[Info-vax] Distributed and Clustered App Design

[Dave Froble]

On 1/5/2021 9:33 AM, Jan-Erik Söderholm wrote:

> Yes, a VMS-cluster needs a lot of bits and pieces just to run in itself.
> That does not mean that all application today needs the same features.
> Not even an application that "used" a cluster 20-30 years ago.

When first introduced VMS cluster was to some extent a method to add 
compute resources, just as adding disk drives added storage resources. 
Not exclusively, but a major thing, then.  Later other reasons to use 
VMS cluster rose in significance, and as compute capabilities got 
better, the "add compute resources" became less important.

The reasons to use VMS cluster has changed over time, and is still changing.

I had a customer with a room full of VAX 11/780 systems, six I believe, 
in a VMS cluster configuration.  Being in one room, disaster tolerance 
was obviously not a desired configuration.  That was then.


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David Froble                       Tel: 724-529-0450
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