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. 23, 2012
Filed:
Sep. 18, 2009
Lin Wujuan, Senggang East Way, SG;
Shoji Kodama, St Thomas Walk, SG;
Lin Wujuan, Senggang East Way, SG;
Shoji Kodama, St Thomas Walk, SG;
Hitachi, Ltd., Tokyo, JP;
Abstract
A DHT-based global namespace (GNS) is constructed for a network system that includes network attached storage (NAS) devices, including at least one DHT-NAS device (a NAS device having DHT Functionalities) and at least one Existing-NAS device (a NAS device lacking DHT Functionalities). In a DHT Overlay Construction Phase, the DHT-NAS devices construct a DHT overlay. In an Initial Phase, the GNS is created above share folders in the Existing-NAS devices, with mapping of the share folders in the Existing-NAS devices to GNS paths distributed to a key lookup table in the DHT-NAS devices. Each mapping in the key lookup table includes a key, a GNS path, NAS type, IP address of the NAS, and the path within the NAS Share. There is no central GNS mapping table. In a Discovery Phase, the DHT-NAS devices discover the Existing-NAS devices to construct the GNS under the share folders. In a Working Phase, the DHT-NAS devices service GNS requests.