Computer program product, method, apparatus and data storage system for controlling write operations in the data storage system
US10198193B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2014 |
| Grant date | Feb 5, 2019 |
| Priority date | — |
| Expiry date | Jul 6, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/01
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The data storage system includes one or more storage apparatuses and a file system server connected to the one or more storage apparatuses and to one or more host computers. Write operations are controlled by providing a free space object which stores a plurality of indicators, each indicator being associated with one of a plurality of storage units for storing data units in the one or more storage apparatuses and each indicator indicating whether the associated storage unit is free or used, executing a read-ahead examination which comprises examining a set of indicators of the free space object for identifying one or more used storage units associated with indicators of the set, in particular for observing a fragmentation status of the storage units associated with the indicators of the set, and executing an allocation examination which comprises examining one or more indicators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.