Facilitating failover to a secondary file server in a highly...

Details Facilitating failover to a secondary file server in a highly... Facilitating failover to a secondary file server in a highly...

2005-04-19

2005-04-19

Ali, Mohammed (Department: 2167)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000

Reexamination Certificate

active

06883010

ABSTRACT:
One embodiment of the present invention provides a system for elevating a secondary file server to act as a new primary file server in a highly available file system. Upon determining that a primary file server in the highly available file system has failed, the system promotes the secondary file server to become the new primary file server. During this process, the new primary file server scans file objects to look for a file lock indication. Upon finding a file lock indication, the new primary file server converts an associated file identifier into a virtual node. Otherwise, conversion of file identifiers into virtual nodes is delayed until the first time a file is subsequently accessed by the new primary server, thereby speeding up the failover process.

REFERENCES:
patent: 5893086 (1999-04-01), Schmuck et al.
patent: 6085238 (2000-07-01), Yuasa et al.
patent: 6601070 (2003-07-01), Zhang et al.

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