[DRBD-user] lvm2, striping, and drbd

Michael Tewner tewner at gmail.com
Mon Aug 27 07:51:09 CEST 2007


Doesn't that setup seem somewhat obsessive?


On 8/27/07, Lars Ellenberg <lars.ellenberg at linbit.com> wrote:
> On Sun, Aug 26, 2007 at 06:00:16PM -0700, kbyrd-drbd wrote:
> >
> > I haven't used drbd yet, I'm getting ready to test and deploy it.
> > I've searched the archives I've seen various posts about md and
> > lvm2 and I know some of this has been covered. But, I'm confused
> > about the current state of things with 0.8
> >
> > I'd like something that feels like clustered RAID1+0 (that's
> > striping on top of drbd). My ideal plan: lvm2 striping on top of
> > four drbd pairs active/active pairs. I'd run GFS on top of this.
> > Do I need cLVM instead of LVM2 for this. Does LVM striping even
> > work with drbd?
>
> don't.
>
> DRBD does not (yet) support consistency bundling of several drbd.
> so whenever you have a connection loss, your four devices will
> disconnect in a slightly different order.
> consistency of your stripe set cannot be guaranteed.
>
> I also think you'd get better performance out of drbd on top of raid.
>
>
> --
> : Lars Ellenberg                            Tel +43-1-8178292-0  :
> : LINBIT Information Technologies GmbH      Fax +43-1-8178292-82 :
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