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The Question is:
How to create a socket connection between a client and a virtual server
composed of two OpenVMS nodes running in cluster, being the server socket
application in one of the nodes in a hot-standby status?
Thanks in advance
The Answer is :
You appear to be applying some familiarity or some assumptions acquired
from another operating system to the OpenVMS environment, and this
approach is not always appropriate.
An OpenVMS Cluster nor OpenVMS itself does not directly provide the
concept of a hot-standby system or a hot-standby application -- this
hot-standby configuration would be a subset of the shared-access
capabilities that are more typically seen.
In the most common case, a client encountering a failed connection is
simply coded to perform any needed DNS or other lookup, and then attempt
to reconnect to the cluster, typically connecting via the cluster alias.
Applications such as a flock of webservers operating in parallel in a
cluster provides an example of a more distributed configuration -- it
doesn't really matter which webserver on which cluster member receives
and fields the http request, the core data and the webpage files are
all available to all of the cluster members and all of the webservers.
Relevent topics can include the distributed lock manager, distributed
name services, the file system, and communications tools such as RTR
and any of the various available middleware.
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