Storage system and a file layer management method

Details Storage system and a file layer management method Storage system and a file layer management method

2009-06-26

2011-10-11

Mofiz, Apu (Department: 2161)

Data processing: database and file management or data structures

Database design

Database and data structure management

Reexamination Certificate

active

08037111

ABSTRACT:
A file server holding tag information representative of file contents and an access frequency of each file calculates a tag rating from the access frequency of each file and calculates a file rating from the tag rating affixed to the file. It controls to place a file having a high calculated file rating on a higher transfer performance layer, and place a file having a low calculated file rating on a lower transfer performance layer. Rapid accesses can be handled quickly by placing in advance a file whose access is anticipated to be increased after interest is increased although an access frequency is still low, on a layer having a short response time and high throughput, and by maintaining a file whose access is anticipated to be increased because of increased interest although an access frequency is lowered, on a layer having a short response time and high throughput.

REFERENCES:
patent: 7355806 (2008-04-01), Hakamata et al.
patent: 2000-293314 (2000-10-01), None

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