On 2005-05-21T09:29:01, Robert Wipfel <rawipfel@xxxxxxxxxx> 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@xxxxxxx>
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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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