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:
Mar. 03, 2009
Filed:
May. 30, 2006
Akihiko Sakaguchi, Kokubunji, JP;
Akihiko Sakaguchi, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
When communications among a plurality of processors employed in a network storage system are required, any of the processors initiating a communication on the transmission side issues a request to an I/O processing apparatus, which is used for controlling a disk unit and a disk cache common to the processors, in order to allocate an area in the common disk cache as a communication buffer. At such a request, the I/O processing apparatus allocates a specific area in the common disk cache as a communication buffer and gives a notice of the allocation to the requesting processors on the transmission side. Receiving the notice, the transmission-side processors write data to be transferred into the specific area of the disk cache and, then, the reception-side processors fetch the transferred data from the specific area.