Patents by Inventor Kiyoko Sato
Kiyoko Sato has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7779084Abstract: Process migration method includes copying first process context indicative of first processing, transmitting process context to second computer, causing first computer to start generation of first execution record, causing second computer to receive process context, determining, from first execution record, whether first processing should be migrated, if it is determined that first processing should postpone being migrated, finishing generation of first execution record, starting generation of second execution record, transmitting first execution record to second computer, reproducing process context, and determining, from second execution record, whether first processing should be migrated, after reproducing of process context is finished in the second computer.Type: GrantFiled: November 20, 2007Date of Patent: August 17, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Seiji Maeda, Kiyoko Sato, Nobuo Sakiyama, Hirokuni Yano, Takuya Hayashi
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Publication number: 20080077706Abstract: Process migration method includes copying first process context indicative of first processing, transmitting process context to second computer, causing first computer to start generation of first execution record, causing second computer to receive process context, determining, from first execution record, whether first processing should be migrated, if it is determined that first processing should postpone being migrated, finishing generation of first execution record, starting generation of second execution record, transmitting first execution record to second computer, reproducing process context, and determining, from second execution record, whether first processing should be migrated, after reproducing of process context is finished in the second computer.Type: ApplicationFiled: November 20, 2007Publication date: March 27, 2008Inventors: Seiji Maeda, Kiyoko Sato, Nobuo Sakiyama, Hirokuni Yano, Takuya Hayashi
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Patent number: 7313599Abstract: Process migration method includes copying first process context indicative of first processing, transmitting process context to second computer, causing first computer to start generation of first execution record, causing second computer to receive process context, determining, from first execution record, whether first processing should be migrated, if it is determined that first processing should postpone being migrated, finishing generation of first execution record, starting generation of second execution record, transmitting first execution record to second computer, reproducing process context, and determining, from second execution record, whether first processing should be migrated, after reproducing of process context is finished in the second computer.Type: GrantFiled: August 14, 2003Date of Patent: December 25, 2007Assignee: Kabushiki Kaisha ToshibaInventors: Seiji Maeda, Kiyoko Sato, Nobuo Sakiyama, Hirokuni Yano, Takuya Hayashi
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Patent number: 7152184Abstract: A storage device for which restoration of data is possible without the need for excess equipment includes mirrored storage units for online use and for backup, and is capable of performing a data backup while continuing input and output of data. The storage device is further provided with an update data storage unit for storing update data. According to the storage device, even if the information stored in a storage unit for online use is not capable of being read because of a fault in the storage unit, it is possible to restore the data in the backup storage unit to the state that existed in the storage unit for online use immediately before the fault by applying the update data to the information stored in the storage device for backup.Type: GrantFiled: February 1, 2005Date of Patent: December 19, 2006Assignee: Kabushiki Kaisha ToshibaInventors: Seiji Maeda, Hirokuni Yano, Toshio Shirakihara, Kiyoko Sato, Nobuo Sakiyama, Takuya Hayashi
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Publication number: 20050132157Abstract: A storage device for which restoration of data is possible without the need for excess equipment includes mirrored storage units for online use and for backup, and is capable of performing a data backup while continuing input and output of data. The storage device is further provided with an update data storage unit for storing update data. According to the storage device, even if the information stored in a storage unit for online use is not capable of being read because of a fault in the storage unit, it is possible to restore the data in the backup storage unit to the state that existed in the storage unit for online use immediately before the fault by applying the update data to the information stored in the storage device for backup.Type: ApplicationFiled: February 1, 2005Publication date: June 16, 2005Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Seiji Maeda, Hirokuni Yano, Toshio Shirakihara, Kiyoko Sato, Nobuo Sakiyama, Takuya Hayashi
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Patent number: 6883112Abstract: A storage device for which restoration of data is possible without the need for excess equipment includes mirrored storage units for online use and for backup, and is capable of performing a data backup while continuing input and output of data. The storage device is further provided with an update data storage unit for storing update data. According to the storage device, even if the information stored in a storage unit for online use is not capable of being read because of a fault in the storage unit, it is possible to restore the data in the backup storage unit to the state that existed in the storage unit for online use immediately before the fault by applying the update data to the information stored in the storage device for backup.Type: GrantFiled: November 22, 2002Date of Patent: April 19, 2005Assignee: Kabushiki Kaisha ToshibaInventors: Seiji Maeda, Hirokuni Yano, Toshio Shirakihara, Kiyoko Sato, Nobuo Sakiyama, Takuya Hayashi
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Publication number: 20040111511Abstract: Process migration method includes copying first process context indicative of first processing, transmitting process context to second computer, causing first computer to start generation of first execution record, causing second computer to receive process context, determining, from first execution record, whether first processing should be migrated, if it is determined that first processing should postpone being migrated, finishing generation of first execution record, starting generation of second execution record, transmitting first execution record to second computer, reproducing process context, and determining, from second execution record, whether first processing should be migrated, after reproducing of process context is finished in the second computer.Type: ApplicationFiled: August 14, 2003Publication date: June 10, 2004Inventors: Seiji Maeda, Kiyoko Sato, Nobuo Sakiyama, Hirokuni Yano, Takuya Hayashi
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Publication number: 20030097533Abstract: A storage device for which restoration of data is possible without the need for excess equipment includes mirrored storage units for online use and for backup, and is capable of performing a data backup while continuing input and output of data. The storage device is further provided with an update data storage unit for storing update data. According to the storage device, even if the information stored in a storage unit for online use is not capable of being read because of a fault in the storage unit, it is possible to restore the data in the backup storage unit to the state that existed in the storage unit for online use immediately before the fault by applying the update data to the information stored in the storage device for backup.Type: ApplicationFiled: November 22, 2002Publication date: May 22, 2003Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Seiji Maeda, Hirokuni Yano, Toshio Shirakihara, Kiyoko Sato, Nobuo Sakiyama, Takuya Hayashi
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Patent number: 6434710Abstract: A commit controlling scheme for a transaction processing in a system utilizing the check point/roll back scheme, which is capable of guaranteeing the reliability of data of the transaction processing even when the transaction processing and the check point/roll back scheme are employed simultaneously, is described. An issuance of an external output for notifying to a user that a transaction has been committed is delayed until after a new check point for the transaction processing process is generated by the fault recovery mechanism at a timing later than a commit of the transaction by the transaction processing process. This can be realized by delaying an issuance of a transaction commit notice from the transaction processing process, or by intercepting a transaction commit notice sent from the transaction processing process, or else by delaying an issuance of the external output by the client process after receiving a transaction commit notice from the transaction processing process.Type: GrantFiled: June 22, 1999Date of Patent: August 13, 2002Assignee: Kabushiki Kaisha ToshibaInventors: Kiyoko Sato, Toshio Shirakihara, Tatsunori Kanai, Hideaki Hirayama
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Publication number: 20020032781Abstract: An intermediary server apparatus relays an information readout request from a terminal to an origin server, and returns information provided by the origin server to the terminal. The intermediary server apparatus previously assigns a first user ID to a user to discriminate each user. The origin server assigns a second user ID to the user to identify the information readout request. In the intermediary server apparatus, a memory correspondingly stores the first user ID and the second user ID. A communication unit retrieves the second user ID corresponding to the first user ID from said memory in case of receiving the information readout request including the first user ID from the terminal, and sends the information readout request including the second user ID to the origin server.Type: ApplicationFiled: September 6, 2001Publication date: March 14, 2002Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Hideki Yoshida, Tetsuro Muranaga, Go Fujino, Seiji Maeda, Yasuhiro Kimura, Kiyoko Sato, Hirokuni Yano, Junichi Segawa
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Patent number: 6185702Abstract: A process state management scheme capable of acquiring process states consistently even in a case where a new process is generated from some process, while using the synchronous checkpointing method. This scheme prohibits a new process generation during a process state acquisition, which can be realized by judging whether a process generation request by a first process for generating a second process is prior to a process state acquisition request or not, and generating the second process from the first process accordingly. This scheme also prohibits a process state acquisition during a new process generation, which can be realized by acquiring a process state at each of the first and second processes after a notice of the identifier of the second process from the first process is received, when a notice of the identifier of the second process from the second process is prior to the notice from the first process.Type: GrantFiled: January 23, 1998Date of Patent: February 6, 2001Assignee: Kabushiki Kaisha ToshibaInventors: Toshio Shirakihara, Hideaki Hirayama, Kiyoko Sato, Tatsunori Kanai
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Patent number: 6026499Abstract: A scheme for restarting processes at distributed checkpoints in a client-server computer system, in which a fault in one client computer does not affect the server computer and the other client computers. In this scheme, a fault occurring in one computer among of a plurality of computers constituting a client-server computer system is detected while these plurality of computers are executing respective processes, and whether that one computer in which the fault is detected is a server computer or not is judged. Then, related processes executed on these plurality of computers are restarted when that one computer is judged as the server computer, whereas no process executed on these plurality of computers is restarted when that one computer is not judged as the server computer.Type: GrantFiled: January 30, 1998Date of Patent: February 15, 2000Assignee: Kabushiki Kaisha ToshibaInventors: Toshio Shirakihara, Hideaki Hirayama, Kiyoko Sato, Tatsunori Kanai