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List:       redhat-linux-cluster
Subject:    [Linux-cluster] Re: [Clusters_sig] Re: [ANNOUNCE] Linux Cluster
From:       Lars Marowsky-Bree <lmb () suse ! de>
Date:       2005-05-31 10:26:24
Message-ID: 20050531102624.GT17565 () marowsky-bree ! de
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On 2005-05-21T09:29:01, Robert Wipfel <rawipfel@novell.com> wrote:

> outside looking in, is web services an!  d grid.  Returning to the
> reality of many vendor's enterprise* business, the suitespot for h/a
> clusters still seems to be somewhere around ~8 dual-CPU nodes with
> many customers deploying multiple similar clusters. Nodes are never in
> multiple clusters at once, rather, individual nodes are members of a
> cluster and that cluster might be a member of a cluster of clusters.

A single node must be big enough to support sane load balancing; ie, big
enough to run at least one (or more) "whole" resource entities / jobs.

That is the breaking point after which it is more sensible to deploy
more nodes - with looser coupling - than making a single node / SSI
component larger, because decoupled operation means less complexity for
fault isolation.


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

-- 
High Availability & Clustering
SUSE Labs, Research and Development
SUSE LINUX Products GmbH - A Novell Business	 -- Charles Darwin
"Ignorance more frequently begets confidence than does knowledge"

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