JPH05189291A - Network file system management device - Google Patents

Abstract

PURPOSE:To automatically execute necessary processing such as the deletion or the copying, etc., of a file at the time of connecting or disconnecting a computer to a network. CONSTITUTION:A file copying part 11 copies the file existing in a file server computer to a client computer in conformity with information held by a copied file information holding part 10. A file deleting part 51 deletes the file existing in the client computer in conformity with the information held by a deleted file information holding part 50. An access history judging part 91 judges whether limit information determined beforehand is achieved or not in conformity with the information held by an access history holding part 90, and the file copying part 92 copies the file existing in the file server computer judged to have achieved the predetermined number of times by the access history judging part 91 to the client computer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network file system management device for managing files between a client computer and a file server computer in a computer system.

[0002]

2. Description of the Related Art In recent years, with the development of computer equipment such as personal computers and workstations, in order to perform work more efficiently, a function of a network file system is widely used in which some files are shared within a network. Has been done.

In a general network file system, when a client computer is newly connected to a network, files that can be shared in the network may exist in duplicate in the client computer. Also, when disconnecting a client computer from the network, files shared within the network cannot be referenced.

Conventionally, when disconnecting a client computer connected to a network from the network, it is checked how much files shared in the network are held in the file server computer, and the client computer is disconnected before disconnecting from the network. I had to copy it to. In addition, when a client computer is newly connected to a network, a file that can be shared in the network may be held in duplicate by the client computer.

[0005]

However, the management of files in the above network file system has the following problems. First, when the client computer is disconnected from the network, the file server computer determines how many files are shared in the network, and some files need to be newly copied to the client computer. Whether, if any,
This means that you have to find out which file you want to copy. Secondly, when the client computer newly connects to the network and the client computer uniquely holds the same file as the file shared in the network, the file will be duplicately held. Therefore, the storage device of the client computer is wasted. In addition, when trying to delete a file that is held in duplicate, it is necessary to find out which file is unnecessary.

In view of the above points, according to the present invention, when a client computer is disconnected from the network, the file is automatically copied onto the host computer according to the information of the file that needs to be copied from the file server computer connected to the network. It is an object of the present invention to provide a network file system management device that can be used. Also, as the information of the file to be copied, it is possible to automatically compare the files held by the client computer and the file server computer and copy the file according to the difference information. Furthermore, the file can be copied from the client computer to the file server computer. It is an object of the present invention to provide a network file system management device capable of copying a file according to the information of the file accessed a certain number of times or more from the access history.

It is another object of the present invention to provide a network file system management apparatus capable of automatically deleting a file from a client computer according to unnecessary file information when the client computer is newly connected to a network. To aim.
Furthermore, as information about unnecessary files, the files held by the client computer and the file server computer are automatically compared, and the files on the client computer are deleted according to the duplicated information held by the client computer. It is an object of the present invention to provide a network file system management device that can be used.

[0008]

According to a first aspect of the present invention, a client computer that refers to a file held by another computer connected to a network is connected to a file server computer that manages a file referred to by the client computer. A file server computer according to the information held by the copy file information holding unit, which holds information about files to be copied from the file server computer to the client computer when disconnected from the network. And a file copying section for copying a file existing in the client computer to a client computer.

In the second invention, a client computer that refers to a file held by another computer connected to the network is newly added to a network to which a file server computer that manages a file referred to by the client computer is connected. A deletion file information holding unit for holding information of a file to be deleted from the client computer when connecting, and a file deletion unit for deleting a file existing in the client computer according to the information held by the deletion file information holding unit. The file deletion device is characterized in that

A third aspect of the present invention disconnects a client computer that refers to a file held by another computer connected to the network from a network to which a file server computer that manages a file referred to by the client computer is connected. When
An access history holding unit that holds a history of files accessed from the client computer to the file server computer, and determines whether the access history reaches predetermined limit information according to the information held by the access history holding unit An access history judging unit and a file copying unit for copying a file whose access history is judged to have reached predetermined limit information by the access history judging unit from a file server computer to a client computer. Network file system management device.
It is a network file system management device.

According to a fourth aspect of the present invention, difference information that holds difference information between files of a file server computer and a file server computer that holds a copy file holding unit according to claim 1 in a file server computer but not in a client computer. The network file system management device is characterized by being replaced by a holding unit.

According to a fifth aspect of the present invention, the deletion file holding unit according to claim 2 holds the duplication information holding unit that holds the duplication information of the files of the file server computer and the client computer that are commonly held by the file server computer and the client computer. The file network file system management device is characterized by being replaced by.

[0013]

With the above-described configuration, the network file system management apparatus of the present invention transfers from the file server computer to the client computer a file that matches information defined when the client computer is disconnected from the network to which the file server computer is connected. When copying and newly connecting the client computer to the network, it is possible to delete from the client computer a file matching the defined information.

[0014]

Embodiments will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing a network file system management apparatus according to the first embodiment of the present invention. In FIG. 1, 10 is a copy file information holding unit that holds information about files to be copied from the file server computer to the client computer, and 11 is information according to the information that the copy file information holding unit 10 holds.
A file copying unit that copies a file from a file server computer to a client computer.

FIG. 2 is a schematic diagram showing what kind of files the client computer and the file server computer are connected to the network and holds, and FIG. 3 shows the information held by the copy file information holding unit. FIG. In this example, as the copy file information, files to be copied are file1 and file2.
It means that. As copy file information,
In addition to the method of enumerating and describing file names like this,
It is possible to write a directory name or write some kind of file identifier. FIG. 4 is a schematic diagram showing the state of files held by the client computer and the file server computer after disconnecting the client computer from the network.

In the example of FIG. 2, the client computer is connected to the same network as the file server computer, and the client computer is file3.
file4, file server computer is file
It holds 1, file 2, and file 5, respectively.
In addition, the client computer transmits files 1 and 2 of the file server computer via the network.
2 and 5 can be accessed.

When the client computer is disconnected from the network to which the file server computer is connected, the file copying unit 11 follows the information held by the copied file information holding unit 10 as file1 and file2.
Is copied from the file server computer, and the client computer displays files 1, f as shown in FIG.
ile2, file3, and file4 will be held.

In this embodiment, the file copying unit 11 performs copying in accordance with the information held by the copied file information holding unit 10, but the present invention is not limited to such a method, and another method may be used. Can be used.
A method may be adopted in which the file to be copied can be input by the user in advance and copying is performed according to the information.

A second embodiment of the present invention will be described below with reference to the drawings. FIG. 5 is a configuration diagram showing a network file system management apparatus in an embodiment of the second invention of the present invention. In FIG. 5, reference numeral 50 is a deleted file information holding unit that holds information on files to be deleted from the client computer, and 51 is a file deletion unit that deletes files on the client computer according to the information held by the deleted file information holding unit 50.

FIG. 6 is a schematic diagram showing what kind of files the client computer and the file server computer hold before the client computer is connected to the network, and FIG. 7 shows the deleted file information holding unit. It is an explanatory view of information held. In this example, the deletion target file information indicates that the files to be deleted are file2 and file3.
As the deleted file information, in addition to the method of listing the file names as described above, a method of describing a directory name or a file identifier of some kind can be considered. FIG. 8 is a schematic diagram showing the state of files held by the client computer and the file server computer after newly connecting the client computer to the network.

In the example of FIG. 6, the client computer is disconnected from the network, and
holding e2 and file3, and the file server computer is connected to the network
It holds le3, file4, and file5.

When the client computer is newly connected to the network to which the file server computer is connected, the file deletion unit 51 follows the information stored in the deleted file information storage unit 50, file2 and file2.
By deleting e3 from the client computer, the client computer retains only file1 as shown in FIG. 8, and the file retained by the file server computer via the connected network.
File 2, file 3, file 4, and file 5 can be accessed.

In the present embodiment, the file deletion unit 51 deletes the copy file according to the information held by the deleted file information holding unit 50. However, the present invention is not limited to such a method, and another method may be used. Can be used. A method may be adopted in which the file to be deleted is allowed to be input by the user in advance and the file is deleted according to the information.

Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 9 is a configuration diagram showing a network file system management device in the third exemplary embodiment of the present invention. In FIG. 9, reference numeral 90 denotes an access history holding unit for holding a history of files accessed from the client computer to the file server computer, and 9
Reference numeral 1 denotes an access history determination unit that determines whether or not the access history has reached predetermined limit information according to the information held by the access history holding unit 90, and reference numeral 92 indicates limit information predetermined by the access history determination unit 91. It is a file copying unit that copies a file determined to have arrived from the file server computer to the client computer.

FIG. 10 is a schematic view showing what kind of files the client computer and the file server computer are connected to the same network and holds, respectively. FIG. 11 shows a file access history holding unit holding the files. FIG. 6 is an explanatory diagram of information (file name and access count in this embodiment) that is displayed. In this example, for example,
It holds an access history that the number of times of access from the client computer of the file having the file name file2 to the file server computer is 9 times.

In FIG. 12, the access history judgment unit 91 reaches the predetermined limit information (in the present embodiment, the number of times of access to the corresponding file is 9 times or more) according to the information held by the access history holding unit 90. It is an explanatory view showing how to judge whether or not there is.

FIG. 13 is a schematic diagram showing the state of files held by the client computer and the file server computer after disconnecting the client computer from the network.

In the example of FIG. 10, the client computer is connected to the same network as the file server computer, and the client computer is a file.
1, file6, file server computer is fil
It holds e2, file3, file4, and file5, respectively. Also, the client computer is a file server computer via the network.
2, 2, 3, 4, and 5 can be accessed.

When disconnecting the client computer from the network to which the file server computer is connected, the access history judging section 91 judges according to the information held by the access history holding section 90 as shown in FIG. In this embodiment, the files that have reached the limit information that the number of times of access from the client computer to the file server computer to the file is 9 or more are file2 and file3 as shown in FIG. The file copying unit 92 copies the file2 and the file3, which are judged by the access history judging unit 91 that the limit information has been reached, from the file server computer to the client computer via the network, and the client computer makes the file1 as shown in FIG. , File2, file3, file6
Will hold.

In the present embodiment, the number of times the file is accessed from the client computer to the file server computer is 9 times or more, but the limit information of the access history judging section 91 is used, but the limit information is not limited to the number of accesses. It is also applicable to use limit information such that the elapsed time since the last access of the file server computer from the client computer of the relevant file is within a fixed time, and the access interval is within a fixed time. Is clear.

Next, a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 14 is a configuration diagram showing a network file system management device in the fourth exemplary embodiment of the present invention. In FIG. 14, reference numeral 140 denotes a difference information holding unit that holds difference information of files held by the client computer and the file server computer, 1
Reference numeral 41 denotes a file copying unit that copies a file from the file server computer to the client computer according to the information held by the difference information holding unit 140.

FIG. 15 is a schematic diagram showing what kind of files the client computer and the file server computer are connected to the network and holds, and FIG. 16 shows the client computer in the state as shown in FIG. 3 is an explanatory diagram of difference information of files held by the file server computer. FIG.

In the example of FIG. 15, the client computer is connected to the same network as the file server computer, and the client computer is a file.
3, file4 File server computer is file
It holds 1, file 4, and file 5, respectively.
The client computers are files 1 and f held by the file server computer via the network.
ile5 can be accessed. In this example,
As shown in FIG. 6, file 1 and file 5 are information of files that are present in the file server computer as difference information but not in the client computer.
Holding The file copying unit 141 receives the file1 and fi from the file server computer according to the difference information held by the difference information holding unit 140 as shown in FIG.
Copy le5 to the client computer.

In the present embodiment, it is considered that the information stored in the difference information storage unit exists in the file server computer but does not exist in the client computer. However, as shown in the example, it is simply a file name. Not only the method of comparing by the difference but also the method of comparing the positional relationship in the file system and the method of comparing both from the viewpoint of the file name and the generation time of the file, the system reliability is improved. It is also possible to increase.

Next, a fifth embodiment of the present invention will be described with reference to the drawings. FIG. 17 is a configuration diagram showing a network file system management apparatus in the fifth exemplary embodiment of the present invention. In FIG. 17, reference numeral 170 denotes a duplicate information holding unit that compares files held by the client computer and the file server computer and holds information about duplicate files, and 171 deletes files from the client computer according to the information held by the duplicate information holding unit. This is a file deleting unit.

FIG. 18 is a schematic diagram showing what kind of files each client computer holds before it is newly connected to the network. FIG. 19 shows the files held by the client computer and the files as shown in FIG. Compare the files held by the server computer,
It is explanatory drawing about the information of the file hold | maintained overlappingly.

In the example of FIG. 18, the client computer is connected and the client computer is
file1, file2, file3, file4 File server computer is file1, file3, fi
It holds le4 and file5, respectively. In this example, as shown in FIG. 19, file 1 and file 3 and f are information of files that are common to the file server and the client computer as duplicate file information.
Holds ile4. The file deletion unit 171 deletes file1, file3, and file4 from the client computer according to the duplicate file information held by the duplicate file holding unit 170 as shown in FIG.

In this embodiment, it is considered that the information held by the duplicate information holding unit is a file that is commonly present in the file server computer and the client computer. However, as shown in the example, comparison is made by simply duplicating the file names. The system reliability is further improved by adopting a method of comparing the positional relationship in the file system, or a method of comparing from the viewpoint of both the file name and the time when the file was created. Is also possible.

[0040]

As described above, according to the present invention, a file matching the information determined when the client computer is disconnected from the network to which the file server computer is connected is copied from the file server computer to the client computer, Also, when a new client computer is connected to the network, a file that matches the specified information can be deleted from the client computer. Therefore, when disconnecting, the client computer and the file server computer shared the network. It saves you having to find out if the file has a new file that needs to be copied to the client computer, and when you connect, you can copy the file shared in the network. It is possible to avoid this to hold duplicated in the computer and the file server computer. You can also save yourself the trouble of finding out which files are no longer needed. Further, as compared with the case where the files are held redundantly, the storage device of the client computer is not wasted.

Therefore, the practical effect of the present invention is great.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a network file system management device according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing a state in which a client computer and a file server computer are connected to a network in the embodiment.

FIG. 3 is an explanatory diagram of information held by a copy file information holding unit in the embodiment.

FIG. 4 is a schematic diagram showing a state where the client computer is disconnected from the network in the embodiment.

FIG. 5 is a configuration diagram showing a network file system management device according to a second embodiment of the present invention.

FIG. 6 is a schematic diagram showing a state before a client computer is connected to a network in the embodiment.

FIG. 7 is an explanatory diagram of information held by a deleted file information holding unit in the embodiment.

FIG. 8 is a schematic diagram showing a state after the client computer is connected to the network in the embodiment.

FIG. 9 is a configuration diagram showing a network file system management device according to a third embodiment of the present invention.

FIG. 10 is a schematic diagram showing a state in which a client computer is connected to a network in the embodiment.

FIG. 11 is an explanatory diagram of information held by a file access history holding unit in the embodiment.

FIG. 12 is an explanatory diagram showing how the access history determination unit determines whether or not predetermined limit information is reached in the same embodiment.

FIG. 13 is a schematic diagram showing a state after disconnecting the client computer from the network in the embodiment.

FIG. 14 is a configuration diagram showing a network file system management device according to a fourth embodiment of the present invention.

FIG. 15 is a schematic diagram showing a state before disconnecting the client computer from the network in the embodiment.

FIG. 16 is an explanatory diagram of file difference information information held by the file server computer and the client computer in the embodiment.

FIG. 17 is a configuration diagram showing a network file system management device according to a fifth embodiment of the present invention.

FIG. 18 is a schematic diagram showing a state before connecting a client computer to a network in the embodiment.

FIG. 19 is an explanatory diagram of duplicate file information that the file server computer and the client computer duplicately hold in the embodiment.

[Explanation of symbols]

 10 copy file information holding unit 11 file copying unit 50 deleted file information holding unit 51 file deleting unit 90 access history holding unit 91 access history judging unit 92 file copying unit 140 difference information holding unit 141 file copying unit 170 duplicate information holding unit 171 files Deletion section

Claims (5)

[Claims] 1. When disconnecting a client computer that refers to a file held by another computer connected to the network from a network to which a file server computer that manages a file referred to by the client computer is disconnected, A copy file information holding unit for holding information about files to be copied from the server computer to the client computer, and a file existing in the file server computer is copied to the client computer according to the information held by the copy file information holding unit in the client computer. A network file system management device comprising a file copying unit. 2. When newly connecting a client computer that refers to a file held by another computer connected to the network to a network to which a file server computer that manages a file referred to by the client computer is connected A deletion file information holding unit for holding information of a file to be deleted from the client computer, and a file deletion unit for deleting a file existing in the client computer according to the information held by the deletion file information holding unit. Network file system management device. 3. When disconnecting a client computer that refers to a file held by another computer connected to the network from a network to which a file server computer that manages a file referred to by the client computer is disconnected, Access history holding unit for holding a history of files accessed from the computer to the file server computer, and access for judging whether or not the access history has reached predetermined limit information according to the information held by the access history holding unit A history judgment unit, and a file for copying a file whose access history is judged to have reached predetermined limit information by the access history judgment unit from the file server computer to the client computer A network file system management device comprising a copying unit. 4. The copy file holding unit according to claim 1,
A network file system management device characterized by being replaced by a difference information holding unit which holds difference information between files of a file server computer and a file server computer which holds a file server computer but does not hold a client computer. 5. The deletion file holding unit according to claim 2,
A file network file system management device, characterized in that the file server computer and the client computer are replaced by a duplication information holding unit that holds duplication information of files of the file server computer and the client computer.