Using SNAplus2 in a High Availability Environment

Advanced Configuration Techniques

quits trying to perform a local restart of the Token Ring LS, and attempts to start the SDLC LS. When that LS fails, the script exits, to allow ServiceGuard to perform a remote failover.

Notice also that this solution does not provide the best level of application transparency. Since two different SNAplus2 LSs are being used on this server, each application must have the ability to access LUs that are configured for each LS. For 3270, 3179G, and LUA, LU pools are often his will add more redundancy to your network and reduce even further used for this purpose. APPC transaction programs would need to be designed and coded to be able to communicate with a remote TP over multiple LUs.

Local recovery is an excellent complement to the remote failover functions provided by ServiceGuard. By adding local restart and local failover commands to your customized Package Control Script, you equip your SNAplus2 server for maximum uptime in a high availability environment.

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Appendix D