HP OpenVMS Systems

Cluster Application Design, Failover?

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The Question is:

 
How to set automatic failover of application in OpenVMS Cluster V7.3-1?
There are two DS20E machines in OpenVMS Cluster.
First is "a working node" which is is running applications and IDA database.
 Second node is used for development and testing. In case that first node fail
 of crash, second one have to automaticaly failover application. Is there a
 (Unix) CAA like way to do
 it?
 

The Answer is :

 
  OpenVMS applications can utilize comparatively primitive application
  fail-over, but can also easily provide for entirely parallel access.
 
  Failover can be implemented with batch jobs (restarts and related
  operations and support are available), with commercial or
  Freeware scheduling packages (see the FAQ), with the inherent
  process startup resulting from incoming network connections to
  cluster alias, and other approaches.
 
  Parallel access provides operations across multiple nodes within
  a cluster, typically using a protocol-specific cluster alias.
 
  Tru64 UNIX Cluster Application Availability (CAA) is most directly
  provided by a scheduling package, and various of these are available
  as commercial packages and as Freeware -- the OpenVMS FAQ has
  pointers.
 
  Ask The Wizard Topics: (2150), (1029), (391), likely others.
 
  Also (3531), (5870), (4602) and other topics provide supporting
  information.
 
  Batch (and print) queue-related lexical functions and DCL command
  procedures are discussed in various topics.
 
  Technical presentations on cluster application design tools and
  techniques are also available, as are the OpenVMS Programming
  Concepts and the Cluster manuals.
 

  

     

     
answer written or last revised on ( 30-NOV-2002 )
     
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