Abstract: A system for managing a cluster of nodes, the cluster comprising a plurality of groups of nodes, each node being associated with a vote, the system further comprising an arbitration device, the arbitration device being associated with a number of votes dependent on the number of nodes in the cluster, each node further being associated with a cluster manager, one of the cluster managers for each group being operable: if the group is in communication with the arbitration device, to determine whether the group has the greatest number of votes, including the votes of the arbitration device; if the arbitration device is operative, but the group is not in communication with the arbitration device, to determine whether the group meets the quorum without adjusting the quorum; and if the arbitration device is not operative, to determine whether the group meets the quorum after adjusting the quorum.

Abstract: A pathname translation method and system for translating a pathname that comprises one or more components (314). The system including a file system and an operation system (102); operable to perform pathname translation by searching for the components in a directory cache (308), and searching the file system for any in components not located in the directory cache (310); the directory cache contains pathname translations for substantially all of the directories in the file system.

Abstract: A data processing system and method for reallocating resources among execution environments of the system. The reallocation of resources being performed by monitoring the utilization of the resource to determine whether or not the utilization has a predetermined relationship with a utilization measure and thereby unacceptable and based upon this determination reassigning the resource associated with a first execution environment to a second execution environment. The utilization measure is associated with the load of the processor of the utilization of the memory.

Abstract: A system for managing a cluster of nodes, the cluster comprising a plurality of groups of nodes, each node being associated with a vote, the system further comprising an arbitration device, the arbitration device being associated with a number of votes dependent on the number of nodes in the cluster, each node further being associated with a cluster manager, one of the cluster managers for each group being operable: if the group is in communication with the arbitration device, to determine whether the group has the greatest number of votes, including the votes of the arbitration device; if the arbitration device is operative, but the group is not in communication with the arbitration device, to determine whether the group meets the quorum without adjusting the quorum; and if the arbitration device is not operative, to determine whether the group meets the quorum after adjusting the quorum.

Abstract: Embodiments of the present invention relate to a data processing system and method for using metadata associated with data to be retrieved from storage to identify further data to be retrieve at least a portion of that further data from the storage in accordance with a prefetch policy.