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:
Jun. 13, 2006
Filed:
Feb. 20, 2004
Damien Le Moal, Tokyo, JP;
Hiroshi Mine, Tokyo, JP;
Damien Le Moal, Tokyo, JP;
Hiroshi Mine, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
When streaming data is sent to a client, server capabilities are restricted by the ability to retrieve data from a storage unit, the data transfer rate drops and processing time increases. A device adapter that connects a host and a storage includes a cache controller, a cache interface that accesses a cache device and a storage interface that accesses the storage. With the cache controller, data retrieved from the storage can be stored in a cache without the awareness of a host computer. The cache controller includes a cache directory that manages storage region allocation of the cache and a monitor that maintains load and performance information of the storage and the cache. The storage and the cache are appropriately used not only depending on the presence of requested data inside the cache but also depending on the present load and performance of the storage.