Data processing: database and file management or data structures – File management – File systems
Reexamination Certificate
2004-04-26
2010-11-09
Wong, Don (Department: 2163)
Data processing: database and file management or data structures
File management
File systems
C707S827000, C707S828000, C709S203000, C709S219000, C709S221000
Reexamination Certificate
active
07831641
ABSTRACT:
A NAS switch provides large file support to a file server in a decentralized storage network such as a NAS (Network Attached Storage) storage network. For example, files greater than 2-GB can be stored on a 32-bit commodity file server. The NAS switch sits in the data path of a client on the front end and a commodity NAS file server on the back end. A segmentation module in the NAS switch stores large files as separate data chunks in the file server. To do so, the segmentation module stores a directory file handle, which points to a directory containing the data chunks, in place of the large file. The segmentation module can also store a large file/chunk directory association in a migration cache. A reconstruction module processes client requests concerning large files by issuing requests to specific data chunks. For example, in a read operation, the reconstruction module calculates chunk numbers to determine which file to read and offsets to determine which byte to read within a chunk.
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International Prelimin
Chawla Rajeev
Iyengar Anand
Tsirigotis Panagiotis
Wong Thomas K.
Dang Thanh-Ha
Neopath Networks, Inc.
Weaver Austin Villeneuve and Sampson LLP
Wong Don
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