Storage apparatus and method for executing exclusive extent processing in parallel using counter values
US8719496B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 2010 |
| Grant date | May 6, 2014 |
| Priority date | — |
| Expiry date | Oct 23, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/067
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A storage apparatus includes a microprocessor package configured to access a logical volume and a local memory in the microprocessor package. An input/output (I/O) request range of one I/O request, including a start position address and an end position address of the logical volume which is a target of the one I/O request, is stored in the local memory. A counter value indicating a number of I/O requests to and from the logical volume associated with the one I/O request is acquired and stored in the local memory. If the counter value associated with the one I/O request is greater than the counter value associated with another I/O request, the I/O request ranges of the one I/O request and the other I/O request are compared. If there is no overlap between the I/O request ranges, the one I/O request is executed; otherwise, the one I/O request is placed on standby.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.