Messages in this thread | | | Date | Tue, 31 May 2005 12:26:24 +0200 | From | Lars Marowsky-Bree <> | Subject | Re: [Clusters_sig] Re: [ANNOUNCE] Linux Cluster Summit 2005 |
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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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