topic Re: Shrinking /var in Operating System - HP-UX

Shrinking /var

Lacrosse — Tue, 19 Nov 2002 20:15:01 GMT

I have a mirrored /var filesystem and want to shrink it, can I do this through SAM or command line only, if command line does someone know off hand what thos commands are (I'm assuming I have to break the mirror) Also I do not have Online JFS

Re: Shrinking /var

Pete Randall — Tue, 19 Nov 2002 20:19:31 GMT

Go UT!

Oh, ah, back to business. Without Online JFS, you're going to have to re-boot into single user mode just to get it unmounted so you can work on it. Make sure you have GOOD backups before you start, and a good plan of attack, then schedule some downtime.

Pete

Re: Shrinking /var

Pete Randall — Tue, 19 Nov 2002 20:21:58 GMT

I should mention that the easiest way to accomplish this, provide you have some extra disk space is to create a new filesystem (call it /var2), restore everything into it, then switch the mounts for /var and /var2 and reboot.

Pete

Re: Shrinking /var

Jeff Schussele — Tue, 19 Nov 2002 20:25:26 GMT

Sorry - without OnLine JFS you cannot do this outside of single-user mode.

Rgds,
Jeff

Re: Shrinking /var

Oleg Zieaev_1 — Tue, 19 Nov 2002 20:27:09 GMT

agree with /var2 approach.
Easy and working.

Hope this helps.
0leg

Re: Shrinking /var

Oleg Zieaev_1 — Tue, 19 Nov 2002 20:31:02 GMT

/var is not necessary to be big.
We use /var/tmp, /var/opt/perf, /var/adm/crash as separate file systems mounted under /var.
This also give us flexibility maintaining them.

Hope this helps,
0leg

Re: Shrinking /var

James R. Ferguson — Tue, 19 Nov 2002 20:32:15 GMT

Hi:

I give careful consideration to not shrinking /var. One always needs space for patches (/var/adm/sw/) and for temporary space (/var/tmp/).

If you insist, in the absence of OnlineJFS you will need to boot into single user mode and use the LVM commands in the '/sbin' directory. Alternately, mount '/usr'. You do not need to break the mirror; merely resize your filesystem. Be advised that you will need to reload the data therein afterwards since to shrink it in the absence of OnlineJFS means that you 'newfs' to a smaller size!

Regards!

...JRF...

Re: Shrinking /var

Kellogg Unix Team — Tue, 19 Nov 2002 20:33:59 GMT

Hi,

Another way will be to do a "make_tape_recovery" of your vg00, boot from this tape, and resize the logical volumes. You need to have Ignite/UX software installed on the system which can be downloaded from HP's site.

HTH
...Manjeet

Re: Shrinking /var

Kellogg Unix Team — Tue, 19 Nov 2002 20:39:27 GMT

I agree with Oleg - make separate mount points to contain /var viz. /var/adm/crash can go to its own mount mount.

You may also want to run 'cleanup' utility (for patch cleanup) to make room in /var. Do "man cleanup" for details.

Thanks
...Manjeet

Re: Shrinking /var

Lacrosse — Tue, 19 Nov 2002 21:51:24 GMT

Thanks for the help.....bummer about the horns this week-end Pete