International Business Machines Corporation

John R Eells

Mark A Nelson

David B Petersen

Embodiments are directed to a computer-implemented method for determining whether a program has been modified. The method can include determining that a first instance of the program is loaded in main memory. The method can further include determining a starting memory location of the first instance of the program. A second instance of the program is loaded into main memory. The second instance of the program is loaded such that memory references in the second instance of the program are resolved as if the second instance were loaded at the starting memory location of the first instance of the program. The first instance of the program is compared with the second instance of the program.

Determining whether two programs are identical

Embodiments include method, systems and computer program products for operating a resettable write once read many (RWORM) memory. The method includes receiving, by a processor, a request for at least a portion of memory in a computer system to be designated as RWORM memory. The processor further writes data to the RWORM memory. The processor further maintains the RWORM memory in a read-only state after the RWORM memory is written to. The processor further re-designates the RWORM memory to a read/write state in response to encountering a system reset.

Resettable write once read many memory

A computer program product is provided for data currency improvement in a system having data sites running first and second applications within a common operating system hosted on a real or virtualized server and includes a computer readable storage medium having sequences of program instructions. The sequences of program instructions are readable and executable by a processing circuit to cause the processing circuit to establish first and second sites as active standby and active query sites, respectively, direct first and second transactions of the first application to the first site and to at least the second site, respectively, monitor replication delays from times at which data updates occur at the first site to times at which the data updates are replicated at least at the second site and set a delay for responding to the second transactions of the first application in accordance with the monitoring independent of a setting of any delay for responding to second application requests.

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Pleasant Valley, NY, United States of America

John R Eells