topic Re: LVREDUCE ONLINE in Operating System - HP-UX

LVREDUCE ONLINE

Miguel Carabano_1 — Fri, 25 Aug 2006 11:53:25 GMT

Hi team,

I need reduce one FS /var,
see file: lvdisplay.out

How i can, reduce logical volume and FS Online.

My system already has license of Online JFS

Thanks.

Re: LVREDUCE ONLINE

James R. Ferguson — Fri, 25 Aug 2006 11:59:37 GMT

Hi Miguel:

You can use 'fsadm' to reduce as well as expand the size of a logical volume under OnlineJFS. See the 'fsadm(1M)' manpages for more information.

Once the filesystem has been successfully reduced, use 'lvreduce' to reduce the logical volume container size.

Regards!

...JRF...

Re: LVREDUCE ONLINE

A. Clay Stephenson — Fri, 25 Aug 2006 12:00:16 GMT

First run fsadm -F vxfs -b smaller size then lvreduce. However, depending upon the version of HP-UX and the patches this may not be wise. While expanding an LVOL/filesystem "on the fly" has never been a problem there have been cases (especially on 10.20 but also on 11.0) where shrinking the filesystem led to corruption. In any event, I would take a backup before doing anything.

Man fsadm_vxfs and lvreduce for details.

Re: LVREDUCE ONLINE

Pete Randall — Fri, 25 Aug 2006 12:01:24 GMT

Your best chance of success requires that you first reorganize and defragment the filesystem:

fsadm -F vxfs -d -D -e -E /var

You can then proceed to reduce using fsadm with the -b option.

Have a look at the man page for fsadm_vxfs.

Pete

Re: LVREDUCE ONLINE

Miguel Carabano_1 — Fri, 25 Aug 2006 12:07:49 GMT

Hi,

Os: HP-UX B.11.23 U ia64
HPUX11i-OE-MC B.11.23.0409
HP-UX Mission Critical Operating Environment Component

Re: LVREDUCE ONLINE

A. Clay Stephenson — Fri, 25 Aug 2006 12:13:20 GMT

This should be safe on 11.23. Of course, if you go ahead and make a backup then you won't need it; if you don't, ... . If you do want to defragment the filesystem first (which never hurts) then I would add a time-limit (e.g. -t 3600) so that the operation ceases after 1 hour or if finished.

Re: LVREDUCE ONLINE

Miguel Carabano_1 — Fri, 25 Aug 2006 12:40:21 GMT

Hi team,

Thanks.

Done!!!

Miguel

Re: LVREDUCE ONLINE

Miguel Carabano_1 — Fri, 25 Aug 2006 12:41:22 GMT

Thanks