Patents by Inventor Toshihiro Ozawa
Toshihiro Ozawa 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: 8909984Abstract: A storage management apparatus manages a plurality of storage apparatuses in a storage system that disperses and stores data that is made redundant so as to have a predetermined redundancy level. The storage management apparatus includes: a patrol process unit that performs, at a patrol speed, a patrol process of confirming that the plurality of storage apparatuses are being operated normally; a relocating process unit that performs, at a relocating process speed, a relocating process of moving the data between the plurality of storage apparatuses; a recovery process unit that performs, at a recovery process speed, a recovery process of recovering the redundancy level of the data when a fault occurs in the plurality of storage apparatuses; and a processing speed control unit that controls the recovery process speed or a sum of the patrol process speed and the relocating process speed to have a predetermined value.Type: GrantFiled: March 13, 2013Date of Patent: December 9, 2014Assignee: Fujitsu LimitedInventors: Tatsuo Kumano, Yasuo Noguchi, Munenori Maeda, Masahisa Tamura, Ken Iizawa, Toshihiro Ozawa, Jun Kato, Kazuichi Oe, Kazutaka Ogihara
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Publication number: 20140351366Abstract: An information processing system includes a first storage unit configured to store first divided data indicating divided time-series data, a second storage unit configured to store second divided data indicating divided time-series data divided at a time that is different from a time at which the first divided data is divided, and an processor that executes a procedure including, when a reproduction time is designated for the time-series data, reading and outputting divided data divided at a time just before the reproduction time from among the first divided data and the second divided data stored in the first storage unit and the second storage unit.Type: ApplicationFiled: May 16, 2014Publication date: November 27, 2014Applicant: FUJITSU LIMITEDInventors: Munenori MAEDA, Toshihiro Ozawa
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Patent number: 8856761Abstract: An instruction processing method includes generating a translated code block for an instruction, among instructions included in a target program to be executed and for which a number of executions through sequential interpretation is greater than or equal to a threshold, and storing the generated translated code block in a first storage unit and removing part or all of the translated code block from the first storage unit at a given timing, wherein the generating reduces the threshold with respect to the number of executions over a given period of time after the part or all of the translated code block is removed.Type: GrantFiled: March 15, 2012Date of Patent: October 7, 2014Assignee: Fujitsu LimitedInventors: Munenori Maeda, Toshihiro Ozawa, Tsuyoshi Takeuchi
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Publication number: 20140289562Abstract: A controlling method executed by a processor included in an information processing apparatus, the controlling method includes storing identifiers of information processing apparatuses and identifiers of groups, each of the information processing apparatuses belonging to at least one of the groups, a group among the groups storing replications of one or more identifiable data; and detecting, by the information processing apparatus, a failure of other information processing apparatus belonging to one or more groups among the groups to which the information processing apparatus executing the detecting of the failure belongs, based on the identifiers of information apparatuses and the identifiers of groups.Type: ApplicationFiled: March 6, 2014Publication date: September 25, 2014Applicant: FUJITSU LIMITEDInventor: Toshihiro Ozawa
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Patent number: 8843672Abstract: An access method includes: obtaining, by a computer, a result of monitoring a busy rate and a number of access operations per unit time of a storage device, the storage device having a first storage area and a second storage area; calculating a characteristic of correlation between the busy rate and the number of access operations per unit time based on the result; calculating a second number of access operations per unit time based on the characteristic of the correlation such that a sum of a first busy rate corresponding to a first number of access operations per unit time and a second busy rate corresponding to a second number of access operations per unit time becomes equal to or lower than a given busy rate; and controlling a number of operations to access the second storage area per unit time based on the second number of access operations.Type: GrantFiled: March 13, 2012Date of Patent: September 23, 2014Assignee: Fujitsu LimitedInventors: Kazuichi Oe, Kazutaka Ogihara, Yasuo Noguchi, Tatsuo Kumano, Masahisa Tamura, Yoshihiro Tsuchiya, Takashi Watanabe, Toshihiro Ozawa
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Patent number: 8832113Abstract: A data management apparatus sends specific data and key information corresponding to the specific data to another apparatus, when executing a process to change a storage destination of the specific data in which the hash value obtained by applying a predetermined hash function to corresponding key information belongs to a certain range, from the data management apparatus to the other apparatus, and sends the identification information of the other apparatus stored in correspondence with the certain range to a request source of an operation request, when the operation request with respect to data corresponding to key information is received after the process.Type: GrantFiled: August 10, 2012Date of Patent: September 9, 2014Assignee: Fujitsu LimitedInventors: Masahisa Tamura, Yasuo Noguchi, Toshihiro Ozawa, Munenori Maeda, Takashi Watanabe, Tatsuo Kumano, Ken Iizawa
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Patent number: 8825968Abstract: An information processing apparatus includes a first storage unit and a processor. The first storage unit includes a first storage area. The processor receives a first request to write first data into the first storage area. The processor requests an external apparatus to write the first data into a second storage area in a second storage unit included in the external apparatus. The processor determines whether a first response has been received from the external apparatus. The first response indicates that the first data has been written into the second storage area. The processor writes the first data into the first storage area when the first response has been received. The processor requests, without writing the first data into the first storage area, the external apparatus to write second data stored in the first storage area into the second storage area when the first response has not been received.Type: GrantFiled: July 31, 2012Date of Patent: September 2, 2014Assignee: Fujitsu LimitedInventors: Masahisa Tamura, Yasuo Noguchi, Kazutaka Ogihara, Yoshihiro Tsuchiya, Takashi Watanabe, Tatsuo Kumano, Kazuichi Oe, Toshihiro Ozawa
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Publication number: 20140146688Abstract: A first information processing apparatus transmits a message storing a replica of data stored in the first information processing apparatus. The message has an unspecified destination. A first relay apparatus detects a second information processing apparatus provided in a network to which the first relay apparatus belongs. The first relay apparatus selects, as a transfer destination of the message, the second information processing apparatus or a second relay apparatus upon receiving the message. The first relay apparatus transfers the message to the selected transfer destination. The second information processing apparatus stores the replica therein upon receiving the message.Type: ApplicationFiled: October 7, 2013Publication date: May 29, 2014Applicant: FUJITSU LIMITEDInventors: Munenori MAEDA, Jun Kato, Tatsuo Kumano, Masahisa Tamura, Ken Iizawa, Yasuo Noguchi, Toshihiro Ozawa, Kazuichi Oe, Kazutaka Ogihara
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Patent number: 8667186Abstract: The disclosed method includes obtaining a result concerning a busy rate and the number of accesses per unit time for a storage device including first and second storage areas; determining, from the result, whether an event that a first indicator value for the busy rate is reset occurs; when the event occurred, notifying a controller that makes the number of accesses for the second storage area not greater than the notified number of accesses of the first number of accesses less than the second number of accesses, which was notified immediately before; obtaining another result; updating the first indicator value based on another result; calculating the third number of accesses so that a sum of busy rates corresponding to the third number of accesses and corresponding to the designated number of accesses becomes equal to the updated first indicator value; and notifying the controller of the third number of accesses.Type: GrantFiled: September 14, 2012Date of Patent: March 4, 2014Assignee: Fujitsu LimitedInventors: Kazuichi Oe, Kazutaka Ogihara, Yasuo Noguchi, Tatsuo Kumano, Masahisa Tamura, Munenori Maeda, Ken Iizawa, Toshihiro Ozawa
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Publication number: 20140012816Abstract: An evaluation apparatus includes: a calculation unit configured to calculate the evaluation value of the evaluation target content by using an evaluation value estimation algorithm, based on a count value for the evaluation target content and a sum value of respective count values for the plurality of contents; a verification unit configured to verify whether the sum value of the respective count values for the plurality of contents reaches a predetermined value; and a processing unit configured to reduce the respective count values of the plurality of contents, when the sum value of the respective count values for the plurality of contents reaches the predetermined value, and is capable of detecting a sudden data spike at high speed in the evaluation value estimating algorithm.Type: ApplicationFiled: May 26, 2013Publication date: January 9, 2014Applicant: FUJITSU LIMITEDInventors: Jun KATO, Toshihiro OZAWA, Munenori MAEDA, Masahisa TAMURA, Tatsuo KUMANO, Ken IIZAWA
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Publication number: 20130311430Abstract: A computer includes a memory that stores a program and received data; and a processor that executes an operation by executing the program stored in the memory, the operation including storing the received data into a first database having a first data structure in which reading is performed in a random access manner and writing is performed in a sequential access manner, when the received data is received from a second apparatus is as same as data stored in a first apparatus which has a failure, and copying the received data stored in the first database to a second database having a second data structure in which reading is performed in a sequential access manner and writing is performed in a random access manner.Type: ApplicationFiled: March 26, 2013Publication date: November 21, 2013Inventors: Ken IIZAWA, Toshihiro OZAWA, Yasuo NOGUCHI, Kazuichi OE, Munenori MAEDA, Kazutaka OGIHARA, Masahisa TAMURA, Tatsuo KUMANO, Jun KATO
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Patent number: 8589644Abstract: A file server has a conversion table that stores therein, in a corresponding manner, logical addresses specified by a higher-level layer and physical addresses specified by a disk driver that are address information indicative of a storage area in a disk device. The file server accesses the disk device with a storage area indicated by a physical address as an access destination and counts up the number of access requests to each storage area in a given period of time for each of the logical addresses. The file server then updates the conversion table such that the physical addresses are lined up in a descending order of the logical addresses of a higher number of the access requests counted. Thereafter, the file server changes storage areas of data stored in the storage device based on the conversion table updated.Type: GrantFiled: August 25, 2011Date of Patent: November 19, 2013Assignee: Fujitsu LimitedInventors: Kazuichi Oe, Tatsuo Kumano, Yasuo Noguchi, Kazutaka Ogihara, Masahisa Tamura, Yoshihiro Tsuchiya, Takashi Watanabe, Toshihiro Ozawa
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Publication number: 20130262384Abstract: A replication system includes: N (?3) storage devices; and N nodes, connected to a host via a 1st network and connected to the N number of storage devices via a 2nd network, each to receive a request for accessing a storage device associated with itself and to have an access with a content in response to the received access request to the storage device, wherein when a node receives a write request of data from the host, each of M nodes (1<M<N) including the node stores the data in the storage device associated with itself, and if first data in a first storage device cannot be read out, the first data stored in another storage device is stored into a second storage device not stored with the first data by transmitting the first data via the second network.Type: ApplicationFiled: February 27, 2013Publication date: October 3, 2013Applicant: FUJITSU LIMITEDInventors: Yasuo NOGUCHI, Toshihiro OZAWA, Kazuichi OE, Munenori MAEDA, Kazutaka OGIHARA, Masahisa TAMURA, Ken IIZAWA, Tatsuo KUMANO, Jun KATO
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Publication number: 20130262924Abstract: Multiple storage apparatuses are provided, at least part of which are individually incorporated into one of storage groups. Each of multiple control apparatuses is configured to, when assigned one or more of the storage groups each including one or more of the storage apparatuses, control data storage by storing data designating each assigned storage group redundantly in the storage apparatuses of the assigned storage group. An information processing apparatus is configured to, when a storage group with data redundancy being lost is detected, make a change in control apparatus assignment for the storage groups in such a manner that a storage group different from the detected storage group is not assigned to a control apparatus with the detected storage group assigned thereto. Subsequently, the information processing apparatus causes the control apparatus to execute a process of restoring the data redundancy of the detected storage group.Type: ApplicationFiled: March 18, 2013Publication date: October 3, 2013Applicant: Fujitsu LimitedInventors: Kazutaka OGIHARA, Yasuo Noguchi, Tatsuo Kumano, Masahisa Tamura, Kazuichi Oe, Toshihiro Ozawa, Munenori Maeda, Ken Iizawa, Jun Kato
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Publication number: 20130246580Abstract: A transfer data block is selected, and a data file including the transfer data block is selected as a transfer data file. All the data blocks of the transfer data file are added to the transfer data block. When all the data files including each transfer data block is selected as a transfer data file, the transfer data block is selected as a deletion data block. When a total data amount of the deletion data block is larger than or equal to a predetermined target deletion data amount and a ratio of a total data amount of the transfer data block to the total data amount of the deletion data block is smaller than or equal to a predetermined value, the data file is transferred from a transfer source node to a transfer destination node. Accordingly, a storage can be used efficiently.Type: ApplicationFiled: December 20, 2012Publication date: September 19, 2013Inventors: Toshihiro OZAWA, Kazutaka OGIHARA, Yasuo NOGUCHI, Tatsuo KUMANO, Masahisa TAMURA, Jun KATO, Ken IIZAWA, Kazuichi OE, Munenori MAEDA
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Publication number: 20130246597Abstract: There are provided a processing unit that processes received requests, a storage unit that stores order information added to the last-processed request among the requests processed by the processing unit as final request information, a determination unit that determines whether the received request has been processed with reference to the final request information based on the order information added to the received request, and a control unit that, when the determination unit determines that the received request has been processed, prevents the received request from being processed by the processing unit, thereby preventing overlapped execution of a command.Type: ApplicationFiled: January 8, 2013Publication date: September 19, 2013Applicant: FUJITSU LIMITEDInventors: Ken Iizawa, Toshihiro Ozawa, Yasuo Noguchi, Kazuichi Oe, Munenori Maeda, Kazutaka Ogihara, Masahisa Tamura, Tatsuo Kumano, Jun Kato
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Publication number: 20130246717Abstract: An information processing system includes: CPUs; storage devices; switches; dummy storage devices which are with respective storage devices and each of which sends, when receiving an identifying information request, its own identifying information back to a sender of the identifying information request; and dummy CPUs which are associated with respective CPUs and each of which tries to, when receiving an instruction for acquiring identifying information from a dummy storage device, acquire the identifying information of the dummy storage device by transmitting the identifying information request, and sends the identifying information as response information back to a sender device of the acquiring instruction.Type: ApplicationFiled: February 14, 2013Publication date: September 19, 2013Applicant: FUJITSU LIMITEDInventors: Yasuo Noguchi, Toshihiro Ozawa, Kazuichi Oe, Munenori Maeda, Kazutaka Ogihara, Masahisa Tamura, Ken Ilzawa, Tatsuo Kumano, Jun Kato
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Publication number: 20130246479Abstract: A converting unit determines the type of data item of which data defined in a hierarchical data model is composed. When it is determined that the type of the data item is an array, the converting unit adds information obtained by binding array information, indicating an array, with order information, indicating the order of an array, to an item name of data that is defined in a non-hierarchical data model by using the item name and a value. When it is determined that the type of the data item is an object, the converting unit adds information obtained by binding object information, indicating an object, with an element to an item name. When it is determined that the type of the data item is a value, the converting unit creates data in the non-hierarchical data model by associating the value with the item name.Type: ApplicationFiled: January 28, 2013Publication date: September 19, 2013Applicant: Fujitsu LimitedInventors: Tatsuo Kumano, Yasuo Noguchi, Munenori Maeda, Masahisa Tamura, Ken Iizawa, Toshihiro Ozawa, Jun Kato
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Publication number: 20130246840Abstract: A storage management apparatus manages a plurality of storage apparatuses in a storage system that disperses and stores data that is made redundant so as to have a predetermined redundancy level. The storage management apparatus includes: a patrol process unit that performs, at a patrol speed, a patrol process of confirming that the plurality of storage apparatuses are being operated normally; a relocating process unit that performs, at a relocating process speed, a relocating process of moving the data between the plurality of storage apparatuses; a recovery process unit that performs, at a recovery process speed, a recovery process of recovering the redundancy level of the data when a fault occurs in the plurality of storage apparatuses; and a processing speed control unit that controls the recovery process speed or a sum of the patrol process speed and the relocating process speed to have a predetermined value.Type: ApplicationFiled: March 13, 2013Publication date: September 19, 2013Applicant: Fujitsu LimitedInventors: Tatsuo KUMANO, Yasuo NOGUCHI, Munenori MAEDA, Masahisa TAMURA, Ken IIZAWA, Toshihiro OZAWA, Jun KATO, Kazuichi OE, Kazutaka OGIHARA
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Publication number: 20130138893Abstract: A storage device being one of a plurality of storage devices storing data includes a memory and a processor coupled to the memory. The processor executes determining, when having received a new request and a new priority information during a preparation for an execution of another update processing, whether a new priority indicated by the new priority information is higher than a priority of the update processing in the preparation. The process including canceling the update processing in the preparation when having determines at the determining that the new priority is higher than the priority of the update processing in the preparation. The process includes forwarding the new request and the new priority information to another storage device when having determined at the determining that the new priority is higher than the priority of the update processing in the preparation.Type: ApplicationFiled: September 14, 2012Publication date: May 30, 2013Applicant: Fujitsu LimitedInventors: Munenori MAEDA, Jun Kato, Tatsuo Kumano, Masahisa Tamura, Ken Ilzawa, Yasuo Noguchi, Toshihiro Ozawa