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386 Appendix D
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.