JP2011204165A - File storage controller and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a file storage technology for effectively utilizing resources while storing files without any difference between clients.SOLUTION: The file storage controller includes: a file storage means for tentatively storing one or a plurality of files to be stored; a file selection means for calculating the total size of the files stored in the file storage means, calculating a confidential level rate upper limit file size by multiplying the total file size and a predetermined confidential level rate, and selecting a combination of the files whose total file size is maximum without exceeding the confidential level rate upper limit file size from the files stored in the file storage means; and a storage processing means for storing the files selected by the file selection means in a data center corresponding to an index value indicating high reliability and storing the other files in a data center corresponding to an index value indicating low reliability.

Description

  The present invention provides a data center as a storage destination among a plurality of data centers based on an evaluation value corresponding to a department, a job title, etc. to which the storage requester belongs when storing the file of the storage requester in the data center. This is related to the technology for selecting files and storing the files in the selected data center.

  In recent years, in order to reduce costs and the like, there are an increasing number of cases where files held by a company are stored in an external data center instead of being stored in a file server in the company.

  The files to be stored include various types of files such as documents, image data, audio data, programs, log information, and the like. Also, the file size varies from, for example, a document of several pages for notification to an instruction of several hundred pages even for a document.

  Furthermore, with regard to the confidentiality of files, there are various confidential files ranging from information that does not pose a problem even if it is disclosed to a person other than the company, to information that allows only a specific person within the company or within the company to refer to it. is there.

  On the other hand, for the data center, the installation location, equipment safety (storage server reliability), data center storage mode (operation / maintenance personnel reference prevention measures, wiretapping prevention measures during file transfer), operator skills Depending on the file and the storage / reading communication speed, the file storage fee, reliability, and the like differ for each data center.

  A company that uses file storage in a data center contracts with multiple data centers, and optimizes cost and safety by selecting a data center that should be stored according to file size and sensitivity. ing.

  Here, as a prior art document relating to a method for evaluating a plurality of data centers and selecting a data center for storing files from the plurality of data centers, there is the following Patent Document 1.

  In the technique disclosed in Patent Document 1, a storage requester evaluates reliability and storage charges for a plurality of data centers and determines a data center to be stored. With this technology, the burden on the storage requester is large, and the storage requester tends to select a data center with the highest possible reliability, and if the reliability and storage charges are proportional, the storage cost is low. There is a problem that becomes high.

  In order to deal with such problems, the confidentiality is set in advance from the job title of the storage requester and the work contents of the department (project, etc.), and the data center of the storage destination is automatically selected according to the set confidentiality. There is a method.

  In this method, the size of a file that can be stored as a highly confidential file is set according to the confidentiality of the storage requester set in advance, and evaluation is performed based on the communication speed, storage fee, reliability, etc. Determine the data center of the storage location. For example, a high-confidence job / department can store files with high confidentiality up to 500 Mbytes, and a low-confidence, job title / department can store files with high confidentiality up to 200 Mbytes. Is done.

JP 2006-146293 A

  In the above conventional technology, the file size that can be stored as a highly confidential file is set according to the confidentiality of each storage requester, and the storage destination data is evaluated by evaluating the communication speed, storage fee, reliability, etc. The method for determining the center has the following problems.

  When multiple storage requesters with the same confidentiality set according to job title and department try to store multiple files, one storage requester can store all of them as highly sensitive files, but the other has one There is a case where only a certain number of files can be stored as a highly sensitive file, and there is a problem that even if the client is a storage requester corresponding to the same confidentiality, the handling is different.

  In the prior art, since a file size that can be stored as a highly sensitive file is set for each storage requester, there is a free file size that can be stored as a highly confidential file for one storage requester. In spite of this, there is a possibility that the other storage requester does not have a free space and the file needs to be stored in a data center corresponding to a file with low confidentiality, and there is a problem that resources cannot be used effectively. .

  The present invention has been made in view of such problems, and it is possible to effectively use resources without causing a difference in handling between storage requesters corresponding to the same confidentiality. The purpose is to provide file storage technology.

  In order to solve the above-described problems, the present invention provides a file storage control apparatus connected to a storage requester terminal and a plurality of data centers via a communication network. The storage requester information storage means for storing the ratio, the data center information storage means for storing the index value indicating the reliability of the data center for each data center, and the storage requester for each storage requester to be stored in the data center The storage target file storage means for temporarily storing one or a plurality of files and the storage requester corresponding to the storage requester identification information received from the storage requester terminal are stored in the storage target file storage means. The file size total upper limit file size is calculated by calculating the total file size of the existing file and multiplying the file size total by the device density ratio. The file selection means for selecting the combination of files whose total file size is the maximum without exceeding the confidentiality ratio upper limit file size from the files stored in the storage target file storage means, and the file selection means. Are stored in a data center corresponding to an index value indicating high reliability, and files other than the file selected by the file selection unit among the files stored in the storage target file storage unit are low-reliable. A file storage control device comprising storage processing means for storing in a data center corresponding to the index value indicating the degree.

  The file storage control device may include file storage destination information storage means for storing a file name, a file size, and identification information of a storage destination data center of a file already stored in the data center. When there is a file that is already stored in the data center with respect to the requester, the file selection means includes the total file size of the files stored in the storage target file storage means and the file center already stored in the data center. The file size total upper limit file size is calculated by calculating the sum of the file size totals of the existing files and multiplying the total by the device density ratio, and the total file size exceeds the device density ratio upper limit file size. The largest file combination is stored in the storage target file storage means. Selected from the recorded file and the file recorded in the file storage location information storage means, and the storage processing means corresponds to the index value indicating the high reliability of the file selected by the file selection means. A file other than the file selected by the file selection unit among the files stored in the storage target file storage unit and the files recorded in the file storage destination information storage unit. Alternatively, the data center corresponding to the index value indicating the low reliability may be stored.

  In addition, when the file selected by the file selection means includes a file in which the data center already stored is different from the storage destination data center determined by the file selection, the file selection means is different from the file selection means. A file is acquired from the already stored data center and stored in the storage target file storage unit, and the storage processing unit stores the acquired file in a storage destination data center determined by the file selection. You may do it.

  The index value indicating the high reliability is an index value indicating the highest reliability among the index values of each data center stored in the data center information storage unit, and the index value indicating the low reliability is The index value indicating the lowest reliability among the index values of each data center stored in the data center information storage means may be used.

  According to the present invention, the capacity (file size) that can store a highly sensitive file for each storage requester is not fixedly set as in the prior art, but is set as a utilization ratio (confidence ratio). Therefore, it becomes possible to store files with high confidentiality at the same ratio regardless of the file size stored by the storage requester for the storage requesters with the same confidentiality.

  Also, unlike the prior art in which the capacity is fixedly set, there is no space in the area that can be stored as a highly sensitive file, and resources can be used effectively.

1 is an overall configuration diagram of a file storage system including a file storage control device 1 according to an embodiment of the present invention. 2 is a functional configuration diagram of a file storage control device 1. FIG. FIG. 4 is a diagram illustrating an example of information stored in a data center information storage unit 16. It is a figure which shows an example of the information stored in the storage requester information storage part. 4 is a diagram illustrating an example of information recorded in a file storage location information storage unit 18. FIG. It is a flowchart for demonstrating a new file storage destination selection process. It is a figure which shows the outline | summary of a new file storage destination selection process. It is a flowchart for demonstrating the selection process containing a data center archived file. It is a figure which shows the outline | summary of the selection process containing a data center archived file. It is a figure which shows the outline | summary of a re-storage process.

  Embodiments of the present invention will be described below with reference to the drawings.

(System configuration)
<Overall configuration>
FIG. 1 shows an overall configuration diagram of a file storage system including a file storage control device 1 according to an embodiment of the present invention.

  As shown in FIG. 1, a file storage control device 1 according to an embodiment of the present invention includes storage requester terminals A, B, and C used by company employees (storage requesters A, B, and C), It is connected to data centers X, Y, and Z for storing files via a network 20 (in this example, the Internet).

The configuration shown in FIG. 1 is based on the assumption that the file storage control device 1 is connected to a network 20 outside the company network. However, the file storage control device 1 is arranged in the company and the file storage is performed. The control device 1 and the storage requester terminals A, B, and C may be connected via a LAN in the company.
Each data center is a device such as a file server for storing files. For example, the data center may be installed in a company different from the company on the storage requester side, or may be installed in the company on the storage requester side. Each of the storage requester terminals A, B, and C is a general PC or the like.

<Configuration of File Storage Control Device 1>
FIG. 2 shows a functional configuration diagram of the file storage control device 1 according to the embodiment of the present invention. As shown in FIG. 2, the file storage control device 1 includes a storage requester terminal IF unit 11, a data center IF unit 12, a storage requester file temporary storage unit 13, a data center file temporary storage unit 14, and a storage destination. A selection processing unit 15, a data center information storage unit 16, a storage requester information storage unit 17, and a file storage destination information storage unit 18 are included.

  The storage requester terminal IF unit 11 has an IF (interface) function for performing communication such as file transmission / reception with the storage requester terminal (A, B, or C). A function for receiving a file storage start instruction from the client, and a function for transmitting a file storage completion message to the storage requester terminal.

  Further, the storage requester terminal IF unit 11 records the storage requester ID and password (referred to as authentication information) included in the login information received from the storage requester terminal in the storage requester information storage unit 17. It has an authentication function for authenticating the storage requester by collating it with the stored storage requester ID and password.

  The data center IF unit 12 has an IF function for performing communication such as file transmission / reception with the data center (X, Y, or Z). In addition, when the file storage format differs for each data center, the data center IF unit 12 changes the format appropriately according to each storage format and transmits / receives the file.

  The storage requester file temporary storage unit 13 is a storage unit for temporarily storing a file received from the storage requester terminal before selecting a file storage destination data center. The storage requester file temporary storage unit 13 is realized by a hard disk, a memory, or the like in the file storage control device 1. Further, the storage requester file temporary storage unit 13 has a folder (storage area) associated with the authentication information of the storage requester for each storage requester, and the storage request succeeded in the storage requester authentication. Only the user terminal is configured to be able to access the corresponding folder.

  The data center file temporary storage unit 14 is a storage unit that temporarily stores a file before storing the file in the data center. The data center file temporary storage unit 14 is realized by a hard disk, a memory, or the like in the file storage control device 1. In addition, a folder (storage area) is created for each data center in the data center file temporary storage unit 14, and each folder stores a file to be stored in the data center corresponding to the folder.

  The storage destination selection processing unit 15 is triggered by the file storage destination selection processing start instruction from the storage requester terminal IF unit 1 that has received the file storage start instruction from the storage requester terminal. The data center to be stored is selected based on the information stored in the data center information storage unit 16 and the information stored in the storage requester information storage unit 17 etc. The file is moved to the folder corresponding to the selected data center in the temporary file storage unit 14 for the center.

  The storage destination selection processing unit 15 also has a function of reading, recording, and updating information in the file storage destination information storage unit 18. The operation of the storage destination selection processing unit 15 will be described in detail later using a specific example.

  The data center information storage unit 16 stores data center information such as reliability necessary for selecting a data center.

  Information in the data center information storage unit 16 is recorded by an administrator of the file storage control device 1 or the like via a console terminal (not shown) connected to the file storage control device 1. Note that information such as reliability may be received from each data center via the Internet and each information may be automatically updated.

  The storage requester information storage unit 17 records authentication information (storage requester ID, password) for specifying the storage requester, and the confidentiality ratio set from the storage requester's department and job title information. .

  Each information in the storage requester information storage unit 17 is recorded by an administrator of the file storage control device 1 or the like via a console terminal (not shown) connected to the file storage control device 1. The information may be recorded from the storage requester terminal by a personnel information manager or the like of the company that uses the file storage control device 1.

  The file storage destination information storage unit 18 stores information (size, file name) related to the file stored in the data center, identification information of the storage destination data center, and storage date and time.

<Data Center Information Storage Unit 16>
FIG. 3 shows an example of information stored in the data center information storage unit 16. As shown in FIG. 3, the data center information storage unit 16 of this example records a storage fee and reliability for each data center.

  The storage fee is a fee for storing a file in the data center, which is calculated per unit period, per unit file size, or both. Further, as the reliability, it is recorded how many of the 10 levels are divided (the larger number is the higher reliability). For example, the reliability 10 is higher than the reliability 6. The reliability is evaluated and recorded in advance by an administrator of the file storage control device 1 based on information such as the scale of the data center operating company, the data center opening period, and company evaluation. In general, the higher the storage fee, the higher the reliability, so the storage fee can be used as the reliability.

  Note that the above reliability is relative. All of the data centers used in the present embodiment have practical security, and even if a highly confidential file is stored in a data center that is evaluated as having low reliability, it is normal. It is assumed that there is no particular problem with security in the operation of

<Storage requester information storage unit 17>
FIG. 4 shows an example of information stored in the storage requester information storage unit 17. As shown in FIG. 4, in the storage requester information storage unit 17 in this example, the storage requester ID, password, and confidentiality ratio are recorded for each storage requester.

  The confidentiality ratio is, for example, a value determined in advance according to the department or job title to which the storage requester belongs, and data with high reliability out of the total size of files that the corresponding storage requester wants to store. It is a value indicating the proportion of the size that can be stored in the center.

  For example, when the confidentiality ratio is determined according to the department, the human resources department is 100%, the secretary office is 100%, the accounting department is 90% The confidentiality ratio can be determined such that the department is 50% and the development department is 20%.

  In the case where the confidentiality ratio is determined according to the job title, the director is 100%, the department manager is 70%, the section manager is 40%, and the person in charge is 20% in the order that the possibility of handling highly confidential information is high. The density ratio can be determined such as%.

  Also, the confidentiality ratio may be determined according to both the department and the job title. In this case, for example, the confidentiality ratio determined according to the department to which the storage requester belongs and the job title of the storage requester. Of the determined confidentiality ratios, the higher confidentiality ratio can be set as the confidentiality ratio of the storage requester. For example, in the above example, when the department to which the storage requester belongs is “accounting department” and the title is “in charge”, the confidentiality ratio “90%” of the accounting department is set as the confidentiality ratio of the storage requester. Is done.

  The confidentiality ratio is not limited to the above, and can be arbitrarily set, and can be set by adding another group unit such as a project unit. In addition to the individual unit, the storage requester ID and password can be set for each department unit and project unit.

<File storage location information storage unit>
FIG. 5 shows an example of information recorded in the file storage location information storage unit 18. The information shown in FIG. 5 is information regarding the storage requester B as an example.

  As shown in FIG. 5, the file storage location information storage unit 18 stores the name of the stored file, the file size, the storage location data center, and the storage date and time. These pieces of information are recorded by the storage destination selection processing unit 15 based on the selection result of the file storage destination data center. It is desirable to record these information after confirming that the file has been normally stored in the data center.

  The file storage control device 1 having each function described above can be realized by mounting a program for performing processing corresponding to each function unit on a general computer including a storage unit such as a memory and a hard disk and a CPU. The program may be installed in the computer from a recording medium such as a portable memory or a disk, or may be downloaded from a server on a network to the computer and installed.

  Further, the internal functional classification of the file storage control device 1 according to the embodiment of the present invention is not limited to that shown in FIG. 2, and any function can be used as long as the operation shown in the present embodiment can be realized. Such functional division may be used.

(Operation of the file storage control device 1)
Hereinafter, the operation of the file storage control apparatus 1 having the above-described configuration will be described with reference to a flowchart and the like.

<New file storage destination selection process>
First, the new file storage destination selection process will be described with reference to the flowchart shown in FIG. In addition, FIG. 7 showing an outline of the processing is also referred to as appropriate.

  In the following processing, as an example, it is assumed that a storage requester B (a storage requester whose storage requester ID is B) newly requests a file storage.

  In addition, as the data center serving as a file storage destination, the data center having the highest reliability is used as the data center having high reliability, and the data center having the lowest reliability is used as the data center having low reliability. .

  Further, as a premise of the operation shown in the flowchart of FIG. 6, the file storage control device 1 has received access with authentication information from the storage requester terminal B, has succeeded in authentication, and the storage requester terminal B It is assumed that the storage target file is received, and the storage target file is stored in the corresponding folder of the storage requester file temporary storage unit 13. The files stored here are five files of file (A) to file (O) shown as new storage files in FIG. Note that. FIG. 7 also shows the size of each file.

  When the storage requester terminal IF unit 11 of the file storage control device 1 receives the file storage start instruction from the storage requester terminal B, the storage destination selection processing unit 15 receives the storage requester terminal IF unit 11 from the storage requester terminal IF unit 11. A storage destination selection process start instruction is received. Thereafter, the following processing is started.

  In step 1 of FIG. 6, the storage destination selection processing unit 15 calculates the total file size of the files to be stored stored in the corresponding folder in the temporary file storage unit 13 for the storage requester.

  As shown in FIG. 7, regarding the storage requester B, the storage requester file temporary storage unit 13 includes a file (A) (10M), a file (I) (20M), a file (U) (30M), a file Since (E) (40M) and five files (O) (50M) are stored, the total size is 150 Mbytes.

  Subsequently, in Step 2 of FIG. 6, the storage destination selection processing unit 15 acquires a confidentiality ratio corresponding to the storage requester ID of the corresponding storage requester B from the storage requester information storage unit 17, and By multiplying the density ratio and the total size, the total size of files that can be stored in a highly reliable data center (this is called a high-reliability data center file) (this is the file size ratio upper limit file size). Calculated). In this example, since the confidentiality ratio of the storage requester B is 60%, the confidentiality ratio upper limit file size is 150 × 0.6 = 90 Mbytes.

  Next, in step 3, the storage destination selection processing unit 15 selects a combination of files that does not exceed the confidentiality ratio upper limit file size and has the maximum total size from the files to be stored. In this example regarding the storage requester B, the combination of the file (A) (10M), the file (U) (30M), and the file (O) (50M) does not exceed the confidentiality ratio upper limit file size (90M). In addition, it corresponds to a combination of files having the maximum total size, and the combination is selected. These selected files are stored in a highly reliable data center. Files other than the above are (in this example, file (I) (20M) and file (e) (40M)), which are referred to as low reliability data center files). Will be stored. The outline of the processing here is as shown in FIG.

  In the example of the storage requester B, as a combination of files that do not exceed the upper limit size (90M) of the confidentiality ratio and have the maximum total size, the file (e) (40M) and the file (o) (50M) ), There are also combinations, so file (e) (40M) and file (o) (50M) are selected as files to be stored in a highly reliable data center, and are stored in a data center with low reliability. It is also possible to select a combination of file (A) (10M), file (I) (20M), and file (U) (30M).

  As described above, when there are a plurality of file combinations that do not exceed the confidentiality ratio upper limit file size and have the maximum total size, for example, a predetermined method such as selecting a file combination calculated first is used. You may select one combination. Further, the selection may be made by adding some conditions for the number of files. In this case, for example, the combination with the larger number of files is selected as the combination of files for the high reliability data center. When the number of files is the same, it is possible to add a condition such as including a file having the smallest file size.

  Note that the file combination method is to select and combine files in order from the smallest file size (in the above example, store file (A), file (I), file (U) in a highly reliable data center, File (e), file (o) are stored in a data center with low reliability), and conversely, files with the largest file size are selected and combined in the above order (in the above example, file (o), file (e) Can be stored in a data center with high reliability, and file (i), file (i), and file (a) can be stored in a data center with low reliability). Furthermore, among the selections from the small file order and the large file order, the one close to the file size ratio upper limit file size is selected (in the above example, the total size of the file (o) and file (e) is 90 MB, which is large). It may be selected from the order).

  Next, the storage destination selection processing unit 15 determines the data center X having the highest reliability and the data center Z having the lowest reliability among the data centers recorded in the data center information storage unit 16 (see FIG. 6), based on the selection result in step 4) and step 3, the file selected as the high reliability data center file is stored in the folder corresponding to the high reliability data center X in the data center file temporary storage unit 14. Store (step 5), and store other files in a folder of the data center Z with low reliability (step 6).

  The storage destination selection processing unit 15 stores the file in the data center temporary storage unit 14 and then instructs the data center IF unit 12 to store the file in each data center. The data center IF unit 12 receiving the storage instruction to the data center stores the file stored in the data center file temporary storage unit 14 by transmitting the file to the corresponding data center via the Internet 20. Execute.

  Subsequently, for example, after the file storage control device 1 receives a notification indicating that storage has been completed from each data center, the storage destination selection processing unit 15 stores the file stored in the file storage destination information storage unit 18. The file storage destination, storage date and time, and file information (file name, file size) are recorded (step 7). Further, the storage destination selection processing unit 15 instructs the storage requester terminal IF unit 11 to transmit to the storage requester that the storage is completed, and the storage requester terminal IF unit 11 that has received the instruction receives the corresponding storage request. Notify the user terminal of the completion of storage. In this example, the information shown in FIG. 5 is recorded by the process of step 7.

  In the above example, the files to be stored are classified into two stages: a high-reliability data center file and a low-reliability data center file, but it is classified into three or more stages (high, medium, low). However, it may be stored in a plurality of corresponding data centers. In the case of classification into two stages, for example, files for high reliability data centers are equally stored in a plurality of data centers having a reliability higher than a predetermined reliability, and are used for low reliability data centers. The file may be equally stored in a plurality of data centers having a reliability lower than a predetermined reliability. In this case, a plurality of data centers having a reliability higher than a predetermined reliability are collectively regarded as a data center having a high reliability described so far, and a plurality of data having a reliability lower than the predetermined reliability The centers can be collectively regarded as the data centers with low reliability described so far.

  In the above example, the reliability of the data center is associated with the confidentiality ratio. However, the storage fee of the data center, the communication speed, and the like may be associated with the confidentiality ratio. That is, for example, when the confidentiality ratio is 100%, it is possible to perform control such that all files are stored in a data center having a high storage fee.

<Selection processing including data center stored files>
In the new file storage destination selection process described above, a case has been described in which a file is not yet stored in the data center and a new file is stored in the data center. However, in the case where there is a file already stored in the data center, Further, when a file storage instruction is issued, not only an additional file but also a stored file is included, and a process of reselecting a data center as a file storage destination is performed based on the confidentiality ratio of the storage requester.

  Hereinafter, data center selection processing when there is a file already stored in the data center will be described with reference to the flowchart of FIG. Further, FIG. 9 showing an outline of the processing will be referred to as appropriate.

  In the following, an example will be described in which two files (file (ka) (80M), file (ki) (100M)) are added as files to be stored after the above-mentioned new file storage processing of the client B. As a premise of the following processing, login authentication from the storage requester terminal B is completed, and the two files (file (ka) (80M), file (ki)) (100M) according to an instruction from the storage requester terminal B. )) Is stored in the terminal file temporary storage unit 13 for the storage requester, and the file storage destination information storage unit 18 stores information on the five files already stored in the data center as shown in FIG. Is described.

  When the storage requester terminal IF unit 11 of the file storage control device 1 receives the file storage start instruction from the storage requester terminal B, the storage destination selection processing unit 15 receives the storage requester terminal IF unit 11 from the storage requester terminal IF unit 11. A storage destination selection process start instruction is received. Thereafter, the following processing is started.

  In step 21 in FIG. 8, the storage destination selection processing unit 15 stores the total size of the files to be stored stored in the corresponding folder of the temporary file storage unit 13 for the storage requester and the file storage destination information storage unit 18. Calculate the total with the total size of the file recorded as a completed file. As shown in FIG. 9, in this example, this total size is 330M.

  Subsequently, in step 22 in FIG. 8, the storage destination selection processing unit 15 acquires the confidentiality ratio corresponding to the storage requester ID of the corresponding storage requester B from the storage requester information storage unit 17, and By multiplying the density ratio by the above-mentioned total, the total size (file density ratio upper limit file size) of files that can be stored in a highly reliable data center (high reliability data center file) is calculated. In this example, 0.6 × 330 = 198M.

  Next, in step 23, the storage destination selection processing unit 15 does not exceed the confidentiality ratio upper limit file size (198M) from among the target files (newly stored files and already stored files), and Select the file combination that maximizes the total size.

  In this example, a file (A) (10M), a file (I) (20M), and a file (U) are combinations of files that do not exceed the confidentiality ratio upper limit file size (198M) and have the maximum total size. A combination of (30M), file (O) (50M), and file (ka) (80M) is selected. As a result, the low-reliability data center file is a combination of file (e) (40M) and file (ki) (100M). This process is as shown in FIG.

  In step 24 of FIG. 8, the storage destination selection processing unit 15 determines whether the data center already stored in the files stored in the data center and the storage destination data center corresponding to the file selection result in step 23 are the same. It is determined whether there is a different file, and if there is, the process proceeds to the re-storing process in step 25.

  In the re-storing process, a file that is different from the data center that is already stored and the storage data center in the file selection result is acquired from the already stored data center (deleted from the already stored data center) This is a process of storing the file in the storage requester file temporary storage unit 13 of the file storage control apparatus 1.

  The outline of this process is as shown in FIG. In this example, the file (I) (20M) is the target of the re-storage process, and as shown in FIG. 10, the file (I) (20M) is transferred from the data center Z to the temporary file storage unit for the storage requester. 13 is moved.

  More specifically, in the re-storage process in step 25 of FIG. 8, the storage destination selection processing unit 15 sends the storage requester ID (B in this example) and target file information (file in this example) to the data center IF unit 11. The acquisition of the target file from the data center is instructed together with information on the name (i) and the storage destination data center Z).

  Upon receiving the instruction, the data center IF unit 11 acquires the target file from the instructed data center, and acquires the target file in the corresponding folder of the storage requester file temporary storage unit 13 specified based on the storage requester ID. Save the file. Thereafter, the data center IF unit 11 instructs the storage destination selection processing unit 15 to continue processing. As a result, the re-storing process ends.

  Next, among the files already stored in the data center, if there is no file that is different from the data center already stored and the storage destination data center in the file selection result in step 23, or the re-storage process is completed. In this case, the storage destination selection processing unit 15 determines the data center X having the highest reliability and the data center Z having the lowest reliability among the data centers recorded in the data center information storage unit 16 (see FIG. 8 step 26), the file selected as the high-reliability data center file is stored in the folder corresponding to the high-reliability data center X in the temporary data center file storage unit 14 (step 27). The file is stored in the folder of the data center Z with low reliability (step 28). This process is also shown in FIG.

  Note that files that have already been stored in the data center and do not need to be stored again are not stored in the temporary storage unit for data center 14 because there is no file in the temporary file storage unit for storage requester 13.

  The storage destination selection processing unit 15 stores the file in the data center temporary storage unit 14 and then instructs the data center IF unit 12 to store the file in each data center. The data center IF unit 12 receiving the storage instruction to the data center stores the file stored in the data center file temporary storage unit 14 by transmitting the file to the corresponding data center via the Internet 20. Execute.

  Subsequently, for example, after the file storage control device 1 receives a notification indicating that storage has been completed from each data center, the storage destination selection processing unit 15 stores the file stored in the file storage destination information storage unit 18. The file storage destination, storage date and time, and file information (file name, file size) are recorded (step 29). In the case of a file that has already been recorded, the file storage location and storage date / time are updated. Further, the storage destination selection processing unit 15 instructs the storage requester terminal IF unit 11 to transmit to the storage requester that the storage is completed, and the storage requester terminal IF unit 11 that has received the instruction receives the corresponding storage request. Notify the user terminal of the completion of storage.

  By such processing, in this example, information as shown in FIG. 10 is stored in the data center X and the data center Z.

  In the above file selection process, in order to reduce the communication fee associated with the re-storage, the combination of not performing the re-storage process (or reducing the number of files to be stored again) may be selected with priority. Furthermore, in order to reduce the need for re-storing processing, the range of file combinations that do not require re-storing processing is increased by giving a certain range (± 10%, etc.) to the density ratio. Also good.

(Other examples)
In the examples described so far, it is assumed that the confidentiality ratio stored in the storage requester information storage unit 17 is not changed, but in reality, the confidentiality ratio is changed due to personnel changes or the like. Occurs. In such a case, the selection process in the case of including the data center stored file described above may be performed based on the changed confidentiality ratio. In this case, the processing content is the same as the selection processing described above except that there is no additional file.

  For example, when the confidentiality ratio of the storage requester information storage unit 17 is changed due to personnel changes, the personnel officer of the company that has changed the confidentiality ratio sends the file storage control device 1 to the storage requester ID unit. The file storage control device 1 performs the selection process including the data center stored file using the instruction as a trigger, and the file storage according to the changed confidentiality ratio can be realized.

  It is also possible not to change the confidentiality ratio due to personnel changes, and to share the user ID for each department so that it will not be affected by personnel changes, and to set the confidentiality ratio for each department and store the file It is good.

  The present invention is not limited to the above-described embodiments, and various modifications and applications are possible within the scope of the claims.

1 File storage control device A, B, C Storage requester terminal X, Y, Z Data center 20 Network 11 Storage requester terminal IF unit 12 Data center IF unit 13 Storage requester file temporary storage unit 14 For data center Temporary file storage unit 15 Storage destination selection processing unit 16 Data center information storage unit 17 Storage requester information storage unit 18 File storage destination information storage unit

Claims (5)

A file storage control device connected to a storage requester terminal and a plurality of data centers via a communication network,
Storage requester information storage means for storing the confidentiality ratio for each storage requester;
Data center information storage means for storing an index value indicating the reliability of the data center for each data center;
A storage target file storage means for temporarily storing one or a plurality of files to be stored in the data center for each storage requester;
With respect to the storage requester corresponding to the storage requester identification information received from the storage requester terminal, the total file size of the files stored in the storage target file storage unit is calculated, and the total file size and the sensitivity By multiplying the ratio, the confidentiality ratio upper limit file size is calculated, and the combination of the files whose total file size does not exceed the confidentiality ratio upper limit file size is stored in the storage target file storage means. File selection means to select from the selected file,
The file selected by the file selection means is stored in a data center corresponding to an index value indicating high reliability, and the file selected by the file selection means among the files stored in the storage target file storage means A file storage control device comprising: storage processing means for storing other files in a data center corresponding to an index value indicating low reliability. The file storage control device includes file storage destination information storage means for storing a file name, a file size, and identification information of a storage destination data center of a file already stored in the data center,
When there is a file already stored in the data center for the storage requester,
The file selection means calculates the sum of the file sizes of the files stored in the storage target file storage means and the file sizes of the files already stored in the data center. The density ratio upper limit file size is calculated by multiplying by the density ratio, and the combination of files in which the total file size is the maximum without exceeding the density ratio upper limit file size is stored in the storage target file storage means. Selected from the recorded file and the file recorded in the file storage location information storage means,
The storage processing unit stores the file selected by the file selection unit in a data center corresponding to an index value indicating high reliability, the file stored in the storage target file storage unit, and the file storage destination 2. The file recorded in the information storage unit, other than the file selected by the file selection unit, is stored in a data center corresponding to an index value indicating low reliability. The file storage control device described in 1. Among the files selected by the file selection means, when there is a file in which the data center already stored is different from the storage destination data center determined by the file selection,
The file selection means acquires the different file from the already stored data center and stores it in the storage target file storage means, and the storage processing means determines the acquired file by the file selection. The file storage control device according to claim 2, wherein the file storage control device is stored in a determined storage destination data center. The index value indicating the high reliability is an index value indicating the highest reliability among the index values of each data center stored in the data center information storage unit, and the index value indicating the low reliability is The file storage according to any one of claims 1 to 3, wherein the index value indicates the lowest reliability among the index values of each data center stored in the data center information storage means. Control device. A program for causing a computer to function as a file storage control device connected to a storage requester terminal and a plurality of data centers via a communication network,
The computer
Storage requester information storage means for storing the confidentiality ratio for each storage requester;
Data center information storage means for storing an index value indicating the reliability of the data center for each data center;
A storage target file storage means for temporarily storing one or a plurality of files to be stored in the data center for each storage requester;
Comprising the computer,
With respect to the storage requester corresponding to the storage requester identification information received from the storage requester terminal, the total file size of the files stored in the storage target file storage unit is calculated, and the total file size and the sensitivity By multiplying the ratio, the confidentiality ratio upper limit file size is calculated, and the combination of the files whose total file size does not exceed the confidentiality ratio upper limit file size is stored in the storage target file storage means. File selection means to select from
The file selected by the file selection means is stored in a data center corresponding to an index value indicating high reliability, and the file selected by the file selection means among the files stored in the storage target file storage means Storage processing means for storing files other than those in the data center corresponding to the index value indicating low reliability,
Program to function as.

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