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From: Michael Lausch <mla@lausch.at>
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Subject: Re: [linux-lvm] has anyone used LVM in a HA cluster?
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Date: Mon May 13 10:59:02 2002
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To: linux-lvm@sistina.com

Tim wrote:

> Or don't, and buy a power supply that you can control from serial, and
> do so -- STONITH, it's called -- Shoot The Other Node In The Head.  Onc=
e
> the power is off, there is no danger of fsck'ing...
>=20
> It's a rather elegant way to solve that problem, IMHO.
>=20
> We're going that route.
>=20

which may backfire, if both nodes think the other one is down (split=20
brain again) and start the shutdown procedure. okay, this is a very rare=20
situation, and may happen only under strange load and scheduling=20
parameters, but it will happen as any other "very rare situation"=20
happens ;-). especially in HA environments they seem to happen much more=20
often then in simple single point of failure environments ;-) you won'=C4=
t=20
loosew your filesystem, but the service is unavailable.