Abstract: A computer-implemented method according to one embodiment includes receiving a request to add a generic volume entry to a generic volume element list, storing the generic volume entry in the generic volume element list in a SMS configuration in a SCDS, and building a volume list definition of the SMS configuration. A unit control block chain is parsed for determining additional specific volumes. It is determined whether a specific volume found in the parsing was not used in the building. In response to a determination that the specific volume found in the parsing was not used in the building, it is determined, for the specific volume found in the parsing, whether at least one predetermined condition is met. The specific volume found in the parsing is added to the volume list definition in response to a determination that the at least one predetermined condition is met.

Abstract: A computer-implemented method according to one embodiment includes receiving a request to add a generic volume entry to a generic volume element list, storing the generic volume entry in the generic volume element list in a SMS configuration in a SCDS, and building a volume list definition of the SMS configuration. A unit control block chain is parsed for determining additional specific volumes. It is determined whether a specific volume found in the parsing was not used in the building. In response to a determination that the specific volume found in the parsing was not used in the building, it is determined, for the specific volume found in the parsing, whether at least one predetermined condition is met. The specific volume found in the parsing is added to the volume list definition in response to a determination that the at least one predetermined condition is met.

Abstract: An apparatus, system, and method are disclosed for preserving cluster level serialization during file server serialization reinitialization. The apparatus includes a permission request module, a cluster negotiation module, and a completion notification module. The permission request module communicates a permission request to a remote file server in anticipation of a reinitialization of a local file server. The cluster negotiation module implements a reinitialization protocol on the remote file server during the reinitialization of the local file server. The completion notification module notifies the remote file server when the reinitialization of the local file server is complete. The apparatus, system, and method beneficially facilitate continued serialization negotiation among the remote file servers during the reinitialization of the serialization data on the local file server and, thereby, preserve the integrity of shared data resources.

Abstract: An apparatus, system, and method are disclosed for suspending a data access request during serialization reinitialization of a file server. The apparatus includes a request recognition module, an availability module, and a suspension module. The request recognition module recognizes a request to be processed by a file server. The availability module determines if the file server is available. The suspension module suspends the data access request if the file server is not available due to serialization reinitialization. In one embodiment, the suspension module implements a hardware interrupt delay loop to suspend an interruptible data access request, such as an application request. In another embodiment, the suspension module queues a non-interruptible data access request and notifies the operating system, for example, that the non-interruptible request has been initiated.

Abstract: An apparatus, system, and method are disclosed for reinitializing serialization data in a file server. The apparatus includes a failure recognition module, a discard module, and a serialization module. The failure recognition module recognizes a file system serialization failure on a file server. Upon recognition of the serialization failure, the discard module discards existing serialization data located in a first memory address space, such as a file server address space. In certain embodiments, the entire file server address space may be destroyed by the operating system. The serialization module then generates new serialization data from existing connection/position data. The connection/position data is located in a second address space, such as a client address space, that is maintained during the serialization reinitialization process.

Abstract: An apparatus, system, and method are disclosed for preserving connection/position data integrity during reinitialization of serialization information in a file server. The apparatus includes a completion rights module, a completion termination module, and a postponement module. The completion rights module grants a completion right to a sensitive process, which is characterized by an associated period of data instability. The completion termination module terminates a grant of the completion right to the sensitive process in anticipation of a reinitialization of a file server. The completion right may be terminated after the connection/position data is stable or, if necessary, in response to completion of a time out period. The postponement module postpones the reinitialization of the file server and the serialization information until after the completion rights are terminated.

Abstract: Aspects for data sharing across batch sequential processes and on-line transactional processes in a clustered arrangement of multiple data processing systems are described. In a method aspect, the method includes performing on-line transaction process accesses and batch sequential process accesses on record data. The method further includes utilizing a dual-level locking protocol for the on-line transaction process accesses and batch sequential process accesses to achieve substantially concurrent accessibility to the record data with minimized processing overhead for the batch sequential processes.

Abstract: Aspects for data sharing across batch sequential processes and on-line transactional processes in a clustered arrangement of multiple data processing systems are described. In a method aspect, the method includes performing on-line transaction process accesses and batch sequential process accesses on record data. The method further includes utilizing a dual-level locking protocol for the on-line transaction process accesses and batch sequential process accesses to achieve substantially concurrent accessibility to the record data with minimized processing overhead for the batch sequential processes.

Abstract: Aspects for data sharing across batch sequential processes and on-line transactional processes in a clustered arrangement of multiple data processing systems are described. In a method aspect, the method includes performing on-line transaction process accesses and batch sequential process accesses on record data. The method further includes utilizing a dual-level locking protocol for the on-line transaction process accesses and batch sequential process accesses to achieve substantially concurrent accessibility to the record data with minimized processing overhead for the batch sequential processes.

Abstract: The present invention discloses a method, apparatus, article of manufacture, and memory for providing data manipulation capabilities in a distributed processing complex comprised of multiple interconnected and coordinated computer systems. In accordance with the present invention, a data set is allocated in a data storage device coupled to the computer systems and the data set is logically subdivided into system chapters, a sysplex chapter, a table of contents, and a header. System data is stored in the system chapters. Shared data is stored in the sysplex chapter. Chapter location information that points to locations for the system chapters and the sysplex chapter is stored in the table of contents. Table of contents location information that points to a location of the table of contents is stored in the header.