Providing transparent failover in a file system
US8631277B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2010 |
| Grant date | Jan 14, 2014 |
| Priority date | — |
| Expiry date | Sep 20, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2038
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A connection state system is described herein that allows a client to resume a connection with a server or a different replacement server by remotely storing client state information in association with a resume key. The system provides a resume key filter operating at the server that facilitates the storing of volatile server state information. The state information can include information such as oplocks, leases granted to a client, and in-flight operations on a file handle. The resume key filter driver sits above the file system, which allows multiple file access protocols to use the filter. Upon a failover event, such as a server going down or losing connectivity to a client, the system can bring up another server or the same server and reestablish state for file handles held by various clients using the resume key filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.