LVREDUCE ONLINE

[Miguel Carabano_1]

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.

[James R. Ferguson]

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...

[A. Clay Stephenson · Accepted solution]

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.

[Pete Randall]

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

[Miguel Carabano_1]

Hi,

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

[A. Clay Stephenson]

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.

[Miguel Carabano_1]

Hi team,

Thanks.

Done!!!

Miguel

[Miguel Carabano_1]

Thanks