Re: [linux-lvm] Problems and questions with LVM on a large raid system.

From: "Heinz J . Mauelshagen" <mauelshagen@sistina.com>
To: linux-lvm@sistina.com
Subject: Re: [linux-lvm] Problems and questions with LVM on a large raid system.
Date: Tue Mar 18 03:14:02 2003	[thread overview]
Message-ID: <20030318101206.D30525@sistina.com> (raw)
In-Reply-To: <20030315223607.GA16976@gw.silicide.dk>; from jon+lvm@silicide.dk on Sat, Mar 15, 2003 at 11:36:07PM +0100

On Sat, Mar 15, 2003 at 11:36:07PM +0100, jon+lvm@silicide.dk wrote:
> On Sat, Mar 15, 2003 at 01:59:59PM -0600, Steven Lembark wrote:
> > 
> > 
> > -- Jon Bendtsen <jon+lvm@silicide.dk>
> > 
> > >>> that depends. You can stripe the lvm, but then you cant resize it.
> > >>> if you made a LV, then it would proberly just allokate all on one
> > >>> "disk", aka sda, and then on sdb.
> > >>
> > >>    I'm using 100% of the VG for the same LV.
> > >>
> > >>    I'm fine with not being able to resize it. Do I need the MD stuff to
> > >>    stripe it?
> > >
> > >No. You can stripe using the LV system. But i would think that
> > >if you can shutdown the LV, then you might as well stop the VG,
> > >and do it on the raw device. (except this isnt as future proof
> > >as a LVM system is).
> > 
> > Nor as flexable: with LVM you can easily grow the LV's, with
> > out LVM you are stuck with fixed partitions.
> 
> that would be included in being future proof ;-D
> Besides, he wants to stripe it, and you cant extend a stripped
> LV (as far as i know).

Yes, you can.

Stripes are linited by the physical volume size in LVM1 though and the only way
to grow a striped LV there is to pvmove the stripe to a larger PV and extend
the LV afterwards.

LVM2 doesn't have such constraint any longer :)

> 
> 
> 
> JonB
> 
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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@Sistina.com                           +49 2626 141200
                                                       FAX 924446
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