Resurrected - Re: [Linux-ha-dev] [RFC] STONITH in the new framework

Andrew lists at beekhof.homeip.net
Tue Jun 22 07:41:31 MDT 2004


Just wondering if there are still lingering doubts over the "fencing as 
a resource" approach as the time for implementing something is fast 
approaching.

Andrew

On 2004-01-16 15:02:52, Lars Marowsky-Bree wrote:
> On 2004-01-16T07:28:04, Alan Robertson <alanr at unix.sh> said:
>
> > I REALLY want it to be the same as a regular resource.  It's 
> promising, but
> > I'm not 100% sure yet.
>
> It's as close to a regular resource as I think it will be. I've thought
> about a few ways to make it 100% the same, but I think that's forcing 
> it
> into a model for the sake of it, where the minor deviation from the
> model is better tolerated because it is just simply different.
>
> (Akin to treating replicated resources properly too.)
>
> Resource-level fencing is 100% the same (it's either happening
> automatically within the specific resource type anyway, or in the case
> of SCSI_Reservations, pulled out into a separate resource type if it
> makes sense). Node granularity fencing is slightly different, but from
> the LRM perspective, very little so, and obviously the policy engine
> needs to treat it differently.
>
> If we can't reach a 100% agreement already, that might be because we
> can't tell 100% yet, and we might just need to go down one path and 
> see.
> We can always make adjustments.
>
> > I'm also not 100% sure we're communicating on the same wavelength
> > completely.  After all, we agreed ;-)
>
> That sure is a bad sign ;-)
>
> > I think I need to mull over some of the details some more before I'm
> > willing to say that...
>
> Please do, I'm looking forward to your feedback.
>
>
> Sincerely,
>     Lars Marowsky-Brée <lmb at suse.de>
>
> -- 
> High Availability & Clustering	      \ ever tried. ever failed. no 
> matter.
> SUSE Labs			      | try again. fail again. fail better.
> Research & Development, SUSE LINUX AG \ 	-- Samuel Beckett
>
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