[Linux-cluster] Which APC fence device ?

[Eric Kerin]

On Wed, 2005-08-10 at 11:01 -0400, Greg Forte wrote:
> Eric Kerin wrote:
> > On Wed, 2005-08-10 at 10:20 -0400, Greg Forte wrote:
> > 
> >>There was a message on this list in January to the effect of "does APC 
> >>7900 work with fence_apc?" / "I think so ...".
> >>
> >>Has anyone confirmed this?
> > 
> > 
> > I'm using them in my cluster, they work well with the fence_apc agent.
> > 
> > The only caveat is that the agent won't work if you use outlet groups
> > for cluster nodes, without a few changes to the agent.  I can give you
> > my modified version if you want to use outlet groups for cluster nodes.
> > (A patch will be coming that will work with both port group and non-port
> > group modes, but I haven't had a chance to write it up yet.)
> 
> Great, thanks.
> 
> I'm new to this sort of hardware, not sure exactly what you mean by 
> "outlet groups", could you elaborate?
> 
It's a feature on the APC 7900 that will allow a single command to one
7900 to automatically turn off/on ports on other 7900s via the network.
I use it to turn off both power supplies on my cluster nodes at once,
while still providing redundant paths for power.

Eric