Patch to add stonith support to multiple apcmasterswitches <apcmultiplemastersnmp>

[Lars Marowsky-Bree]

On 2002-10-15T14:03:16,
   Martin Bene <martin.bene@icomedias.com> said:

> And a real problem here - the advantage you get from redundant power supplies
> on a per-node view is obviously greatly increased by using different power
> circuits (seperate UPS which in turn is fed off a seperate circuit). you lose
> that by going via one power switch.

Yes.

Unless of course you use something like the WTI NPS-230, which has two power
circuits. Of course, they are still controlled via the same logic board, but
the relays are very unlikely to fail, ie either you reach the switch or you do
not, which means you can "cascade" them serially.

> Are there stonith devices that can trigger a system reset (i.e be connected
> as a reset switch) instead of switching the power supply? If no - is there a
> good reason why something like that would be a bad idea?

No. Actually that is a rather good idea, and can be done via (for example) the
IPMI interfaces; some vendors also integrate proprietary extensions for
management boards.

We just do not have drivers for them.

And, of course, you cannot cascade them well.


Sincerely,
    Lars Marowsky-Brée <lmb@suse.de>

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