The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 11, 2011
Filed:
Jun. 26, 2009
Shunya Tabata, Tokyo, JP;
Nobuo Beniyama, Yokohama, JP;
Hiroshi Nojima, Fujisawa, JP;
Hitachi, Ltd., Tokyo, JP;
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.