Patents by Inventor Yutaka Enko
Yutaka Enko 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: 8700573Abstract: The present invention relates to a migration of a file from a path denotative NAS server to an ID denotative NAS server. In a file management device a migration-use path denotative NAS access section obtains a file deposit location from the path denotative NAS server, selects a migration target file based on the deposit location, and sends a read request with the deposit location of the migration target file to the path denotative NAS server, so as to obtain the migration target file. A migration-use denotative NAS access section generates a write request with the migration target file, sends it to the ID denotative NAS servers, and writes the file therein. In addition, the migration-use ID denotative NAS access section registers a GUID received from the ID denotative NAS servers in a file name/GUID management table, together with the file name of the migration target file.Type: GrantFiled: May 21, 2012Date of Patent: April 15, 2014Assignee: Hitachi, Ltd.Inventors: Yutaka Enko, Masaaki Iwasaki, Yoji Nakatani
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Publication number: 20120290641Abstract: The present invention relates to a migration of a file from a path denotative NAS server to an ID denotative NAS server. In a file management device a migration-use path denotative NAS access section obtains a file deposit location from the path denotative NAS server, selects a migration target file based on the deposit location, and sends a read request with the deposit location of the migration target file to the path denotative NAS server, so as to obtain the migration target file. A migration-use denotative NAS access section generates a write request with the migration target file, sends it to the ID denotative NAS servers, and writes the file therein. In addition, the migration-use ID denotative NAS access section registers a GUID received from the ID denotative NAS servers in a file name/GUID management table, together with the file name of the migration target file.Type: ApplicationFiled: May 21, 2012Publication date: November 15, 2012Applicant: Hitachi, Ltd.Inventors: Yutaka Enko, Masaaki Iwasaki, Yoji Nakatani
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Patent number: 8190573Abstract: The present invention relates to a migration of a file from a path denotative NAS server to an ID denotative NAS server. In a file management device according to one embodiment, a migration-use path denotative NAS access section obtains a file deposit location from the path denotative NAS server, selects a migration target file based on the deposit location, and sends a read request with the deposit location of the migration target file to the path denotative NAS server, so as to obtain the migration target file. A migration-use denotative NAS access section 44 generates a write request with the migration target file, sends it to the ID denotative NAS servers, and writes the file therein. In addition, the migration-use ID denotative NAS access section registers a GUID received from the ID denotative NAS servers in a file name/GUID management table, together with the file name of the migration target file.Type: GrantFiled: December 4, 2008Date of Patent: May 29, 2012Assignee: Hitachi, Ltd.Inventors: Yutaka Enko, Masaaki Iwasaki, Yoji Nakatani
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Patent number: 7624091Abstract: A meta data server 100, a user node 200 and a storage device 300 are connected together via a Fibre channel 10 and a LAN 20 to configure a NAS over SAN system. The user node 200 sends out a request to access the data in each file. The file is stored in the storage device 300 in blocks of default size. The meta data server 100 informs the user node 200 of the block number where the file to be accessed is stored based on meta data in which relationship between a file and a block is recorded. Prior to this processing, the meta data server 100 instructs the storage device 300 to cache the data in advance. This application enables the storage device 300 to provide the data promptly in response to read request from the user node 200.Type: GrantFiled: February 26, 2004Date of Patent: November 24, 2009Assignee: Hitachi, Ltd.Inventor: Yutaka Enko
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Publication number: 20090228496Abstract: In order to access a distributed file system (DFS) of the present invention using a conventional protocol such as the one for an NFS or a CIFS without making a modification on a client side, a gateway unit for receiving a conventional protocol and performing processing in conformity the protocol is provided for a DFS server. The gateway unit emulates a directory structure in a file system such as the NFS or CIFS. When the DFS is a write-once read-many file system, update processing is converted into processing for creating a new generation file, and reference processing is converted into access to a latest generation file in a generation-managed file group. The gateway unit then accesses a DFS file via a DFS processing unit.Type: ApplicationFiled: May 8, 2009Publication date: September 10, 2009Applicant: HITACHI, LTD.Inventors: Yoji Nakatani, Masaaki Iwasaki, Yutaka Enko
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Patent number: 7548959Abstract: In order to access a distributed file system (DFS) of the present invention using a conventional protocol such as the one for an NFS or a CIFS without making a modification on a client side, a gateway unit for receiving a conventional protocol and performing processing in conformity the protocol is provided for a DFS server. The gateway unit emulates a directory structure in a file system such as the NFS or CIFS. When the DFS is a write-once read-many file system, update processing is converted into processing for creating a new generation file, and reference processing is converted into access to a latest generation file in a generation-managed file group. The gateway unit then accesses a DFS file via a DFS processing unit.Type: GrantFiled: March 4, 2008Date of Patent: June 16, 2009Assignee: Hitachi, Ltd.Inventors: Yoji Nakatani, Masaaki Iwasaki, Yutaka Enko
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Publication number: 20090089298Abstract: The present invention relates to a migration of a file from a path denotative NAS server to an ID denotative NAS server. In a file management device according to one embodiment, a migration-use path denotative NAS access section obtains a file deposit location from the path denotative NAS server, selects a migration target file based on the deposit location, and sends a read request with the deposit location of the migration target file to the path denotative NAS server, so as to obtain the migration target file. A migration-use denotative NAS access section 44 generates a write request with the migration target file, sends it to the ID denotative NAS servers, and writes the file therein. In addition, the migration-use ID denotative NAS access section registers a GUID received from the ID denotative NAS servers in a file name/GUID management table, together with the file name of the migration target file.Type: ApplicationFiled: December 4, 2008Publication date: April 2, 2009Applicant: Hitachi, Ltd.Inventors: Yutaka ENKO, Masaaki Iwasaki, Yoji Nakatani
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Patent number: 7472143Abstract: In a network system in which clients and file servers are connected by networks and a client makes access to a file stored in a disk storage device of a file server via the networks, accessibility to a file of a file server distant from the client tends to be deteriorated. In order to resolve the problem, the file server having the file searches for an appropriate file server in the proximity of the client and transfers the file to the appropriate file server (migration target server). Thereafter, the client makes access to the migration target server for the file.Type: GrantFiled: August 20, 2003Date of Patent: December 30, 2008Assignee: Hitachi, Ltd.Inventors: Yutaka Enko, Naohiro Fujii
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Patent number: 7469260Abstract: The present invention relates to a migration of a file from a path denotative NAS server to an ID denotative NAS server. In a file management device according to one embodiment, a migration-use path denotative NAS access section obtains a file deposit location from the path denotative NAS server, selects a migration target file based on the deposit location, and sends a read request with the deposit location of the migration target file to the path denotative NAS server, so as to obtain the migration target file. A migration-use denotative NAS access section 44 generates a write request with the migration target file, sends it to the ID denotative NAS servers, and writes the file therein. In addition, the migration-use ID denotative NAS access section registers a GUID received from the ID denotative NAS servers in a file name/GUID management table, together with the file name of the migration target file.Type: GrantFiled: August 28, 2003Date of Patent: December 23, 2008Assignee: Hitachi, Ltd.Inventors: Yutaka Enko, Masaaki Iwasaki, Yoji Nakatani
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Patent number: 7424536Abstract: A computer system is structured, including a plurality of computers sharing a storage apparatus. The computers each include a control section for determining an access priority based on an attribute of a client computer forwarding an access request. In the control section, the result derived by adding up the priorities is compared with the total value of the priorities calculated by other computers for assignment of an input/output bandwidth. In accordance with the priority assignment, access execution is performed in order of priority. With such a structure, access congestions can be favorably avoided through efficient bandwidth control, and bandwidth assignment can be performed on a server basis in accordance with processes executed by the client computers.Type: GrantFiled: October 15, 2004Date of Patent: September 9, 2008Assignee: Hitachi, Ltd.Inventors: Masami Hiramatsu, Satoshi Oshima, Yutaka Enko
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Publication number: 20080168170Abstract: In order to access a distributed file system (DFS) of the present invention using a conventional protocol such as the one for an NFS or a CIFS without making a modification on a client side, a gateway unit for receiving a conventional protocol and performing processing in conformity the protocol is provided for a DFS server. The gateway unit emulates a directory structure in a file system such as the NFS or CIFS. When the DFS is a write-once read-many file system, update processing is converted into processing for creating a new generation file, and reference processing is converted into access to a latest generation file in a generation-managed file group. The gateway unit then accesses a DFS file via a DFS processing unit.Type: ApplicationFiled: March 4, 2008Publication date: July 10, 2008Inventors: Yoji Nakatani, Masaaki Iwasaki, Yutaka Enko
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Patent number: 7363352Abstract: In order to access a distributed file system (DFS) of the present invention using a conventional protocol such as the one for an NFS or a CIFS without making a modification on a client side, a gateway unit for receiving a conventional protocol and performing processing in conformity the protocol is provided for a DFS server. The gateway unit emulates a directory structure in a file system such as the NFS or CIFS. When the DFS is a write-once read-many file system, update processing is converted into processing for creating a new generation file, and reference processing is converted into access to a latest generation file in a generation-managed file group. The gateway unit then accesses a DFS file via a DFS processing unit.Type: GrantFiled: July 19, 2006Date of Patent: April 22, 2008Assignee: Hitachi, Ltd.Inventors: Yoji Nakatani, Masaaki Iwasaki, Yutaka Enko
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Patent number: 7284041Abstract: In order to access a distributed file system (DFS) of the present invention using a conventional protocol such as the one for an NFS or a CIFS without making a modification on a client side, a gateway unit for receiving a conventional protocol and performing processing in conformity the protocol is provided for a DFS server. The gateway unit emulates a directory structure in a file system such as the NFS or CIFS. When the DFS is a write-once read-many file system, update processing is converted into processing for creating a new generation file, and reference processing is converted into access to a latest generation file in a generation-managed file group. The gateway unit then accesses a DFS file via a DFS processing unit.Type: GrantFiled: August 9, 2005Date of Patent: October 16, 2007Assignee: Hitachi, Ltd.Inventors: Yoji Nakatani, Masaaki Iwasaki, Yutaka Enko
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Patent number: 7206864Abstract: Providing a network protocol processing device by which a server connected to a network logically parted on a user basis can offload TCP protocol processing. In a server having a network protocol processing function including: a host processor that processes user requests received through a network; and TOE equipment including a network port that is connected with the host processor, and connected with the network, a processor that performs TCP/IP protocol processing, and a memory that holds TCP connection identification information, information indicating a source IP address, a destination IP address, a source port number, and a destination port number, and frame information including VLAN-ID defined by IEEE802.1Q are used as TCP connection identification information.Type: GrantFiled: July 2, 2004Date of Patent: April 17, 2007Assignee: Hitachi, Ltd.Inventors: Yutaka Enko, Yoji Nakatani, Takahiro Nakano
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Patent number: 7143146Abstract: In order to access a distributed file system (DFS) of the present invention using a conventional protocol such as the one for an NFS or a CIFS without making a modification on a client side, a gateway unit for receiving a conventional protocol and performing processing in conformity the protocol is provided for a DFS server. The gateway unit emulates a directory structure in a file system such as the NFS or CIFS. When the DFS is a write-once read-many file system, update processing is converted into processing for creating a new generation file, and reference processing is converted into access to a latest generation file in a generation-managed file group. The gateway unit then accesses a DFS file via a DFS processing unit.Type: GrantFiled: August 20, 2003Date of Patent: November 28, 2006Assignee: Hitachi, Ltd.Inventors: Yoji Nakatani, Masaaki Iwasaki, Yutaka Enko
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Publication number: 20060259611Abstract: In order to access a distributed file system (DFS) of the present invention using a conventional protocol such as the one for an NFS or a CIFS without making a modification on a client side, a gateway unit for receiving a conventional protocol and performing processing in conformity the protocol is provided for a DFS server. The gateway unit emulates a directory structure in a file system such as the NFS or CIFS. When the DFS is a write-once read-many file system, update processing is converted into processing for creating a new generation file, and reference processing is converted into access to a latest generation file in a generation-managed file group. The gateway unit then accesses a DFS file via a DFS processing unit.Type: ApplicationFiled: July 19, 2006Publication date: November 16, 2006Inventors: Yoji Nakatani, Masaaki Iwasaki, Yutaka Enko
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Publication number: 20060080457Abstract: A computer system is structured, including a plurality of computers sharing a storage apparatus. The computers each include a control section for determining an access priority based on an attribute of a client computer forwarding an access request. In the control section, the result derived by adding up the priorities is compared with the total value of the priorities calculated by other computers for assignment of an input/output bandwidth. In accordance with the priority assignment, access execution is performed in order of priority. With such a structure, access congestions can be favorably avoided through efficient bandwidth control, and bandwidth assignment can be performed on a server basis in accordance with processes executed by the client computers.Type: ApplicationFiled: October 15, 2004Publication date: April 13, 2006Inventors: Masami Hiramatsu, Satoshi Ishima, Yutaka Enko
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Publication number: 20060067335Abstract: Provided is a method of managing a network system including a computer device which processes data, a storage system which is used in the computer device to store data, and a switch which connects the computer device and the storage system to each other. The storage system sets VLANs and the priority of each of the VLANs on the switch, VLANs including at least one of a control VLAN transferring mainly control data, and at least one of a user VLAN transferring data other than the control data. The switch transfers data in a manner that allows the VLANs of higher priority to precede the VLANs of lower priority. Therefore the storage system manages a network in accordance with the level of load or the like of respective VLANs.Type: ApplicationFiled: November 16, 2004Publication date: March 30, 2006Inventors: Yuzuru Maya, Yutaka Enko
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Publication number: 20050267982Abstract: In order to access a distributed file system (DFS) of the present invention using a conventional protocol such as the one for an NFS or a CIFS without making a modification on a client side, a gateway unit for receiving a conventional protocol and performing processing in conformity the protocol is provided for a DFS server. The gateway unit emulates a directory structure in a file system such as the NFS or CIFS. When the DFS is a write-once read-many file system, update processing is converted into processing for creating a new generation file, and reference processing is converted into access to a latest generation file in a generation-managed file group. The gateway unit then accesses a DFS file via a DFS processing unit.Type: ApplicationFiled: August 9, 2005Publication date: December 1, 2005Applicant: Hitachi, Ltd.Inventors: Yoji Nakatani, Masaaki Iwasaki, Yutaka Enko
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Publication number: 20050246450Abstract: Providing a network protocol processing device by which a server connected to a network logically parted on a user basis can offload TCP protocol processing. In a server having a network protocol processing function including: a host processor that processes user requests received through a network; and TOE equipment including a network port that is connected with the host processor, and connected with the network, a processor that performs TCP/IP protocol processing, and a memory that holds TCP connection identification information, information indicating a source IP address, a destination IP address, a source port number, and a destination port number, and frame information including VLAN-ID defined by IEEE802.1Q are used as TCP connection identification information.Type: ApplicationFiled: July 2, 2004Publication date: November 3, 2005Inventors: Yutaka Enko, Yoji Nakatani, Takahiro Nakano