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公开(公告)号：US20190280711A1
公开(公告)日：2019-09-12
申请号：US16426010
申请日：2019-05-30
发明人： Kousei Kawamura , Koichi Masuda , Sosuke Matsui , Yutaka Oishi , Takahiro Tsuda
IPC分类号： H03M7/30 , G06F16/178
摘要： A storage system receives one or more records from a host system. The records are compressed in a first compression format that is native to the host system. The storage system identifies an incompatibility between the first compression format and a first operation of the storage system. In response to the identified incompatibility, the storage system decompresses the received records. The decompression is based on the first compression format. The storage system compresses the decompressed records in a second compression format. The storage system stores the secondarily compressed records onto a storage medium.
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公开(公告)号：US20190250844A1
公开(公告)日：2019-08-15
申请号：US15894131
申请日：2018-02-12
发明人： Kousei Kawamura , Koichi Masuda , Sosuke Matsui , Shinsuke Mitsuma , Takeshi Nohta , Takahiro Tsuda
IPC分类号： G06F3/06
摘要： Embodiments provide a method, a system, and a computer program product for performing copy operations of one or more data units in a hierarchical storage management (HSM) system. The HSM system includes an upper layer and a lower layer. The upper layer includes multiple storage nodes having a grid configuration. The method comprises scheduling a copy operations of multiple data units each of which is stored in at least one of the multiple storage nodes such that loads on the copy operations are distributed among the multiple storage nodes in which the multiple data units are stored and copying the multiple data units to the lower layer in accordance with the scheduling.
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公开(公告)号：US09830104B2
公开(公告)日：2017-11-28
申请号：US15421463
申请日：2017-02-01
发明人： Kousei Kawamura , Koichi Masuda , Sosuke Matsui , Yutaka Oishi , Takahiro Tsuda
CPC分类号： G06F3/0644 , G06F3/0604 , G06F3/0643 , G06F3/0682 , G06F17/30315 , G11B5/00817 , G11B20/1201 , G11B27/032 , G11B27/107 , G11B2020/1295 , G11B2220/95
摘要： A method for writing data from a table to a tape includes setting a number of partitions on the tape, where the number of partitions is greater than or equal to a number of columns of the table to be written to the tape, and writing data from each column of the table to at least one partition of the tape, the at least one partition including two or more wraps, the data is written from a top of the two or more wraps towards a bottom of the two or more wraps in a direction of a width of the at least one partition. The written data is reciprocated from a beginning of the tape to an end of the tape in a longitudinal direction of the tape such that writing of a last data entry of one column ends at a beginning of the two or more wraps.
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公开(公告)号：US20170179978A1
公开(公告)日：2017-06-22
申请号：US14970677
申请日：2015-12-16
发明人： Kousei Kawamura , Koichi Masuda , Sosuke Matsui , Yutaka Oishi , Takahiro Tsuda
CPC分类号： H03M7/60 , G06F16/1794 , H03M7/30 , H03M7/6041
摘要： A storage system receives one or more records from a host system. The records are compressed in a first compression format that is native to the host system. The storage system identifies an incompatibility between the first compression format and a first operation of the storage system. In response to the identified incompatibility, the storage system decompresses the received records. The decompression is based on the first compression format. The storage system compresses the decompressed records in a second compression format. The storage system stores the secondarily compressed records onto a storage medium.
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公开(公告)号：US10831374B2
公开(公告)日：2020-11-10
申请号：US15371057
申请日：2016-12-06
发明人： Kousei Kawamura , Koichi Masuda , Sosuke Matsui , Jun Tanaka , Takahiro Tsuda
IPC分类号： G06F3/06 , G06F12/0802
摘要： A computer-implemented method, according to one embodiment, includes assigning one or more first-type tape cartridges to an upper tape layer of a hierarchical storage management system, assigning one or more second-type tape cartridges to a lower tape layer of the hierarchical storage management system, and moving, to the lower tape layer, data having lower access frequency and recorded in the first-type tape cartridge assigned to the upper tape layer. A length of a tape included in the second-type tape cartridge is longer than a length of a tape included in the first-type tape cartridge.
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公开(公告)号：US10585618B2
公开(公告)日：2020-03-10
申请号：US15876299
申请日：2018-01-22
发明人： Kousei Kawamura , Koichi Masuda , Sosuke Matsui , Yutaka Oishi , Takahiro Tsuda
摘要： A computer-implemented method for providing access to plural virtual sequential access volumes by using random access media, includes: accepting an operation for writing first data to a specific virtual sequential access volume of the plural virtual sequential access volumes; and storing a first file including the first data in the random access media, the first file being separate from a second file including second data stored in the random access media in response to an operation for writing the second data to the specific virtual sequential access volume.
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公开(公告)号：US20170371563A1
公开(公告)日：2017-12-28
申请号：US15194618
申请日：2016-06-28
发明人： Kousei Kawamura , Koichi Masuda , Sosuke Matsui , Yutaka Oishi , Takahiro Tsuda
IPC分类号： G06F3/06
CPC分类号： G06F3/061 , G06F3/0659 , G06F3/0682
摘要： An input to read two or more data records stored to a tape medium on a tape drive is received. A starting point is determined. The starting point is a closest data record, of the two or more data records, to a current position of a tape head of the tape drive. A read order of the two or more data records is determined. The read order is determined using an algorithm and the determined starting point. The determined read order is sent to a host device. A first data record is determined. A first locate operation within the tape drive is performed. The first data record, of the two or more data records stored on the tape medium, based on the determined read order is read. The first data record, of the two or more data records stored on the tape medium, is sent to the host device.
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公开(公告)号：US20170285958A1
公开(公告)日：2017-10-05
申请号：US15083393
申请日：2016-03-29
发明人： Kousei Kawamura , Koichi Masuda , Sosuke Matsui , Yutaka Oishi , Takahiro Tsuda
IPC分类号： G06F3/06
CPC分类号： G06F3/065 , G06F3/0611 , G06F3/0643 , G06F3/0664 , G06F3/0682 , G06F3/0686 , G06F12/0292
摘要： A computer-implemented method for providing access to plural virtual sequential access volumes by using random access media, includes: accepting an operation for writing first data to a specific virtual sequential access volume of the plural virtual sequential access volumes; and storing a first file including the first data in the random access media, the first file being separate from a second file including second data stored in the random access media in response to an operation for writing the second data to the specific virtual sequential access volume.
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公开(公告)号：US20170147253A1
公开(公告)日：2017-05-25
申请号：US14950447
申请日：2015-11-24
发明人： Kousei Kawamura , Koichi Masuda , Sosuke Matsui , Yutaka Oishi , Takahiro Tsuda
IPC分类号： G06F3/06
CPC分类号： G06F3/0638 , G06F3/0604 , G06F3/0647 , G06F3/0682 , G11B20/00007 , G11B2220/90
摘要： A method for operating a tape drive may include receiving a command to read a record stored on a tape by a tape drive having a capability to compress and decompress data. The tape drive compresses a record prior to writing the record to tape when a command to write the record to tape specifies that the record is to be compressed, and when a compressed size of the record is smaller than an uncompressed size of the record. The method further include reading the record from the tape by the tape drive, where the tape includes a plurality of compressed records and a plurality of uncompressed records. The method further includes determining by the tape drive whether the record is not compressed. The method may additionally include generating a compressed record by compressing the record by the tape drive when it is determined that the record is not compressed.
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公开(公告)号：US11119689B2
公开(公告)日：2021-09-14
申请号：US15979927
申请日：2018-05-15
发明人： Kousei Kawamura , Koichi Masuda , Takahiro Tsuda , Sosuke Matsui , Takeshi Nohta , Shinsuke Mitsuma
摘要： A computer-implemented method for maintaining a storage volume in a virtual tape system includes writing one or more logical volumes associated with a first category and one or more logical volumes associated with a second category to a primary storage in a virtual tape system. The computer-implemented method further includes performing a first automatic removal process in order to free up space on the primary storage, wherein the first automatic removal process removes logical volumes associated with the first category in priority to logical volumes associated with the second category. The computer-implemented method further includes performing a second automatic removal process, wherein the second automatic removal process dynamically alters the priority of the first automatic removal process such that one or more virtual volumes associated with the second category are removed in priority to one or more virtual volumes associated with the first category.
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