Using a data storage system for cluster I/O failure determination
US8095828B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2009 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Feb 4, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1456
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Techniques are disclosed relating to storing a log of write operations made to a first storage device by one of a plurality of host computers running an instance of a distributed application. The log of write operations is stored at a second storage device. The plurality of host computers communicate status information to the second storage device over respective communication paths. Upon a failure to communicate status information between one of the host computers and the second storage device, the second storage device reads from a predetermined location in the first storage device to determine whether the host computer is still performing write operations. If the second storage device reads an expected signature value written by the host computer, the host computer is deemed to have written data, which indicates that the host computer is operational but that the write operations have not been recorded by the second storage device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.