[DRBD-user] Detection of Logical Volume on nested LVM

Lars Ellenberg lars.ellenberg at linbit.com
Tue Mar 9 15:09:25 CET 2010

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

On Tue, Mar 09, 2010 at 11:39:34AM +0100, Olivier LAMBERT wrote:
> Hmmm. I like riddles, so I'm going to google this. Is there any simple
> solutions, in example force drbd to deal with that ?

You need to "force" your application stuff (and, yes, in this context
lvm is an application) do deal with that, and cLVM would be the means
to do that, i.e. coordinate.  Possibly you even need to start earlier,
and fix your iSCSI target configuration.

There is nothing to force DRBD to do in this context.
It just replicates whatever you write to it, no more, no less.

If you have caches on "the way" to "the other client"
that happen to happily cache stale content (are "incoherent"),
there is nothing DRBD can do about it.

: Lars Ellenberg
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com

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