From: HAUTECOEUR Bruno (HAUTECOB@ESSILOR.fr)
Date: Thu Jun 27 2002 - 08:28:48 EDT
Here is the final summary ...
________________
Bruno HAUTECOEUR
Architecte système Unix
DSI / Architecture Technique - Essilor International
Tel: 33 (0)1 48 98 73 20 / Fax: 33(0)1 49 56 20 56
mail: hautecob@essilor.fr
-----Message d'origine-----
De: Stefan Farrelly [mailto:Stefan.Farrelly@btinternet.com]
Date: jeudi 27 juin 2002 11:33
À: HAUTECOEUR Bruno
Objet: Re: [HPADM] Re: decreasing /var online [SUMMARY]
Hi Bruno,
Do you have the later version 3.3 of OnlineJFS though ? To check do
swlist -l bundle, you should see;
B3929BA B.11.00 HP OnLineJFS (Advanced VxFS)
B3929CA B.03.03 JFS 3.3 Filesystem For 11.00
B3929CA-fndation B.11.00 Foundation Patch Bundle for JFS
3.3
This means you have JFS 3.3 and can do an online reduce. If so simply
do;
fsadm -b <newsize in MB*1024> /var
lvreduce -L <new size in MB> /dev/vg00/lvol8
Make sure the fsadm command works first, it should report that there are
some PE's in use on the part of the lvol you are trying to reduce and it
will tell you it its attempting to move them out of the way first, this
may take some time but it should work fine.
Even if you dont have the later version of OnlineJFS 3.3 installed you
can attemtp the above fsadm command with the older version of OnlineJFS
(just much more chance it will fail), you may get lucky and it will work
if no PE's are in use on the part of the lvol you are trying to reduce,
then you can do the lvreduce.
Cheers,
Stefan
HAUTECOEUR Bruno wrote:
>
> Hi Stefan,
>
> well, what a great new for me :)
>
> could you give me the syntax to decrease le lvol with fsadm please (i know
> how to increase but not to decrease ... never need that before ...).
> OnlineJfs is already installed on the server.
>
> TIA
>
> ________________
> Bruno HAUTECOEUR
> Architecte système Unix
> DSI / Architecture Technique - Essilor International
> Tel: 33 (0)1 48 98 73 20 / Fax: 33(0)1 49 56 20 56
> mail: hautecob@essilor.fr
>
> -----Message d'origine-----
> De: Stefan Farrelly [mailto:Stefan.Farrelly@btinternet.com]
> Date: jeudi 27 juin 2002 11:08
> À: HAUTECOEUR Bruno
> Objet: Re: [HPADM] Re: decreasing /var online [SUMMARY]
>
> Hi Bruno,
>
> Im afraid the reply below does NOT make sense.
>
> 1. With online JFS installed version 3.3 you CAN use fasdm to reduce a
> filesystem online (ie. without unmounting it). fsadm will move out of
> the way any PE's which are on the part of the lvol you want to reduce.
> We use it here, it works a treat.
>
> 2. The statement below that you have to run lvreduce after fsadm and
> that this is possible when the lvol is unmounted and with onlinejfs
> installed ISNT correct. With online jfs installed you DO NOT need to
> unmount the filesystem - you fsadm it then lvredcue it - all on the fly,
> no need to unmount. Again, weve done this tons of times successfully.
>
> Cheers,
>
> Stefan
> HP Outsourcing
> HP UK
>
> HAUTECOEUR Bruno wrote:
> >
> > Hi gurus,
> >
> > here is the very clear answer from Eef Hartman:
> >
> > No.
> > Fsadm only reduces the FILE system in the logical volume. So it reduces
> the
> > amount of space in the fs, but it does NOT free PE's for use by another
> > lvol,
> > you have to run lvreduce AFTER the fsadm (and of course, this is only
> > possible
> > when the volume is UNmounted and with Online VxFs installed).
> >
> > The volume is like a partition, a Physical amount of storage, the FS is
a
> > higher level structure imposed ON that storage.
> >
> > PS: without VxFS you even loose all of the FS data in the lvol when you
> > lvreduce it, as there is nu way to tell the file system that it now has
> less
> > storage to work with, so you then have to run newfs again to create a
NEW
> > file system in the smaller volume.
> >
> > I finally decided to mv the FS to another vg.
> >
> > rgds,
> > ________________
> > Bruno HAUTECOEUR
> > Architecte système Unix
> > DSI / Architecture Technique - Essilor International
> > Tel: 33 (0)1 48 98 73 20 / Fax: 33(0)1 49 56 20 56
> > mail: hautecob@essilor.fr
> >
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