Thank you for the explanation. Your response is another example of
the first rate help and education that this list provides - from
detailed computer theory to the more mundane, it is one of the finest
sources for help. It would appear that a compilation and editing of 
many of the submissions would provide the content for an introductory 
textbook for VistA users.  

> The concept of HL7 ping was for one Vista client system to verify that a
> remote Vista listener was up and configured properly on the node and
> port defined on the client system. When the high level ping fails, the
> client makes a call to DNS to see if the Vista listener has been moved
> to another node. If DNS returns a list of nodes, each node is pinged in
> sequence. If there is a successful connection on an alternate node, the
> client's local database is updated with the new information. The key is
> to have DNS contain all possible nodes that a listener could run on.
> That way the listener can be moved to a different server when the
> original one is taken out of service.
> 
> 
> John Clemens
> Mon-Fri, 0730-1600 phone 650.464.7585 (personal cell)
 
-- 
Ismet B. Kursunoglu, MD, FCCP

 Medical Director
 Alaska Clinic, LLC
 3750 E. Country Field Circle, STE B
 Wasilla, Alaska 99654-6659
 [EMAIL PROTECTED]
 voice (907)357-7240


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