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Re: [Linux-cluster] Cluster.conf



On Wed, 2006-10-11 at 16:48 +0200, Jos Vos wrote:
> On Wed, Oct 11, 2006 at 09:36:39AM -0500, isplist logicore net wrote:
> 
> > Suggestion;
> > 
> > How about some examples for us folks who get a better sense of how things work
> > by seeing it :). 
> 
> Yes, agreed, that is what's missing.  Also the total picture (how the
> algorithm of cman - with/without communication with qdiskd - works
> w.r.t. votes, scores, etc. works) is not described very well (well,
> that's an understatement :-)).

You're right, it's not.  It explains voting restrictions when
configuring qdisk, but... not *why*... e.g.:

   * Cluster node votes should be more or less equal.
   ...
   * The total number of votes assigned to the quorum device should be
     equal to or greater than the total number of node-votes in the
     cluster.  While  it is possible to assign only one (or a few) votes
     to the quorum device, the effects of doing so have not been
     explored.

CMAN has no knowledge of qdisk's internal "score" information nor its
heuristics, or even how it works.  I should make a note of that.

-- Lon



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