On 2013-05-14T09:54:55, David Vossel <dvos...@redhat.com> wrote:
> Here's what it comes down to. You aren't guaranteed exclusive
> activation just because pacemaker is in control. There are scenarios
> with SAN disks where the node starts up and can potentially attempt to
> activate a volume before pacemaker has initialized.
Yeah, from what I've read in the code, the tagged activation would also
prevent a manual (or on-boot) vg/lv activation (because it seems lvm
itself will refuse). That seems like a good idea to me. Unless I'm
wrong, that concept seems sound, barring bugs that need fixing.
That's similar to what cLVM2 does and protects against, but without
needing the cLVM2/DLM bits; that has, uhm, advantages too.
In short, I'm in favor of this feature. (Clearly, lge has pointed out
one or two issues that need fixing, that doesn't detract from the
idea.)
Regards,
Lars
--
Architect Storage/HA
SUSE LINUX Products GmbH, GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer, HRB
21284 (AG Nürnberg)
"Experience is the name everyone gives to their mistakes." -- Oscar Wilde
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