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. 23, 2010
Filed:
Jul. 31, 2006
Shinjiro Shiraki, Ninomiya, JP;
Koji Iwamitsu, Odawara, JP;
Hidekazu Aoyama, Odawara, JP;
Bunitsu Ando, Hiratsuka, JP;
Shinjiro Shiraki, Ninomiya, JP;
Koji Iwamitsu, Odawara, JP;
Hidekazu Aoyama, Odawara, JP;
Bunitsu Ando, Hiratsuka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A storage control apparatus of the present invention controls the number of multiple commands issued from a host machine without shutting down the host machine. A communication port of the storage control apparatus carries out communications with the hosts in accordance with the iSCSI protocol. Command processing resources are managed for each communication port. A resource allocation control part calculates the number of commands capable of being received on the basis of the remaining amount of command processing resources inside shared port resources, a change in the number of commands received from a host, communication delay time, and the state of execution of a command issued from a host or the like. A MaxCmdSN is calculated by adding the results of command processing by a command execution part and the receivable number calculated by the resource allocation control part to the value of the latest CmdSN received from a host. The storage control apparatus adds the MaxCmdSN to a transmission frame and transmits it to the host.