Method and apparatus for exchanging a program over a network computer system that permits reactivation of the original program if an error occurs
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United States of America Patent
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Dec 22, 1998
Grant Date -
N/A
app pub date -
Aug 23, 1995
filing date -
Aug 24, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for a program-package change in a multicomputer system (MRS) and a computer (PR1) for the multicomputer system (MRS) are disclosed. During the program-package change, the interruption of the processes being controlled by the multicomputer system (MRS) is to be kept as short as possible. In addition, for reasons of security, fallback on operation of the multicomputer system (MRS) with the replaced, old program package is to be possible. According to the invention, each computer (PR1, . . . , PRN, SR) of the multicomputer system (MRS) has in its main memory (RAM1) an area (PPN) in which the new program package is stored before the actual replacement procedure begins. During the program-package change, each of the computers (PR1, . . . , PRN, SR) is loaded with the new program package from its main memory (RAM1).
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