Abstract:
PROBLEM TO BE SOLVED: To improve the availability of an entire group, in a computing system group for maintaining a redundant resource at a geographically dispersed location. SOLUTION: For managing a resource in a node operating as one portion of the computing system group that is dispersed geographically, the resource is configured regarding the usage, the availability of the resource is inspected regarding a resource pool, and one of them is selected. The resource includes at least one disk unit which is configured as a disk pool for switching the resource pool. Additionally, the availability of each disk unit is ranked regarding the resource pool, and at least one valid disk unit is selected. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
A clustered computer system, apparatus, program product and method utilize a group member-initiated shutdown process to terminate clustering on a node in an automated and orderly fashion, typically in the event of a failure detected by a group member residing on that node. As a component of such a process, node leave operations are initiated on the other nodes in a clustered computer system, thereby permitting any dependency failovers to occur in an automated fashion. Moreover, other group members on a node to be shutdown ar e preemptively terminated prior to local detection of the failure within those other group members, so that termination of clustering on the node may be initiated to complete a shutdow n operation.
Abstract:
An apparatus, program product and method initiate a restart of a node in a clustered computer system using a member of a clustering group that resides on a different node from that to be restarted. Typically, a restart operation is initiated by the member in response to a membership change message sent by another group member that is resident on the node to be restarted, with an indicator associated with the membership change message that indicates that a restart should be initiated. Typically, the restart is implemented in much the same manner as a start operation that is performed when a node is initially added to a cluster, with additional functionality utilized to preclude repeated restart attempts upon a failure of a prior restart operation.