topic /tmp & /opt extending in Operating System - HP-UX

/tmp & /opt extending

kunjuttan — Wed, 28 Jul 2010 04:12:36 GMT

Hi gurus,
I have 2 servers in which I need to extend some filesystems.
1)In one server two FS are in threshold level.

/dev/vg00/lvol6 2097152 1890928 204768 90% /tmp
/dev/vg00/lvol4 2097152 1803720 291200 86% /home

vgdisplay output is--
VG Name /dev/vg00
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 13
Open LV 13
Max PV 16
Cur PV 1
Act PV 1
Max PE per PV 4356
VGDA 2
PE Size (Mbytes) 32
Total PE 4346
Alloc PE 2835
Free PE 1511
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

2)In other server one FS are in threshold level.

/dev/vg00/lvol4 7274496 6835232 435840 94% /opt

vgdisplay output is--
VG Name /dev/vg00
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 15
Open LV 15
Max PV 16
Cur PV 1
Act PV 1
Max PE per PV 4465
VGDA 2
PE Size (Mbytes) 64
Total PE 4455
Alloc PE 3215
Free PE 1240
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

In both the cases free PE s are available. Please tell me how to proceed to extend these three FS.Is this required a reboot to single user mode?

OS - HPUX11.23
OnlineJFS not available.
RX series Servers-Itanium CPU

Re: /tmp & /opt extending

Abid Iqbal — Wed, 28 Jul 2010 04:20:16 GMT

Backup data on both the mounts.
Reboot system in single user mode.
Extend lv and extend filesystem using extendfs.

Re: /tmp & /opt extending

Raj D. — Wed, 28 Jul 2010 04:20:43 GMT

Kunjuttan,

Begin with this:

>>
/dev/vg00/lvol6 2097152 1890928 204768 90% /tmp
/dev/vg00/lvol4 2097152 1803720 291200 86% /home

> OnlineJFS not available.
- How do you know is not there.

For above two: (With online jfs )
1. # lvextend -L 4096 /dev/vg00/lvol4
2. # fsadm -b 4096m /home

- without online jfs:
1. # fuser -cu /home
2. # fuser -ku /home # will kill all /home processes.
3. # umount /home
4. # lvextend -L 4096 /dev/vg00/lvol4
5. # extendfs /dev/vg00/rlvol4
6. # mount /home # Verify.

Cheers,
Raj.

Re: /tmp & /opt extending

Raj D. — Wed, 28 Jul 2010 04:35:14 GMT

Kunjuttan,

If you are trying /opt and /tmp without online jfs you can do from single user mode.

Online JFS can be cheked with:
# swlist -l product | grep -i jfs
# /sbin/vxlicrep

without online JFS :
- reboot the system
- Interupt boot sequence.
- from EFI shell:> boot vmunix -is
- activate vg00
- mount all but /opt
#(check /etc/fstab ) for lvol reference .
- extend /opt
# lvextend -L ...
# extendfs /dev/vg00/rlvol..

- mount and check. # bdf /opt
- same for /tmp .
- boot in multiuser mode. # init 3
or reboot .

Cheers,
Raj.

Re: /tmp & /opt extending

kunjuttan — Wed, 28 Jul 2010 05:14:50 GMT

"If you are trying /opt and /tmp without online jfs you can do from single user mode."

So can i do it in multiusermode also,if onlinejfs is ther???

Re: /tmp & /opt extending

stephen peng — Wed, 28 Jul 2010 07:53:27 GMT

quite simple, like you want to extend /tmp to 4096m:
# lvextend -L 4096 /dev/vg00/lvol6
# fsadm -b 4096m /tmp

Re: /tmp & /opt extending

Fabio Ettore — Wed, 28 Jul 2010 07:59:30 GMT

Hi,
if you have OnlineJFS ("swlist -l product |grep -i online" to check) you can do that in multi-user mode by

lvextend -L /dev/vg00/lvol4
fsadm -F vxfs -b /home
(this is the sample just for /hoem on the first system)

Otherwise you have to get single-user mode and using extendfs with filesystems unmounted.

HTH.

Best regards,
Fabio

Re: /tmp & /opt extending

Raj D. — Wed, 28 Jul 2010 08:08:38 GMT

Kunjuttan,
(again),

> So can i do it in multiusermode also,if onlinejfs is ther???

- Yes, this is pretty easy if you have Online JFS. Online JFS comes with MCOE Operating OE. by Default.

Check type of OE you have:
# swlist -l bundle | grep HPUX11

With online JFS, it is as simple as just typing two command:(lvextend & fsadm )

Ex: Suppose you want to add 2GB to those 2GB FS.
1. # Check the current size with lvdisplay
# lvdisplay /dev/vg00/lvol6 | grep "LV Size"
2. # Add 2048 to that value, to make 2GB extension.
- So total comes 4096. (This is for /tmp)
# lvextend -L 4096 /dev/vg00/lvol6
# fsadm -b 4096M /tmp
# bdf /tmp

3. Done.

Enjoy,
Raj.

Re: /tmp & /opt extending

kunjuttan — Wed, 28 Jul 2010 08:09:18 GMT

i already mentioned that onlinejfs is not there....

Re: /tmp & /opt extending

Raj D. — Wed, 28 Jul 2010 08:22:49 GMT

> i already mentioned that onlinejfs is not there....

- So you have to spend some $$$, or to accept the pain , as it is not straight forward without Online JFS.
- The main thinghe file system needs to be unmounted to be able to use extendfs command.
- /tmp and /opt cannot be unmounted when the system is in multiuser mode,(run level 3) (#who -r) as the files will be in use by the system and by the services.

Hth,
Raj.

Re: /tmp & /opt extending

kunjuttan — Tue, 03 Aug 2010 06:37:02 GMT

Hi gurus,
Pls guide me..am going to do the exention.
1)How can I go to single user mode directly from multiuser?
2)After booting into single user mode what I have to do??
vgchange -a y vg00
Mounting /.And any other file systems required??
3)Is it like normal fs extending procedure?

Re: /tmp & /opt extending

Dennis Handly — Tue, 03 Aug 2010 12:11:11 GMT

>1) How can I go to single user mode directly from multiuser?

You basically have to boot into single user mode, init -s won't work.

Re: /tmp & /opt extending

Steven E. Protter — Tue, 03 Aug 2010 12:18:11 GMT

Shalom,

Even without OnlineJFS this is pretty simple.

You just need to umount the file system and run extendfs

Problem is /tmp is usually pretty busy, and you will need to arrange a downtime. You need not go to single user mode, it would be enough to merely shut down applications that use /tmp

Of course single user or lvm maintenance mode does make all of this easier, but you have to sit through a reboot.

SEP

Re: /tmp & /opt extending

kunjuttan — Tue, 03 Aug 2010 13:12:51 GMT

Can you please give me the steps..
Is the command "shutdown -y now" is ok for booting in single user mode..
After booting in single user mode,what all things has to be done before going for an extension?And also Can i able login noramllay in single user mode..or mp login???

Re: /tmp & /opt extending

KapilRaj — Tue, 03 Aug 2010 15:23:56 GMT

init 1 will take you to single user mode ..

Once there, umount /tmp & /opt # Kill any process that is still accessing and extend the filesystem - procedure has been explained already. After this reboot the system.

Regards,

Kaps

Re: /tmp & /opt extending

kunjuttan — Wed, 04 Aug 2010 05:33:24 GMT

Do need to activate the VG00??And also the VG00 is mirrored..
How to know that the FS is accesing and how to kill that???-By fuser???

Re: /tmp & /opt extending

VVS — Wed, 04 Aug 2010 05:45:22 GMT

Use
fuser -cu /tmp --- To check the process accessing File system

Use
fuser -ku /tmp --- To kill the process.

Regards,
VVS

Re: /tmp & /opt extending

kunjuttan — Wed, 04 Aug 2010 06:29:47 GMT

Somewhat clear.Now my concern is how to boot into single-usermode in a RX series server.??my server model is-ia64 hp server rx7640.
And one more thing my rootvg is already mirrored.So anything else is to be done after extending the /tmp??

Re: /tmp & /opt extending

VVS — Wed, 04 Aug 2010 06:49:42 GMT

You should interupt the booting when it ask you to press any key within 10 secs.

It will take you to menu, where you need to give this command.

Menu> bo pri

It will ask, do you want to interact with IPL Y/N ?

Give "Y" . It will take you to ISL prompt. In ISL give this command.

ISL>hpux -is

This will boot the system into single user mode.

-------

These are the steps to boot the integrity servers into single user mode.

Boot the system to the EFI manager screen.

EFI Boot manager screen:
-----------------------------------------------------------------------------------------

EFI Boot Manager ver 1.10 [14.57] Firmware ver 2.31

Please select a boot option

HP-UX Primary Boot: 0/1/1/1.2.0
EFI Shell [Built-in]
Boot option maintenance menu
Security/Password Menu

Use | and | to change option(s). Use Enter to select an option
-----------------------------------------------------------------------------------------

If a primary HP-UX boot option is available - select it by pressing enter

-----------------------------------------------------------------------------------------
(c) Copyright 1990-2003, Hewlett Packard Company.
All rights reserved

HP-UX Boot Loader for IPF -- Revision 1.73

Press Any Key to interrupt Autoboot
AUTO ==> boot :IINSTALL
Seconds left till autoboot - 9
Type 'help' for help
-----------------------------------------------------------------------------------------

>> Interrupt the auto-boot sequence by pressing the SPACE bar.
This will bring you to the HPUX> prompt.

For HP-UX Single user mode:

HPUX> boot vmunix -is

Re: /tmp & /opt extending

VVS — Wed, 04 Aug 2010 06:51:48 GMT

Can you paste the lvdisplay output for the LV which you want to extend?