topic Re: lvextend in Operating System - HP-UX

lvextend

masood bt — Mon, 23 Mar 2009 11:09:49 GMT

Need your suggestions and precautions to extend the LV. Details are attached.

Thank you.

Re: lvextend

James R. Ferguson — Mon, 23 Mar 2009 11:16:46 GMT

Hi:

I suggest you read chapter-6 here:

http://docs.hp.com/en/B2355-90950/ch06.html

Regards!

...JRF...

Re: lvextend

Sharma Sanjeev — Mon, 23 Mar 2009 11:21:55 GMT

Hi Masood

As you have online JFS installed you can extend FS online

lvextend
fsadm

As your LV is in VG00 so you need to check if this is mirrored or not

vgdisplay -v vg00

regards
Sanjeev

Re: lvextend

Ganesan R — Mon, 23 Mar 2009 11:25:07 GMT

Hi,

Do you have free space of 32GB on /dev/vg00 ?

Provide the following output.

#vgdisplay /dev/vg00

Re: lvextend

masood bt — Mon, 23 Mar 2009 11:38:02 GMT

PE Size (Mbytes) 32
Total PE 4346
Alloc PE 2294
Free PE 2052

Attached vgdisplay and vgdisplay -c output
recently we removed a disk from the vg

As i can see many process from fuser on u01 I was wondering if I can go ahead and increase the lv size....

James R. Ferguson I will go through your doc now

Re: lvextend

Sharma Sanjeev — Mon, 23 Mar 2009 11:41:57 GMT

Hi

As you have online JFS installed and have approx 20% free on FS, so you can extend this lvol online.

Regards
Sanjeev

Re: lvextend

masood bt — Mon, 23 Mar 2009 11:53:44 GMT

My main question is there are many processes running. attached the processes

Re: lvextend

masood bt — Mon, 23 Mar 2009 11:55:08 GMT

sorry forgot to attacht the file

Re: lvextend

Sharma Sanjeev — Mon, 23 Mar 2009 11:55:54 GMT

No Problem than also u can extend it online,
with ONLINE JFS,

That's why ONLINE JFS comes in picture
no need to umount the FS

REgards
Sanjeev

Re: lvextend

masood bt — Mon, 23 Mar 2009 11:56:09 GMT

sorry again

Re: lvextend

Ganesan R — Mon, 23 Mar 2009 12:00:43 GMT

Hi,

Don't bother about the processes running on the filesystem since you have online JFS product installed. Just run the below commands to extend the filesystem.

#lvextend -L 32768 /dev/vg00/lv-oracle-u01
#fsadm -F vxfs -b 32768M /u01

#bdf /u01

In the examble we are extending the mount point u01 to 32GB total.

Re: lvextend

Ganesan R — Mon, 23 Mar 2009 12:02:44 GMT

Hi,

It is not preferred to have data lv's on vg00 though nothing is blocking.

vg00 should be used for only operating system for better managablity

Re: lvextend

Sharma Sanjeev — Mon, 23 Mar 2009 12:04:23 GMT

Hi Ganasen

He needs to extend Filesystem by 32 Gig more,
so old+new (16+32) size is required not only new size
while lvextend.( may be typo ) :-)

Regards
Sanjeev

Re: lvextend

Sharma Sanjeev — Mon, 23 Mar 2009 12:06:21 GMT

Hi

Sorry my mistake its 32G only :-)

Hi masood bt

Please assign the points as per ITRC rules
If you are happy with replies
Regards
Sanjeev

Re: lvextend

masood bt — Mon, 23 Mar 2009 15:58:32 GMT

Urgent reply needed please.
I know one disk is removed from the VG. I think the problem I am facing is due to the strict allocation policy. How to overcome this now?

rc85odb2:/ # lvextend -L 32768 /dev/vg00/lv-oracle-u01
lvextend: Warning: couldn't query physical volume "/dev/dsk/c2t0d0s2":
The specified path does not correspond to physical volume attached to
this volume group
lvextend: Warning: couldn't query all of the physical volumes.
lvextend: Not enough free physical extents available.
Logical volume "/dev/vg00/lv-oracle-u01" could not be extended.
Failure possibly caused by strict allocation policy
rc85odb2:/ #

Re: lvextend

masood bt — Mon, 23 Mar 2009 16:39:45 GMT

Dear Torsten,

the lv is mirrored. I have enough free PEs. you can see it from here

think I do have enough free PEs
rc85odb2:/ # vgdisplay /dev/vg00
vgdisplay: Warning: couldn't query physical volume "/dev/dsk/c2t0d0s2":
The specified path does not correspond to physical volume attached to
this volume group
vgdisplay: Warning: couldn't query all of the physical volumes.
--- Volume groups ---
VG Name /dev/vg00
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 11
Open LV 11
Max PV 8
Cur PV 2
Act PV 1
Max PE per PV 9200
VGDA 2
PE Size (Mbytes) 32
Total PE 4346
Alloc PE 2294
Free PE 2052
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

rc85odb2:/ #

so do i need to remoe the missing disk from mirror?

rc85odb2:/ # lvdisplay -v /dev/vg00/lv-oracle-u01
lvdisplay: Warning: couldn't query physical volume "/dev/dsk/c2t0d0s2":
The specified path does not correspond to physical volume attached to
this volume group
lvdisplay: Warning: couldn't query all of the physical volumes.
--- Logical volumes ---
LV Name /dev/vg00/lv-oracle-u01
VG Name /dev/vg00
LV Permission read/write
LV Status available/stale
Mirror copies 1
Consistency Recovery MWC
Schedule parallel
LV Size (Mbytes) 16384
Current LE 512
Allocated PE 1024
Stripes 0
Stripe Size (Kbytes) 0
Bad block on
Allocation strict
IO Timeout (Seconds) default

--- Distribution of logical volume ---
PV Name LE on PV PE on PV
/dev/dsk/c0t0d0s2 512 512

--- Logical extents ---
LE PV1 PE1 Status 1 PV2 PE2 Status 2
00000 /dev/dsk/c0t0d0s2 01782 current ??? 01782 stale
00001 /dev/dsk/c0t0d0s2 01783 current ??? 01783 stale
00002 /dev/dsk/c0t0d0s2 01784 current ??? 01784 stale
00003 /dev/dsk/c0t0d0s2 01785 current ??? 01785 stale
00004 /dev/dsk/c0t0d0s2 01786 current ??? 01786 stale
--------
-------

Re: lvextend

masood bt — Mon, 23 Mar 2009 16:43:55 GMT

I got a window for this lvextend and I am running out of time :-(

Re: lvextend

Torsten. — Mon, 23 Mar 2009 16:44:01 GMT

As said earlier, as long the disk is missing you cannot extend it, because it want to mirror the LVOL to the missing disk.

Fix your missing disk problem and it will work.

Re: lvextend

masood bt — Mon, 23 Mar 2009 16:46:13 GMT

Ah..Torsten thanks for responding... we intentionally removed ther disk a few days ago and presented it to the other vPar.
Now there is only this disk remaining.
Now I think I should break the mirror and tell the VG/LV that there is no mirror disk.
And then I should proceed with the lvextend.

Also, vgdisplay shows me the enough free PE.

Am I correct?

Re: lvextend

masood bt — Mon, 23 Mar 2009 16:48:26 GMT

the current size of the /u01 is 16 G
I need to make it 32G
I have 2052 free PEs(each 32MB)