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![]() HP OpenVMS Systemsask the wizard |
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The Question is: TCP/IP Services for OpenVMS 5.0A DNS Have the load broker installed, works fine for our 4 node cluster. Is there a utility available to do dynamic updates to our DNS ourselves? An application that uses mailboxes on the system side and TCP service to open it to the net could be running on only one node of the cluster, as mailboxes are not cluster wide. It would be nice to create a resource record in DNS dynamically to point to the node the mailbox communication would be successful. The Answer is : For details on DNS/BIND (and particularly ISC BIND 8.1.2), please see the TCP/IP Services documentation, including the release notes. Dynamic updates (RFC 2136) are permitted, though the security mechanism described in RFC 2137 is not supported. Within an application, the lock manager can be used to communicate this information cluster-wide -- specifically, a value block. If the goal is the detection of the mailbox or the bind path within an OpenVMS Cluster, The OpenVMS Wizard would typically use the lock value block -- as it provides the information you seek, and can also be used to provide an interlock that will permit one and only one primary application to be running at a time. (With OpenVMS V7.2 and later, the available ICC mechanism might be the best choice within a cluster.)
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