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公开(公告)号：US20210149590A1
公开(公告)日：2021-05-20
申请号：US16689127
申请日：2019-11-20
发明人： Tsuyoshi Miyamura , Hiroshi Itagaki , Shinsuke Mitsuma , Tohru Hasegawa , Noriko Yamamoto , Sosuke Matsui
IPC分类号： G06F3/06
摘要： 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.
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公开(公告)号：US10698828B2
公开(公告)日：2020-06-30
申请号：US15950085
申请日：2018-04-10
发明人： Noriko Yamamoto , Tsuyoshi Miyamura , Tohru Hasegawa , Hiroshi Itagaki , Shinsuke Mitsuma , Sosuke Matsui
IPC分类号： G06F3/00 , G06F12/0868 , G06F3/06 , G11B5/008
摘要： A computer-implemented method, according to one embodiment, includes: sending one or more instructions to calculate a combined size of fragments included in the fragmented files, sending one or more instructions to designate a portion of cache which corresponds to at least the combined size of the fragments, sending one or more instructions to send a copy of each non-fragmented file from a first drive directly to a second drive in which the second sequential storage medium is loaded, sending one or more instructions to use the designated portion of the cache to accumulate the fragments included in the fragmented files, and sending one or more instructions to send a copy of each of the fragments corresponding to a given fragmented file from the cache to the second drive in response to determining that all of the fragments corresponding to the given fragmented file have been accumulated in the cache.
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公开(公告)号：US10579294B2
公开(公告)日：2020-03-03
申请号：US16290742
申请日：2019-03-01
发明人： Tohru Hasegawa , Hiroshi Itagaki , Sosuke Matsui , Shinsuke Mitsuma , Tsuyoshi Miyamura , Noriko Yamamoto
IPC分类号： G06F3/06
摘要： According to one embodiment there is provided a method for managing a location of an object in a storage system having hierarchical storage with a plurality of storage layers. The method includes transmitting a get-list request for viewing contents of a designated directory on the hierarchical storage. The method also includes receiving a response to the get-list request, the response including a list of objects in the designated directory and listing each storage layer corresponding to the objects. The list is output, and a select request to select a different storage layer for one of the objects is received. The select request is transmitted to the storage system for invoking migration of the selected object to the different storage layer. A second response is received from the storage system indicating the selected object is stored in the different storage layer, and an updated list is output.
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公开(公告)号：US20200042229A1
公开(公告)日：2020-02-06
申请号：US16575520
申请日：2019-09-19
发明人： Tsuyoshi Miyamura , Sosuke Matsui , Tohru Hasegawa , Hiroshi Itakagi , Noriko Yamamoto , Shinsuke Mitsuma
IPC分类号： G06F3/06
摘要： 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.
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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：US10169346B2
公开(公告)日：2019-01-01
申请号：US14822068
申请日：2015-08-10
IPC分类号： G06F17/30
摘要： A method, executed by at least one processor, includes receiving a migration request for a plurality of files, assigning files of the plurality of files that are smaller than a selected size to one or more small-file secondary storage devices, assigning files of the plurality of files that are larger than the selected size to one or more large-file secondary storage devices, and initiating migration of the plurality of files from one or more primary storage devices to the secondary storage devices to which they are assigned. A corresponding computer program product and computer system are also disclosed herein.
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公开(公告)号：US10120612B2
公开(公告)日：2018-11-06
申请号：US15402589
申请日：2017-01-10
发明人： Tohru Hasegawa , Hiroshi Itagaki , Sosuke Matsui , Shinsuke Mitsuma , Tsuyoshi Miyamura , Noriko Yamamoto
摘要： An apparatus, method, system, and program product are disclosed for tape copying. One method includes mounting a first source tape of multiple source tapes on a source tape drive. The method includes mounting a destination tape on a destination tape drive. The method also includes copying a first index of an index partition of the first source tape to a first copied index of an index partition of the destination tape. The method includes storing first position information corresponding to the first copied index on the destination tape. The method also includes copying first data of a data partition of the first source tape to a first copied data of a data partition of the destination tape. The method includes storing second position information corresponding to the first copied data on the destination tape.
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公开(公告)号：US10025792B2
公开(公告)日：2018-07-17
申请号：US15065791
申请日：2016-03-09
摘要： According to one embodiment, a method includes presenting a medium to more than one user as being exclusively occupied by whichever user attempts to access at least one file from the medium, writing a first file managed by a first user to a data partition of the medium, and storing a first user identifier (ID) that identifies the first user as metadata to an index partition of the medium in response to writing the first file managed by the first user. In another embodiment, a method includes reading metadata from an index partition of a medium from a first user of a plurality of users, extracting first file attribute information associated with a first user ID that indicates a first user from the metadata, and reading a first file based on the first file attribute information associated with the first user ID from a data partition of the medium.
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公开(公告)号：US20180101539A1
公开(公告)日：2018-04-12
申请号：US15851937
申请日：2017-12-22
发明人： Tohru Hasegawa , Hiroshi Itagaki , Sosuke Matsui , Shinsuke Mitsuma , Tsuyoshi Miyamura , Noriko Yamamoto
CPC分类号： G06F17/30082 , G06F11/1448 , G06F17/30088 , G06F17/30115 , G06F21/62
摘要： A method to identify data elements conforming to a policy includes receiving a request to identify data elements in an input set of data elements that conform to one or more requested policies. According to the method, policy output information describing data elements that conform to a requested policy are saved in association with the requested policy. In response to receiving a subsequent request to identify data elements in a subsequent set of data elements that conform to the requested policy, the method includes outputting the saved policy output information based on the policy output information having been saved in association with the requested policy. A computer program product and a system, configured with processors and a memory that can store saved policy information, can implement the method.
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公开(公告)号：US09940338B2
公开(公告)日：2018-04-10
申请号：US15172399
申请日：2016-06-03
IPC分类号： G06F17/30
CPC分类号： G06F17/30174 , G06F17/30091 , G06F17/30371
摘要： A mechanism is provided for improved file synchronization of a magnetic tape. A destination device determines whether one or more file checksums exist in an extended file attribute associated with an identified file. Responsive to one or more file checksums existing in the extended file attribute associated with the identified file, the destination device reads the one or more file checksums out of the extended file attribute without accessing the magnetic tape. The destination device transmits the one or more file checksums to a source device. The source device segments the data of the new file into fixed-length blocks that do not overlap one another. The source device calculates one or more new file checksums for each of the fixed-length blocks. The source device transmits the one or more new file checksums to the destination device.
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