Access serialization method for the input-output method and apparatus and re-configuration management system I / O device

摘要

An installation creates a source I/O definition file (IODF), defining a current system I/O configuration, and a target IODF, defining a future I/O configuration. When the configuration definition is dynamically changed from the current to the target, a serialization mechanism - comprising a "device pin" technique and a "group serialization" technique to handle changed device group definitions - insures that data integrity is not lost on devices undergoing reconfiguration; and a change detection mechanism insures that changes to control structures affected by the dynamic reconfiguration, are noticed by programs accessing those control structures while the structures are changing. IMAGE