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Communicator e3000 MPE/iX Release 7.5 (Software Release C75.00): HP e3000 MPE/iX Computer Systems > Chapter 5 Technical Articles
Announcing Heartbeat High Availability Cluster/iX |
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By Walter McCullough Cluster/iX for the HP e3000 is an orderable product that allows the user to create a multiple server configuration with any HP-supported dual-ported array to form a non-complex high availability cluster. The new Heartbeat enhancement allows the user to create job scripts to automatically control the switchover process in the event that the primary cluster server aborts or its access to the data becomes unavailable. The Beat and Listen commands have been incorporated into the Cluster/iX SXOUtil program to allow the user to set up job scripts on the both the primary and secondary systems. The primary system's job script is responsible for calling the Beat command. This command causes the job to wait indefinitely while it "beats" the heartbeat counter on the cluster volume set owned by this system. The secondary system is responsible for incorporating a Listen command in its job script that monitors the heartbeat counter on the cluster volume set. In the event that the heartbeat stops, the secondary system can detect this change and, depending on the job script, change the ownership of the cluster volume set, open it and restart the application for users to access from the secondary system. Users who require a non-complex high availability solution that allows the users to access business critical data from a secondary system within seconds of the primary system experiencing an outage should use Cluster/iX. The Cluster/iX solution addresses machine outages typically caused by:
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