초록 ▼

A Space Management System for a Data Access System of a File Access Processor for servicing requests from a set of Application Support Processors, which can exist in a global network, with each Application Support Processor sharing access to data in files stored by the File access Processor. The Fil

A Space Management System for a Data Access System of a File Access Processor for servicing requests from a set of Application Support Processors, which can exist in a global network, with each Application Support Processor sharing access to data in files stored by the File access Processor. The File Access Processor manages access to a set of data files and information about files held in file directories, which allow for managing file collections, can relate to each other hierarchically, and may be shared. Each Application Support Processor also maintains therein an internal cache of file information to improve performance by reducing communications required with the File Access Processor for informatin about files. The File Access Processor provides the Application Support Processors with information for updating and maintenance of local caches of directory and file description information through a centralized accumulation and distribution of cache change notifications. The Space Management System manages file space assigned to each Application Support Processor and supports the space management functions of, adding space, deleting space, setting thresholds for limit warnings, querying space, charging space used, warning notifications, crediting space freed, and permitting file spaces to be shared by more than one application suppoort processor.

대표청구항 ▼

A method of managing file space in a data access system which provides shared file access to a plurality of application support processors, comprising the steps of: keeping in a space catalog the various file space parameters associated with each logical file space assigned to a particular applicati

A method of managing file space in a data access system which provides shared file access to a plurality of application support processors, comprising the steps of: keeping in a space catalog the various file space parameters associated with each logical file space assigned to a particular application support processor; creating a file space control block that information which relates to said logical file space in order to help coordinate changes which affect the amount of file space needed; building work request blocks o keep track of changes in file space consumption caused by work unit routines generated by one of the application support processors; in the event of a successful completion of a work unit routine, performing a commit operation by transferring the changes in file space consumption from the work request blocks to the space catalog as well as to the appropriate file space control block.