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:
Nov. 13, 2012
Filed:
Sep. 29, 2009
Takashi Ochi, Odawara, JP;
Takahiko Takeda, Minamiashigara, JP;
Yasuhiko Yamaguchi, Hiratsuka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The correspondence of the respective ports and the respective microprocessors is dynamically changed based on the load of the respective microprocessors. When an open port MP including a plurality of ports connected to a host computer receives an I/O request from the host computer via a port, it specifies an MPPK to become the transfer destination of the I/O request, and transfers the I/O request to the specified MPPK. Each MP belonging to the MPPK that received the I/O request selects either an exclusive mode where a single MP exclusively performs the processing of the I/O request, or a share mode where two or more MPs share the processing of the I/O request. Each MP selects the exclusive mode or the share mode corresponding to when load information concerning the ports shows a low load or high load condition, respectively, and executes the I/O processing accordingly.