Compaq Parallel Database Cluster Model PDC/O2000 for Oracle8i and Windows 2000 Administrator Guide

3-8 Compaq Parallel Database Cluster Model PDC/O2000 for Oracle8i and Windows 2000 Administrator Guide
Compaq Confidential – Need to Know Required
Writer: John Blackburn Project: Compaq Parallel Database Cluster Model PDC/O2000 for Oracle8i and Windows 2000 Comments:
Part Number: 225082-002 File Name: d-ch3 Cluster Software Components.doc Last Saved On: 6/13/01 10:24 AM
Application Failover and Reconnection
Software
When a network client computer operates in a clustered environment, it must
be more resilient than when operating with a stand-alone server. Because a
client can access the database through any of the cluster nodes, the failure of
the connection to a node does not have to prevent the client from reattaching to
the cluster and continuing its work.
Oracle clustering software provides the capability to allow the automatic
reconnection of a client and application failover in the event of a node failure.
To implement this application and connection failover, a software interface
between the Oracle software and the client must be written.
Such a software interface would be responsible for detecting when the client’s
cluster node is no longer available and then connecting the client to one of the
remaining, operational cluster nodes.
NOTE: For complete information on how to ensure client auto-reconnect in an Oracle
Parallel Server environment, contact your Oracle representative.