Storage virtualization apparatus causing access request process to be delayed based on incomplete count and storage virtualization method
US9367492B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 21, 2013 |
| Grant date | Jun 14, 2016 |
| Priority date | — |
| Expiry date | Jan 25, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/1097
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A storage virtualization apparatus includes: a first storing unit to store, with respect to each storage port, a process incomplete command count defined as number of commands not yet processed by the storage device having each storage port; a control unit to obtain process incomplete command counts accumulated by other storage virtualization apparatuses, and stores into a second storing unit a process incomplete command total count that is a total of the process incomplete command counts obtained from the other storage virtualization apparatuses and the first storing unit; and an access request responding unit to, when receiving an access request, obtain the process incomplete command total count about a storage port corresponding to the received access request, and to, when the obtained process incomplete command total count is larger than a prescribed number, cause completion timing of an access responding process to the access request to be delayed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.