JPH06195253A - File management device - Google Patents

Abstract

PURPOSE:To precisely manage the entities and the names of files scattered about plural file systems. CONSTITUTION:A first file name giving part 102 gives a first file name which corresponds to the entity of the file by one to one for uniquely identifying the entity of the file, and a second file name giving part 202 gives a second file name which corresponds to the first file name by one to many for identifying the file. A file name management part 302 connects the first file name and the second file name by one to many and a connecting number management part 402 manages the connecting number of one to many. Thus, the plural names are given to the entity of one file on the plural file systems. The first file name giving part 102 gives the first file name which corresponds to the entity of the new file which is corrected by a correction processing part 802 by one to one, and the connecting number of the connecting number management part 402 is reduced by one. The corrected file is stored as a different file.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a file management apparatus which has a plurality of computers and file systems on a network and manages the file entities scattered in the plurality of file systems and the names given to the file entities. Regarding

[0002]

2. Description of the Related Art Conventionally, a file management function provided by an operating system (for example, ASCII Publisher, Br.
ian W. Kernighan and others, "UNIX programming environment" translated by Haruhisa Ishida) File management (eg hard link)
There is.

FIG. 4 shows a block diagram of a file management device which realizes a file management function provided by a conventional operating system. Hereinafter, description will be made using the terms used in the above-mentioned references.

In FIG. 1, reference numeral 101 denotes a link management unit, which links (links) an i number (index number) uniquely assigned to a file entity in one file system and a file name mainly given by a user. ). An i-node (index node) management unit 201 manages an i-number, the number of links, an address where a file entity is stored, and the like. Reference numeral 301 is a link number determination unit that determines whether the number of links is 1 or 2 or more, and 401 is an information storage unit that stores the substance of the file. A communication control unit 501 connects a computer including a file management device to the communication network 601. 701
Is a control unit, which controls the link management unit 101, the inode management unit 201, the link number determination unit 301, the information storage unit 401, and the communication control unit 501. The i-number and the substance of the file have a one-to-one correspondence, but the i-number and the file name can have a one-to-many correspondence.

5 and 6 are flow charts showing the operation of the apparatus of FIG.

The process of concatenating file entities will be described with reference to FIG. The concatenation process is a process of giving a different name to an already existing file and creating a link. The connection process is started when the user inputs an operation from the communication network 601 through the communication control unit 501 (step 11). The contents of the input operation are an operation name for concatenation, a link source file name, and a link destination file name. The inode of the file managed by the inode management unit 201 is designated by the instruction of the control unit 701 (step 21). Control unit 70
By the instruction of 1, the number of links in the inode management unit 201 is increased by 1 (step 31), and the connection processing is ended (step 41).

The file decoupling process will be described with reference to FIG. When disconnecting the files, the user starts by inputting an operation for deleting the files from the communication network 601 through the communication control unit 501 (step 12). The contents of the input operation are the operation name for file deletion,
This is the name of the file to be deleted. When the operation is input, the inode management unit 20 is instructed by the control unit 701.
1 specifies the inode of the file managed by 1 and outputs the number of links to the link number determination unit 301 (step 2
2). The link number determination unit 301 determines that the number of links of the inode is 2
It is determined whether or not the above (step 32). When the number of links is 2 or more, the number of links is decremented by 1 according to an instruction from the control unit 701 (step 42), and the connection releasing process is ended (step 62). When the number of links is 1, the control unit 7
By the instruction 01, the substance of the file is deleted from the information storage unit 401 (step 52), and the connection release processing is ended (step 62).

[0008]

When the file concatenation process is performed using the hard link of the file management function provided by the conventional operating system, the i number uniquely assigned in one file system is used. Therefore, there is a problem that the i numbers are duplicated among different file systems, and the file management device cannot uniquely identify them.

When the substance of the file and the file name given to the substance of the file have a one-to-many correspondence, 1
When a file entity is modified using one file name, another file name is also linked to the modified file entity and is also modified at the same time.

Further, when a plurality of computers exist on the network and the substance of the file is accumulated in a plurality of file systems, one file belonging to the file system is stored in another file system on the network. However, there is a problem that the substance of the file and the file name cannot be associated one-to-many.

The present invention has been made in view of the above,
An object of the present invention is to provide a file management device that manages the substance of a file scattered in a plurality of file systems and the name given to the substance of the file in a corresponding manner.

[0012]

In order to achieve the above object, a file management apparatus of the present invention has a plurality of file systems on a network, and the substance of a file existing in any one of the plurality of file systems and A first file management device that manages the name given to a file entity, and that has a one-to-one correspondence with the file entity so that the file management apparatus uniquely identifies the file entity on a plurality of file systems. A first file name assigning unit that assigns a file name to the entity of the file, and a second file name that assigns a second file name that has a one-to-many correspondence with the first file name so that an application and a user can identify the file. A file name assigning unit is connected to the first file name and the second file name to obtain the first file name and the second file name. A file name management unit having a function of making correspondence to many, a concatenation number management unit managing the number of concatenations of the first file name and the second file name, and a first file name at the time of file creation / deletion. A concatenation execution / cancellation determination unit that determines whether to concatenate a plurality of the second file names or release the concatenation, and a plurality of the first file names are concatenated to the second file names when reading the substance of the file. A connection number determination unit that determines whether or not
A temporary storage unit that temporarily stores the file name, the second file name, and the substance of the read file; and the file stored in the temporary storage unit is modified and then stored in the file system. At this time, when the second file name connected to the first file name is 2 or more from the information from the connection number management unit, the process of storing as a new file is performed in cooperation with the first file name assigning unit. The gist is to have a correction processing unit.

[0013]

In the file management device of the present invention, the file management device uniquely identifies the substance of the file among a plurality of file systems scattered over the network, and the first file name corresponds to the substance of the file one-to-one. And a second file name corresponding to the first file name and one-to-many to identify the file to the application and the user, and the first file name and the second file name are connected to one-to-many. The one-to-many concatenation number is managed, whereby a plurality of names are given to one file entity on a plurality of file systems. Also, the modified file is stored in the file system as a new file, and the new file entity is given a first file name corresponding to one-to-one, and is added to the file entity before modification. When the first file name and the second file name are in a one-to-many relationship, the number of connections is reduced by one and the modified file is stored as a separate file.

[0014]

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

FIG. 1 is a block diagram showing the configuration of a file management apparatus according to an embodiment of the present invention. In the figure, a link management unit 101, an inode management unit 201, a link number determination unit 301, an information storage unit 401, and a communication control unit 50.
1 and the communication network 601 are the same as those shown in FIG. 4, and the description thereof will be omitted. A first file name assigning unit 102 assigns a unique first file name to the file entity so that the file management apparatus uniquely identifies the file entity on the multiple file system. A second file name assigning unit 202 assigns a second file name that has a one-to-many correspondence with the first file name so that an application, a user or the like can identify the file. Reference numeral 302 denotes a file name management unit that connects (links) the first file name and the second file name to each other, and links the first file name and the second file name.
It has a function to associate one-to-many file names. 402
Is a concatenation number management unit, which manages the number of concatenated first file names and second file names.

Reference numeral 502 denotes a concatenation execution / cancellation determining unit that discriminates whether to concatenate a plurality of second file names with the first file name or uncoupling the files at the time of file creation / deletion. 60
Reference numeral 2 is a concatenation number determination unit that determines whether or not a plurality of first file names are concatenated with second file names when reading the substance of a file. A temporary storage unit 702 temporarily stores the first file name, the second file name, and the substance of the read file. A correction processing unit 802 performs a process of storing a new file when storing the file in the file system after the file stored in the temporary storage unit 702 is corrected. A control unit 902 includes a link management unit 101 and an inode management unit 2
01, link number determination unit 301, information storage unit 401, communication control unit 501, first file name assignment unit 102, second file name assignment unit 202, file name management unit 302, link number management unit 402, link execution / release The determination unit 502, the connection number determination unit 602, the temporary storage unit 702, and the correction processing unit 802 are controlled.

FIG. 2 is a flow chart for explaining the connection / release processing of the first file name and the second file name in FIG. The connection / disconnection processing is started by an operation input by the user from the communication network 601 through the communication control unit 501 (step 13). The contents of the operation to be input are an operation name for connecting or disconnecting, and a second file name as a connecting source. The operation of the system to automatically connect / disconnect the substance of the file and the file name will be described below. By the instruction of the control unit 902,
The second file name is stored in the temporary storage unit 702 in order to perform the connection / disconnection processing (step 23). The file name management unit 302 searches the first file name linked to the temporarily stored second file according to an instruction from the control unit 902 (step 33), and stores the searched first file name in the temporary storage unit 702. (Step 43).

In accordance with an instruction from the control unit 902, the concatenated number management unit 402 outputs the number of concatenated temporarily stored first and second file names (concatenated number) to the concatenated number determination unit (step 53). ), The connection execution / release determination unit 502 is the first
It is determined whether the file name and the second file name are connected or released (step 63). In the case of the concatenation execution process, the concatenation number management unit 402 increments the concatenation number of the first file name by 1 in accordance with an instruction from the control unit 902 (step 73), and the concatenation execution process ends (step 24). In the case of the connection release processing, the connection number determination unit 602 sets the connection number of the first file name to 2 according to an instruction from the control unit 902.
It is determined whether or not the above (step 83). If the concatenation number is 2 or more, the concatenation number management unit 402 decrements the concatenation number of the first file name by 1 according to an instruction from the control unit 902 (step 93), and terminates the concatenation releasing process (step 24). When the number of connections is 1, the control unit 902
The first file name, the second file name, and the substance of the file are deleted by the instruction (step 14), and the connection release processing is ended (step 24).

FIG. 3 is a flow chart for explaining the file correction process in FIG. The file modification process is started by an operation input by the user from the communication network 601 through the communication control unit 501 (step 15).
The contents of the input operation are the operation name for modification and the second file name of the file to be modified. The operation of the system for automatically correcting a file will be described below. The second file name is stored in the temporary storage unit 702 in order to perform the file correction process according to the instruction from the control unit 902 (step 25). In accordance with an instruction from the control unit 902, the file name management unit 302 searches for the first file name linked to the temporarily stored second file name (step 35), and the found first file name is temporarily stored in the temporary storage unit 702. (Step 45). Control unit 902
In response to this instruction, the correction processing unit 802 reads the substance of the first file name from the information storage unit 401 (step 5
5) and stores it in the temporary storage unit 702 (step 65).

When the stored file is modified by the user or the like (step 75), the concatenation number management unit 402 outputs the concatenation number of the first file name to the concatenation number determination unit 602 (step 85). When the number of connections is 2 or more,
In response to an instruction from the control unit 902, the correction processing unit 802 reduces the number of concatenations of the first file name by 1 (steps 95, 1
6) The first file name assigning unit 102 assigns a new file name to the corrected file stored in the temporary storage unit 702 (step 26). In response to the instruction from the control unit 902, the modification processing unit 802 writes the file in the information storage unit 401 (step 36), and the file modification process ends (step 46). If the number of concatenated first files is 1 (step 95), a new file name is not given, the file name is not changed, and the correction processing unit 802 updates the file with the first file name. The file is written in the storage unit 401 (step 36), and the file modification process is terminated (step 46).

[0021]

As described above, according to the present invention,
In a plurality of different file systems, one file belonging to the file system can be linked to another file system on the network, and the substance of the file and the file name can be associated one-to-many.

Further, conventionally, when a file entity and a file name given to the file entity have a one-to-many correspondence, if one file name is used to modify the file entity, another file is modified. The name is also linked with the entity of the modified file, so it was modified at the same time, but the file management device of the present invention stores only the modified file as a separate file, and the file content and the concatenation structure. Can last.

Further, by using the file management device of the present invention in a system that handles a number of files scattered on the network in association with each other, the user can connect the files without being aware of the name and substance of the file. It is possible to suppress an increase in the storage amount due to copying the same file entity and owning a plurality of files.

Furthermore, the optimum file can be stored in the optimum storage device independently of the existing file system, and the physical structure depending on the hardware of the storage device,
It is possible to construct a storage system that has a function of linking file entities and names, corresponding to the application, independent of the logical structure that depends on the file system.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a file management device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of connection execution / release processing in the file management device shown in FIG.

FIG. 3 is a flowchart showing an operation of file correction processing in the file management device shown in FIG.

FIG. 4 is a configuration diagram of a conventional file management device.

FIG. 5 is a flowchart showing a concatenation process in the conventional file management device shown in FIG.

FIG. 6 is a flowchart showing a connection release process in the conventional file management device shown in FIG.

[Explanation of symbols]

 101 link management unit 102 first file name assignment unit 201 inode management unit 202 second file name assignment unit 301 link number determination unit 302 file name management unit 401 information storage unit 402 connection number management unit 501 communication control unit 502 connection execution / Release determination unit 601 Communication network 602 Connection number determination unit 702 Temporary storage unit 802 Correction processing unit

Claims (1)

[Claims] 1. A file management device for managing a file entity existing in any one of a plurality of file systems and a name given to the file entity, the file management apparatus comprising a plurality of file systems on a network. A first file name corresponding to the entity of the file on a one-to-one basis in order to uniquely identify the entity of the file on the file system of
A file name assigning section, a second file name assigning section that assigns a second file name corresponding to the first file name in a one-to-many manner for applications and users to identify the file, and the first file name A file name management unit having a function of connecting the second file name and making the first file name correspond to the second file name one-to-many;
A concatenation number management unit that manages the number of concatenations of the first file name and the second file name, and concatenates or releases the second file name with the first file name when creating / deleting a file. A concatenation execution / cancellation determination unit that determines whether or not to connect, a concatenation number determination unit that determines whether or not a plurality of the first file names are concatenated with the second file name when reading the substance of the file, A temporary storage unit that temporarily stores the first file name, the second file name, and the substance of the read file; and a file system after making corrections to the files stored in the temporary storage unit. When the second file name connected to the first file name is 2 or more from the information from the connection number management unit when storing,
A file management device comprising: a correction processing unit that performs a process of storing as a new file in conjunction with the first file name assigning unit.