WO2022049903A1 - 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
WO2022049903A1
WO2022049903A1 PCT/JP2021/026637 JP2021026637W WO2022049903A1 WO 2022049903 A1 WO2022049903 A1 WO 2022049903A1 JP 2021026637 W JP2021026637 W JP 2021026637W WO 2022049903 A1 WO2022049903 A1 WO 2022049903A1
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Prior art keywords
magnetic tape
recording
information processing
update
recorded
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PCT/JP2021/026637
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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 JP2022546914A priority Critical patent/JPWO2022049903A1/ja
Publication of WO2022049903A1 publication Critical patent/WO2022049903A1/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
    • G06F16/13—File access structures, e.g. distributed indices
    • 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

Definitions

  • the disclosed technology relates to information processing devices, information processing methods, and information processing programs.
  • the following techniques are known as techniques for recording updated objects for which new objects have been updated.
  • Japanese Patent Application Laid-Open No. 2010-272011 describes an overlay network system including an overlay network composed of a plurality of nodes each having a unique node ID and a client terminal using the overlay network.
  • each of the plurality of nodes or the client terminal is a first object ID setting means for setting the object ID of the newly created object, and the newly created object is used as a tree part in the object ID.
  • It is a first object ID setting means for setting a representative value which is a unique value and a second object ID setting means for setting an object ID of an updated object, and is a tree part in the object ID before updating. It has a second object ID setting means for setting the value of the tree portion in the object ID of the object.
  • Each of the plurality of nodes has an object storage means for registering an object, and whether the registration destination node to which the newly created or updated object should be registered is the node itself, the object ID of the object. Judgment is made based on whether the node ID of the node itself is the closest to the tree part in, and if it is determined that the node itself is the registration destination node, the requested object is associated with the object ID and the node Register with your own object storage means.
  • the object update process in the object storage system is not performed by overwriting the object, but by creating a new object after the update separately from the object before the update. Therefore, when an object is recorded on a magnetic tape, the updated object (hereinafter referred to as an updated object) is recorded as an object different from the object before the update (hereinafter referred to as a new object).
  • the object to be deleted cannot be deleted independently. Therefore, for example, an object containing metadata indicating that the object to be deleted has been deleted (hereinafter referred to as “object”).
  • object an object containing metadata indicating that the object to be deleted has been deleted (hereinafter referred to as “object”).
  • object an object containing metadata indicating that the object to be deleted has been deleted
  • the disclosed technology was made in view of the above circumstances, and aims to facilitate the understanding of the history of objects recorded on magnetic tape.
  • the information processing device is an information processing device including at least one processor, and the processor indicates that the object to be recorded is an updated object that is an update of a new object, or a new object is deleted.
  • the processor indicates that the object to be recorded is an updated object that is an update of a new object, or a new object is deleted.
  • control is performed to record the updated object or the deleted object on the corresponding magnetic tape, which is the magnetic tape on which the corresponding new object is recorded.
  • the processor may control to record a new object on a magnetic tape whose free space is equal to or greater than the first threshold value. That is, the processor may control to prohibit recording of new objects on magnetic tape whose free space is less than the first threshold.
  • the processor may control to record the update object on the corresponding magnetic tape whose free space is smaller than the first threshold value and equal to or larger than the second threshold value. That is, the processor may control to prohibit recording of the update object on the corresponding magnetic tape whose free space is smaller than the first threshold value and less than the second threshold value.
  • the processor may control to record the update object on a specific magnetic tape different from the corresponding magnetic tape.
  • the processor may control the recording of the deleted object on a specific magnetic tape when the corresponding magnetic tape does not have the free space required for recording the deleted object.
  • the processor may control recording the identification information of the corresponding magnetic tape on the storage medium attached to the specific magnetic tape or the cartridge accommodating the specific magnetic tape.
  • the processor may control to construct an object group in which a plurality of objects to be recorded are grouped for each type of new object, update object, and deleted object, and record various different object groups on the same magnetic tape. ..
  • the processor controls to record objects containing multiple update objects after objects containing multiple new objects, and objects containing multiple deleted objects after objects containing multiple update objects. You may go.
  • the information processing method according to the disclosure technique corresponds to the update object or the deletion object.
  • 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 corresponding magnetic tape, which is a magnetic tape on which a new object is recorded.
  • the information processing program corresponds to the update object or the deletion object.
  • This is an information processing program for causing at least one processor of an information processing device to execute a process of controlling recording on a corresponding magnetic tape, which is a magnetic tape on which a new object is recorded.
  • 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 object for which storage is requested from an external device such as a user terminal is recorded on the 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.
  • 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 is 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 storage unit 103 stores a recording target object 120, which is an object to be recorded on the magnetic tape 30.
  • the recording target object 120 stored in the storage unit 103 is recorded on the magnetic tape 30 at an instruction from the outside or a predetermined timing.
  • the recording target object 120 includes a new object 121, an update object 122, and a deleted object 123.
  • the new object 121 is an object newly recorded in the recording / reproduction system 1.
  • the update object 122 is an update of the new object 121, and is, for example, an object in which a part or all of the data contained in a new object 121 has been changed.
  • the deleted object 123 is an object indicating that a new object 121 has been deleted.
  • the deleted object 123 has metadata indicating that the object to be deleted has been deleted.
  • the new object 121, the update object 122, and the deleted object 123 are stored as separate objects. That is, in the recording / playback system 1, the object is updated not by so-called "data overwriting" but by the addition of the updated object. In addition, the deletion of an object is treated as if the corresponding object was deleted by adding the deleted object.
  • the update object 122 and the deleted object 123 are given the same identification information as the corresponding new object 121.
  • the identification information may be an object key which is a UUID (Universally Unique Identifier) for uniquely identifying an object.
  • the storage unit 103 stores the recording information 130 regarding the object recorded on the magnetic tape 30.
  • FIG. 3 is a diagram showing an example of the recorded information 130.
  • the recording information 130 at least the identification information of each object recorded on the magnetic tape 30 and the identification information of the magnetic tape 30 on which the object is recorded are recorded in association with each other.
  • the recording information 130 it is possible to grasp whether or not an object having certain identification information has been recorded on the magnetic tape 30. Therefore, if the same identification information of the recording target object 120 is already recorded in the recording information 130, the recording target object 120 can be identified as the update object 122. Since the deleted object 123 has metadata indicating that the object to be deleted has been deleted, it can be identified from the metadata that the object is the deleted object 123.
  • the recording information 130 it is possible to specify the corresponding magnetic tape which is the magnetic tape 30 on which the new object 121 corresponding to the update object 122 and the deletion object 123 is recorded.
  • the recording information 130 may constitute a metadata database in which the metadata of each object recorded on the magnetic tape 30 is aggregated.
  • FIG. 4 is a functional block diagram showing an example of the functional configuration of the information processing apparatus 10 when the recording target object 120 is recorded on the magnetic tape 30.
  • the information processing apparatus 10 includes a determination unit 11, a specific unit 12, and a recording unit 13.
  • the CPU 101 executes the information processing program 110, the information processing apparatus 10 functions as a determination unit 11, a specific unit 12, and a recording unit 13.
  • the determination unit 11 determines the type of the object for each of the recording target objects 120. That is, the determination unit 11 determines whether each of the recording target objects 120 is any of the new object 121, the update object 122, and the deleted object 123.
  • the determination unit 11 determines that the object is a new object 121. Further, when the object to be determined is already recorded in the recording information 130, the determination unit 11 determines that the object is the update object 122 or the deletion object 123. The determination unit 11 can identify whether the object is the update object 122 or the deletion object 123 from the metadata of the object.
  • the specifying unit 12 specifies a magnetic tape (hereinafter referred to as a corresponding magnetic tape 30A) in which a new object 121 corresponding to the object is recorded for the object determined to be the update object 122 or the deleted object 123 by the determination unit 11. do.
  • the identification unit 12 can specify the corresponding magnetic tape 30A by referring to the recording information 130.
  • the recording unit 13 controls the recording of the new object 121 on the magnetic tape 30 whose free space is equal to or greater than the first threshold among the magnetic tapes 30 housed in the tape library 20, and the tape drive in which the magnetic tape 30 is loaded. Do for 40. That is, the recording unit 13 controls to prohibit recording of the new object 121 on the magnetic tape 30 whose free capacity is less than the first threshold value.
  • the recording unit 13 controls to record the update object 122 on the corresponding magnetic tape 30A when the free space of the corresponding magnetic tape 30A specified by the specific unit 12 is equal to or larger than the second threshold value smaller than the first threshold value. This is performed for the tape drive 40 loaded with the corresponding magnetic tape 30A. That is, the recording unit 13 controls to prohibit recording of the update object 122 on the corresponding magnetic tape 30A whose free capacity is less than the second threshold value. When the free space of the corresponding magnetic tape 30A is less than the second threshold value, the recording unit 13 controls the tape drive 40 loaded with the dedicated magnetic tape 30B to record the update object 122 on the dedicated magnetic tape 30B. conduct.
  • the dedicated magnetic tape 30B is a magnetic tape used only for recording the update object 122 and the deletion object 123.
  • the dedicated magnetic tape 30B is an example of a "specific magnetic tape" in the disclosed technology.
  • the recording unit 13 controls the corresponding magnetic tape 30A to record the deleted object 123 on the corresponding magnetic tape 30A.
  • the recording unit 13 controls the tape drive 40 loaded with the dedicated magnetic tape 30B to record the deleted object 123 on the dedicated magnetic tape 30B.
  • the recording unit 13 When the recording unit 13 records the update object 122 or the deletion object 123 on the dedicated magnetic tape 30B, the corresponding magnetic tape 30A (that is, the new object 121 corresponding to the update object 122 or the deletion object 123 recorded on the dedicated magnetic tape 30B) Control is performed to record the identification information of the recorded magnetic tape) in a predetermined recording area of the dedicated magnetic tape 30B. This makes it easy to identify the location of the new object 121 corresponding to the update object 122 or the deleted object 123 recorded on the dedicated magnetic tape 30B.
  • the recording unit 13 may control recording the identification information of the corresponding magnetic tape 30A on a non-volatile storage medium (cartridge memory) attached to the cartridge accommodating the dedicated magnetic tape 30B.
  • FIG. 5A is a diagram showing an example of an object recorded on the corresponding magnetic tape 30A.
  • FIG. 5B is a diagram showing an example of an object recorded on the dedicated magnetic tape 30B.
  • a new object 121 and corresponding update objects 122 and deleted objects 123 are recorded on the corresponding magnetic tape 30A.
  • the dedicated magnetic tape 30B records the update object 122 and the deleted object 123 that are not recorded on the corresponding magnetic tape 30A due to the free space.
  • the identification information 140 of the corresponding magnetic tape 30A is recorded on the dedicated magnetic tape 30B.
  • FIG. 6 is a flowchart showing an example of the flow of recording processing executed by the CPU 101 executing the information processing program 110.
  • the information processing program 110 is executed, for example, at a predetermined timing for recording the recording target object 120 on the magnetic tape 30.
  • step S1 the determination unit 11 selects one of the recording target objects 120 stored in the storage unit 103.
  • step S2 the determination unit 11 determines whether or not the recording target object 120 selected in step S1 is a new object 121. If the identification information of the recording target object 120 is not recorded in the recording information 130, the determination unit 11 determines that the recording target object 120 is a new object 121. On the other hand, when the identification information of the recording target object 120 is already recorded in the recording information 130, the determination unit 11 is not the new object 121 (the update object 122 or the deleted object 123). Is determined.
  • the determination unit 11 determines that the recording target object 120 selected in step S1 is a new object 121
  • the determination unit 11 shifts the process to step S3.
  • the determination unit 11 determines that the recording target object 120 selected in step S1 is not the new object 121
  • the determination unit 11 shifts the process to step S4.
  • step S3 the recording unit 13 controls the recording target object 120 selected in step S1 to be recorded on the magnetic tape 30 having a free space equal to or greater than the first threshold value on the tape drive 40 loaded with the magnetic tape 30. Do it against.
  • step S4 the identification unit 12 identifies the corresponding magnetic tape 30A for the recording target object 120 (that is, the update object 122 or the deletion object 123) selected in step S1.
  • the identification unit 12 can specify the corresponding magnetic tape 30A by referring to the recording information 130.
  • step S5 the determination unit 11 determines whether or not the recording target object 120 selected in step S1 is the update object 122.
  • the determination unit 11 can identify whether the object is the update object 122 or the deletion object 123 from the metadata of the object.
  • the determination unit 11 shifts the process to step S6.
  • the determination unit 11 determines that the recording target object 120 selected in step S1 is not the update object 122 (the deleted object 123)
  • the process proceeds to step S9.
  • step S6 the recording unit 13 determines whether or not the free capacity of the corresponding magnetic tape 30A specified in step S4 is equal to or greater than the second threshold value ( ⁇ first threshold value).
  • the recording unit 13 shifts the process to step S7.
  • the processing proceeds to step S8.
  • step S7 the recording unit 13 is loaded with the corresponding magnetic tape 30A to control the recording of the update object 122, which is the recording target object 120 selected in step S1, on the corresponding magnetic tape 30A specified in step S4. This is done for the tape drive 40.
  • step S8 the recording unit 13 controls the tape drive 40 loaded with the dedicated magnetic tape 30B to record the update object 122, which is the recording target object 120 selected in step S1, on the dedicated magnetic tape 30B. ..
  • step S9 the recording unit 13 determines whether or not the corresponding magnetic tape 30A specified in step S4 has the necessary free space.
  • the processing proceeds to step S7.
  • step S7 the recording unit 13 controls the recording of the deleted object 123, which is the recording target object 120 selected in step S1, on the corresponding magnetic tape 30A specified in step S4. This is done for the loaded tape drive 40.
  • step S8 the recording unit 13 controls the tape drive 40 loaded with the dedicated magnetic tape 30B to record the deleted object 123, which is the recording target object 120 selected in step S1, on the dedicated magnetic tape 30B. Do it against.
  • step S10 the recording unit 13 controls to record the identification information of the corresponding magnetic tape 30A specified in step S4 in a predetermined recording area of the dedicated magnetic tape 30B.
  • step S11 the recording unit 13 determines whether or not all the recording target objects 120 stored in the storage unit 103 have been recorded on the magnetic tape 30.
  • the recording unit 13 determines that the recording of all the recording target objects 120 stored in the storage unit 103 on the magnetic tape 30 is completed.
  • the recording unit 13 terminates this routine.
  • the process returns to step S1.
  • the processes of steps S1 to S11 are repeated until the recording of all the recording target objects 120 stored in the storage unit 103 on the magnetic tape 30 is completed.
  • the recording target object 120 is the update object 122 or the deletion object 123
  • the update object 122 or the deletion object 123 and the corresponding new object 121 are recorded.
  • Control is performed to record on the corresponding magnetic tape 30A, which is the magnetic tape 30.
  • the update object 122 or the deleted object 123 is recorded on a magnetic tape 30 different from the corresponding new object 121, is the object recorded on the magnetic tape 30 deleted or updated? , If it has been updated, it may be difficult to grasp the history of the object, such as whether it is the latest object.
  • the information processing apparatus 10 since the new object 121, the update object 122, and the deleted object 123 having a corresponding relationship with each other are recorded on the same magnetic tape 30, the objects recorded on the magnetic tape 30 are recorded. It is possible to easily grasp the history of the object.
  • the information processing apparatus 10 controls to record the new object 121 on the magnetic tape 30 whose free capacity is equal to or greater than the first threshold value. In other words, recording of the new object 121 on the magnetic tape 30 whose free space is less than the first threshold is prohibited. In this way, by limiting the recording of the new object 121 on the magnetic tape 30 according to the free space of the magnetic tape 30, an area for recording the update object 122 and the deleted object 123 is secured on the magnetic tape 30. can do. In the corresponding magnetic tape 30A, it is possible to suppress the possibility that a situation occurs in which the update object 122 or the deleted object 123 cannot be recorded on the corresponding magnetic tape 30A due to insufficient free space.
  • the information processing apparatus 10 controls to record the update object 122 on the corresponding magnetic tape 30A whose free capacity is equal to or larger than the second threshold value. In other words, recording of the update object 122 on the corresponding magnetic tape 30A whose free space is less than the second threshold is prohibited. In this way, by limiting the recording of the update object 122 on the corresponding magnetic tape 30A according to the free space of the corresponding magnetic tape 30A, a recording area for recording the deleted object 123 on the corresponding magnetic tape 30A is secured. Can be done. Since it is assumed that the data size of the deleted object 123 is smaller than that of the new object 121 and the updated object 122, the free space for recording the deleted object 123 can be made relatively small. ..
  • the information processing apparatus 10 controls to record the update object 122 on the dedicated magnetic tape 30B when the free capacity of the corresponding magnetic tape 30A is less than the second threshold value. Further, the information processing apparatus 10 controls to record the deleted object 123 on the dedicated magnetic tape 30B when the corresponding magnetic tape 30A does not have the free space required for recording the deleted object 123. In this way, the update object 122 and the deleted object 123 that are not recorded on the corresponding magnetic tape 30A due to the free space of the corresponding magnetic tape 30A can be recorded on the dedicated magnetic tape 30B used only for recording these objects. , It is possible to prevent these objects from being distributed and recorded on a plurality of magnetic tapes.
  • the information processing apparatus 10 records the identification information of the corresponding magnetic tape 30A in a predetermined recording area of the dedicated magnetic tape 30B or a non-volatile storage medium (cartridge memory) attached to the cartridge accommodating the dedicated magnetic tape 30B. Control to do. This makes it easy to identify the location of the new object 121 corresponding to the update object 122 or the deleted object 123 recorded on the dedicated magnetic tape 30B.
  • a non-volatile storage medium carrier memory
  • FIG. 7 is a functional block diagram showing an example of the functional configuration of the information processing apparatus 10 according to the second embodiment of the disclosed technology.
  • the information processing apparatus 10 according to the second embodiment includes a determination unit 11, a specific unit 12, a packing unit 14, and a recording unit 13.
  • the CPU 101 executes the information processing program 110
  • the information processing apparatus 10 functions as a determination unit 11, a specific unit 12, a packing unit 14, and a recording unit 13. Since the processing performed by the determination unit 11 and the specific unit 12 is the same as that of the information processing apparatus 10 according to the first embodiment described above, the description thereof will be omitted.
  • the packing unit 14 performs a packing process for collecting a plurality of objects for each type of object.
  • An object group including a plurality of objects constructed by this packing process is hereinafter referred to as a packed object.
  • 8A, 8B, and 8C are diagrams showing an example of the configuration of the packed object constructed by the packing unit 14.
  • the packing unit 14 constructs a packed object 200A in which a plurality of new objects 121 are put together. Further, as shown in FIG. 8B, the packing unit 14 constructs a packed object 200B in which a plurality of update objects 122 are grouped together. The packing unit 14 constructs the packed object 200B so that a plurality of updated objects 122 having the same corresponding magnetic tape 30A specified by the specific unit 12 are included in the same packed object. Further, the packing unit 14 constructs the packed object 200B so that a plurality of updated objects 122 having different corresponding magnetic tapes 30A specified by the specific unit 12 are included in the packed objects different from each other. Further, as shown in FIG.
  • the packing unit 14 constructs a packed object 200C in which a plurality of deleted objects 123 are put together.
  • the packing unit 14 constructs the packed object 200C so that a plurality of deleted objects 123 having the same corresponding magnetic tape 30A specified by the specific unit 12 are included in the same packed object.
  • the packing unit 14 constructs the packed object 200C so that a plurality of deleted objects 123 having different corresponding magnetic tapes 30A specified by the specific unit 12 are included in the packed objects different from each other.
  • the packed objects 200A, 200B, and 200C each include a header 150.
  • the header 150 contains, for example, information about the position of each object included in the packed object within the packed object.
  • the information regarding this position may be, for example, information on the number of bytes to the number of bytes in the packed object in which the object exists.
  • the recording unit 13 records the recording target object 120 on the magnetic tape 30 in units of packed objects.
  • the recording unit 13 controls the recording of the packed object 200A in which the new objects 121 are put together on the magnetic tape 30 whose free space is equal to or larger than the first threshold value among the magnetic tapes 30 housed in the tape library 20.
  • the recording unit 13 controls to prohibit recording of the new object 121 on the magnetic tape 30 whose free capacity is less than the first threshold value.
  • the recording unit 13 When the free space of the corresponding magnetic tape 30A specified by the specific unit 12 is equal to or larger than the second threshold value smaller than the first threshold value, the recording unit 13 is a packed object in which the update object 122 is collected on the corresponding magnetic tape 30A. Control to record 200B is performed on the tape drive 40 loaded with the corresponding magnetic tape 30A. That is, the recording unit 13 controls to prohibit recording of the update object 122 on the corresponding magnetic tape 30A whose free capacity is less than the second threshold value. The recording unit 13 controls to record the packed object 200B including the update object 122 after the packed object 200A including the new object 121. When the free space of the corresponding magnetic tape 30A is less than the second threshold value, the recording unit 13 controls to record the packed object 200B including the update object 122 on the dedicated magnetic tape 30B.
  • the recording unit 13 controls to record the packed object 200C in which the deleted objects 123 are collected on the corresponding magnetic tape 30A. Is performed on the tape drive 40 loaded with the corresponding magnetic tape 30A. The recording unit 13 records the packed object 200C including the deleted object 123 after the packed object 200B including the update object 122. When the corresponding magnetic tape 30A does not have the required free space, the recording unit 13 controls to record the packed object 200C including the deleted object 123 on the dedicated magnetic tape 30B.
  • the recording unit 13 When the recording unit 13 records the packed object 200B including the update object or the packed object 200C including the deletion object 123 on the dedicated magnetic tape 30B, the corresponding magnetic tape 30A (that is, the update object 122 or the deletion object recorded on the dedicated magnetic tape 30B) Control is performed to record the identification information of the magnetic tape on which the new object 121 corresponding to 123 is recorded in a predetermined recording area of the dedicated magnetic tape 30B.
  • FIG. 9A is a diagram showing an example of a packed object recorded on the corresponding magnetic tape 30A.
  • FIG. 9B is a diagram showing an example of a packed object recorded on the dedicated magnetic tape 30B.
  • the corresponding magnetic tape 30A records a packed object 200A that collects new objects 121, a packed object 200B that collects corresponding update objects 122, and a packed object 200C that collects deleted objects 123. Will be done.
  • the dedicated magnetic tape 30B records the packed objects 200B and 200C that are not recorded on the corresponding magnetic tape 30A due to the free space. Further, the identification information 140 of the corresponding magnetic tape 30A is recorded on the dedicated magnetic tape 30B.
  • the information processing apparatus 10 When recording an object on the magnetic tape 30, 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.
  • a plurality of objects included in the packed object are recorded in a cohesive state on the magnetic tape 30.
  • the information processing apparatus 10 reads out the object recorded on the magnetic tape 30 in units of packed objects.
  • the information processing device 10 extracts only the object to be read from the objects included in the read packed object, and transmits the object to an external device such as a user terminal that has issued the read request.
  • FIG. 10 is a flowchart showing an example of the flow of recording processing executed by the CPU 101 executing the information processing program 110.
  • the information processing program 110 is executed, for example, at a predetermined timing for recording the recording target object 120 on the magnetic tape 30.
  • step S21 the determination unit 11 determines the type of the object for each of the recording target objects 120 stored in the storage unit 103. That is, the determination unit 11 determines for each of the recording target objects 120 whether the object is a new object 121, an update object 122, or a deleted object 123.
  • step S22 the packing unit 14 constructs a packed object 200A for a plurality of objects determined to be new objects 121 in step S21.
  • step S23 the recording unit 13 controls the recording of the packed object 200A constructed in step S22 on the magnetic tape 30 whose free capacity is equal to or greater than the first threshold value on the tape drive 40 loaded with the magnetic tape 30. Do it against. After that, the recording unit 13 adds the recording information 130 for the recording of the new object 121 in this step S23.
  • step S24 the specifying unit 12 identifies the corresponding magnetic tape 30A for each object determined to be an update object in step S21.
  • the identification unit 12 can specify the corresponding magnetic tape 30A by referring to the recording information 130.
  • step S25 the packing unit 14 constructs the packed object 200B so that a plurality of updated objects 122 having the same corresponding magnetic tape 30A specified in step S24 are included in the same packed object. Further, the packing unit 14 constructs the packed object 200B so that a plurality of updated objects 122 having different corresponding magnetic tapes 30A specified in step S24 are included in the packed objects different from each other.
  • step S26 the recording unit 13 determines whether or not the free capacity of the corresponding magnetic tape 30A specified in step S24 is equal to or greater than the second threshold value ( ⁇ first threshold value).
  • the recording unit 13 shifts the process to step S27.
  • the processing proceeds to step S28.
  • the processing in this step S25 is performed for each corresponding magnetic tape 30A.
  • step S27 the recording unit 13 controls the recording of the packed object 200B constructed in step S25 on the corresponding magnetic tape 30A specified in step S24 with respect to the tape drive 40 loaded with the corresponding magnetic tape 30A. conduct.
  • step S28 the recording unit 13 controls the tape drive 40 loaded with the dedicated magnetic tape 30B to record the packed object 200B constructed in step S25 on the dedicated magnetic tape 30B.
  • step S29 the specifying unit 12 specifies the corresponding magnetic tape 30A for each object determined to be a deleted object in step S21.
  • the identification unit 12 can specify the corresponding magnetic tape by referring to the recording information 130.
  • step S30 the packing unit 14 constructs the packed object 200C so that a plurality of deleted objects 123 having the same corresponding magnetic tape 30A specified in step S29 are included in the same packed object. Further, the packing unit 14 constructs the packed object 200C so that the plurality of deleted objects 123 having different corresponding magnetic tapes 30A specified in step S29 are included in the packed objects different from each other.
  • step S31 the recording unit 13 determines whether or not the corresponding magnetic tape 30A specified in step S29 has free space required for recording the packed object 200C.
  • the processing proceeds to step S32.
  • the recording unit 13 determines that the corresponding magnetic tape 30A does not have the necessary free space, the process shifts to step S33.
  • the determination in this step S31 is made for each corresponding magnetic tape 30A.
  • step S32 the recording unit 13 controls the recording of the packed object 200C constructed in step S30 on the corresponding magnetic tape 30A specified in step S29 to the tape drive 40 loaded with the corresponding magnetic tape 30A. conduct.
  • step S33 the recording unit 13 controls the tape drive 40 loaded with the dedicated magnetic tape 30B to record the packed object 200C constructed in step S30 on the dedicated magnetic tape 30B.
  • step S34 the recording unit 13 controls to record the identification information of the corresponding magnetic tape 30A specified in steps S24 and S29 in a predetermined recording area of the dedicated magnetic tape 30B.
  • the information processing apparatus 10 constructs packed objects 200A, 200B, and 200C in which a plurality of recording target objects 120 are grouped for each object type, and corresponds to each other. Control is performed to record the related packed objects 200A, 200B, and 200C on the same magnetic tape (corresponding magnetic tape 30A).
  • the new object 121, the update object 122, and the deleted object 123 having a corresponding relationship with each other are the same magnetic tape 30 as in the information processing apparatus 10 according to the first embodiment. Since it is recorded on the magnetic tape 30, it is possible to easily grasp the history of the object recorded on the magnetic tape 30.
  • the object to be read it is possible to grasp whether or not the object to be read has been deleted by first accessing the packed object 200C in which the deleted objects 123 are collected. can. If the object to be read has not been deleted, the latest object can be read by accessing the packed object 200B in which the update objects 122 are collected.
  • the reading of the objects is more efficient than in the case of recording the various different objects without collecting them. It will be possible to do it.
  • the hardware structure of the processing unit (processing unit) that executes various processes such as the determination unit 11, the specific unit 12, the recording unit 13, and the packing 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 110 is stored (installed) in the storage unit 103 in advance, but the present invention is not limited to this.
  • the information processing program 110 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 110 may be downloaded from an external device via a network.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Data Mining & Analysis (AREA)
  • Databases & Information Systems (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

Ce dispositif de traitement d'informations comprend au moins un processeur. Lorsqu'un objet à enregistrer est un objet de mise à jour qui est une mise à jour d'un nouvel objet ou est un objet de suppression indiquant qu'un nouvel objet est supprimé, le processeur commande l'enregistrement de l'objet de mise à jour ou de l'objet de suppression sur une bande magnétique correspondante qui est une bande magnétique sur laquelle est enregistré le nouvel objet correspondant.
PCT/JP2021/026637 2020-09-04 2021-07-15 Dispositif, procédé et programme de traitement d'informations WO2022049903A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05307443A (ja) * 1991-03-08 1993-11-19 Hitachi Ltd 磁気テープのデータ管理方法及び磁気テープ記憶装置
JPH09198553A (ja) * 1996-01-16 1997-07-31 Sanwa New Tec Kk 磁気カード

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05307443A (ja) * 1991-03-08 1993-11-19 Hitachi Ltd 磁気テープのデータ管理方法及び磁気テープ記憶装置
JPH09198553A (ja) * 1996-01-16 1997-07-31 Sanwa New Tec Kk 磁気カード

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