Hitachi Solutions Assigned Two Patents

Delta indexing method for hierarchy file storage
Hitachi Solutions, Ltd., Tokyo, Japan, has been assigned a patent (9,081,784) developed by Ishii, Yohsuke, Yokohama, Japan, for a “delta indexing method for hierarchy file storage.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A device relative to a delta indexing method for a hierarchy file storage including a from-end side file server and a back-end side file server is provided. The front-end side file server creates a file update list for accumulating a file update history in a file system therein, a search server requests the file update list to the front-end side file server, and the front-end side file server supplies path name information of a targeted file in the back-end side file server in addition to the file update list, thereby, the search accesses tot the back-end side file server to be able to acquire necessary information for a search index update.“

The patent application was filed on July 12, 2012 (13/547,731).

Information management method, and computer for providing information
Hitachi Solutions, Ltd., Tokyo, Japan, has been assigned a patent (9,015,131) developed by Kirihata, Yasuhiro, and Nakayama, Kouji, Tokyo, Japan, for a “information management method, and computer for providing information.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”When an online storage service is used to expand a storage capacity of a file server, an amount of communication in synchronization processing and an amount of data retained on the online storage service are reduced to save an amount of charge. In a kernel module provided with a storage area on the online storage service, files are divided into block files and managed, and blocks overlapping with an already registered and saved block file group are not uploaded, but only configuration information of the files is changed. A mechanism is adopted, in which DBs for managing meta information and elimination of duplication are divided and managed, and only updated sections are appropriately uploaded.“

The patent application was filed on August 26, 2011 (13/636,058).