WO2022172550A1 - Information processing device, information processing method, and information processing program - Google Patents

Information processing device, information processing method, and information processing program Download PDF

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Publication number
WO2022172550A1
WO2022172550A1 PCT/JP2021/042671 JP2021042671W WO2022172550A1 WO 2022172550 A1 WO2022172550 A1 WO 2022172550A1 JP 2021042671 W JP2021042671 W JP 2021042671W WO 2022172550 A1 WO2022172550 A1 WO 2022172550A1
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Prior art keywords
recording
tape
data
information processing
magnetic tapes
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PCT/JP2021/042671
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French (fr)
Japanese (ja)
Inventor
豊 大石
理貴 近藤
優子 宇野
美咲 大塚
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富士フイルム株式会社
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Priority to JP2022581194A priority Critical patent/JPWO2022172550A1/ja
Publication of WO2022172550A1 publication Critical patent/WO2022172550A1/en

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    • 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
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/675—Guiding containers, e.g. loading, ejecting cassettes
    • G11B15/68—Automatic cassette changing arrangements; automatic tape changing arrangements
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • 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
    • 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
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel

Definitions

  • the present disclosure relates to an information processing device, an information processing method, and an information processing program.
  • Japanese Patent Application Laid-Open No. 2016-115377 discloses a technique of dividing data to be recorded into a plurality of segments and recording the plurality of segments on a plurality of magnetic tapes.
  • Japanese Patent Application Laid-Open No. 2016-018456 discloses a technique for recording a plurality of data in parallel on a plurality of magnetic tapes using a plurality of tape drives.
  • the data can be recorded by loading all the recording magnetic tapes into the tape drives and recording the data to be recorded in parallel on the recording magnetic tapes. recording time can be shortened. As a result, data can be efficiently recorded on the magnetic tape.
  • JP-A-2016-115377 and JP-A-2016-018456 are effective in recording data on magnetic tapes when the number of magnetic tapes as recording destinations is greater than the number of tape drives. not considered.
  • the present disclosure has been made in view of the circumstances described above, and aims to provide an information processing apparatus, an information processing method, and an information processing program capable of efficiently recording data on a magnetic tape. do.
  • An information processing apparatus is an information processing apparatus including at least one processor, and the processor stores a plurality of data associated with magnetic tapes as recording destinations on a plurality of magnetic tapes using a plurality of tape drives. and when the number of magnetic tapes on the recording destination is greater than the number of tape drives that can be used, data recording on the magnetic tape is interrupted at least once, and the interrupted magnetic tape Control is performed so that data recording on a tape is resumed by a tape drive different from the tape drive before interruption.
  • the processor distributes a plurality of data to a plurality of magnetic tapes using a plurality of tape drives so that the total capacity of data recorded on magnetic tapes by each of the plurality of tape drives is leveled. You may control recording on a magnetic tape.
  • the information processing method of the present disclosure performs control for recording a plurality of data associated with recording destination magnetic tapes on a plurality of magnetic tapes using a plurality of tape drives, and If the number of magnetic tapes is greater than the number of available tape drives, suspend data recording on the magnetic tapes at least once, and stop recording data on the suspended magnetic tapes.
  • a processor included in the information processing apparatus executes processing for controlling resuming in a different tape drive.
  • the information processing program of the present disclosure performs control for recording a plurality of data associated with recording destination magnetic tapes on a plurality of magnetic tapes using a plurality of tape drives, and the recording destination If the number of magnetic tapes is greater than the number of available tape drives, suspend data recording on the magnetic tapes at least once, and stop recording data on the suspended magnetic tapes. This is for causing a processor included in the information processing apparatus to execute a process of controlling resumption in a different tape drive.
  • data can be efficiently recorded on a magnetic tape.
  • FIG. 1 is a block diagram showing an example of the configuration of an information processing system; FIG. It is a block diagram which shows an example of the hardware constitutions of an information processing apparatus.
  • 1 is a block diagram showing an example of a functional configuration of an information processing device;
  • FIG. 4 is a diagram showing an example of data to be recorded; It is a figure for demonstrating the data recording process which concerns on a comparative example.
  • FIG. 4 is a diagram for explaining data recording processing according to the embodiment; 4 is a flowchart showing an example of data recording processing;
  • the information processing system 10 includes an information processing device 12 and a tape library 14 .
  • the information processing device 12 include a server computer and the like.
  • the tape library 14 comprises a plurality of slots (not shown) and a plurality of tape drives 18, each slot storing a magnetic tape T as an example of a recording medium.
  • Each tape drive 18 is connected to the information processing device 12 .
  • the tape drive 18 writes data to or reads data from the magnetic tape T under the control of the information processing device 12 .
  • An example of the magnetic tape T is an LTO (Linear Tape-Open) tape.
  • the magnetic tape T to be written or read is loaded from the slot into the predetermined tape drive 18 .
  • the magnetic tape T is unloaded from the tape drive 18 to the slot in which it was originally stored.
  • the information processing device 12 includes a CPU (Central Processing Unit) 20 , a memory 21 as a temporary storage area, and a non-volatile storage section 22 .
  • the information processing device 12 also includes a display 23 such as a liquid crystal display, an input device 24 such as a keyboard and a mouse, a network I/F (InterFace) 25 connected to a network, and an external I/F to which each tape drive 18 is connected.
  • a display 23 such as a liquid crystal display
  • an input device 24 such as a keyboard and a mouse
  • a network I/F (InterFace) 25 connected to a network
  • an external I/F to which each tape drive 18 is connected.
  • Including F26 CPU 20 , memory 21 , storage unit 22 , display 23 , input device 24 , network I/F 25 and external I/F 26 are connected to bus 27 .
  • the storage unit 22 is implemented by a HDD (Hard Disk Drive), SSD (Solid State Drive), flash memory, or the like.
  • An information processing program 30 is stored in the storage unit 22 as a storage medium.
  • the CPU 20 reads out the information processing program 30 from the storage unit 22 , expands it in the memory 21 , and executes the expanded information processing program 30 .
  • the storage unit 22 temporarily stores data transmitted from the user terminal.
  • the information processing device 12 performs control to record data stored in the storage unit 22 on the magnetic tape T at a predetermined timing T1.
  • Examples of the predetermined timing T1 include regular timing, timing when the total size of data exceeds a certain value, timing when the free space of the storage unit 22 becomes equal to or less than a threshold, and the like.
  • the information processing device 12 After recording the data stored in the storage unit 22 on the magnetic tape T, the information processing device 12 deletes the data from the storage unit 22 at a predetermined timing T2.
  • the predetermined timing T2 may be the timing at which the elapsed time since the data is stored in the storage unit 22 exceeds a certain period, the timing at which the frequency of access to the data becomes equal to or less than a threshold value, or the timing when the storage unit 22 is empty. For example, the timing when the capacity becomes equal to or less than the threshold value.
  • the data stored in the storage unit 22 is associated with the magnetic tape T as the recording destination.
  • a magnetic tape T is assigned to each user of the information processing system 10, and the magnetic tape T assigned to the user who sent the data is associated with the data.
  • the magnetic tape T may be associated with the data according to the type of data such as document data and image data.
  • the magnetic tape T may be associated with the data every predetermined period, such as January data being associated with the magnetic tape T for January.
  • the information processing apparatus 12 stores each magnetic tape T in the tape drive. 18, and a plurality of data can be recorded in parallel on the magnetic tapes T associated with each other. This shortens the data recording time.
  • the information processing apparatus 12 improves efficiency when the number of magnetic tapes T as recording destinations associated with a plurality of data stored in the storage unit 22 is greater than the number of available tape drives 18 . It has a function to record data on the magnetic tape T in a practical manner.
  • the tape drive 18 that can be used here means a tape drive 18 that can be used for recording data on the magnetic tape T at the timing of recording the data. For example, not only when the number of magnetic tapes T as recording destinations is greater than the number of tape drives 18 provided in the tape library 14, but also when the number of magnetic tapes T as recording destinations is greater than the number of available tape drives 18 in the following cases: It can be more than the number.
  • the number of magnetic tapes T as recording destinations is equal to or less than the number of tape drives 18 provided in the tape library 14, if some of the tape drives 18 are occupied for purposes other than data recording such as read-only , the number of magnetic tapes T to be recorded may be greater than the number of tape drives 18 available.
  • the information processing device 12 includes an acquisition section 40 and a control section 42 .
  • the CPU 20 functions as an acquisition unit 40 and a control unit 42 by executing the information processing program 30 .
  • the acquisition unit 40 acquires a plurality of data stored in the storage unit 22.
  • the control unit 42 controls recording of the plurality of data acquired by the acquisition unit 40 on the plurality of magnetic tapes T using the plurality of tape drives 18 .
  • the control unit 42 interrupts data recording on the magnetic tapes T at least once, and control to resume data recording to a tape drive 18 different from the tape drive before interruption.
  • the control unit 42 distributes the plurality of data acquired by the acquisition unit 40 to the plurality of tapes so that the total capacity of the data recorded on the magnetic tape T by each of the plurality of tape drives 18 is leveled. Control of recording on a plurality of magnetic tapes T using the drive 18 is performed.
  • FIG. 4 there are four data groups in which four magnetic tapes T are associated one-to-one.
  • the number of data is four.
  • the time required for recording each of these data on the magnetic tape T is the same.
  • the number of usable tape drives 18 is three.
  • FIG. 5 for example, three tape drives 18 are used to record data on each of three magnetic tapes T in parallel, and after the data recording on the magnetic tapes T is completed, the magnetic tapes T are recorded. shall be replaced.
  • black rectangles represent replacement of the magnetic tapes T.
  • the recording of three pieces of data on the magnetic tape T is completed first, and the magnetic tape T is replaced with the tape drive 18 . After replacing the magnetic tape T, four data are recorded on the magnetic tape T.
  • FIG. Therefore, in the example of FIG. 5, the total time required for recording seven pieces of data on the magnetic tape T and the time required for one exchange of the magnetic tape T from the start to the end of data recording. It will take.
  • data is recorded in parallel on each of three magnetic tapes T using three tape drives 18, and data interrupts recording in the middle. Then, the interrupted data recording on the magnetic tape T is resumed with a tape drive 18 different from the tape drive 18 before the interruption.
  • a plurality of tape drives 18 are used to record a plurality of data on a plurality of magnetic tapes T so that the total capacity of the data recorded on the magnetic tapes T by each of the plurality of tape drives 18 is leveled. to record.
  • the control unit 42 derives the data recording order as shown in FIG. 6 as follows. Specifically, the control unit 42 calculates the total capacity of the data recorded on the magnetic tape T by each tape drive 18 by dividing the total size of all data to be recorded by the number of tape drives 18. do. Then, the control unit 42 sets the total capacity calculated for each tape drive 18 as the capacity of the knapsack, and solves the knapsack problem expressed as an integer programming problem as to how to arrange and pack each data into each knapsack. A data recording order in the tape drive 18 is derived. At this time, the control unit 42 minimizes the number of exchanges of the magnetic tapes T in each tape drive 18 . Known algorithms such as dynamic programming or branch and bound can be used for this derivation.
  • the data recording process shown in FIG. 7 is executed by the CPU 20 executing the information processing program 30 .
  • the data recording process shown in FIG. 7 is executed, for example, at the timing T1 described above.
  • step S10 in FIG. 7 the acquisition unit 40 acquires a plurality of data stored in the storage unit 22.
  • the control unit 42 performs control to record the plurality of data acquired in step S ⁇ b>10 onto the plurality of magnetic tapes T using the plurality of tape drives 18 , as described above.
  • the data recording process ends.
  • data can be recorded on the magnetic tape T efficiently.
  • the various processors include, in addition to the CPU, which is a general-purpose processor that executes software (programs) and functions as various processing units, circuits such as FPGAs (Field Programmable Gate Arrays) Programmable Logic Device (PLD) which is a processor whose configuration can be changed, ASIC (Application Specific Integrated Circuit) etc. Circuits, etc. are included.
  • the CPU which is a general-purpose processor that executes software (programs) and functions as various processing units
  • circuits such as FPGAs (Field Programmable Gate Arrays) Programmable Logic Device (PLD) which is a processor whose configuration can be changed, ASIC (Application Specific Integrated Circuit) etc. Circuits, etc. are included.
  • 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 multiple FPGAs, a combination of a CPU and an FPGA). combination). Also, a plurality of processing units may be configured by one processor.
  • a single processor is configured by combining one or more CPUs and software.
  • a processor functions as multiple processing units.
  • SoC System on Chip
  • the various processing units are configured using one or more of the above various processors as a hardware structure.
  • an electric circuit combining circuit elements such as semiconductor elements can be used.
  • the information processing program 30 has been pre-stored (installed) in the storage unit 22, but the present invention is not limited to this.
  • the information processing program 30 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. good too. Further, the information processing program 30 may be downloaded from an external device via a network.

Abstract

This information processing device, when performing control for using a plurality of tape drives and recording, on a plurality of magnetic tapes, a plurality of data items to which recording destination magnetic tapes are associated and when the number of recording destination magnetic tapes is greater than the number of usable tape drives, performs control for at least once pausing the recording of data to magnetic tapes and restarting the paused recording of the data to the magnetic tapes with a tape drive different from the tape drive before the pausing.

Description

情報処理装置、情報処理方法、及び情報処理プログラムInformation processing device, information processing method, and information processing program
　本開示は、情報処理装置、情報処理方法、及び情報処理プログラムに関する。 The present disclosure relates to an information processing device, an information processing method, and an information processing program.
　特開２０１６－１１５３７７号公報には、記録対象のデータを複数のセグメントに分割し、その複数のセグメントを複数の磁気テープに記録する技術が開示されている。 Japanese Patent Application Laid-Open No. 2016-115377 discloses a technique of dividing data to be recorded into a plurality of segments and recording the plurality of segments on a plurality of magnetic tapes.
　特開２０１６－０１８４５６号公報には、複数のテープドライブを用いて、複数のデータを複数の磁気テープに並列に記録する技術が開示されている。 Japanese Patent Application Laid-Open No. 2016-018456 discloses a technique for recording a plurality of data in parallel on a plurality of magnetic tapes using a plurality of tape drives.
　記録先の磁気テープの数がテープドライブの数以下である場合、記録先の磁気テープ全てをテープドライブに装填し、かつ記録対象のデータを記録先の磁気テープに並列に記録することによって、データの記録時間を短縮することができる。これにより、磁気テープへのデータの記録を効率的に行うことができる。 If the number of recording magnetic tapes is less than the number of tape drives, the data can be recorded by loading all the recording magnetic tapes into the tape drives and recording the data to be recorded in parallel on the recording magnetic tapes. recording time can be shortened. As a result, data can be efficiently recorded on the magnetic tape.
　しかしながら、記録先の磁気テープの数がテープドライブの数よりも多い場合、記録先の磁気テープ全てに対して並列にデータを記録することができないため、磁気テープへのデータの記録を効率的に行うことができない場合がある。特開２０１６－１１５３７７号公報及び特開２０１６－０１８４５６号公報に記載の技術は、記録先の磁気テープの数がテープドライブの数よりも多い場合における磁気テープへの効率的なデータの記録については考慮されていない。 However, when the number of magnetic tapes as recording destinations is greater than the number of tape drives, data cannot be recorded in parallel on all the magnetic tapes as recording destinations. may not be possible. The techniques described in JP-A-2016-115377 and JP-A-2016-018456 are effective in recording data on magnetic tapes when the number of magnetic tapes as recording destinations is greater than the number of tape drives. not considered.
　本開示は、以上の事情を鑑みてなされたものであり、磁気テープへのデータの記録を効率的に行うことができる情報処理装置、情報処理方法、及び情報処理プログラムを提供することを目的とする。 The present disclosure has been made in view of the circumstances described above, and aims to provide an information processing apparatus, an information processing method, and an information processing program capable of efficiently recording data on a magnetic tape. do.
　本開示の情報処理装置は、少なくとも一つのプロセッサを備える情報処理装置であって、プロセッサは、記録先の磁気テープが対応付けられた複数のデータを、複数のテープドライブを用いて複数の磁気テープに記録する制御を行う場合であって、かつ記録先の磁気テープの数が使用可能なテープドライブの数よりも多い場合、少なくとも１回は磁気テープへのデータの記録を中断し、中断した磁気テープへのデータの記録を中断前のテープドライブとは異なるテープドライブで再開する制御を行う。 An information processing apparatus according to the present disclosure is an information processing apparatus including at least one processor, and the processor stores a plurality of data associated with magnetic tapes as recording destinations on a plurality of magnetic tapes using a plurality of tape drives. and when the number of magnetic tapes on the recording destination is greater than the number of tape drives that can be used, data recording on the magnetic tape is interrupted at least once, and the interrupted magnetic tape Control is performed so that data recording on a tape is resumed by a tape drive different from the tape drive before interruption.
　なお、本開示の情報処理装置は、プロセッサが、複数のテープドライブそれぞれが磁気テープに記録するデータの総容量が平準化されるように、複数のデータを、複数のテープドライブを用いて複数の磁気テープに記録する制御を行ってもよい。 In the information processing apparatus of the present disclosure, the processor distributes a plurality of data to a plurality of magnetic tapes using a plurality of tape drives so that the total capacity of data recorded on magnetic tapes by each of the plurality of tape drives is leveled. You may control recording on a magnetic tape.
　また、本開示の情報処理方法は、記録先の磁気テープが対応付けられた複数のデータを、複数のテープドライブを用いて複数の磁気テープに記録する制御を行う場合であって、かつ記録先の磁気テープの数が使用可能なテープドライブの数よりも多い場合、少なくとも１回は磁気テープへのデータの記録を中断し、中断した磁気テープへのデータの記録を中断前のテープドライブとは異なるテープドライブで再開する制御を行う処理を情報処理装置が備えるプロセッサが実行するものである。 Further, the information processing method of the present disclosure performs control for recording a plurality of data associated with recording destination magnetic tapes on a plurality of magnetic tapes using a plurality of tape drives, and If the number of magnetic tapes is greater than the number of available tape drives, suspend data recording on the magnetic tapes at least once, and stop recording data on the suspended magnetic tapes. A processor included in the information processing apparatus executes processing for controlling resuming in a different tape drive.
　また、本開示の情報処理プログラムは、記録先の磁気テープが対応付けられた複数のデータを、複数のテープドライブを用いて複数の磁気テープに記録する制御を行う場合であって、かつ記録先の磁気テープの数が使用可能なテープドライブの数よりも多い場合、少なくとも１回は磁気テープへのデータの記録を中断し、中断した磁気テープへのデータの記録を中断前のテープドライブとは異なるテープドライブで再開する制御を行う処理を情報処理装置が備えるプロセッサに実行させるためのものである。 Further, the information processing program of the present disclosure performs control for recording a plurality of data associated with recording destination magnetic tapes on a plurality of magnetic tapes using a plurality of tape drives, and the recording destination If the number of magnetic tapes is greater than the number of available tape drives, suspend data recording on the magnetic tapes at least once, and stop recording data on the suspended magnetic tapes. This is for causing a processor included in the information processing apparatus to execute a process of controlling resumption in a different tape drive.
　本開示によれば、磁気テープへのデータの記録を効率的に行うことができる。 According to the present disclosure, data can be efficiently recorded on a magnetic tape.
情報処理システムの構成の一例を示すブロック図である。1 is a block diagram showing an example of the configuration of an information processing system; FIG. 情報処理装置のハードウェア構成の一例を示すブロック図である。It is a block diagram which shows an example of the hardware constitutions of an information processing apparatus. 情報処理装置の機能的な構成の一例を示すブロック図である。1 is a block diagram showing an example of a functional configuration of an information processing device; FIG. 記録対象のデータの一例を示す図である。FIG. 4 is a diagram showing an example of data to be recorded; 比較例に係るデータ記録処理を説明するための図である。It is a figure for demonstrating the data recording process which concerns on a comparative example. 実施形態に係るデータ記録処理を説明するための図である。FIG. 4 is a diagram for explaining data recording processing according to the embodiment; データ記録処理の一例を示すフローチャートである。4 is a flowchart showing an example of data recording processing;
　以下、図面を参照して、本開示の技術を実施するための形態例を詳細に説明する。 Embodiments for implementing the technology of the present disclosure will be described in detail below with reference to the drawings.
　まず、図１を参照して、本実施形態に係る情報処理システム１０の構成を説明する。図１に示すように、情報処理システム１０は、情報処理装置１２及びテープライブラリ１４を含む。情報処理装置１２の例としては、サーバコンピュータ等が挙げられる。 First, the configuration of an information processing system 10 according to the present embodiment will be described with reference to FIG. As shown in FIG. 1, the information processing system 10 includes an information processing device 12 and a tape library 14 . Examples of the information processing device 12 include a server computer and the like.
　テープライブラリ１４は、複数のスロット（図示省略）及び複数のテープドライブ１８を備え、各スロットには記録媒体の一例としての磁気テープＴが格納される。各テープドライブ１８は、情報処理装置１２に接続される。テープドライブ１８は、情報処理装置１２による制御によって、磁気テープＴに対するデータの書き込み又は読み取りを行う。磁気テープＴの例としては、ＬＴＯ（Linear Tape-Open）テープが挙げられる。 The tape library 14 comprises a plurality of slots (not shown) and a plurality of tape drives 18, each slot storing a magnetic tape T as an example of a recording medium. Each tape drive 18 is connected to the information processing device 12 . The tape drive 18 writes data to or reads data from the magnetic tape T under the control of the information processing device 12 . An example of the magnetic tape T is an LTO (Linear Tape-Open) tape.
　情報処理装置１２により磁気テープＴに対するデータの書き込み又は読み取りを行う場合、書き込み又は読み取り対象の磁気テープＴがスロットから所定のテープドライブ１８にロードされる。テープドライブ１８にロードされた磁気テープＴに対するデータの書き込み又は読み取りが完了すると、磁気テープＴは、テープドライブ１８から元々格納されていたスロットにアンロードされる。 When the information processing device 12 writes data to or reads data from the magnetic tape T, the magnetic tape T to be written or read is loaded from the slot into the predetermined tape drive 18 . After data has been written or read from the magnetic tape T loaded in the tape drive 18, the magnetic tape T is unloaded from the tape drive 18 to the slot in which it was originally stored.
　次に、図２を参照して、本実施形態に係る情報処理装置１２のハードウェア構成を説明する。図２に示すように、情報処理装置１２は、ＣＰＵ（Central Processing Unit）２０、一時記憶領域としてのメモリ２１、及び不揮発性の記憶部２２を含む。また、情報処理装置１２は、液晶ディスプレイ等のディスプレイ２３、キーボードとマウス等の入力装置２４、ネットワークに接続されるネットワークＩ／Ｆ（InterFace）２５、及び各テープドライブ１８が接続される外部Ｉ／Ｆ２６を含む。ＣＰＵ２０、メモリ２１、記憶部２２、ディスプレイ２３、入力装置２４、ネットワークＩ／Ｆ２５、及び外部Ｉ／Ｆ２６は、バス２７に接続される。 Next, the hardware configuration of the information processing device 12 according to this embodiment will be described with reference to FIG. As shown in FIG. 2 , the information processing device 12 includes a CPU (Central Processing Unit) 20 , a memory 21 as a temporary storage area, and a non-volatile storage section 22 . The information processing device 12 also includes a display 23 such as a liquid crystal display, an input device 24 such as a keyboard and a mouse, a network I/F (InterFace) 25 connected to a network, and an external I/F to which each tape drive 18 is connected. Including F26. CPU 20 , memory 21 , storage unit 22 , display 23 , input device 24 , network I/F 25 and external I/F 26 are connected to bus 27 .
　記憶部２２は、ＨＤＤ（Hard Disk Drive）、ＳＳＤ（Solid State Drive）、又はフラッシュメモリ等によって実現される。記憶媒体としての記憶部２２には、情報処理プログラム３０が記憶される。ＣＰＵ２０は、記憶部２２から情報処理プログラム３０を読み出してからメモリ２１に展開し、展開した情報処理プログラム３０を実行する。 The storage unit 22 is implemented by a HDD (Hard Disk Drive), SSD (Solid State Drive), flash memory, or the like. An information processing program 30 is stored in the storage unit 22 as a storage medium. The CPU 20 reads out the information processing program 30 from the storage unit 22 , expands it in the memory 21 , and executes the expanded information processing program 30 .
　また、記憶部２２には、ユーザ端末から送信されたデータが一時的に記憶される。情報処理装置１２は、予め定められたタイミングＴ１で、記憶部２２に記憶されたデータを磁気テープＴに記録する制御を行う。この予め定められたタイミングＴ１としては、例えば、定期的なタイミング、データの総サイズが一定値を超えたタイミング、又は記憶部２２の空き容量が閾値以下となったタイミング等が挙げられる。 In addition, the storage unit 22 temporarily stores data transmitted from the user terminal. The information processing device 12 performs control to record data stored in the storage unit 22 on the magnetic tape T at a predetermined timing T1. Examples of the predetermined timing T1 include regular timing, timing when the total size of data exceeds a certain value, timing when the free space of the storage unit 22 becomes equal to or less than a threshold, and the like.
　また、情報処理装置１２は、記憶部２２に記憶されたデータを磁気テープＴに記録した後、予め定められたタイミングＴ２で、そのデータを記憶部２２から削除する。この予め定められたタイミングＴ２としては、データが記憶部２２に記憶されてからの経過期間が一定期間を超えたタイミング、データへのアクセス頻度が閾値以下となったタイミング、又は記憶部２２の空き容量が閾値以下となったタイミング等が挙げられる。 After recording the data stored in the storage unit 22 on the magnetic tape T, the information processing device 12 deletes the data from the storage unit 22 at a predetermined timing T2. The predetermined timing T2 may be the timing at which the elapsed time since the data is stored in the storage unit 22 exceeds a certain period, the timing at which the frequency of access to the data becomes equal to or less than a threshold value, or the timing when the storage unit 22 is empty. For example, the timing when the capacity becomes equal to or less than the threshold value.
　記憶部２２に記憶されるデータには、記録先の磁気テープＴが対応付けられる。例えば、情報処理システム１０のユーザ毎に磁気テープＴが割り当てられており、データの送信元のユーザに割り当てられた磁気テープＴがそのデータに対応付けられる。また、例えば、文書データ及び画像データ等のデータの種類に応じて、データに磁気テープＴが対応付けられてもよい。また、例えば、１月のデータは１月用の磁気テープＴに対応付ける等、所定期間毎に磁気テープＴがデータに対応付けられてもよい。 The data stored in the storage unit 22 is associated with the magnetic tape T as the recording destination. For example, a magnetic tape T is assigned to each user of the information processing system 10, and the magnetic tape T assigned to the user who sent the data is associated with the data. Further, for example, the magnetic tape T may be associated with the data according to the type of data such as document data and image data. Further, for example, the magnetic tape T may be associated with the data every predetermined period, such as January data being associated with the magnetic tape T for January.
　情報処理装置１２は、記憶部２２に記憶された複数のデータに対応付けられた記録先の磁気テープＴの数が使用可能なテープドライブ１８の数以下の場合は、各磁気テープＴをテープドライブ１８に装填し、複数のデータをそれぞれ対応付けられた磁気テープＴに並列に記録することができる。これにより、データの記録時間が短縮される。 When the number of recording destination magnetic tapes T associated with the plurality of data stored in the storage unit 22 is equal to or less than the number of available tape drives 18, the information processing apparatus 12 stores each magnetic tape T in the tape drive. 18, and a plurality of data can be recorded in parallel on the magnetic tapes T associated with each other. This shortens the data recording time.
　本実施形態に係る情報処理装置１２は、記憶部２２に記憶された複数のデータに対応付けられた記録先の磁気テープＴの数が使用可能なテープドライブ１８の数よりも多い場合に、効率的にデータを磁気テープＴに記録するための機能を有する。ここでいう使用可能なテープドライブ１８とは、データを磁気テープＴに記録するタイミングで、そのデータの記録に使用可能なテープドライブ１８を意味する。例えば、記録先の磁気テープＴの数が、テープライブラリ１４が備えるテープドライブ１８の数よりも多い場合だけではなく、以下の場合も記録先の磁気テープＴの数が使用可能なテープドライブ１８の数よりも多くなり得る。例えば、記録先の磁気テープＴの数が、テープライブラリ１４が備えるテープドライブ１８の数以下の場合でも、一部のテープドライブ１８が読み取り専用等のデータの記録以外の目的で占有される場合は、記録先の磁気テープＴの数が使用可能なテープドライブ１８の数よりも多くなり得る。 The information processing apparatus 12 according to the present embodiment improves efficiency when the number of magnetic tapes T as recording destinations associated with a plurality of data stored in the storage unit 22 is greater than the number of available tape drives 18 . It has a function to record data on the magnetic tape T in a practical manner. The tape drive 18 that can be used here means a tape drive 18 that can be used for recording data on the magnetic tape T at the timing of recording the data. For example, not only when the number of magnetic tapes T as recording destinations is greater than the number of tape drives 18 provided in the tape library 14, but also when the number of magnetic tapes T as recording destinations is greater than the number of available tape drives 18 in the following cases: It can be more than the number. For example, even if the number of magnetic tapes T as recording destinations is equal to or less than the number of tape drives 18 provided in the tape library 14, if some of the tape drives 18 are occupied for purposes other than data recording such as read-only , the number of magnetic tapes T to be recorded may be greater than the number of tape drives 18 available.
　次に、図３を参照して、本実施形態に係る情報処理装置１２の機能的な構成について説明する。図３に示すように、情報処理装置１２は、取得部４０及び制御部４２を含む。ＣＰＵ２０が情報処理プログラム３０を実行することにより、取得部４０及び制御部４２として機能する。 Next, with reference to FIG. 3, the functional configuration of the information processing device 12 according to this embodiment will be described. As shown in FIG. 3 , the information processing device 12 includes an acquisition section 40 and a control section 42 . The CPU 20 functions as an acquisition unit 40 and a control unit 42 by executing the information processing program 30 .
　取得部４０は、記憶部２２に記憶された複数のデータを取得する。制御部４２は、取得部４０により取得された複数のデータを、複数のテープドライブ１８を用いて複数の磁気テープＴに記録する制御を行う。この際、制御部４２は、記録先の磁気テープＴの数が使用可能なテープドライブ１８の数よりも多い場合、少なくとも１回は磁気テープＴへのデータの記録を中断し、中断した磁気テープへのデータの記録を中断前のテープドライブとは異なるテープドライブ１８で再開する制御を行う。また、この際、制御部４２は、複数のテープドライブ１８それぞれが磁気テープＴに記録するデータの総容量が平準化されるように、取得部４０により取得された複数のデータを、複数のテープドライブ１８を用いて複数の磁気テープＴに記録する制御を行う。 The acquisition unit 40 acquires a plurality of data stored in the storage unit 22. The control unit 42 controls recording of the plurality of data acquired by the acquisition unit 40 on the plurality of magnetic tapes T using the plurality of tape drives 18 . At this time, if the number of magnetic tapes T as recording destinations is greater than the number of usable tape drives 18, the control unit 42 interrupts data recording on the magnetic tapes T at least once, and control to resume data recording to a tape drive 18 different from the tape drive before interruption. At this time, the control unit 42 distributes the plurality of data acquired by the acquisition unit 40 to the plurality of tapes so that the total capacity of the data recorded on the magnetic tape T by each of the plurality of tape drives 18 is leveled. Control of recording on a plurality of magnetic tapes T using the drive 18 is performed.
　図４～図６を参照して、この制御の具体例を説明する。ここでは、図４に示すように、４本の磁気テープＴが１対１で対応付けられた４つのデータ群があり、１つのデータ群はデータの個数が３個であり、３つのデータ群はデータの個数が４個である例を説明する。また、説明を簡単にするために、これらの各データを磁気テープＴに記録する際の所要時間は同じであるものとする。また、ここでは使用可能なテープドライブ１８の数が３台であるものとする。 A specific example of this control will be described with reference to FIGS. Here, as shown in FIG. 4, there are four data groups in which four magnetic tapes T are associated one-to-one. will explain an example in which the number of data is four. In order to simplify the explanation, it is assumed that the time required for recording each of these data on the magnetic tape T is the same. Also, it is assumed here that the number of usable tape drives 18 is three.
　図５に示すように、例えば、３台のテープドライブ１８を用いて３本の磁気テープＴそれぞれにデータを並列に記録し、かつ磁気テープＴへのデータの記録を完了した後に磁気テープＴを入れ替えるものとする。図５及び図６では、黒く塗りつぶされた矩形が、磁気テープＴの入れ替えを表している。 As shown in FIG. 5, for example, three tape drives 18 are used to record data on each of three magnetic tapes T in parallel, and after the data recording on the magnetic tapes T is completed, the magnetic tapes T are recorded. shall be replaced. In FIGS. 5 and 6, black rectangles represent replacement of the magnetic tapes T. In FIGS.
　図５の例では、最初に３つのデータの磁気テープＴへの記録が完了し、テープドライブ１８への磁気テープＴの入れ替えが行われる。磁気テープＴの入れ替えの後、４つのデータが磁気テープＴへ記録される。従って、図５の例では、データの記録開始から終了までに、７個のデータを磁気テープＴに記録する分の所要時間と１回の磁気テープＴの入れ替えの所要時間とを合計した時間がかかることになる。 In the example of FIG. 5, the recording of three pieces of data on the magnetic tape T is completed first, and the magnetic tape T is replaced with the tape drive 18 . After replacing the magnetic tape T, four data are recorded on the magnetic tape T. FIG. Therefore, in the example of FIG. 5, the total time required for recording seven pieces of data on the magnetic tape T and the time required for one exchange of the magnetic tape T from the start to the end of data recording. It will take.
　これに対し、本実施形態では、図６に示すように、３台のテープドライブ１８を用いて３本の磁気テープＴそれぞれにデータを並列に記録し、かつ２本の磁気テープＴでは、データの記録を途中で中断する。そして、中断した磁気テープＴへのデータの記録を中断前のテープドライブ１８とは異なるテープドライブ１８で再開する。本実施形態では、このように複数のテープドライブ１８それぞれが磁気テープＴに記録するデータの総容量が平準化されるように、複数のデータを複数のテープドライブ１８を用いて複数の磁気テープＴに記録する。 On the other hand, in this embodiment, as shown in FIG. 6, data is recorded in parallel on each of three magnetic tapes T using three tape drives 18, and data interrupts recording in the middle. Then, the interrupted data recording on the magnetic tape T is resumed with a tape drive 18 different from the tape drive 18 before the interruption. In this embodiment, a plurality of tape drives 18 are used to record a plurality of data on a plurality of magnetic tapes T so that the total capacity of the data recorded on the magnetic tapes T by each of the plurality of tape drives 18 is leveled. to record.
　図６の例では、データの記録開始から終了まで、５個のデータを磁気テープＴに記録する分の所要時間と１回の磁気テープＴの入れ替えの所要時間とを合計した時間がかかることになる。すなわち、図６の例では、「Ｄｒｉｖｅ２」及び「Ｄｒｉｖｅ３」は、データの記録開始から終了までの所要時間が図５の例よりも長くなるが、データの記録処理全体の所要時間は、２個のデータを磁気テープＴに記録する分の所要時間だけ図５の例よりも短くなる。 In the example of FIG. 6, it takes the sum of the time required to record five pieces of data on the magnetic tape T and the time required to replace the magnetic tape T once, from the start to the end of data recording. Become. That is, in the example of FIG. 6, "Drive2" and "Drive3" require a longer time from start to end of data recording than in the example of FIG. 5 is shorter than the example shown in FIG.
　図６に示したようなデータの記録順を、制御部４２は、以下に示すように導出する。具体的には、制御部４２は、記録対象の全てのデータのサイズの合計値をテープドライブ１８の数で除算することによって、各テープドライブ１８が磁気テープＴに記録するデータの総容量を算出する。そして、制御部４２は、各テープドライブ１８について算出した総容量をナップサックの容量とし、かつ各ナップサックへ各データをどのように並べて詰めるかを整数計画問題として表したナップサック問題を解くことによって、各テープドライブ１８でのデータの記録順を導出する。この際、制御部４２は、各テープドライブ１８での磁気テープＴの入れ替え回数が最小となるようにする。この導出には、動的計画法又は分枝限定法等の公知のアルゴリズムを用いることができる。 The control unit 42 derives the data recording order as shown in FIG. 6 as follows. Specifically, the control unit 42 calculates the total capacity of the data recorded on the magnetic tape T by each tape drive 18 by dividing the total size of all data to be recorded by the number of tape drives 18. do. Then, the control unit 42 sets the total capacity calculated for each tape drive 18 as the capacity of the knapsack, and solves the knapsack problem expressed as an integer programming problem as to how to arrange and pack each data into each knapsack. A data recording order in the tape drive 18 is derived. At this time, the control unit 42 minimizes the number of exchanges of the magnetic tapes T in each tape drive 18 . Known algorithms such as dynamic programming or branch and bound can be used for this derivation.
　次に、図７を参照して、本実施形態に係る情報処理装置１２の作用を説明する。ＣＰＵ２０が情報処理プログラム３０を実行することによって、図７に示すデータ記録処理が実行される。図７に示すデータ記録処理は、例えば、前述したタイミングＴ１に実行される。 Next, the operation of the information processing device 12 according to this embodiment will be described with reference to FIG. The data recording process shown in FIG. 7 is executed by the CPU 20 executing the information processing program 30 . The data recording process shown in FIG. 7 is executed, for example, at the timing T1 described above.
　図７のステップＳ１０で、取得部４０は、記憶部２２に記憶された複数のデータを取得する。ステップＳ１２で、制御部４２は、前述したように、ステップＳ１０で取得された複数のデータを、複数のテープドライブ１８を用いて複数の磁気テープＴに記録する制御を行う。ステップＳ１２の処理が終了すると、データ記録処理が終了する。 At step S10 in FIG. 7, the acquisition unit 40 acquires a plurality of data stored in the storage unit 22. In step S<b>12 , the control unit 42 performs control to record the plurality of data acquired in step S<b>10 onto the plurality of magnetic tapes T using the plurality of tape drives 18 , as described above. When the process of step S12 ends, the data recording process ends.
　以上説明したように、本実施形態によれば、磁気テープＴへのデータの記録を効率的に行うことができる。 As described above, according to this embodiment, data can be recorded on the magnetic tape T efficiently.
　なお、上記実施形態において、例えば、取得部４０及び制御部４２といった各種の処理を実行する処理部（processing unit）のハードウェア的な構造としては、次に示す各種のプロセッサ（processor）を用いることができる。上記各種のプロセッサには、前述したように、ソフトウェア（プログラム）を実行して各種の処理部として機能する汎用的なプロセッサであるＣＰＵに加えて、ＦＰＧＡ（Field Programmable Gate Array）等の製造後に回路構成を変更可能なプロセッサであるプログラマブルロジックデバイス（Programmable Logic Device：PLD）、ＡＳＩＣ（Application Specific Integrated Circuit）等の特定の処理を実行させるために専用に設計された回路構成を有するプロセッサである専用電気回路等が含まれる。 In the above embodiment, for example, as the hardware structure of the processing unit that executes various processes such as the acquisition unit 40 and the control unit 42, the following various processors can be used. can be done. As described above, the various processors include, in addition to the CPU, which is a general-purpose processor that executes software (programs) and functions as various processing units, circuits such as FPGAs (Field Programmable Gate Arrays) Programmable Logic Device (PLD) which is a processor whose configuration can be changed, ASIC (Application Specific Integrated Circuit) etc. Circuits, etc. are included.
　１つの処理部は、これらの各種のプロセッサのうちの１つで構成されてもよいし、同種又は異種の２つ以上のプロセッサの組み合わせ（例えば、複数のＦＰＧＡの組み合わせや、ＣＰＵとＦＰＧＡとの組み合わせ）で構成されてもよい。また、複数の処理部を１つのプロセッサで構成してもよい。 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 multiple FPGAs, a combination of a CPU and an FPGA). combination). Also, a plurality of processing units may be configured by one processor.
　複数の処理部を１つのプロセッサで構成する例としては、第１に、クライアント及びサーバ等のコンピュータに代表されるように、１つ以上のＣＰＵとソフトウェアの組み合わせで１つのプロセッサを構成し、このプロセッサが複数の処理部として機能する形態がある。第２に、システムオンチップ（System on Chip：SoC）等に代表されるように、複数の処理部を含むシステム全体の機能を１つのＩＣ（Integrated Circuit）チップで実現するプロセッサを使用する形態がある。このように、各種の処理部は、ハードウェア的な構造として、上記各種のプロセッサの１つ以上を用いて構成される。 As an example of configuring a plurality of processing units with a single processor, first, as represented by computers such as clients and servers, a single processor is configured by combining one or more CPUs and software. There is a form in which a processor functions as multiple processing units. Second, as typified by System on Chip (SoC), etc., there is a form of using a processor that realizes the functions of the entire system including multiple processing units with a single IC (Integrated Circuit) chip. be. In this way, the various processing units are configured using one or more of the above various processors as a hardware structure.
　更に、これらの各種のプロセッサのハードウェア的な構造としては、より具体的には、半導体素子などの回路素子を組み合わせた電気回路（circuitry）を用いることができる。 Furthermore, as the hardware structure of these various processors, more specifically, an electric circuit combining circuit elements such as semiconductor elements can be used.
　また、上記実施形態では、情報処理プログラム３０が記憶部２２に予め記憶（インストール）されている態様を説明したが、これに限定されない。情報処理プログラム３０は、ＣＤ－ＲＯＭ（Compact Disc Read Only Memory）、ＤＶＤ－ＲＯＭ（Digital Versatile Disc Read Only Memory）、及びＵＳＢ（Universal Serial Bus）メモリ等の記録媒体に記録された形態で提供されてもよい。また、情報処理プログラム３０は、ネットワークを介して外部装置からダウンロードされる形態としてもよい。 Also, in the above embodiment, the information processing program 30 has been pre-stored (installed) in the storage unit 22, but the present invention is not limited to this. The information processing program 30 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. good too. Further, the information processing program 30 may be downloaded from an external device via a network.
　２０２１年２月１５日に出願された日本国特許出願２０２１－０２１９６０号の開示は、その全体が参照により本明細書に取り込まれる。また、本明細書に記載された全ての文献、特許出願、及び技術規格は、個々の文献、特許出願、及び技術規格が参照により取り込まれることが具体的かつ個々に記された場合と同程度に、本明細書中に参照により取り込まれる。 The disclosure of Japanese Patent Application No. 2021-021960 filed on February 15, 2021 is incorporated herein by reference in its entirety. In addition, all publications, patent applications, and technical standards mentioned herein are to the same extent as if each individual publication, patent application, or technical standard were specifically and individually noted to be incorporated by reference. , incorporated herein by reference.

Claims (4)

  1. 　少なくとも一つのプロセッサを備える情報処理装置であって、
    　前記プロセッサは、
    　記録先の磁気テープが対応付けられた複数のデータを、複数のテープドライブを用いて複数の磁気テープに記録する制御を行う場合であって、かつ記録先の磁気テープの数が使用可能なテープドライブの数よりも多い場合、
    　少なくとも１回は磁気テープへのデータの記録を中断し、中断した磁気テープへのデータの記録を中断前のテープドライブとは異なるテープドライブで再開する制御を行う
    　情報処理装置。     An information processing device comprising at least one processor,
    The processor
    When controlling the recording of multiple data associated with recording destination magnetic tapes on multiple magnetic tapes using multiple tape drives, and the number of recording destination magnetic tapes is usable. more than the number of drives,
    An information processing device that interrupts data recording on a magnetic tape at least once and resumes the interrupted data recording on a magnetic tape with a tape drive different from the tape drive before the interruption.
  2. 　前記プロセッサは、
    　前記複数のテープドライブそれぞれが磁気テープに記録するデータの総容量が平準化されるように、前記複数のデータを、前記複数のテープドライブを用いて前記複数の磁気テープに記録する制御を行う
    　請求項１に記載の情報処理装置。     The processor
    Control is performed to record the plurality of data onto the plurality of magnetic tapes using the plurality of tape drives so that the total capacity of the data recorded on the magnetic tapes by the plurality of tape drives is leveled. Item 1. The information processing apparatus according to item 1.
  3. 　記録先の磁気テープが対応付けられた複数のデータを、複数のテープドライブを用いて複数の磁気テープに記録する制御を行う場合であって、かつ記録先の磁気テープの数が使用可能なテープドライブの数よりも多い場合、
    　少なくとも１回は磁気テープへのデータの記録を中断し、中断した磁気テープへのデータの記録を中断前のテープドライブとは異なるテープドライブで再開する制御を行う
    　処理を情報処理装置が備えるプロセッサが実行する情報処理方法。     When controlling the recording of multiple pieces of data associated with recording destination magnetic tapes on multiple magnetic tapes using multiple tape drives, and the number of recording destination magnetic tapes is usable. more than the number of drives,
    A processor provided in an information processing device performs control to interrupt data recording on a magnetic tape at least once and resume the interrupted data recording on a magnetic tape with a tape drive different from the tape drive before the interruption. The information processing method to be performed.
  4. 　記録先の磁気テープが対応付けられた複数のデータを、複数のテープドライブを用いて複数の磁気テープに記録する制御を行う場合であって、かつ記録先の磁気テープの数が使用可能なテープドライブの数よりも多い場合、
    　少なくとも１回は磁気テープへのデータの記録を中断し、中断した磁気テープへのデータの記録を中断前のテープドライブとは異なるテープドライブで再開する制御を行う
    　処理を情報処理装置が備えるプロセッサに実行させるための情報処理プログラム。     When controlling the recording of multiple pieces of data associated with recording destination magnetic tapes on multiple magnetic tapes using multiple tape drives, and the number of recording destination magnetic tapes is usable. more than the number of drives,
    A processor provided in an information processing device performs control to interrupt data recording on a magnetic tape at least once and resume the interrupted data recording on a magnetic tape with a tape drive different from the tape drive before the interruption. Information processing program for execution.
PCT/JP2021/042671 2021-02-15 2021-11-19 Information processing device, information processing method, and information processing program WO2022172550A1 (en)

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JP2004355681A (en) * 2003-05-27 2004-12-16 Sharp Corp Reproducing device, reproducing method, reproducing program, and recording medium recording reproducing program
JP2006216104A (en) * 2005-02-01 2006-08-17 Nec Personal Products Co Ltd Recording medium library apparatus
JP2013206017A (en) * 2012-03-28 2013-10-07 Nec Corp Recording system, data recording method, and program
JP2014115807A (en) * 2012-12-10 2014-06-26 International Business Maschines Corporation Method for writing file into a plurality of media and storage system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004355681A (en) * 2003-05-27 2004-12-16 Sharp Corp Reproducing device, reproducing method, reproducing program, and recording medium recording reproducing program
JP2006216104A (en) * 2005-02-01 2006-08-17 Nec Personal Products Co Ltd Recording medium library apparatus
JP2013206017A (en) * 2012-03-28 2013-10-07 Nec Corp Recording system, data recording method, and program
JP2014115807A (en) * 2012-12-10 2014-06-26 International Business Maschines Corporation Method for writing file into a plurality of media and storage system

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