HP 3000 Manuals HP 3000 Manuals
Silhouette A.01.00 by Gary Alvord--Commercial Systems Division Silhouette has been enhanced to use Network Inter-Process Communication (NetIPC) and Remote Process Management (RPM) services of NS/3000. Built into the Silhouette system startup routine is the ability to determine which data communication service to use: DS/3000 Program-to-Program (DS PTOP) for earlier data communication systems or NS/3000 NetIPC and RPM for newer systems using LAN/3000. One common version of Silhouette is required for all systems in the Silhouette network. NEW FEATURE TO HANDLE SECONDARY SYSTEM FAILURES This new Silhouette feature will provide more protection of data and easier recovery for Secondary system software failure events. To successfully recover Silhouette from Secondary system failures, all database, SAVE and logfiles must be logically intact and up-to-date after a system failure or halt. The SAVE file will also need to reflect all the most recent updates to the database. This feature will guarantee this recovery state and eliminate the need for doing Secondary database restores. However, enabling this feature may not be appropriate for some Silhouette environments. This feature will benefit customers in situations where Secondary database activity is low and the integrity of the database(s) must be guaranteed in the event of a secondary failure. Frequent Secondary system software failures is another situation which will benefit from enabling this feature. However, some Silhouette environments invoking this feature can sometimes greatly limit system performance on the Secondary system. High usage production environments may want to consult a Silhouette-Trained SE prior to using this feature. Steps for installation and recovery using this new feature is documented in the related article in the "Technical Articles" section in this Communicator. NEW SWITCH COMMAND OPTIONS New options for the SWITCH command have been implemented to provide the same flexibility as the RECOVER command. An option such as NOROLLBACK on a SWITCH can be particularly useful if a customer has their own utility to roll back incomplete transactions. For more detailed information, refer to the related article in the "Technical Articles" section in this Communicator.