JPH09288608A - File sharing controller in distributed processing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To confirm the sharing state of the file of another computer in a present computer in a distributed processing system. SOLUTION: The file sharing control and management means 34 of a remote computer 3 records the file sharing state of a file 37 in a file sharing control and management structure body 36 and delivers it to a remote file sharing control and management means 35. The remote file sharing control and management means 35 outputs the file sharing state through a network 2 to the remote file sharing control and management means 15 of a local computer 1 and the file sharing control and management means 14 records the file sharing state in the file sharing control and management structure body 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a file sharing control device in a distributed processing system having a plurality of computers and a network.

[0002]

2. Description of the Related Art FIG. 3 shows the configuration of a conventional computer system having a file sharing control device of this type. It has a local computer 201 for executing an application program 210, a network 202, and a remote computer 203. Consists of.

In FIG. 3, for example, the local computer 20
When the input / output processing is performed from the application program 210 of No. 1 to the record 235 belonging to the file 237 of the remote computer 203, the application program 210 makes an input / output request to the file access management means 211, and this input / output request is made to the remote computer 203. Since this is a case of an input / output request to / from the file access management means 211, the file access management means 211 uses the remote file access management transmission means 2.
Input / output request is made to 12.

Remote file access management transmission means 2
12 is a remote computer 20 via the network 202.
3 is notified to the remote file access management reception means 233 of No. 3, the remote file access management reception means 233 makes an input / output request to the file access management means 231, and the file access management means 31 enters the file sharing control means 234. Notify the file sharing condition by output request.

The file sharing control unit 234 updates the file sharing control management structure 236 according to the file sharing condition, determines whether the file input / output can be executed, waits until the input / output execution state is reached, and the file access management unit 231. Do not return control to. The file access management means 231 executes input / output to the record 238 of the file 237 when the control is returned from the file sharing control means 234.

[0006]

In the above-mentioned file sharing controller in the conventional distributed processing system, since the remote computer has no means for notifying the local computer of the file sharing state, the local computer uses the remote file of the remote computer. In this case, since the file sharing control status of the remote file cannot be recognized from the local computer, it is necessary to operate the remote computer to confirm the file sharing status of the remote file.

Further, both the local computer and the remote computer can manage only the file sharing state within the own computer, and there is no means for recognizing the state of other systems.
If a deadlock condition related to file sharing control occurs between an application program that uses local files and remote files on the local computer and an application program that uses local files and remote files on the remote computer,
There is a problem that neither computer can recognize the deadlock state.

The present invention has been proposed in view of the above points, and an object of the present invention is to generate a file sharing state relating to an input / output request from another computer to the computer which has made the input / output request. By notifying each of them, it becomes possible to manage the file sharing control status related to the local file and the remote file used by the application program in the local computer on both the local computer and the remote computer, and maintainability of the program execution state management and the computer system It is to provide a file sharing control device capable of improving reliability.

[0009]

A file sharing controller in a distributed processing system according to the present invention uses the file sharing control information of another computer in its own computer when using a remote file on another computer existing on a network. However, the feature is that you can manage and check the file sharing status.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a computer system to which a file sharing control device in a distributed processing system of the present invention is applied.

In FIG. 1, in this embodiment, a local computer 1 for executing an application program 10, a remote computer 3 in which a file 37 to be used by the application program 10 exists, a local computer 1 and a remote computer 3 are connected. The network 2 is used for exchanging data.

The local computer 1 includes an application program 10, a file access management means 11, a remote file access management transmission means 12, a file sharing control management means 14, a remote file sharing control management means 15 and a file sharing control management structure 16. It is provided.

On the other hand, on the remote computer 3 side, file access management means 31, remote file access management reception means 33, file sharing control management means 34, remote file sharing control management means 35, file sharing control management structure 36, and A file 37 is provided.

When the application program 10 of the local computer 1 inputs / outputs the record 38 in the file 37 of the remote computer 3, the file access management means 11 analyzes the input / output request issued from the application program 10 and inputs it. Since the file to be output exists in another computer, the input / output request is delivered to the remote file access management transmission means 12, and the remote file access management transmission means 12 receives the remote file access management reception of the remote computer 3 via the network 2. The input / output request is output to the means 33.

Remote file access management receiving means 3
3 transfers the input / output request to the file access management means 31, the file access management means 31 analyzes the input / output request, transfers the file sharing condition to the file sharing control managing means 34, and the file sharing control managing means 34.
Performs the file sharing control based on the file sharing condition and records the file sharing state in the file sharing control management structure 36.

Further, the file sharing control means 34 is used by the application program 1 which has made a file input / output request.
Since 0 is not an application program executing in the own computer, the file sharing state recorded in the file sharing control managing structure 36 is passed to the remote file sharing control managing means 35, and the remote file sharing control managing means 35 transmits the network 2 Via local computer 1
The file sharing status is output to the remote file sharing control managing means 15.

Remote file sharing control management means 15
Passes the input file sharing state to the file sharing control management means 14, and the file sharing control management means 14 records it in the file sharing control management structure 16. As a result, the local computer 1 has the file 3 of the remote computer 3
When trying to use 7, the shared state of the file 37 can be recognized by referring to the file sharing control management structure 16.

Further, the file sharing control managing means 34 returns control to the file access managing means 31 when the file input / output processing becomes executable at the time of analyzing the input / output request,
The file access management means 31 performs input / output processing for the record 38 of the file 37.

Next, a second embodiment of the present invention will be described with reference to the drawings.

FIG. 2 is a block diagram showing an embodiment of a computer system to which the file sharing control device in the distributed processing system of the present invention is applied.

In this embodiment, in FIG. 2, a local computer 101 that executes a first application program 110, a remote computer 103 that executes a second application program 130, and a local computer 101.
And a network 102 for exchanging data between the remote computer 103 and the remote computer 103.

On the local computer 101 side, an application program 110 and a file access management means 1
11, remote file access management transmission means 112,
A remote file access management receiving means 113, a file sharing control managing means 114, a remote file sharing control managing means 115, a file sharing control management structure 116 and a file 17 are provided.

On the other hand, on the remote computer 103 side, an application program 130, a file access management means 131, a remote file access management transmission means 1
32, remote file access management receiving means 133,
File sharing control management means 134, remote file sharing control management means 135, file sharing control management structure 1
36 and a file 137 are provided.

First, from the application program 110 of the local computer 101 to the remote computer 103
When the record 138 in the file 137 of the above is input / output processed, the file access management means 111 analyzes the input / output request issued from the application program 110, and the file to be input / output exists in another computer. Therefore, the input / output request is delivered to the remote file access management transmission unit 112. The remote file access management transmission unit 112 outputs an input / output request to the remote file access management reception unit 133 of the remote computer 103 via the network 102.

Remote file access management receiving means 1
33 transfers the input / output request to the file access management means 131, and the file access management means 131
Analyzes the input / output request and delivers the file sharing condition to the file sharing control management means 134. The file sharing control management means 134 performs the file sharing control based on the file sharing condition and records the file sharing state in the file sharing control management structure 136.

Further, since the file sharing control means 134 is not the application program executed by the application program 110 which has issued the file input / output request within the own computer, the file sharing control management means 135 is provided with the file sharing control management structure. The file sharing state recorded in the body 136 is delivered. The remote file sharing control managing means 135 outputs the Nofile sharing status to the remote file sharing correct / wrong management means 115 of the local computer 101 via the network 102.

Remote file sharing control management means 115
Passes the input file sharing state to the file sharing control managing means 114, and the file sharing control managing means 11
4 is recorded in the file sharing control management structure pair 116.

Further, the file sharing control managing means 134 returns the control to the file access managing means 131 when the file input / output processing becomes executable at the time of analyzing the input / output request, and the file access managing means 131 sends the file 137.
I / O processing is performed on the record 138 of

On the other hand, when the application program 130 of the remote computer 103 inputs / outputs the record 118 in the file 117 of the local computer 101, the file access management means 131 analyzes the input / output request issued from the application program 130. Since the file to be input / output exists in another computer, the input / output request is delivered to the remote file access management transmitting means 32. The remote file access management transmitting means 132 outputs the input / output request to the remote file access management receiving means 113 of the remote computer 101 via the network 102.

Remote file access management receiving means 1
Reference numeral 13 delivers the input / output request to the file access management means 111. The file access management means 111 analyzes the input / output request and delivers the file sharing condition to the file sharing control managing means 114. The file sharing control managing means 114 performs file sharing control based on the file sharing condition and records the file sharing state in the file sharing control management structure 116.

Further, since the file sharing control means 114 is not the application program executed by the application program 130 which has issued the file input / output request in the own computer, the remote file sharing control management means 115 has the file sharing control management structure. The file sharing state recorded in 116 is delivered. The remote file sharing control managing means 115 outputs the file sharing status to the remote file sharing control managing means 135 of the local computer 103 via the network 102.

Remote file sharing control management means 135
Takes over the input file sharing state to the file sharing control management means 134, and the file sharing control management means 134
Is described in the file sharing control management structure 136.

Further, the file sharing control managing means 114 returns control to the file access managing means 111 when the file input / output processing becomes executable at the time of analyzing the input / output request, and the file access managing means 111 sends the file 117.
The input / output processing is performed on the record 118.

Next, from the application program 110 of the local computer 101, the file 117 of its own computer
When the input / output processing of the record 118 in the file is performed, the file access management unit 111 analyzes the input / output request issued from the application program 110, and the file to be input / output exists in the own computer. File sharing control management means 11 for sharing conditions
4, the file sharing control management means 114 performs file sharing control based on the file sharing conditions and also the file sharing state is managed by the file sharing control management structure 116.
To record.

In this case, the above-mentioned remote computer 103
When the input / output request content for the record 118 in the file 117 executed by the application program 130 is a request to execute exclusively with other input / output, the input / output processing with the application program 130 of the remote computer 103 is performed. Conflict is detected, and the input / output processing is in a waiting state until the conflict state is released.

Further, the application program 130 of the remote computer 103 is used by the file 137 of the own computer.
When the input / output processing of the record 138 in the above is performed, the file access management means 131 analyzes the input / output request issued from the application program 130 and the file to be input / output exists in the own computer. , File sharing conditions are defined as file sharing control management means 1
Deliver to 34. The file sharing control managing means 134 controls the file sharing based on the file sharing condition, and determines the file sharing state by the file sharing control management structure 13.
Record in 6.

In this case, all the above-mentioned input / output, that is, the input / output from the application program 110 to the record 138 and the application program 130.
If the request contents of the input / output to / from the record 118 from the application program 110 and the input / output request from the application program 110 to / from the record 118 are requests to be executed exclusively with other input / output, the input / output processing is performed by the application of the remote computer 101. I / O processing conflicts with the program 110 are detected, and a waiting state is entered until the conflict state is released. Moreover, the application program 110, which is the cause of waiting for the input / output processing, is the application program 130 record 11 that is the requester of the input / output.
The file sharing control management means 135 detects the deadlock state related to the file sharing control among a plurality of computers because the waiting state has already occurred due to the input / output processing for the eight computers.

The file sharing control managing means 135 is related to the deadlock state by notifying the file sharing control managing means 115 of the local computer 101 via the network 102 about the occurrence of the deadlock state relating to the file sharing control. Manage the same status on all computers.

[0040]

According to the present invention, in a distributed processing system in which data is shared among a plurality of computers, a means for notifying both the local computer and the remote computer of the file sharing state in response to an input / output request from another computer. , And the means for centrally managing the file sharing status of the notified other computer with the file sharing status of the local computer, when using the remote file of the remote computer from the local computer, file sharing control of the remote file from the local computer The state can be recognized.

Further, both the local computer and the remote computer are provided with means for referencing both the file sharing state within the own computer and the file sharing state within another computer within the local computer, so that the local computer and the remote file can be referred to by the local computer. When a deadlock condition related to file sharing control occurs between an application program that uses a file and an application program that uses a local file and a remote file on a remote computer, both computers recognize the above state. The effect is that you can do it.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a computer system using an embodiment of a file sharing control device in a distributed processing system of the present invention.

FIG. 2 is a configuration diagram showing a computer system using another embodiment of the file sharing control device in the distributed processing system of the present invention.

FIG. 3 is a configuration diagram showing a file sharing control device in a conventional distributed processing system.

[Explanation of symbols]

1, 101, 201 Local computer 3, 103, 203 Remote computer 10, 110, 130, 210 Application program 11, 31, 111, 131, 211, 231 File access management means 12, 112, 132, 212 Remote file access management transmission Means 33, 113, 133, 233 Remote file access management receiving means 14, 34, 114, 134, 234 File sharing control managing means 15, 35, 115, 135, 235 Remote file sharing control managing means 16, 36, 116, 136 , 236 file sharing control management structure 2, 102, 202 network 37, 117, 137, 237 file 38, 118, 138, 238 records.

Claims (3)

[Claims] 1. A distributed processing system characterized in that, when a remote file on another computer existing on a network is used, the file sharing control information of the other computer can be managed in the own computer and the file sharing state can be confirmed. File sharing controller in. 2. A file sharing control apparatus in a distributed processing system according to claim 1, wherein the file sharing control information is referenced to detect a deadlock state relating to file sharing control between a plurality of computers. 3. A file access management means for outputting an input / output request when an input / output process is performed on a remote file of a remote computer from an application program, and the output input / output request is notified to the remote computer via a network. Remote file access management transmission means, remote file access management reception means for analyzing the notified input / output request and outputting to the file access management means of the own computer, and file sharing conditions of the own computer based on the analyzed input / output request. File sharing control management means for managing the file sharing status received via the file access management means, updating the file sharing control management structure, and file sharing status regarding I / O requests from other computers and I / O requests to other computers Sent between computers via File sharing control apparatus according to claim 1, wherein in a distributed processing system characterized by having a remote file sharing control management means for signal.