EXTENT-LEVEL RESERVE AND RELEASE FOR A DIRECT ACCESS STORAGE DEVICE (DASD) VOLUMES

摘要

In one embodiment, a computer program product for managing a reserve command includes a computer readable storage medium having program code embodied therewith, the program code readable and/or executable by a processor to receive, by the processor, a request to access a data set on one or more volumes of at least one direct access storage device (DASD), the request including a reserve command, and each of the one or more volumes including a consecutive set of one or more tracks of the at least one DASD, and reserve one or more extents of the at least one DASD while reserving less than a volume of the at least one DASD and not allowing any other entity than an entity which requested the reserve to access the one or more extents of the at least one DASD that have been reserved.

主权项

1. A computer program product for managing a reserve command, the computer program product comprising a computer readable storage medium having program code embodied therewith, the program code readable and/or executable by a processor to cause the processor to:
receive, by the processor, a request to access a data scion one or more volumes of at least one direct access storage device (DASD), wherein the request includes a reserve command, and wherein each of the one or more volumes includes a consecutive set of one or more tracks of the at least one DASD; and reserve, by the processor, one or more extents of the at least one DASD, wherein less than a volume of the at least one DASD is reserved, and wherein the reserve does not allow any other entity than an entity which requested the reserve to access the one or more extents of the at least one DASD that have been reserved.