G - Physics – 06 – F
Patent
G - Physics
06
F
340/82
G06F 15/16 (2006.01) G06F 11/14 (2006.01) G06F 11/20 (2006.01) G06F 13/12 (2006.01) G06F 13/40 (2006.01) G06F 15/177 (2006.01)
Patent
CA 1116260
A METHOD AND MEANS FOR PATH INDEPENDENT DEVICE RESERVATION AND RECONNECTION IN A MULTI-CPU AND SHARED DEVICE ACCESS SYSTEM The Abstract A method and means for path independent reserva- tion and reconnection of devices to CPU's operating in a multi-CPU and shared device access system environ- ment. The multi-CPU and shared device access system comprises a plurality of sets of fan out paths (chan- nels), each set coupling a corresponding CPU as a source node; a plurality of input/output devices; and a plurality of control nodes (control units), each node including means for accessing the devices, for selectively intercepting the paths in order to com- plete a signal path connection to a single destination device. Each control node further includes means (FIG. 2, element 25') for storing a table of indepen- dent path sets of CPU's and reserved devices and means (FIGS. 2-5) for managing the connection of CPU's to devices such that for any given selection, reservation or reconnection indication, the table is accessed by at least one control node for ascertaining whether the CPU is a member of a set of interfaces to which the device is reserved, if so, an available path is selected. The control nodes thus allocate dynamically dissimilar path sets to devices and CPU's on an allegiance basis in order to increase the signal path connection probability by the devices to counterpart CPU's involved in the reservation, release, or recon- nection of the device and the CPU. SA9-77-043
324199
Luiz Fernando A.
Snyder Harlan C.
Sorg John H. Jr.
International Business Machines Corporation
Na
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