Patents by Inventor Tohru Hasegawa

Tohru Hasegawa 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).

  • READING SEQUENTIALLY STORED FILES BASED ON READ AHEAD GROUPS
    Publication number: 20210149590
    Abstract: A plurality of files are stored on magnetic tape having at least one wrap for storing data sets. Each data set includes one or more records. A number of data sets that will remain in a buffer memory after performing a read ahead operation is determined. A number of records that are likely to remain in the buffer memory after performing a read ahead operation is determined. For each record likely to remain in the buffer memory after performing a read ahead operation, positions of the records on the magnetic tape are determined. Each file of the plurality of files are classified into one group of a plurality of groups based on a position of a record corresponding with each respective file and the number of records that are likely to remain in the buffer memory after performing a read ahead operation.
    Type: Application
    Filed: November 20, 2019
    Publication date: May 20, 2021
    Inventors: Tsuyoshi Miyamura, Hiroshi Itagaki, Shinsuke Mitsuma, Tohru Hasegawa, Noriko Yamamoto, Sosuke Matsui
  • Optimized tape drive unmounting
    Patent number: 11010104
    Abstract: A computer-implemented method for faster unmount of tape drives includes generating a batch file to be migrated from a primary storage to a tape media acting as a secondary storage. The size of the batch file is determined based on an amount of available storage space on the tape media between a position in a longitudinal direction of storage (LPOS) and longitudinal position three (LP3) on the tape media. The computer-implemented method further includes migrating the batch file from the primary storage to the tape media mounted on a tape drive. Upon completion of migrating the batch file, the LPOS is within a predetermined threshold distance of LP3 on the tape media.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: May 18, 2021
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Hiroshi Itagaki, Tsuyoshi Miyamura, Shinsuke Mitsuma, Noriko Yamamoto, Sosuke Matsui
  • OPTIMIZING TIMING FOR DATA MIGRATION FROM OLD GENERATION TAPES TO NEW GENERATION TAPES
    Publication number: 20210117105
    Abstract: A computer-implemented method, a computer program product, and a computer system for optimizing timing for migrating data. The computer system sets a migration required flag for each of first tapes, in response to determining an estimated time period required for data migration from the first tapes to second tapes being smaller than an expiration time period of the first tapes. The computer system sets the migration required flag for a respective one of the first tapes, in response to determining the estimated time period being not smaller than the expiration time period and a predetermined time period has passed for the respective one of the first tapes. Data on tapes that migration required flags are set is to be migrated to the second tapes.
    Type: Application
    Filed: October 22, 2019
    Publication date: April 22, 2021
    Inventors: Hiroshi Itagaki, Shinsuke Mitsuma, Tohru Hasegawa, Tsuyoshi Miyamura, Noriko Yamamoto, Sosuke Matsui
  • Writing data to tape medium
    Patent number: 10983716
    Abstract: A computer-implemented method for writing data to a tape medium, includes: writing a file of a first content to the tape medium; writing at least a part of the file of a second content to the tape medium, the second content being obtained by updating the first content; and writing an index including first metadata and second metadata to the tape medium, the first metadata being metadata of the file of the first content, the second metadata being metadata of the file of the second content.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: April 20, 2021
    Assignee: International Business Machines Corporation
    Inventors: Shinsuke Mitsuma, Tsuyoshi Miyamura, Tohru Hasegawa, Noriko Yamamoto, Sosuke Matsui
  • Text extraction and processing
    Patent number: 10963490
    Abstract: A system, computer program product, and method are provided to selectively index one or more subsets of documents or files. As data is extracted from a document or file, extracted text is organized into data portions and subject to evaluations. Meta characteristic data is leveraged to assess the extracted text. One or more subsets of the organized data portions are selectively identified and subject to enrichment processing, which creates and returns enriched and indexed subsets of the documents or files.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: March 30, 2021
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Hiroaki Uetsuki, Shunsuke Ishikawa, Issei Yoshida, Asako Ono, Yasuyuki Tominaga, Kenta Watanabe, Hiroaki Kikuchi
  • OPTIMIZED TAPE DRIVE UNMOUNTING
    Publication number: 20210064298
    Abstract: A computer-implemented method for faster unmount of tape drives includes generating a batch file to be migrated from a primary storage to a tape media acting as a secondary storage. The size of the batch file is determined based on an amount of available storage space on the tape media between a position in a longitudinal direction of storage (LPOS) and longitudinal position three (LP3) on the tape media. The computer-implemented method further includes migrating the batch file from the primary storage to the tape media mounted on a tape drive. Upon completion of migrating the batch file, the LPOS is within a predetermined threshold distance of LP3 on the tape media.
    Type: Application
    Filed: September 4, 2019
    Publication date: March 4, 2021
    Inventors: Tohru Hasegawa, Hiroshi Itagaki, Tsuyoshi Miyamura, Shinsuke Mitsuma, Noriko Yamamoto, Sosuke Matsui
  • WEB-SOURCED DEVICE CONTROL
    Publication number: 20210049200
    Abstract: A method, computer program product and computer system are provided to promote device usage compliance. A processor retrieves a current position for a device. A processor determines at least one nearby location based on the current position of the device. A processor retrieves search data regarding the at least one nearby location. A processor determines compliance information regarding the at least one location based, at least in part, on the search data. A processor configures the device based on the compliance information regarding the at least one location.
    Type: Application
    Filed: August 12, 2019
    Publication date: February 18, 2021
    Inventors: KENTA WATANABE, SHUNSUKE ISHIKAWA, ASAKO ONO, HIROAKI UETSUKI, YASUYUKI TOMINAGA, TOHRU HASEGAWA, ISSEI YOSHIDA
  • LINKING CONTEXTUAL INFORMATION TO TEXT IN TIME DEPENDENT MEDIA
    Publication number: 20210042393
    Abstract: Time dependent media (TDM) content is received, and text features and non-text features are extracted from the TDM content. The TDM content is split into two or more documents. A document, which includes non-text features from the extracted non-text features, is selected. Non-text features in the document are compared to context patterns. When a context pattern matches a non-text feature in the document, a context element linked to the context pattern is linked to the non-text feature as well. The TDM content is modified based on the context element.
    Type: Application
    Filed: August 8, 2019
    Publication date: February 11, 2021
    Inventors: Shunsuke Ishikawa, Yasuyuki Tominaga, Hiroaki Uetsuki, Asako Ono, Tohru Hasegawa, Issei Yoshida, Kenta Watanabe
  • Reading and writing via file system for tape recording system
    Patent number: 10915244
    Abstract: Communicating data with a medium is provided. A cache is provided for storing target data of a file identified by an access request from an application of a host. The cache is divided into a read cache, a write cache, and an index cache. Responsive to receiving the access request: the medium is loaded onto a drive using a file system; target data is stored to the write cache and to the read cache; and the index file stored in the index cache is updated to reflect position metadata about the target data stored in the write cache. Responsive to initiating unloading of the medium from the drive: the updated index file stored in the index cache is written to the index partition of the medium; and the target data stored in the write cache is written onto a data partition of the medium without using the file system.
    Type: Grant
    Filed: May 16, 2019
    Date of Patent: February 9, 2021
    Assignee: International Business Machines Corporation
    Inventors: Takashi Ashida, Tohru Hasegawa, Hiroshi Itagaki, Shinsuke Mitsuma, Terue Watanabe
  • ELECTROCHROMIC DEVICE, CONTROL DEVICE OF ELECTROCHROMIC DEVICE, AND CONTROL METHOD OF ELECTROCHROMIC DEVICE
    Publication number: 20210033939
    Abstract: An electrochromic device includes: an electrochromic element operating in at least one of a first optical characteristic state and a second optical characteristic state; and a temperature measuring device configured to measure temperature, and circuitry to control voltage to be applied to the electrochromic element such that the second optical characteristic state becomes constant irrespective of the measured temperature.
    Type: Application
    Filed: July 14, 2020
    Publication date: February 4, 2021
    Inventors: Tohru HASEGAWA, Keiichiroh Yutani
  • Managing index writes to a tape medium
    Patent number: 10902872
    Abstract: Aspects of the present disclosure relate to managing index writes within a tape. A determination can be made that a change was made to at least one file stored within a tape medium while the tape medium was mounted within a tape drive. In response to the determination, an index can be written to a data partition of the tape medium. A determination can be made whether the change included any changes to a file at least equal to a threshold hierarchy level. In response to determining that the change did not include any changes to a file at least equal to the threshold hierarchy level, a first instruction can be issued to the tape drive to reposition the tape medium to the end of the tape. A second instruction can be issued to the tape drive to perform an unthread operation at low tension to rewind the tape medium.
    Type: Grant
    Filed: October 31, 2019
    Date of Patent: January 26, 2021
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Hiroshi Itagaki, Tsuyoshi Miyamura, Shinsuke Mitsuma, Noriko Yamamoto, Sosuke Matsui
  • Multiple tape video data splitter
    Patent number: 10897593
    Abstract: An approach, for storing video data in a plurality of tape media via a ring buffer. A tape data splitter receives video data stored in a ring buffer. The tape data splitter writes the video data to a current tape media. The tape data splitter detects an end of tape media event. The tape data splitter responds to the end of tape media event, by switching the current tape media to a next tape media. The tape data splitter selects a resume point for the video data stored in the ring buffer and writes to the next tape media, the video data stored in the ring buffer that is subsequent to the resume point.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: January 19, 2021
    Assignee: International Business Machines Corporation
    Inventors: Hiroshi Araki, Shinobu Fujihara, Tohru Hasegawa, Takeshi Ishimoto, Hiroshi Itagaki, Hiroyuki Miyoshi, Yutaka Oishi
  • File access control on magnetic tape by encrypting metadata
    Patent number: 10895994
    Abstract: A tape drive-implemented method for encrypting metadata on a magnetic tape, the tape drive-implemented method, according to one embodiment, includes: writing an index to a magnetic tape. The index includes: metadata corresponding to a file stored on the magnetic tape, and metadata corresponding to a directory structure of the file. The tape drive-implemented method additionally includes: using a first key to encrypt a first portion of the metadata in the index corresponding to the file, and using a second key to encrypt a first portion of the metadata in the index corresponding to the directory structure of the file. Other systems, methods, and computer program products are described in additional embodiments.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: January 19, 2021
    Assignee: International Business Machines Corporation
    Inventors: Atsushi Abe, Tohru Hasegawa
  • Tape drive data reclamation
    Patent number: 10884649
    Abstract: Method, computer program product, and system embodiments of the present disclosure may include a computing device which may set a predetermined flag on data to be copied from a primary storage tier and a secondary storage tier. The computing device may identify a first portion of the flagged data as being in a pre-migrated state stored on the primary storage tier and migrate the flagged pre-migrated data from the primary storage tier to a target medium. The computing device may identify a second portion of the flagged data as being in a migrated state stored on the secondary storage tier. The computing device may recall the flagged migrated data from the secondary storage tier to the primary storage tier and migrate the recalled migrated data from the primary storage tier to the target medium.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: January 5, 2021
    Assignee: International Business Machines Corporation
    Inventors: Tsuyoshi Miyamura, Sosuke Matsui, Tohru Hasegawa, Hiroshi Itakagi, Noriko Yamamoto, Shinsuke Mitsuma
  • OPTICAL ELEMENT AND SPECTACLES
    Publication number: 20200409182
    Abstract: An optical element using an electrochromic material capable of switching between a transparent state and a coloring state, includes a spectrum assisting visual functions or visual perception ability, the spectrum being used for visual recognition of the optical element in the coloring state.
    Type: Application
    Filed: June 26, 2020
    Publication date: December 31, 2020
    Inventors: Yuuya ENDOH, Tetsuro Tanigawa, Noboru Sasa, Keiichiroh Yutani, Tohru Hasegawa, Naoki Ura
  • REORDERING A SEQUENCE OF FILES BASED ON COMPRESSION RATES IN DATA TRANSFER
    Publication number: 20200371720
    Abstract: A computer-implemented method, a computer program product, and a computer system for reordering a sequence of files based on compression rates in data transfer. A host determines predicted compression rates of first files that are to be saved onto a first tape, based on a relationship between compression rates and file attributes of second files that have been saved on a second tape. The host reorders a sequence of the first files stored in host cache storage and generates a new sequence of transferring the first files from the host cache storage to the tape drive hosting the first tape, based on the predicted compression rates of the first files. The host transfers the first files to the tape drive hosting the first tape and writes the first files to the first tape, according to the new sequence.
    Type: Application
    Filed: May 21, 2019
    Publication date: November 26, 2020
    Inventors: Noriko Yamamoto, Tsuyoshi Miyamura, Hiroshi Itagaki, Tohru Hasegawa, Shinsuke Mitsuma
  • Synchronizing data writes
    Patent number: 10831624
    Abstract: Aspects of the present disclosure relate to synchronizing data writes. An update to a file stored on a virtual tape image is received. A position and length of the file is recorded as an invalid data area. The virtual tape image is then synchronized with a tape. The invalid data area is then released from the virtual tape image.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: November 10, 2020
    Assignee: International Business Machines Corporation
    Inventors: Shinsuke Mitsuma, Tohru Hasegawa, Hiroshi Itagaki, Tsuyoshi Miyamura, Noriko Yamamoto
  • CACHING FILES IN A DIRECTORY
    Publication number: 20200341946
    Abstract: Provided is a method, computer program product, and system for enumerating files on a tape medium and a cache storage device. The method includes receiving a command to enumerate a directory stored on a tape medium. The directory includes a plurality of files. The method further includes determining that the directory has been at least partially cached to a cache storage device. The method further includes determining, for each file of the directory that is stored in the cache storage device, whether the file has been enumerated. In response to determining that the file has not been enumerated, the method includes returning information of the file as a response to the command. The method further includes mounting the tape medium in parallel to retrieving data from the cache storage device.
    Type: Application
    Filed: April 26, 2019
    Publication date: October 29, 2020
    Inventors: Tohru Hasegawa, HIROSHI ITAGAKI, Tsuyoshi Miyamura, NORIKO YAMAMOTO, Shinsuke Mitsuma
  • CACHING FILES IN A DIRECTORY
    Publication number: 20200341694
    Abstract: Provided is a method for writing and deleting files on a tape medium and a cache storage device. The method includes receiving a command to write one or more files of a directory to a tape medium. The method further includes identifying a cache limit associated with the tape medium. The method further comprises determining whether the amount of data of the directory that is already on the cache storage device exceeds the cache limit. In response to the amount of data not exceeding the cache limit, the method includes writing data of the one or more files to the cache storage device and the tape medium in parallel.
    Type: Application
    Filed: April 26, 2019
    Publication date: October 29, 2020
    Inventors: Tohru Hasegawa, HIROSHI ITAGAKI, Tsuyoshi Miyamura, NORIKO YAMAMOTO, Shinsuke Mitsuma
  • Management of a multi-library storage system
    Patent number: 10817207
    Abstract: A computer-implemented method for managing a first storage library and a second storage library, according to one embodiment, includes associating a first physical tape and a second physical tape with a logical tape. The associating includes writing a first identifier to an index of the logical tape. The first identifier represents the first physical tape and the first storage library. The associating further includes writing a second identifier to the index of the logical tape. The second identifier represents the second physical tape and the second storage library. The computer-implemented method further includes storing the index of the logical tape in memory, and displaying the logical tape by reading the index from memory as a file system.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: October 27, 2020
    Assignee: International Business Machines Corporation
    Inventors: Hiroshi Itagaki, Tohru Hasegawa, Shinsuke Mitsuma, Tsuyoshi Miyamura, Noriko Yamamoto, Sosuke Matsui