Data integrity monitoring among sysplexes with a shared direct access storage device (DASD)
US9298381B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2014 |
| Grant date | Mar 29, 2016 |
| Priority date | — |
| Expiry date | Oct 11, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/88
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
System and method embodiments for monitoring data integrity among multiple sysplexes that share data sets on a DASD are provided. The virtual volume record (VVR) for each data set on DASD is configured with additional access fields that provide such information as the access mode (serial or multi-access), whether multiple systems have opened the data set, the names of an original sysplex and any additional sysplexes to open the data set, the names of the opening systems in each sysplex, job name and time stamp and a usage counter for each sysplex. Additional access logic in the OS on each system defines specific actions to be taken by the system OS when executing an “open” or “close” including reading and updating information in the additional access fields and generating error, warning or information messages to diagnostic logs. This allows serialization to be enforced among the sysplexes and for error messages to be issued for any system outside the original sysplex that tries to open the data set. This also enables allowing multiple sysplexes to have a data set open at the same time and to issue messages to that effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.