topic Re: increase size LVDISK (VM Guest) in Operating System - HP-UX

increase size LVDISK (VM Guest)

Eli Daniel — Wed, 02 Jun 2010 01:53:29 GMT

Hi,
i have increase size in the virtual machine for vgecc.
these disk asigned in the vgecc were assigned lvdisk in the VM host.
to change the size of vg in the guest VM guest I have the server down?

Re: increase size LVDISK (VM Guest)

Suraj K Sankari — Wed, 02 Jun 2010 02:42:33 GMT

Hi,
>>to change the size of vg in the guest VM guest I have the server down?

If you have online JFS then reboot is not required

Suraj

Re: increase size LVDISK (VM Guest)

Eli Daniel — Wed, 02 Jun 2010 11:56:13 GMT

how cant know?

Re: increase size LVDISK (VM Guest)

Eli Daniel — Wed, 02 Jun 2010 11:56:38 GMT

Operation System 11.23 Itanium 64 bits

Re: increase size LVDISK (VM Guest)

Torsten. — Wed, 02 Jun 2010 12:56:14 GMT

I have never done this before, but I assume if your guests are using 11.23 or an early 11.31 you need to do an vgmodify (on guest) to make LVM aware of the new size.

Re: increase size LVDISK (VM Guest)

Steven E. Protter — Wed, 02 Jun 2010 13:44:05 GMT

Shalom,

hpvm version decides the outcome of this question.

Clearly life will be easier for you if you can boot the guests.

vgmodify functionality is added to 11.23 as a patch. It is built into 11.31

SEP

Re: increase size LVDISK (VM Guest)

Eli Daniel — Wed, 02 Jun 2010 19:05:17 GMT

the system operation support JFS

In the case modify lvdisk:

VMhost
lvextend -L 400 /dev/vg01/lvol4

VMguest
lvextend 400 /dev/vg01/lvol4
fsadm -F -vxfs -b 400M /usr/app1/data1

the run command wiht vgmguest up.

these is true?

Re: increase size LVDISK (VM Guest)

TwoProc — Wed, 02 Jun 2010 21:02:03 GMT

Re: your last question:

It's great that you've got Online JFS, therefore:

1) If you're on HPUX 11.3, then yes, that looks right.
2) If you're on HPUX 11.2, then you'll need to vgmodify first, then your commands.
3) If you're on HPUX 11.1, then no, you can't do this. You need to add new LUNS, not make existing LUNS larger.

Lastly, test this all out on a test server first, before changing production vm hosts and machines.

Re: increase size LVDISK (VM Guest)

Eli Daniel — Thu, 03 Jun 2010 14:11:01 GMT

Hi John,
2) If you're on HPUX 11.2, then you'll need to vgmodify first, then your commands.

vgmodify in the Host or Vm Guest?

Re: increase size LVDISK (VM Guest)

Torsten. — Thu, 03 Jun 2010 14:49:33 GMT

If you increase an LVOL on the host provided to the guest, you need to run vgmodify on the guest.

Re: increase size LVDISK (VM Guest)

Eli Daniel — Thu, 03 Jun 2010 17:25:39 GMT

argument which I use for the VM Guest vgmodify?

Re: increase size LVDISK (VM Guest)

Eli Daniel — Tue, 08 Jun 2010 15:01:03 GMT

Hi Torsten
I dont understand vgmodify in the VM host and VM guest?

I need to know how to increase or add a new disk to VM guest?
example:
Vm host
vgapp1 assigned LV disk to Vm Guest.

Vm host:
i need add 1 disk to vgapp1 and expand LV disk Vm guest.

Vm hosts:
vgextend /dev/vgapp1 /dev/dsk/c1t4d0
lvextend -L xxx /dev/vgapp1/lvapp1

Vm Guest:
lvextend -L xxx /dev/vg1/lv1

This is correct??

Re: increase size LVDISK (VM Guest)

Torsten. — Tue, 08 Jun 2010 15:17:55 GMT

If you extend the lvol on the host, you need to use vgmodify on the guest to make it aware of the increased virtual disk. Then you can use lvextend there.

Re: increase size LVDISK (VM Guest)

Eli Daniel — Tue, 08 Jun 2010 15:33:07 GMT

torsten, sorry again, but as vgmodify use on the guest? syntax or option to use?

Re: increase size LVDISK (VM Guest)

Eli Daniel — Wed, 09 Jun 2010 13:14:39 GMT

Thanks Torsten

Re: increase size LVDISK (VM Guest)

Torsten. — Wed, 09 Jun 2010 13:25:06 GMT

For those who need a manual, search for the PDF titled:

"Using the vgmodify command to perform LVM Volume Group Dynamic LUN Expansion (DLE) and Contraction (DLC)"