1
Dennis R Konrad, Ralph E Sipple: Data base backup and recovery system and method. Unisys Corporation, LeRoy D Maunu, Charles A Johnson, Mark T Starr, April 4, 1995: US05404508 (180 worldwide citation)

A system and method for maintaining a backup data base. An initial backup copy of a data base is made and stored separate from an active primary data base. Each time the primary data base is updated, audit information pertaining to the data base update is stored in non-volatile storage. A recovery p ...


2
Donald T Bordsen, Thomas P Cooper, Robert F Esson, Michael J Hill, John R Jordan, Joseph E Kessler, Dennis R Konrad, Ralph E Sipple, Robert E Swenson, James F Torgerson, Anthony P vonArx: Cache memory with data compaction for use in the audit trail of a data processing system having record locking capabilities. Unisys Corporation, Glenn W Bowen, Mark T Starr, March 9, 1993: US05193162 (66 worldwide citation)

A multiprocessor data processing system is implemented with processors, each of which may request for a temporary time the exclusive lock on an object which is stored on a data base. To achieve this a lock processor synchronizes the locking and unlocking of the objects. The requesting processor dire ...


3
Ralph E Sipple, Thomas P Cooper, Dennis R Konrad, Michael J Heideman: Dual XPCS for disaster recovery. Unisys Corporation, Charles A Johnson, Mark T Nawrocki Rooney & Sivertson P A Starr, September 7, 1999: US05949970 (45 worldwide citation)

A data processing system including a first and second host, a first and second outboard file cache connected to the first host, and a first and second secondary storage device connected to the first host. The system operation includes the first host reading file data from the first or second seconda ...


4
Thomas P Cooper, Michael J Hill, Dennis R Konrad, Thomas L Nowatzki: XPC backup for in-process audit. Unisys Corporation, Charles A Johnson, Mark T Nawrocki Rooney and Sivertson P A Starr, June 20, 2000: US06079000 (25 worldwide citation)

Method and apparatus for providing backup memory storage for audit trail data within a computer system having a main memory storage, a non-volatile memory storage, and backup memory storage. The computer system executes a number of transaction programs which generate audit trail entries. As the audi ...


5
Thomas P Cooper, Michael J Hill, Dennis R Konrad, Thomas L Nowatzki: Method and apparatus for block-level auditing and database recovery in a transaction processing system. Unisys Corporation, Charles A Johnson, Mark T Starr, October 28, 1997: US05682527 (16 worldwide citation)

A transaction processing audit and recovery system is disclosed. After processing a transaction, an audit manager logs in audit records only changed blocks of data of a segment of a database. Upon failure of database backing storage, a prior copy of the database is reloaded to database backing stora ...


6
Michael J Heideman, Dennis R Konrad, David A Novak: Method for distributing the processing among multiple synchronization paths in a computer system utilizing separate servers for redundancy. Unisys Corporation, Charles A Johnson, Mark T Starr, Nawrocki Rooney & Sivertson P A, February 20, 2007: US07181642 (15 worldwide citation)

An apparatus for and method of enhancing throughput within a cluster lock processing system having a relatively large number of commodity cluster instruction processors which are arranged in redundant fashion to improve reliability. Because the commodity processors have virtually no system viability ...


7
Craig B Johnson, Dennis R Konrad, Michael C Otto: Method and apparatus for disk cache translation between systems. Unisys Corporation, Charles A Johnson, Mark T Starr, Crawford Maunu PLLC, June 1, 2004: US06745266 (13 worldwide citation)

A disk cache translation system for mapping data record lengths between systems having different data record lengths. Command queue (


8
Michael J Heideman, Dennis R Konrad, David A Novak: Method for shortening the resynchronization time following failure in a computer system utilizing separate servers for redundancy. Unisys Corporation, Beth L McMahon, Charles A Johnson, Nawrocki Rooney & Sivertson P A, July 17, 2007: US07246255 (12 worldwide citation)

An apparatus for and method of enhancing reliability within a cluster lock processing system having a relatively large number of commodity cluster instruction processors which are managed by a cluster lock manager. Because the commodity processors have virtually no system viability features such as ...


9
Thomas P Cooper, Michael J Hill, Dennis R Konrad, Thomas L Nowatzki: Shared file allocation and release. Unisys Corporation, Charles A Johnson, Mark T Nawrocki Rooney & Sivertson P A Starr, April 25, 2000: US06055547 (11 worldwide citation)

Method and apparatus for managing the allocation and release of memory space within a number of files shared by a number of hosts in a data processing system. A number of allocate and release tables are provided which are accessible by the number of hosts for managing the allocation and release of s ...


10
Michael J Heideman, Dennis R Konrad, David A Novak, Carl R Crandall: Clustered computer system utilizing separate servers for redundancy in which the host computers are unaware of the usage of separate servers. Unisys Corporation, Charles A Johnson, Mark T Starr, Nawrocki Rooney & Sivertson P A, December 26, 2006: US07155638 (8 worldwide citation)

An apparatus for and method of enhancing reliability within a cluster lock processing system having a relatively large number of commodity cluster instruction processors which are managed by a cluster lock manager. Because the commodity processors have virtually no system viability features such as ...