System and method for supporting change notify watches for...

Details System and method for supporting change notify watches for... System and method for supporting change notify watches for...

2007-11-30

2010-10-05

LeRoux, Etienne P (Department: 2161)

Data processing: database and file management or data structures

File management

File systems

Reexamination Certificate

active

07809776

ABSTRACT:
A technique supports Change Notify watches in virtualized storage systems. In particular, techniques of the present invention advantageously emulate Change Notify features (e.g., as documented by the CIFS protocol) on virtualized storage systems by leveraging virtualization mapping information (e.g., an inode-to-path or “I2P” mapping) to walk a file system tree backwards from the data blocks to their ancestors to determine whether there are applicable watches on ancestor directories, and to obtain a pathname (e.g., relative) of the watched (changed) data. In particular, changes to data received from different protocols (e.g., CIFS, NFS, HTTP, etc.) can trigger watches to clients on the virtualized storage system. Also, performance may be enhanced using various caching techniques, and watch state may be retained while moving watched data across volumes of the virtualized storage system.

REFERENCES:
patent: 5819292 (1998-10-01), Hitz et al.
patent: 5944789 (1999-08-01), Tzelnic et al.
patent: 6671773 (2003-12-01), Kazar et al.
patent: 2002/0116593 (2002-08-01), Kazar et al.
patent: 2003/0065796 (2003-04-01), Borr
patent: 2005/0246401 (2005-11-01), Edwards et al.
patent: 2006/0218135 (2006-09-01), Bisson et al.
patent: 2006/0288026 (2006-12-01), Zayas et al.
patent: 2008/0243967 (2008-10-01), Bhatia et al.
U.S. Appl. No. 11/264,831, entitled System and Method for Managing Hard Lock State Information in a Distributed Storage System Environment, filed Nov. 1, 2005, 54 pages.

Affiliated with

Also associated with

Rating

System and method for supporting change notify watches for... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System and method for supporting change notify watches for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for supporting change notify watches for... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4222219