Processing of data to suspend operations in an input/output processing log-out system
US7840718B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2008 |
| Grant date | Nov 23, 2010 |
| Priority date | — |
| Expiry date | Nov 9, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/124
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A computer program product, an apparatus, and a method for processing communications between a control unit and a channel subsystem in an input/output processing system are provided. The computer program product includes a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method. The method includes: sending a Process Log-out (PRLO) message from the control unit to the channel subsystem, the message requesting suspension of input/output operations between the control unit and the channel subsystem for a period of time, the period of time being defined by the PRLO message; responsive to the PRLO message, suspending by the channel all input/output operation messages for the period of time, wherein suspending comprises stopping input/output operation messages during the period of time; and responsive to an expiration of the period of time, sending a Process Log-in (PRLI) message from the channel subsystem to the control unit to re-initiate an operating environment between the channel subsystem and the control unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.