Efficiency of file synchronization in a linear tape file system
A mechanism is provided for improved file synchronization of a magnetic tape. A destination device determines whether one or more file checksums exist in an extended file attribute associated with an identified file. Responsive to one or more file checksums existing in the extended file attribute associated with the identified file, the destination device reads the one or more file checksums out of the extended file attribute without accessing the magnetic tape. The destination device transmits the one or more file checksums to a source device. The source device segments the data of the new file into fixed-length blocks that do not overlap one another. The source device calculates one or more new file checksums for each of the fixed-length blocks. The source device transmits the one or more new file checksums to the destination device.
International Business Machines Corporation
G G G
G06F G06F G06F
inventional inventional inventional
Takashi Tohru Terue Hiroshi Shinsuke
Ashida Hasegawa Watanabe Itagaki Mitsuma