update)

[huismanh]

I want (my customer) to change the value of "VG Max Size"

The output below is not from the VG that needs to be extended but shows the parameter "VG Max Size" I mean.

# vgdisplay -v vgS32logexe
--- Volume groups ---
VG Name /dev/vgS32logexe
VG Write Access read/write
VG Status available
Max LV 511
Cur LV 3
Open LV 3
Max PV 511
Cur PV 1
Act PV 1
Max PE per PV 48128
VGDA 2
PE Size (Mbytes) 1
Total PE 48119
Alloc PE 47104
Free PE 1015
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0
VG Version 2.0
VG Max Size 47g
VG Max Extents 48128


The value must be defined in case of LVM version 2.

[Sharma Sanjeev]

Hi Torston

I mean to say before 11.31

use vgmodify on 11.23 as a patch PHCO_35524

or vgmodify is part of 11.31

Regards
Sanjeev

[Torsten.]

OK, this is new to LVM version 2.

It's a calculated value, see

Max PE per PV 48128
PE Size (Mbytes) 1
Total PE 48119
Alloc PE 47104
VG Max Size 47g


Max PE per PV * PE Size = VG Max Size

48128 * 1MB = 48GB (rounded)

So you need to increase the max_pe value.

[Torsten.]

Keep in mind you are currently limited by the PE_size of 1MB.

In order to increase this you must delete and re-create this VG.

See also

http://docs.hp.com/en/lvm-v2/LVM_Version2.0_VG.pdf

[huismanh]

Thanks all for you're replies.
I will inform my customer

regards,
Hennie