Interdicting I/O and messaging operations from sending central p

Details Interdicting I/O and messaging operations from sending central p Interdicting I/O and messaging operations from sending central p

1992-03-30

1995-02-28

Bowler, Alyssa H.

Boots, shoes, and leggings

395575, 395275, 3642384, 3642601, 3642842, 3642843, 364DIG1, G06F 1300

Patent

active

053945549

ABSTRACT:
In a multi-system complex having central processing complexes (CPCs) and subsystems, a hardware facility for prompt interdicting I/O and message operations. A CPC or subsystem failure causes as interruption in the availability of the data bases to the attached network of terminals. Often such networks have thousands of terminals. Even a short loss of data is detrimental. Therefore the CPC or subsystem takeover must be accomplished as quickly as possible and the I/O attached to the failing CPC or subsystem must be interdicting to release it for use to the rest of the complex. The disclosed hardware facility provides a mechanism which is program initiated and controlled and which guarantees the prompt completion of the interdiction function.

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