Automatic non-stop backup of coupling facility list structures containing shared queue messages
Original Publication Date: 2002-Aug-16
Included in the Prior Art Database: 2003-Jun-21
Introduction Disclosed is a technique for non-stop periodic backup by a parallel sysplex of recoverable shared queue messages held in a coupling facility list structure. The technique automatically initiates backups as often as necessary to enable data recovery from the backup and a message log within a specified time. Backups are more frequent when the system is busy and less frequent otherwise. The technique also exploits the multiple system images within the parallel sysplex to ensure that the regular backup cycle continues across system failures. Background Shared queue messages are stored as list entries in one or more coupling facility (CF) list structures. Applications running on multiple queue managers in the same queue sharing group (QSG) anywhere in a parallel sysplex can then access these shared queue messages. This provides continuous availability, scalable capacity, and automatic pull workload balancing.