Abstract: An apparatus, system, and method for autonomously maintaining a single system image in a parallel systems complex. A computer program product causes the relevant systems in a parallel systems complex to receive requests with a global scope from a user. The request is sent to each IMS system in the sysplex, and each IMS system applies the resource information and logs the resource information for recovery. The request is written to a shared medium which IMS sysplex members can access. When an IMS member is brought online, the IMS member restores status information first from local recovery logs. The IMS member then checks the information against the global medium to determine if requests were issued while the IMS was offline. If so, the IMS inherits the information in the global medium before processing work. An IMS added into the sysplex applies the information from the global medium before processing work.

Abstract: An apparatus, system, and method for autonomously maintaining a single system image in a parallel systems complex. A computer program product causes the relevant systems in a parallel systems complex to receive requests with a global scope from a user. The request is sent to each IMS system in the sysplex, and each IMS system applies the resource information and logs the resource information for recovery. The request is written to a shared medium which IMS sysplex members can access. When an IMS member is brought online, the IMS member restores status information first from local recovery logs. The IMS member then checks the information against the global medium to determine if requests were issued while the IMS was offline. If so, the IMS inherits the information in the global medium before processing work. An IMS added into the sysplex applies the information from the global medium before processing work.

Abstract: A database management system is described. The system includes a computer storage medium having a primary storage medium and an overflow storage medium. The system also includes a manager for managing a plurality of data structures (queues) stored in the computer storage medium. The manager receives a request to store a data object in a target data structure. The manager determines whether an overflow mode condition currently exists. If an overflow mode condition does not currently exist, then the manager determines whether a combined size of all data structures stored in the primary storage medium plus a size of the data object is greater than a predetermined threshold. If a combined size of all data structures stored in the primary storage medium plus a size of the data object is greater than a predetermined threshold, then the manager enters an overflow mode.

Abstract: A computer program product comprising a computer useable medium having computer program logic recorded on it for enabling a processor in a computer system to interact with a shared storage medium comprising a ready queue is described and a staging queue. The computer program logic enables the processor to determine whether a data object is larger than available storage capacity of a working storage associated with an application. A public key is associated with the data object and is available to all applications.

Abstract: Described herein is a computer program product comprising a computer useable medium having computer program logic recorded thereon for enabling a processor in a computer system to manage a plurality of data structures stored in a computer storage medium. The computer storage medium includes a primary storage medium and an overflow storage medium. The computer program logic enables the processor to receive a request to store a data object in a target data structure, and enables the processor to determine whether an overflow mode condition currently exists. If it is determined that an overflow mode condition does not currently exist, then the computer program product enables the processor to determine whether a combined size of all data structures stored in the primary storage medium plus a size of the data object is greater than a predetermined threshold.