Directory oplock
US8965862B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2010 |
| Grant date | Feb 24, 2015 |
| Priority date | — |
| Expiry date | Nov 16, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/1774
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Current file systems may implement opportunistic locks on files that allow clients to locally cache file data, while promoting data consistency when multiple clients read/write the same file. Unfortunately, when a client locally caches directory content of a directory, the file system may lack a mechanism for notifying the client of changes to the directory that would render the cached directory content “stale”. Accordingly, one or more systems and/or techniques for managing a directory oplock are disclosed herein. A directory oplock may be generated based upon an oplock request comprising a first target key and a first parent key. Subsequent access requests for access to the directory or objects therein may be compared with the directory oplock to determine whether to break the directory oplock, and notify the client (e.g., directory oplock is broken if the client submitting the access request is different than the client owning the directory oplock).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.