JP6305177B2 - Information processing apparatus, document management system, information processing method, and program - Google Patents

Description

  The present invention relates to an information processing apparatus, a document management system, an information processing method, and a program.

In a document management system, storage is often divided and managed in order to limit the use capacity of the storage or customize it according to access control or use method. The name of this classification differs depending on the system, and for example, names such as cabinets and libraries are used (hereinafter referred to as cabinets).
The cabinet attribute information includes a cabinet capacity that defines the storage capacity that can be used by the cabinet, and a used capacity that indicates the storage capacity actually used by the cabinet. The cabinet capacity and the used capacity are held for checking that a document file is not registered exceeding the upper limit of use or for allowing the user to immediately confirm the status of the cabinet.
The used capacity changes each time a document file is registered, updated, or deleted, and the time lag is not acceptable. For this reason, it is calculated each time a document file is registered, updated, or deleted, and the value is updated (see, for example, Patent Document 1).

JP 2003-316624 A

Hereinafter, an example of a document management system will be described with reference to FIGS.
FIG. 1 is a diagram showing the data structure of the document management system as an image. A tenant 300 indicates a boundary of data mainly used in a cloud type system or the like. In the cloud system, a multi-tenant method is used in which multiple companies and users coexist in one system environment. In order to avoid mixing the data of each company and users, a logical system for each company and user is used. There are boundaries (logical boundaries between tenants). For example, the boundary 300 indicates a tenant logical boundary. The resources (calculation capacity, storage capacity, etc.) that each tenant can use depend on the contract between the company providing the cloud service and each tenant. In document management systems, storage is often divided and managed within each tenant in order to limit the storage usage capacity and customize it according to access control and usage methods. It is a cabinet. Boundaries 301, 302, and 303 indicate cabinet boundaries. A large number of folders 311 and document files 321 exist in the cabinet. A plurality of users or systems access folders and files in the cabinet. In the document management system, a storage capacity can be allocated for each cabinet. For example, when a company uses a cloud service document management system as a tenant, it is possible to create a cabinet for each department in the tenant and allocate storage usable capacity to each cabinet of each department.

  FIG. 2 is a diagram illustrating an example of a table on the database (hereinafter referred to as a table) that stores cabinet attribute information. The tenant ID column 401 is an ID for identifying the tenant indicated by 300 in FIG. The cabinet ID column 402 is an ID for identifying a cabinet in the tenant indicated by 301, 302, and 303 in FIG. The tenant ID column 401 and the cabinet ID column 402 identify a unique cabinet in the system. The maximum size column 403 is a column for storing the cabinet capacity indicating the usable capacity of the storage. The used capacity column 404 is a column for storing the used capacity of the cabinet. The value of the used capacity column 404 changes every time processing such as registration, update, and deletion of a document file is performed. The cabinet attribute information table is also referred to and updated when managing the cabinet attribute information.

  FIG. 3 is a flowchart showing an example of the document file update process. First, when a document file to be updated is uploaded from the client terminal, the application program of the document management system is called by the CPU. The application program is read from the storage device, stored in the memory, and then executed by the CPU. The CPU first receives the uploaded document file (S501). Here, the CPU acquires information of an existing document in the document management system before overwriting the document file by updating the document file (S502). Thereafter, the document file is updated (S503). More specifically, in step S503, the CPU stores the document file in the storage device, stores related attribute information in the database, and deletes the existing document file. Then, the CPU calculates the increase / decrease of the file size from the information of the existing document file acquired in S502 and the information of the uploaded updated document file (S504). The increase / decrease of the file size may increase the positive value, that is, the file size, or may decrease the negative value, that is, the file size. Then, the CPU determines whether or not the file size has increased (S505). If the file size has increased, the CPU calculates and acquires the free space of the cabinet from the cabinet attribute information table of FIG. 2 (S506). The CPU calculates the free capacity by subtracting the value in the used capacity column 404 from the value in the maximum size column 403. Then, the CPU determines whether or not there is a free capacity for storing the document file in the cabinet (S507). The determination process determines whether or not the increase amount of the file size calculated in S504 fits within the free space acquired in S506. If the file size decreases in S505, S506 and S507 need to be performed. No. If there is free space, the CPU updates the value in the used capacity column 404 of the cabinet attribute information table (S508), and commits the database update process (S509). If there is no free space, the CPU discards the database update process and returns to the state before update based on the information of the existing document acquired in S502 (S510).

  Although the document file update processing has been described here, similar processing is performed for document file registration processing and document file deletion processing. When the document file is registered, the file size always increases, and when the document file is deleted, the file size always decreases, and the used capacity update process as in S508 is performed. When version management is performed on the document file, the CPU 102 calculates the increase / decrease in the file size in consideration of the upper limit number of versions to be stored.

  As shown in FIG. 1, there are many document files in the cabinet, and a plurality of users and systems access them. On the other hand, the used capacity of the cabinet is managed by a database and is an attribute associated with the cabinet, and is therefore stored centrally using a cabinet attribute information table as shown in FIG. As shown in FIG. 3, since the registration, update, and deletion processing of the document file affects the used capacity of the cabinet, it is necessary to update the used capacity information of the cabinet each time. For this reason, when access is concentrated, document file registration, update, and deletion processing are simultaneously performed, and usage capacity update processing as shown in S508 of FIG. In such a case, when a process locks a record to update the used capacity information of the database, other processes wait for the lock to be released. As a result, there arises a problem that the performance of document file registration, update, and deletion processing deteriorates.

  An object of the present invention is to make it possible to update or check a free capacity or a used capacity without degrading the performance of registration, update, and deletion processing of a document file.

  Therefore, the information processing apparatus according to the present invention includes a registration unit that registers a record relating to the usable capacity of the storage and an increase / decrease record indicating an increase / decrease in the used capacity of the storage related to the operation processing of the document file, Free space acquisition means for adding up a plurality of records registered by the registration means and acquiring the free capacity of the storage.

  According to the present invention, it is possible to update or check the free space or the used space without degrading the performance of document file registration, update, and deletion processing.

It is the figure which showed the data structure of the document management system with the image. It is a figure which shows an example of the table on the database which stores the attribute information of a cabinet. It is a flowchart which shows an example of a document file update process. It is a figure which shows an example of the hardware constitutions of information processing apparatus. It is a figure which shows an example of a system configuration. It is a figure which shows an example of the software configuration of a document management system. It is a figure which shows an example of the table which stores cabinet attribute information. It is a figure which shows an example of the table which stores the empty capacity | capacitance of a cabinet. It is a figure which shows an example which added the increase / decrease record of the free space to the free space table. It is a flowchart of a document file update process. It is a figure which shows an example of the SQL sentence at the time of calculating the free space of a cabinet. It is a flowchart which shows an example of a cabinet capacity | capacitance change process. It is a flowchart which shows an example of a cabinet use capacity calculation process. It is a flowchart which shows an example of the increase / decrease record merge process of free capacity. It is a figure which shows an example of the free space table after the increase / decrease record of free space.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 4 is a diagram illustrating an example of a hardware configuration of the information processing apparatus. The information processing apparatus includes a CPU 102, a memory 103, a storage device 104, a video interface 105, an input / output (hereinafter referred to as I / O) interface 106, and a communication interface 107. In addition, each component in the information processing apparatus is connected to each other via the system bus 101. The CPU 102 is a central processing unit that controls each component via the system bus 101 and performs data calculation and processing. The memory 103 is a device that stores data and programs, and includes a RAM (Random Access Memory) and a ROM (Read Only Memory). The storage device 104 writes / reads stored data. The storage device 104 includes a hard disk drive (HDD) 111, a CD-ROM drive 112 used as a nonvolatile data source, and a flexible disk drive (FDD) 113. Although not shown in FIG. 4, a magnetic tape drive, DVD-ROM, USB memory, or the like may be used as the storage device 104.
The program according to the present embodiment is read from the storage device 104, stored in the memory 103, and executed by the CPU 102. In this embodiment, the program is read from the storage device 104. However, the program may be read from the ROM or read from the outside via the communication interface 107. When the CPU 102 executes processing based on the program, the functions of the information processing apparatus and the processing of the flowchart described below are realized.

The video interface 105 controls display output to the display device 114. Some display devices 114 use a CRT, liquid crystal display, or the like. Input devices such as a keyboard 115 and a pointing device 116 are connected to the I / O interface 106. The operator issues an operation command to the information processing apparatus by operating the keyboard 115. The pointing device 116 moves the cursor on the display device 114 in accordance with an operation by the operator, and performs selection and operation of menus and objects. In addition, some display devices 114 can input operations using a touch panel or the like. In this case, the display device 114 serves as both an output device and an input device.
The communication interface 107 communicates with an external device through the network 117. The network includes a public line such as a LAN, a WAN, and the Internet. The communication interface 107 also communicates with other devices such as the local printer 118.

  FIG. 5 is a diagram illustrating an example of a system configuration. Connected to the network 201 are a server computer (hereinafter referred to as a server) 202, a client personal computer (hereinafter referred to as a client terminal) 203, and a tablet terminal 204. Examples of the network 201 include a LAN, a WAN, and the Internet. Client terminals such as the client terminal 203 and the tablet terminal 204 communicate with the server 202 through the network 201. In this embodiment, the client terminal 203, the tablet terminal 204, and the server 202 all have the configuration of the information processing apparatus shown in FIG. However, it is not limited to the configuration of FIG. 4 and may have other functions. The server 202 is not limited to a single computer but may be a rack mount system.

The document management system according to the present embodiment is assumed to operate in the server 202 and access data on the server from a client terminal such as the client terminal 203 or the tablet terminal 204. However, there may be a form in which the document management system shares processing with the server 202 and the client terminal 203 or 204.
Here, the document management system means a system on a computer that mainly stores and manages electronic documents and digitized paper documents. In the document management system, electronic documents and digitized paper documents are stored in a file format on a computer. Accordingly, the electronic document handled by the document management system is not limited to document content using characters, but includes all data stored in a file format, such as image and video content (hereinafter referred to as an electronic document stored in a file format). File).
In an example of a form in which the document management system according to the present embodiment operates on the server 202, a server application such as a database, an application server, or a Web server is installed on the server 202. A Web browser or a dedicated client application is installed on the client terminals 203 and 204. When a data acquisition request is transmitted from the client terminals 203 and 204 to the server 202, the Web server on the server 202 receives the request from the client terminal. Then, the application server interprets the request contents and acquires necessary data from the database. Then, the application server transmits the acquired data to the client terminals 203 and 204 through the Web server. In the client terminals 203 and 204, when the data is received, the Web browser or a dedicated client application displays the acquired data on the display device 114 of the client terminal.

  FIG. 6 is a diagram illustrating an example of a software configuration of the document management system. The request reception / response transmission unit 601 performs processing for receiving a request from the client terminals 203 and 204 and response processing for transmitting a response to the client terminals 203 and 204. The cabinet management unit 602 performs reference and editing processing related to the cabinet received from the request reception / response transmission unit 601. The document file / folder management unit 603 performs reference, registration, update, deletion processing, and the like regarding the folder and document file received from the request reception / response transmission unit 601. The database access unit 604 performs processing such as database reference, registration, update, and deletion processing based on the processing contents of the cabinet management unit 602 and the document file / folder management unit 603. The merge processing unit 605 performs record merging processing (merging processing).

  FIG. 7 is a diagram illustrating an example of a table (cabinet attribute information table) for storing cabinet attribute information. The tenant ID column 701 is an ID for identifying the tenant indicated by 300 in FIG. The cabinet ID column 702 is an ID for identifying a cabinet in the tenant indicated by 301, 302, and 303 in FIG. The tenant ID column 701 and the cabinet ID column 702 identify a unique cabinet in the system. The maximum size column 703 is a column for storing cabinet capacity. Columns 701, 702, and 703 are the same as columns 401, 402, and 403 in FIG. However, the used capacity column 404 in FIG. 2 is not in the cabinet attribute information table in FIG. 7 but stores contents corresponding to a table (free capacity table in FIG. 8) for storing information on free capacity.

  FIG. 8 is a diagram illustrating an example of a table (free capacity table) that stores information related to the free capacity of the cabinet. A tenant ID column 801 is an ID for identifying a tenant. A cabinet ID column 802 is an ID for identifying a cabinet. Similar to the cabinet attribute information table of FIG. 7, a unique cabinet in the system is specified by the tenant ID column 801 and the cabinet ID column 802. The data type column 803 is a column indicating the record type of the free capacity table. A record with a record type of 0 indicates that it is a record serving as a base of a value indicating a free capacity. A record whose record type is 0 always exists in each cabinet, and does not become a plurality of records. The free capacity column 804 is a column for storing the free capacity of the cabinet. Although the used capacity is stored in FIG. 2, in the document file registration, update, and deletion processing, as shown in S506 of FIG. Therefore, the free space is stored in the free space column 804.

  FIG. 9 is a diagram showing an example in which a free space increase / decrease record is added to the free space table of FIG. Each column of the table is the same as in FIG. The record 901 is a record serving as a base of the free capacity as shown in FIG. A record 902 indicates a record to be inserted when a document file is registered or updated. The record type stored in the data type column 803 of the record 902 is 2, which indicates that the record indicates increase / decrease in the document file. The value -6530 of the record 902 stored in the free capacity column 804 means that the file size has increased by 6530 bytes and the free capacity has decreased by 6530 bytes by registering or updating the document file. A record 903 indicates a record to be inserted when a document file is deleted or updated. The value 1000 of the record 903 stored in the free space column 804 means that the file size has decreased by 1000 bytes and the free space has increased by 1000 bytes due to deletion or update of the document file. A record 904 indicates a record to be inserted when the capacity allocated to the cabinet is changed. The record type stored in the data type column 803 is 1, which indicates that the record indicates an increase or decrease in storage capacity allocated to the cabinet. When the cabinet capacity is changed, the maximum size column 703 in FIG. 7 is changed, and the increased / decreased value of the changed cabinet capacity is also inserted into the free capacity table. A value 2,000,000 of the record 904 stored in the free capacity column 804 means that the free capacity has increased by 2 million bytes as the maximum storage capacity of the cabinet has increased by 2000000 bytes.

FIG. 10 is a flowchart of the document file update process. The rough processing flow is the same as that in the example of the document file update process in FIG. 3, but a process for acquiring the free space of the cabinet described later (S1006) and a process for inserting the increase / decrease records in the free capacity table (S1008) And the contents are different.
In FIG. 10, first, when a document file to be updated is uploaded from the client terminals 203 and 204, the application program of the document management system is called by the CPU 102. The application program is read from the storage device 104, stored in the memory 103, and then executed by the CPU.
First, the request reception / response transmission unit 601 receives an uploaded document file (S1001). The document file / folder management unit 603 acquires information of an existing document file before the document file is overwritten by the document file update (S1002), and updates the document file (S1003). More specifically, in step S1003, the document file / folder management unit 603 stores the document file in the storage device 104, stores related attribute information in the database, and deletes the existing document file. Then, the document file / folder management unit 603 calculates the increase / decrease of the file size from the information of the existing document file acquired in S1002 and the information of the updated updated document file (S1004). The increase or decrease of the file size may be a positive value, that is, the file size may be increased, or a negative value, that is, the file size may be decreased. The document file / folder management unit 603 determines whether the file size has increased (S1005). If the number has increased, the cabinet management unit 602 acquires the free space of the cabinet from the free space table in FIG. 9 (S1006). As shown in FIG. 9, in the free space table, records that serve as bases of free space for each cabinet (records related to increase / decrease in the maximum storage capacity allocated to each cabinet) 901, 904, and addition / change of document files There are records 902 and 903 indicating the increase / decrease in capacity due to deletion. Therefore, the free space of the cabinet is the sum of them. The record related to the increase or decrease of the maximum storage capacity allocated to each cabinet is an example of the record related to the usable capacity of the storage. A record indicating increase / decrease in capacity due to addition / change / deletion of a document file is an example of an increase / decrease record indicating increase / decrease in storage usage capacity related to operation processing of a document file.

  FIG. 11 shows an example of an SQL statement when the cabinet management unit 602 calculates the free space of the cabinet in step S1006. CABINET_SPACE in the SQL statement 1101 in FIG. 11 is the table name of the free capacity table. Therefore, the SQL statement 1101 indicates that the free capacity values of the records related to the cabinet set from the free capacity table are added and acquired. Regardless of the data type column 803, the cabinet management unit 602 can obtain the free space of the cabinet by adding up the values of the free space column 804 of the record corresponding to the set cabinet to obtain the total value. it can.

  Returning to the description of FIG. 10, the document file / folder management unit 603 determines whether or not there is a free space in the cabinet that can store the document file (S1007). The determination process is to determine whether or not the increase amount of the file size calculated in S1004 fits in the free space of the cabinet calculated and acquired in S1006. If the file size decreases in S1005, S1006 and S1007 are determined. There is no need to do. If it is determined in S1007 that there is free space, the cabinet management unit 602 inserts a record for increasing / decreasing the capacity due to addition / change / deletion of the document file into the free space table (S1008), and commits the database update processing (S1009). ). The record inserted in S1008 has a negative value as shown in the record 902 in FIG. 9 when the file size increases, and a positive value such as the record 903 in FIG. 9 when the file size decreases. . If it is determined in step S1007 that there is no free space, the document file / folder management unit 603 discards the database update processing (S1010). In the processing of the above flowchart, the database access unit 604 accesses the database. The request reception / response transmission unit 601, the cabinet management unit 602, and the document file / folder management unit 603 use the database access unit 604 to access the database.

Although the document file update processing has been described here, similar processing is performed for document file registration processing and document file deletion processing. The file size always increases in the registration of the document file, and the file size always decreases in the deletion process of the document file, and the insertion process of the free space increase / decrease record as in S1008 is performed. Further, when version management is performed on a document file, the document file / folder management unit 603 calculates the increase / decrease of the file size in consideration of the upper limit number of versions to be stored.
As described above, the processing performed in step S1008 is processing for inserting a record for increasing / decreasing the capacity by adding / changing / deleting a document file into the table, unlike step S508 in FIG. Therefore, there is no waiting for a record to be unlocked, and the performance of document file registration, update, and deletion processing does not deteriorate.

FIG. 12 is a flowchart illustrating an example of the cabinet capacity changing process. The cabinet capacity change process is executed by the cabinet management unit 602 in FIG. 6, and the database processing is executed by the database access unit 604. Even when the cabinet capacity is changed, the available capacity of the cabinet is changed, so it is necessary to manage the available capacity. In FIG. 12, first, the cabinet management unit 602 acquires and locks the record of the cabinet attribute information table shown in FIG. 7 (S1201). The reason for locking the record is that an exclusive process is required to avoid inconsistency when the process of updating the cabinet attribute information is performed at the same time. The cabinet management unit 602 determines whether or not the record is locked (S1202), and returns an exclusive error if the record cannot be locked (S1203). When the cabinet management unit 602 can lock, the cabinet management unit 602 determines whether the change size is a positive value, that is, the capacity is increased, or the change size is a negative value, that is, the capacity is decreased (S1204). If the changed size is a positive value, the cabinet management unit 602 proceeds to step S1208. If the change size is a negative value, the cabinet management unit 602 acquires the current cabinet free space from the free space table (S1205). The free space acquisition process is the same as the process in step S1006 of FIG. Then, the cabinet management unit 602 compares the absolute value of the changed size, that is, the decreasing size with the free capacity (S1206). If the size to be reduced is larger than the free capacity, the cabinet management unit 602 sets an unrenewable error because the cabinet capacity becomes smaller than the used capacity (S1207). If the size to be reduced is smaller than the free space, the cabinet management unit 602 proceeds to S1208. In S1208, the cabinet management unit 602 adds the value of the maximum size column 703 of the cabinet attribute information table acquired in S1201 and the changed size, and uses the summed value as the value of the maximum size column 703 of the cabinet attribute information table. Update. Next, the cabinet management unit 602 inserts an increase / decrease record in the free capacity table (S1209) and commits the update process to the database (S1210). In step S1209, a record such as record 904 in FIG. 9 is inserted.
As described above, in the cabinet capacity changing process, the free capacity is changed by inserting a record as in step S1209. Therefore, there is no waiting for unlocking the record in the free capacity table, and document file registration, update, and deletion processes are performed. The performance does not decrease. Further, the cabinet attribute information table does not need to be referred to in document file registration, update, and deletion processing, and therefore does not affect performance.

  FIG. 13 is a flowchart illustrating an example of cabinet usage capacity calculation processing. The cabinet usage capacity calculation process is executed by the cabinet management unit 602 in FIG. 6, and the database access process is executed by the database access unit 604. Since the used capacity column 404 in the cabinet attribute information table shown in FIG. 2 is changed to the free capacity column 804 in the free capacity table shown in FIG. 8, the cabinet management unit 602 calculates the used capacity from the cabinet capacity. The free space will be subtracted. In S1301, the cabinet management unit 602 acquires the free space of the cabinet from the free space table. This process is the same as step S1006 in FIG. In step S1302, the cabinet management unit 602 acquires the cabinet capacity from the maximum size column 703 of the cabinet attribute information table. In step S1303, the cabinet management unit 602 subtracts the free capacity from the cabinet capacity to obtain the used capacity (used capacity acquisition).

  The free space increase / decrease record merge processing will be described with reference to FIGS. As described in step S1008 in FIG. 9 and FIG. 10 and step S1209 in FIG. 12, when the free space has increased or decreased, the increase / decrease record is inserted into the free space table. Since the free space acquisition is performed by the SQL statement 1101 in FIG. 11, the performance of the free space acquisition processing hardly deteriorates even if there are many increase / decrease records. However, if the document management system continues to be operated and the number of increase / decrease records becomes enormous, the performance of the free space calculation process may be reduced. For this reason, a process for periodically reducing the increase / decrease record is required.

  FIG. 14 is a flowchart illustrating an example of the free space increase / decrease record merging process. The increase / decrease record merging process is executed by the merge processing unit 605 in FIG. However, specifically, the free space table update process is executed by the cabinet management unit 602. Database processing is executed by the database access unit 604. In FIG. 14, the merge processing unit 605 locks the record to be updated in the free capacity table (S1401), and determines whether the lock is successful (S1402). If the lock fails, the merge processing unit 605 sets an exclusive error (S1403). If the lock is successful, the merge processing unit 605 acquires the free space of the cabinet from the free space table (S1404). This process is the same as step S1006 in FIG. Next, the merge processing unit 605 updates the record serving as the base of the free space table with the free space value acquired in step S1404 (S1405). The base record is a record whose value in the data type column 803 described in FIG. 8 is 0, and the merge processing unit 605 updates the value in the free capacity column 804 of this record. Then, the merge processing unit 605 deletes the increase / decrease record in the free capacity table (S1406). The increase / decrease record is a record whose value of the data type column 803 described with reference to FIG. Finally, the merge processing unit 605 commits the database update process (S1407).

FIG. 15 is a diagram illustrating an example of a free space table after merged records of free space increase / decrease. The contents of the free capacity table of FIG. 15 are the contents obtained by merging the increase / decrease records of the free capacity table shown in FIG. 9 with the base records. A record 1501 is a base record, and the free capacity acquired in step S1404 is stored as the value 11976310 of the free capacity column 804 of the record 1501. A dotted line 1502 indicates the deleted record. The values of the increase / decrease records in FIG. 9 are aggregated and deleted in the base record.
The merge processing unit 605 in FIG. 6 performs the free space increase / decrease record merge processing shown in FIGS. 14 and 15, and various methods can be considered as the execution method of the merge processing unit 605. For example, when the merge process is executed periodically by specifying the time or interval of the scheduler, or when the number of increase / decrease records is regularly checked or the number of document file update processes is counted to exceed the predetermined number There is a method for executing merge processing. Furthermore, there is a method of performing the cabinet capacity changing process of FIG. 13 such as the cabinet capacity changing process of FIG. 12 or the reference of the used capacity.
As described above, the used capacity of the cabinet can be updated or confirmed without degrading the performance of document file registration, update, and deletion processing.
In this embodiment, the table for managing the free capacity is used as shown in FIGS. 8 and 9, but a table for managing the used capacity may be used.

<Other embodiments>
The present invention supplies a program that realizes one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program This process can be realized. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

102 CPU, 202 server computer

Claims (10)

Registration means for registering a record relating to the usable capacity of the storage and an increase / decrease record indicating an increase / decrease in the used capacity of the storage related to the operation processing of the document file in the free capacity table;
Free space acquisition means for adding up a plurality of records registered by the registration means and acquiring the free capacity of the storage;
An information processing apparatus.   The information processing according to claim 1, further comprising: a used capacity acquisition unit configured to acquire a used capacity of the storage based on a cabinet capacity indicating the usable capacity of the storage and the free capacity acquired by the free capacity acquisition unit. apparatus.   The information processing apparatus according to claim 1, wherein the document file operation process is a document file registration process, the document file update process, or the document file deletion process.   The information processing apparatus according to claim 1, further comprising a merging unit that merges a plurality of increase / decrease records included in the free capacity table into a base record and deletes the plurality of increase / decrease records.   The merging means locks a plurality of increase / decrease records to be included in the free capacity table, and when the lock is successful, merges the plurality of increase / decrease records to be a base record, The information processing apparatus according to claim 4, wherein the increase / decrease record is deleted from the free capacity table. A registration means for registering an increase / decrease record related to the usable capacity of the storage and an increase / decrease record indicating increase / decrease of the used capacity of the storage related to the operation processing of the document file in the free capacity table;
Free capacity acquisition means for adding up the plurality of increase / decrease records registered by the registration means and acquiring the free capacity of the storage;
A document management system.   The document management system according to claim 6, further comprising a used capacity acquisition unit that acquires the used capacity of the storage based on a cabinet capacity indicating the usable capacity of the storage and the free capacity acquired by the free capacity acquisition unit. . An information processing method executed by an information processing apparatus,
A registration step of registering in the free capacity table a record related to the usable capacity of the storage and an increase / decrease record indicating an increase / decrease in the used capacity of the storage related to the operation processing of the document file;
A free capacity acquisition step of adding a plurality of records registered in the registration step and acquiring the free capacity of the storage;
An information processing method including: An information processing method executed by a document management system,
A registration step for registering an increase / decrease record related to the usable capacity of the storage and an increase / decrease record indicating increase / decrease of the used capacity of the storage related to the operation processing of the document file in the free capacity table;
A free capacity acquisition step of adding a plurality of the increase / decrease records registered in the registration step and acquiring the free capacity of the storage;
An information processing method including: On the computer,
A registration step of registering in the free capacity table a record relating to the usable capacity of the storage and an increase / decrease record indicating an increase / decrease in the used capacity of the storage related to the operation processing of the document file;
A free capacity acquisition step of adding a plurality of records registered in the registration step and acquiring the free capacity of the storage;
A program for running

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