WO2022054401A1 - Dispositif, procédé et programme de traitement d'informations - Google Patents

Dispositif, procédé et programme de traitement d'informations Download PDF

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Publication number
WO2022054401A1
WO2022054401A1 PCT/JP2021/026636 JP2021026636W WO2022054401A1 WO 2022054401 A1 WO2022054401 A1 WO 2022054401A1 JP 2021026636 W JP2021026636 W JP 2021026636W WO 2022054401 A1 WO2022054401 A1 WO 2022054401A1
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Prior art keywords
objects
magnetic tape
information processing
combination
read out
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PCT/JP2021/026636
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English (en)
Japanese (ja)
Inventor
豊 大石
輝江 渡邊
理貴 近藤
優子 宇野
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富士フイルム株式会社
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Priority to JP2022547420A priority Critical patent/JPWO2022054401A1/ja
Publication of WO2022054401A1 publication Critical patent/WO2022054401A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/10—File systems; File servers
    • G06F16/11—File system administration, e.g. details of archiving or snapshots
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel

Definitions

  • the disclosed technology relates to information processing devices, information processing methods, and information processing programs.
  • the following technologies are known as technologies related to the transfer of data recorded on a magnetic tape to another magnetic tape.
  • Japanese Patent Application Laid-Open No. 2010-15263 is a device for supporting the transfer of data recorded on a first recording medium to a second recording medium, and is a device for supporting the transfer of each data recorded on the first recording medium.
  • a device for determining the recording position of each data in the second recording medium based on the access frequency is described. More specifically, the data and metadata are recorded in a place on the tape that is advantageous in terms of access performance, starting from the one with the highest access frequency.
  • Japanese Patent Application Laid-Open No. 2001-5701 describes a storage area in a rewritable information recording / playback device that records and reproduces data at a random position with respect to a storage area of a rewritable recording medium such as a CD-RW or DVD-RAM.
  • the division information storage means for storing the division information indicating the division area in which the divided data is recorded, and the continuous
  • the access frequency storage means that stores the access frequency for each partition area in correspondence with the divided partition information, and the divided partition information that has a high access frequency from the divided partition information stored in the divided partition information storage means.
  • defragmentation control means for selecting and re-recording the data recorded in each section area indicated by the divided section information in a continuous section area.
  • the object to be recorded is recorded on the magnetic tape in units of an object group (packed object) including a plurality of objects.
  • the object when the object is read from the magnetic tape on which the object is recorded in the unit of the packed object, all the objects included in the target packed object are read, and the object to be read is extracted from the objects. That is, the reading of the object is performed in the unit of the packed object. Therefore, when a plurality of objects to be read are included in a plurality of different packed objects, it is necessary to read all the objects included in the plurality of packed objects, including objects other than the object to be read. The time required for reading becomes long.
  • the packed object recorded at the migration destination has a different configuration from the packed object recorded on the magnetic tape at the migration source, so that the packed object recorded at the migration destination has a different configuration from the magnetic tape at the migration destination.
  • the time required for reading may be shortened.
  • the disclosed technology was made in view of the above circumstances, and aims to reduce the time required to read the object from the destination magnetic tape.
  • the information processing device is an information processing device including at least one processor, and the processor controls to read out a plurality of objects recorded on the magnetic tape of the migration source, and the plurality of objects read out.
  • the processor controls to read out a plurality of objects recorded on the magnetic tape of the migration source, and the plurality of objects read out.
  • a plurality of combinations in which the frequency read out within the same period is equal to or higher than the first threshold value, or a combination specified based on the ranking regarding the frequency read out within the same period are included in the combination. It constructs a group of objects that are a collection of objects, and controls recording of the group of objects on the destination magnetic tape.
  • the processor may construct an object group so that the total value of the number of objects or the data size included in one object group is equal to or less than a predetermined value.
  • the processor collects only the plurality of objects included in the combination for the combination of the second threshold value or more whose frequency read out within the same period is larger than the first threshold value. You may build a group of objects.
  • the processor continuously transfers a group of objects including only a plurality of objects included in a combination whose frequency of reading within the same period is equal to or higher than the second threshold value among the plurality of read objects to the magnetic destination. Control to record on tape may be performed.
  • the migration destination magnetic tape may be a magnetic tape different from the migration source magnetic tape. Further, the magnetic tape at the migration destination may be the same magnetic tape as the magnetic tape at the migration source.
  • the information processing method controls to read out a plurality of objects recorded on the magnetic tape of the migration source, and among the plurality of read objects, the frequency of reading out within the same period is the first. For combinations above the threshold or specified based on the order of frequency read out within the same period, an object group is constructed by collecting multiple objects included in the combination, and the object group is transferred to the destination magnetic tape.
  • This is an information processing method in which at least one processor included in the information processing apparatus executes a process of controlling recording on a tape.
  • the information processing program related to the disclosed technology controls to read out a plurality of objects recorded on the magnetic tape of the migration source, and among the plurality of read objects, the frequency of reading out within the same period is predetermined. For combinations that are greater than or equal to the first threshold, or combinations that are specified based on the order of frequency read out within the same period, an object group is constructed by combining multiple objects included in the combination, and the object group is used.
  • This is an information processing program for causing at least one processor included in the information processing apparatus to execute a process of controlling recording of an information processing on a destination magnetic tape.
  • FIG. 1 is a diagram showing a configuration of a recording / reproduction system 1 according to an embodiment of the disclosed technique.
  • the recording / playback system 1 constitutes a so-called object storage system, and stores objects requested to be stored by an external device (not shown) such as a user terminal connected to the recording / playback system 1 via a network.
  • an external device such as a user terminal connected to the recording / playback system 1 via a network.
  • An object is composed of a data body and metadata about the data body.
  • the recording / playback system 1 includes an information processing device 10 and a tape library 20.
  • the tape library 20 includes a plurality of slots (not shown) and a plurality of tape drives 40, and each slot stores a magnetic tape 30.
  • the tape drive 40 records (writes) an object on the magnetic tape 30 loaded in the tape drive 40 and reads an object from the magnetic tape 30 based on an instruction from the information processing apparatus 10.
  • the object for which storage is requested from an external device such as a user terminal is recorded on the magnetic tape 30.
  • An example of the magnetic tape 30 is an LTO (Linear Tape-Open) tape.
  • LTO Linear Tape-Open
  • FIG. 2 is a diagram showing an example of the hardware configuration of the information processing apparatus 10.
  • the information processing device 10 includes a CPU (Central Processing Unit) 101, a memory 102 as a temporary storage area, and a non-volatile storage unit 103. Further, the information processing apparatus 10 includes a display unit 104 such as a liquid crystal display, an input unit 105 including an input device such as a keyboard and a mouse, a network interface 106 connected to a network, and an external interface 107 to which a tape drive 40 is connected.
  • the CPU 101, the memory 102, the storage unit 103, the display unit 104, the input unit 105, the network interface 106, and the external interface 107 are connected to the bus 108.
  • the storage unit 103 is realized by a storage medium such as an HDD (Hard Disk Drive), an SSD (Solid State Drive), or a flash memory.
  • the information processing program 110 and the read log 120 are stored in the storage unit 103.
  • the CPU 101 reads the information processing program 110 from the storage unit 103, expands the information processing program 110 into the memory 102, and executes the program.
  • An example of the information processing apparatus 10 is a server computer or the like.
  • CPU101 is an example of a processor in the disclosed technology.
  • the information processing device 10 performs a packing process for collecting a plurality of objects for which storage is requested from an external device such as a user terminal.
  • An object group including a plurality of objects constructed by this packing process is hereinafter referred to as a packed object.
  • FIG. 3 is a diagram showing an example of the configuration of the packed object 50.
  • the object is referred to as "Obj".
  • one packed object 50 includes at least one object 51.
  • the packed object 50 includes a header 52.
  • the header 52 contains, for example, information about the position of each object 51 included in the packed object 50 in the packed object 50. The information regarding this position may be, for example, information as to which byte to which each object 51 exists in the packed object 50.
  • the information processing device 10 records the object to be stored on the magnetic tape 30 in units of the packed object 50.
  • the information processing apparatus 10 issues a command for recording instructions and performs a process of transmitting the command to the tape drive 40.
  • the frequency of command issuance processing can be reduced, and the overhead due to command issuance can be suppressed. ..
  • the plurality of objects 51 included in the packed object 50 are recorded together on the magnetic tape 30.
  • the information processing apparatus 10 reads out the object 51 recorded on the magnetic tape 30 in units of the packed object 50.
  • the information processing apparatus 10 extracts only the object 51 to be read out of the objects 51 included in the read packed object 50, and transmits the object 51 to an external device such as a user terminal that has issued the read request.
  • the information processing apparatus 10 When there is a request to transfer an object recorded on a magnetic tape to another magnetic tape, the information processing apparatus 10 reads the object to be migrated from the magnetic tape of the migration source, and the read out object to be migrated is a packed object. Rebuild.
  • the information processing apparatus 10 controls to record the reconstructed packed object on the magnetic tape of the migration destination. Rebuilding a packed object means changing the combination of objects contained in the packed object.
  • the information processing apparatus 10 packs a plurality of objects to be migrated so that a plurality of objects included in the combination are included in the same packed object for a combination that is read out frequently within the same period. Rebuild the object.
  • FIG. 4 is a functional block diagram showing an example of the functional configuration of the information processing apparatus 10 in the case of migrating the object to be migrated recorded on the migration source magnetic tape 30A to the migration destination magnetic tape 30B.
  • the information processing apparatus 10 includes a reading unit 11, an extracting unit 12, a packing unit 13, and a recording unit 14.
  • the CPU 101 executes the information processing program 110, the information processing apparatus 10 functions as a reading unit 11, an extracting unit 12, a packing unit 13, and a recording unit 14.
  • the reading unit 11 controls to read the object to be migrated from the migration source magnetic tape 30A to the tape drive 40 loaded with the migration source magnetic tape 30A.
  • the object to be migrated may be all objects recorded on the magnetic tape 30A of the migration source, or may be some objects.
  • FIG. 5 is a diagram showing an example of the configuration of the packed object recorded on the magnetic tape 30A of the migration source. It is assumed that the packed object 50A including the objects A to H and the packed object 50B including the objects I to P are recorded on the magnetic tape 30A of the migration source. Objects A to P are all objects to be migrated.
  • the reading unit 11 stores the objects A to P to be transferred read from the transfer source magnetic tape 30A in the storage unit 103.
  • the frequency of reading within the same period (hereinafter referred to as simultaneous read frequency) is equal to or higher than the first threshold value. Extract the combinations that are.
  • “within the same period” is not limited to the case where the timings completely match, but also includes the case where the readings are performed within a predetermined period (for example, within 1 minute) which can be regarded as simultaneous.
  • the extraction unit 12 derives the simultaneous read frequency in the objects A to P to be migrated by referring to the read log 120 stored in the storage unit 103.
  • FIG. 6 is a diagram showing an example of the read log 120.
  • the read log 120 is a log recorded in which the read time of the object read from the magnetic tape 30 housed in the tape library 20 and the object ID are associated with each other.
  • the object ID is object identification information such as an object key.
  • the read log 120 is added by the information processing apparatus 10 each time the object is read from the magnetic tape 30.
  • the read log 120 is not limited to the object read from the magnetic tape 30, but may be related to the object read from the storage unit 103 of the information processing apparatus 10.
  • the extraction unit 12 refers to the read log 120 and derives the simultaneous read frequency for each combination of the objects A to P to be migrated.
  • FIG. 7 is a diagram showing an example of the simultaneous read frequency derived for each combination of the plurality of objects A to P to be transferred read from the magnetic tape 30A of the migration source.
  • the extraction unit 12 extracts a combination of objects whose simultaneous read frequency is equal to or higher than the first threshold value among the objects to be transferred read from the transfer source magnetic tape 30A.
  • the extraction unit 12 has a combination of objects whose simultaneous read frequency is, for example, 7 times or more [object A and object F], [object A and object N], [object D and object P], and [object H and object O]. To extract.
  • the packing unit 13 constructs a packed object in which a plurality of objects included in the combination are collected for the combination extracted by the extraction unit 12. .. That is, the packing unit 13 reconstructs the packed objects for the objects A to P to be migrated.
  • FIG. 8 is a diagram showing an example of a packed object reconstructed by the packing unit 13.
  • the packing unit 13 constructs a packed object 50C including objects A, F, and N included in the combination extracted by the extraction unit 12. Further, the packing unit 13 constructs a packed object 50D including the objects D, P, H and O included in the combination extracted by the extraction unit 12. That is, the packing unit 13 reconstructs the packed objects so that a plurality of objects included in the combination whose simultaneous read frequency is equal to or higher than the first threshold value are included in the same packed object. At this time, the packing unit 13 constructs the packed object so that the total value of the number of objects or the data size included in one packed object is equal to or less than a predetermined value.
  • FIG. 8 shows objects A, F and N whose simultaneous read frequency is included in the combination of the first threshold value or more, and objects B, C and E whose simultaneous read frequency is not included in the combination of the first threshold value or more.
  • the packed object 50C including G and I is exemplified, the packed object containing only the objects A, F and N included in the combination whose simultaneous read frequency is equal to or higher than the first threshold value is constructed. It is also good.
  • FIG. 8 illustrates a case where a packed object 50D including a combination of objects D and P whose simultaneous read frequency is the first threshold value and a combination of objects H and O is constructed. You may construct a packed object to include the two combinations in separate packed objects. In this case, a packed object containing only objects D and P, and a packed object containing only objects H and O may be constructed.
  • the recording unit 14 controls the tape drive 40 loaded with the migration destination magnetic tape 30B to record the packed objects 50C and 50D reconstructed by the packing unit 13 on the migration destination magnetic tape 30B.
  • the recording unit 14 transmits the recording instruction command issued for each of the packed objects 50C and 50D to the tape drive 40 loaded with the destination magnetic tape 30B together with the packed objects 50C and 50D.
  • FIG. 9 is a flowchart showing an example of the flow of the transition process executed by the CPU 101 executing the information processing program 110.
  • the information processing program 110 is executed, for example, when a user inputs an execution instruction for migration processing via the input unit 105. It is assumed that the migration source magnetic tape 30A and the migration destination magnetic tape 30B are loaded in the tape drive 40, respectively.
  • step S1 the reading unit 11 controls to read the object to be migrated from the migration source magnetic tape 30A to the tape drive 40 loaded with the migration source magnetic tape 30A.
  • the reading unit 11 stores the read out object to be migrated in the storage unit 103.
  • step S2 the extraction unit 12 extracts a combination of the migration target objects read in step S1 whose frequency (simultaneous read frequency) read within the same period is equal to or higher than the first threshold value.
  • the extraction unit 12 refers to the read log 120 and derives the simultaneous read frequency for each combination of the objects to be migrated.
  • the extraction unit 12 extracts a combination of objects whose derived simultaneous read frequency is equal to or higher than the first threshold value.
  • step S3 the packing unit 13 constructs a packed object in which a plurality of objects included in the combination extracted in step S3 are put together. That is, the packing unit 13 constructs a packed object so that a plurality of objects included in the combination extracted in step S3 are included in the same packed object. Further, the packing unit 13 constructs a packed object so that the total value of the number of objects or the data size included in one packed object is not more than a predetermined value.
  • step S4 the recording unit 14 controls the tape drive 40 loaded with the migration destination magnetic tape 30B to record the packed object constructed in step S3 on the migration destination magnetic tape 30B.
  • the information processing apparatus 10 controls to read out a plurality of objects recorded on the migration source magnetic tape 30A, and among the plurality of read objects, within the same period. For a combination whose read frequency is equal to or higher than the first threshold value, control is performed to construct a packed object in which a plurality of objects included in the combination are put together and record the constructed packed object on the destination magnetic tape 30B. conduct. That is, when the information processing apparatus 10 transfers an object from the transfer source magnetic tape 30A to the transfer destination magnetic tape 30B, a plurality of objects included in the combination whose simultaneous read frequency is equal to or higher than the first threshold value are the same. Rebuild the packed object to be included in the packed object.
  • a plurality of objects included in the packed object are recorded in a cohesive state on the magnetic tape 30. Further, the object recorded on the magnetic tape 30 is read out in units of packed objects. A combination of objects that are read at the same time in the past is likely to be read at the same time in the future. A plurality of objects included in such a combination are reconstructed so as to be included in one packed object and recorded on the migration destination magnetic tape 30B. When reading the objects, the migration destination magnetic tape 30 is recorded. By reading from, there is a possibility that the time required for reading can be shortened as compared with the case of reading from the magnetic tape 30A of the migration source.
  • the information processing apparatus 10 according to the first embodiment described above constructs a packed object in which a plurality of objects included in a combination whose simultaneous read frequency is equal to or higher than the first threshold value are put together.
  • the information processing apparatus 10 according to the second embodiment constructs a packed object in which a plurality of objects specified based on the order regarding the simultaneous read frequency are put together.
  • the extraction unit 12 refers to the read log 120 and derives the simultaneous read frequency for each combination of the objects to be migrated (see FIG. 7).
  • the extraction unit 12 ranks the simultaneous read frequencies derived for each combination of the objects to be migrated in descending order of frequency.
  • FIG. 10 is a diagram showing an example of the result of ranking the simultaneous read frequency.
  • the extraction unit 12 ranks the objects in descending order of frequency of simultaneous reading, for example, combinations from the top 1 to 5 [object H and object O], [object A and object N], [object D and object]. [P], [Object A and Object F], and [Object C and Object J] are extracted. In addition, it is possible to appropriately set how many higher ranks are to be extracted.
  • the packing unit 13 constructs a packed object that is a collection of a plurality of objects included in the combination extracted by the extraction unit 12 among the objects to be migrated read by the reading unit 11.
  • FIG. 11 is a diagram showing an example of a packed object reconstructed according to the ranking illustrated in FIG.
  • the packing unit 13 constructs a packed object 50E including objects A, F, N, C and J included in the combination extracted by the extraction unit 12. Further, the packing unit 13 constructs a packed object 50F including the objects D, P, H and O included in the combination extracted by the extraction unit 12.
  • FIG. 12 is a flowchart showing an example of the flow of the transition process executed by the CPU 101 included in the information processing apparatus 10 according to the second embodiment by executing the information processing program 110.
  • the flowchart shown in FIG. 12 replaces step S2 in the flowchart shown in FIG. 9 according to the first embodiment with step S2A.
  • step S2A of the flowchart shown in FIG. 12 will be described.
  • step S2A the extraction unit 12 extracts a combination of the migration target objects read in step S1 having a higher rank in terms of frequency read out within the same period (simultaneous read frequency). Specifically, the extraction unit 12 refers to the read log 120 and derives the simultaneous read frequency for each combination of the objects to be migrated. The extraction unit 12 ranks the simultaneous read frequencies derived for each combination of the objects to be migrated in descending order of frequency. The extraction unit 12 extracts, for example, combinations from the top 1 to 5 in the order of simultaneous read frequency.
  • the information processing apparatus 10 controls to read out a plurality of objects recorded on the migration source magnetic tape 30A, and is the same among the plurality of read objects.
  • a packed object that collects multiple objects included in the combination is constructed, and the constructed packed object is recorded on the destination magnetic tape 30B. Control to do.
  • the time required for reading the object can be shortened as in the first embodiment.
  • the information processing apparatus 10 constructs an object group in which only a plurality of objects included in the combination are put together for a combination having a simultaneous read frequency higher than the first threshold value and greater than or equal to the second threshold value. Further processing is performed.
  • the extraction unit 12 extracts combinations of the objects to be migrated whose simultaneous read frequency is equal to or higher than the first threshold value, and simultaneously extracts the combinations. Further extracts combinations having a read frequency equal to or higher than the second threshold value.
  • the packing unit 13 constructs a packed object in which only a plurality of objects included in the combination are collected for the combination extracted by the extraction unit 12 and whose simultaneous read frequency is equal to or higher than the second threshold value. Further, the packing unit 13 constructs a packed object in which a plurality of objects included in the combination are grouped together with other objects for a combination in which the simultaneous read frequency is equal to or more than the first threshold value and less than the second threshold value.
  • the "other object” is an object other than the object included in the combination whose simultaneous read frequency is equal to or higher than the first threshold value.
  • FIG. 13 is a diagram showing an example of a packed object reconstructed by the information processing apparatus 10 according to the third embodiment.
  • the packing unit 13 constructs a packed object 50G containing only objects H and O included in a combination in which the simultaneous read frequency is equal to or higher than the second threshold value (for example, 10 times). Further, the packing unit 13 includes objects A, F and N included in a combination in which the simultaneous read frequency is equal to or more than the first threshold value (for example, 7 times) and less than the second threshold value, and other objects B, C, E, G and the like.
  • a packed object 50H including I is constructed. Further, the packing unit 13 constructs a packed object 50I including objects D and P included in a combination in which the simultaneous read frequency is equal to or more than the first threshold value and less than the second threshold value, and other objects J, K, L and M. do.
  • FIG. 14 is a flowchart showing an example of the flow of the transition process executed by the CPU 101 included in the information processing apparatus 10 according to the third embodiment by executing the information processing program 110.
  • step S2 in the flowchart shown in FIG. 9 according to the first embodiment is replaced with steps S2B and S2C
  • step S3 in the flowchart shown in FIG. 9 according to the first embodiment is changed to step S2. It is replaced with S3A and step S3B.
  • steps S2B, S2C, S3A, S3B and S4 of the flowchart shown in FIG. 14 will be described.
  • step S2B the extraction unit 12 extracts a combination of the objects to be migrated read in step S1 whose frequency (simultaneous read frequency) read within the same period is equal to or higher than the first threshold value.
  • the extraction unit 12 refers to the read log 120 and derives the simultaneous read frequency for each combination of the objects to be migrated.
  • the extraction unit 12 extracts a combination of objects whose derived simultaneous read frequency is equal to or higher than the first threshold value.
  • step S2C the extraction unit 12 further extracts from the combinations extracted in step S2B the combinations having a simultaneous read frequency higher than the first threshold value and equal to or higher than the second threshold value.
  • step S3A the packing unit 13 constructs a packed object in which only a plurality of objects included in the combination whose simultaneous read frequency is equal to or higher than the second threshold value extracted in step S2C are put together.
  • step S3B the packing unit 13 constructs a packed object in which a plurality of objects and other objects included in the combination whose simultaneous read frequency is equal to or more than the first threshold value and less than the second threshold value are put together.
  • step S4 the recording unit 14 controls the tape drive 40 loaded with the migration destination magnetic tape 30B to record the packed objects constructed in steps S3A and SB on the migration destination magnetic tape 30B.
  • the recording unit 14 continuously migrates these packed objects. Record on the magnetic tape 30B.
  • the simultaneous read frequency of the plurality of objects read from the migration source magnetic tape 30A is higher than the first threshold value.
  • a packed object is constructed in which only a plurality of objects included in the combination are put together.
  • the effect of suppressing the reading of objects other than the objects to be read included in the packed object is promoted. Is possible. This makes it possible to further shorten the reading time of the object.
  • these packed objects can be continuously recorded on the migration destination magnetic tape 30B. Since these packed objects are recorded together on the destination magnetic tape 30B, it is possible to further shorten the reading time of the objects.
  • the migration destination magnetic tape 30B is different from the migration source magnetic tape 30A
  • the migration destination magnetic tape 30B is the migration source. It can also be applied when it is the same as the magnetic tape 30A of.
  • the packed object may be reconstructed for the object to be migrated read from a certain magnetic tape 30, and then recorded in an empty area of the same magnetic tape 30. Further, after reading the object to be migrated from a certain magnetic tape 30, the object recorded on the magnetic tape 30 is erased, the packed object is reconstructed for the object to be migrated, and the object is recorded again on the magnetic tape 30. You may.
  • the hardware structure of the processing unit that executes various processes such as the reading unit 11, the extracting unit 12, the packing unit 13, and the recording unit 14 is as shown below.
  • Processor can be used.
  • the various processors include a CPU, which is a general-purpose processor that executes software (program) and functions as various processing units, and a processor whose circuit configuration can be changed after manufacturing an FPGA or the like. It includes a dedicated electric circuit, which is a processor having a circuit configuration specially designed for executing a specific process such as a programmable logic device (PLD), an ASIC (Application Specific Integrated Circuit), and the like.
  • PLD programmable logic device
  • ASIC Application Specific Integrated Circuit
  • One processing unit may be composed of one of these various processors, or a combination of two or more processors of the same type or different types (for example, a combination of a plurality of FPGAs or a combination of a CPU and an FPGA). It may be composed of a combination). Further, a plurality of processing units may be configured by one processor.
  • one processor is configured by a combination of one or more CPUs and software, as represented by a computer such as a client and a server.
  • the processor functions as a plurality of processing units.
  • SoC System on Chip
  • the various processing units are configured by using one or more of the above-mentioned various processors as a hardware-like structure.
  • an electric circuit in which circuit elements such as semiconductor elements are combined can be used.
  • the information processing program 60 is provided in a form recorded on a recording medium such as a CD-ROM (Compact Disc Read Only Memory), a DVD-ROM (Digital Versatile Disc Read Only Memory), and a USB (Universal Serial Bus) memory. May be good. Further, the information processing program 60 may be downloaded from an external device via a network.
  • a recording medium such as a CD-ROM (Compact Disc Read Only Memory), a DVD-ROM (Digital Versatile Disc Read Only Memory), and a USB (Universal Serial Bus) memory. May be good.
  • the information processing program 60 may be downloaded from an external device via a network.

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Abstract

L'invention concerne un dispositif de traitement d'informations pourvu d'au moins un processeur. Le processeur réalise une commande pour : extraire une pluralité d'objets enregistrés sur une bande magnétique d'une source de transfert ; construire, parmi la pluralité d'objets qui ont été extraits, un groupe d'objets en groupant des objets inclus dans une combinaison d'objets extraits à une fréquence égale ou supérieure à une première valeur seuil dans la même période ou dans une combinaison d'objets spécifiés sur la base de classements de fréquences auxquelles les objets ont été extraits dans la même période ; et enregistrer le groupe d'objets sur une bande magnétique d'une destination de transfert.
PCT/JP2021/026636 2020-09-08 2021-07-15 Dispositif, procédé et programme de traitement d'informations WO2022054401A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008059438A (ja) * 2006-09-01 2008-03-13 Hitachi Ltd 記憶システム、そのデータ再配置方法、データ再配置プログラム
JP2014191524A (ja) * 2013-03-27 2014-10-06 Hitachi-Lg Data Storage Inc 情報記録再生システム及び情報記録再生方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008059438A (ja) * 2006-09-01 2008-03-13 Hitachi Ltd 記憶システム、そのデータ再配置方法、データ再配置プログラム
JP2014191524A (ja) * 2013-03-27 2014-10-06 Hitachi-Lg Data Storage Inc 情報記録再生システム及び情報記録再生方法

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