[Pacemaker] Multi-site support in pacemaker (tokens, deadman, CTR)

[Andrew Beekhof]

On Thu, May 12, 2011 at 1:40 PM, Lars Marowsky-Bree <lmb at suse.de> wrote:
> On 2011-05-03T08:28:06, Andrew Beekhof <andrew at beekhof.net> wrote:
>
> Sorry for the late reply. I missed that there actually was one open
> detail still.
>
>> >> Question though... what about no-quorum-policy=ignore ?
>> > That was implicit somewhere later on, I think. The CTR must be able to
>> > cope with multiple partitions of the same site, and would only grant the
>> > T to one of them.
>> But you'll still have a (longer) time when both partitions will think
>> they own the token.
>> Potentially long enough to begin starting resources.
>
> No. Because starting/acquiring the resources would still depend on a
> "local" fence of the other side. This is protected against by our
> regular dependencies already.
>
> Or am I missing something still?

Possibly.
Couldn't both sides start shooting each other until one looses the token?

>
>
> Regards,
>    Lars
>
> --
> Architect Storage/HA, OPS Engineering, Novell, Inc.
> 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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