Title:
PROVIDING TRANSPARENT FAILOVER IN A FILE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2012/078693
Kind Code:
A3
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.
Inventors:
SWAN PAUL R (US)
GEORGE MATHEW (US)
KRUSE DAVID M (US)
BATTEPATI ROOPESH C (US)
JOHNSON MICHAEL C (US)
GEORGE MATHEW (US)
KRUSE DAVID M (US)
BATTEPATI ROOPESH C (US)
JOHNSON MICHAEL C (US)
Application Number:
PCT/US2011/063618
Publication Date:
August 16, 2012
Filing Date:
December 06, 2011
Export Citation:
Assignee:
MICROSOFT CORP (US)
International Classes:
H04L12/24; G06F15/16; H04L29/06
Foreign References:
| US20050091212A1 | 2005-04-28 | |||
| US20050223014A1 | 2005-10-06 | |||
| US20090319661A1 | 2009-12-24 | |||
| US7664991B1 | 2010-02-16 |
Other References:
See also references of EP 2649750A4
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