Data access management system in distributed processing system
US7228352B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2000 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Nov 16, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/1458
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data access management system in a distributed processing system capable of immediately restoring the system as a whole, has computers connected to each other via LAN, and a secondary storage device to which the computers are connected via data transfer paths. An access control subsystem for executing a data access to the secondary storage device is executed on each of the computers. A file management subsystem for giving an authority for writing the data to each access control subsystem, is executed on specified computer. When the file management subsystem transmits, to a certain access control subsystem, access control information indicating the authority for writing the data to a specified block on the secondary storage device, the same access control information is saved in the transmitted-side access control subsystem, and its record is retained in the file management subsystem. If the file management subsystem falls into a process-down, a standby file management subsystem is determined to become a new file management subsystem. Then this standby file management subsystem requests each of the access control subsystems to notify of the access control information saved by each…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.