[linux-lvm] extending a logical volume

[Heinz J . Mauelshagen]

On Mon, Jan 21, 2002 at 07:33:31PM -0700, Andreas Dilger wrote:
> On Jan 21, 2002  12:40 -0600, lembark at wrkhors.com wrote:
> > The simplest way to handle it is unmounting, fsck-ing
> > and re-mounting the thing immediately after your weekly
> > backup, when users have to be off the system anyway
> > [if you want to tell me that the system is too important
> > to offline for a backup I'd strongly suggest finding a 
> > 9-story window near the console, it'll be easier to 
> > handle it yourself than have the users do it for you 
> > after a crash looses all of the data].
> 
> I agree about the backups.  Most people don't think about
> backups until it is too late.  I disagree about only doing
> resizing at some late hour in the night though.  Many times
> there are unexpected demands on storage, and the sysadmin
> doesn't have control over the cause, but gets blamed for
> the effect (i.e. running out of space).  Hence, online fs
> resizing is a critical operation for an enterprise system.
> 
> > Even HP's LVM -- probably the most forgiving of all -- 
> > has to be dismounted for extendfs; lvextend can be run
> > any time you like.
> 
> ???  That was only with the old HP LVM filesystem (UFS I think).  
> If you formatted with the new filesystem (can't remember the name),

Andreas,

they got a Veritas license for vxfs and that could be online grown but
you couldn't shrink it without purchasing an additional license.

> you could do online resizing.  AIX has had online resizing forever,
> and so has XFS.  None of these allow even offline shrinking though,
> which ext2/ext3 does.
> 
> Cheers, Andreas
> --
> Andreas Dilger
> http://sourceforge.net/projects/ext2resize/
> http://www-mddsp.enel.ucalgary.ca/People/adilger/
> 
> 
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-- 

Regards,
Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen at Sistina.com                           +49 2626 141200
                                                       FAX 924446
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