JP2000298636A - Method and device for managing communication network between client and server - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize exclusion control from a client to a server without necessitating human decision. SOLUTION: A client 1 side holds the server information of a server 2 to be a control object, and a control authority securing request and a control authority releasing request to the server 2 are performed from the client 1. When the server 2 receives the requests, it performs a response showing either success or failure about control authority securing and control authority releasing to the client 1 issuing the requests on the basis of the held current control authority state. The client 1 side recognizes the success or failure of the control authority securing and control authority releasing in the server 2 in the client 1 side on the basis of server information and the response.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a client
The present invention relates to a method and apparatus for managing a communication network between servers, and more particularly to a method and apparatus for managing a communication network between a client and a server in which different clients do not simultaneously control the same server.

[0002]

2. Description of the Related Art Today, communication networks have become large-capacity and complicated due to the spread of the Internet and the like. In order to efficiently manage the complicated communication networks, a plurality of transmission apparatuses to be managed are managed by servers and transmission apparatuses. A communication network management system has been constructed using a plurality of management devices that perform the above as clients.

FIGS. 5 and 6 are block diagrams of a conventional client server system. In these figures, reference numeral 3 denotes a client, and 4 denotes a plurality of servers connected to the client 3 via a communication network. The configuration shown in FIG.
This is a case in which the management device as the client 3 is configured as a single unit, and there is no need to perform exclusive control as a communication network management method between the client and server in such a client-server system.

[0006] In the configuration shown in FIG. 6, a case is described in which a plurality of management devices as clients 3 are configured. A method for managing a communication network between a client and a server in such a client-server system is as follows.
As an operational constraint, only one client 3 is allowed to control, so that different clients do not control the server 4 at the same time.

[0005]

SUMMARY OF THE INVENTION A conventional client
In a communication network management method and apparatus between servers,
In order to prevent the server 4 from being controlled at the same time, operational restrictions must be provided, such as allowing only one client 3 to perform control. There is a problem that it is necessary and that it is impossible to cope with an error in the judgment. Specifically, for example, when one client sets data to all servers on the network and another client requests different data to be set to all servers, inconsistency occurs in the data. There was a problem that.

[0006] The present invention has been made to solve the above-described problems, and does not involve human judgment.
It is an object of the present invention to provide a method and an apparatus for managing a communication network between a client and a server which can prevent simultaneous control of the same server from different clients.

[0007]

According to a method for managing a communication network between a client and a server according to the present invention, server information indicating a server to be controlled is held on a client side, and a control right securing request is issued to the server. Requesting the client to make a request for control or release of control right,
When the server receives the control right securing request or the control right releasing request from the client, the server obtains the control right securing request or the control right based on the current control right status of the client held by the server. A response step of performing a response indicating any of success or failure in securing the control right or releasing the control right to the client that issued the release request, the server information held on the client side, and the response from the server The method further comprises a confirmation step of recognizing success or failure of securing the control right and releasing the control right in the server by the client.

[0008] In the method for managing a communication network between a client and a server according to the present invention, when the server receives a control right securing request or a control right release request from the client, the current control right status of the client held on the server side. However, on the condition that the control right is not secured by any other client except the client, the control right securing or control right release to the client which issued the control right securing request or the control right releasing request is performed. And a response step of performing a response indicating the success of the process.

In the method for managing a communication network between a client and a server according to the present invention, when the server receives a control right release request from the client, the current control right status of the client held by the server is:
If the control right is secured by the client, the control right status of the current client held on the server side indicates that the control right is not secured by any client including the client. The method further comprises a response step of rewriting to the control right state and sending a response indicating success in releasing the control right to the client having issued the control release request.

In the method for managing a communication network between a client and a server according to the present invention, when a response indicating a success in securing the control right is made in response to the request for securing the control right from the client in the response step, the current state of the control authority by the client Is rewritten to the client information about the client that has issued the control right securing request.

[0011] The method for managing a communication network between a client and a server according to the present invention is characterized in that server information indicating a server to be controlled held on the server side and a control right securing response and a control right release response returned from the server. The transmission source is compared, and if the control right securing response or the control right releasing response from the control right securing request destination or the control right release request destination is successful, the control right for the server is secured and the control right is released. A confirmation step of recognizing that the control right securing response or the control right releasing response is unsuccessful if the control right securing response or the control right releasing response is unsuccessful. Things.

[0012] The method for managing a communication network between a client and a server according to the present invention includes a control step of controlling only a server whose control right has been recognized in the confirmation step.

[0013] In the communication network management method between a client and a server according to the present invention, when securing of the control right for another server fails, control of the control right is recognized even for the server whose securing of the control right can be recognized in the confirmation step. A server control step of releasing the control right secured for the server on the assumption that the securing has failed is provided.

[0014] A communication network management device according to the present invention includes a server information holding unit for holding server information indicating a server to be controlled on the client side, and a control right securing request or a control right release request to the server. From to the server, the server information held in the server information holding unit and, based on a response indicating success or failure of control right securing or control right release for the client from the server, A client-side exclusive control management unit that recognizes success or failure of securing the control right or releasing the control right in the server by the client;
A control right status holding unit that holds the current control right status of the client in the server in the server; and the client side exclusive control management unit issues the control right securing request and the control right release request from the client to the server. Then, based on the current control right state by the client held by the control right state holding unit,
A server-side exclusive control processing unit that performs the response indicating either success or failure in securing the control right or releasing the control right for the client that issued the control right securing request or the control right release request. Things.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. FIG. 1 is a configuration diagram of a client-server system for describing a method and apparatus for managing a communication network between a client and a server according to the first embodiment. In FIG. 1, 1 is a plurality of clients, and 2 is a server. These client 1 and server 2 are connected by a communication network.

FIG. 2 is a functional block diagram showing a configuration of a client 1 and a server 2 which are devices for realizing a method for managing a communication network between a client and a server according to the first embodiment. In FIG. 2, reference numeral 11 denotes an exclusive control management unit (client-side exclusive control management unit) of the client 1, and 12 denotes a server information holding unit. The client 1 is composed of a plurality. Reference numeral 13 denotes an exclusive control processing unit (server-side exclusive control processing unit) of the server 2, and reference numeral 14 denotes a control right status holding unit. Note that the server 2 is singularly configured.

Next, the operation will be described. In FIG. 2, when one client 1 issues a control right securing request to the server 2, first, the exclusive control management unit 11 causes the server information holding unit 12 to hold server information indicating the server 2 to be controlled. After that, a control right securing request is made to the server 2. Note that the control right securing request includes client information indicating the client 1 that has issued the control right securing request. In the server 2, upon receiving the control right securing request from the client 1, the exclusive control processing unit 13 inquires the control right state holding unit 14 about the current control right state.

The control right status held by the control right status holding unit 14 has two values. When the control right is not secured, the value is "0". When the control right is already secured by the client 1, the value becomes "0". The value is client information indicating the client 1 that has issued the control right securing request.

When the control right status is inquired to the control right status holding unit 14 and the answer is “0”, it indicates that the server 2 has not obtained the control right from any client 1. In this case, the exclusive control processing unit 13 changes the control right status of the control right status holding unit 14 to client information indicating the client 1 which has issued the control right securing request, and confirms that the control right securing succeeded. A response is sent to the exclusive control management unit 11 of the client 1 which has issued the control right securing request. Note that the control right securing response is
Indicates either secure success or secure failure.

The exclusive control management unit 11 compares the server information indicating the server 2 to be controlled held in the server information holding unit 12 with the source of the control right securing response sent from the server 2 and secures the control right. If the response is successful, it recognizes that the control right has been secured.

In the server 2, when the control right status is inquired to the control right status holding unit 14, the response is different from the client 1 which has issued the control right securing request.
Indicates that the server 2 has already secured the control right by the different client 1. The exclusive control processing unit 13 keeps the control right status of the control right status holding unit 14 as the client information indicating the different client 1 and notifies the control right reservation request by a control right reservation response that the control right reservation has failed. A response is sent to the exclusive control management unit 11 of the issuing client 1.

The exclusive control management unit 11 of the client 1 compares the server information indicating the server 2 to be controlled held in the server information holding unit 12 with the source of the control right securing response sent from the server 2, If the control right securing response fails, the server 2 recognizes that the control right could not be secured. When the control right can be secured for the server 2, thereafter, control such as actual data setting is performed on the server 2.

In FIG. 2, a client 1 is a server 2
When the control right release request is executed for the server 2, the exclusive control management unit 11 first holds the server information indicating the server 2 to be controlled in the server information holding unit 12, and then controls the server 2. Make a release request. Note that the control right release request includes client information indicating the client 1 that has issued the control right release request.

When the server 2 receives the control right release request from the client 1, the exclusive control processing unit 13 inquires the control right state holding unit 14 about the current control right state. As a result of inquiring the control right status holding unit 14 about the control right, if the answer is “0”, it indicates that the server 2 has not secured the control right from any client 1. Therefore, the exclusive control processing unit 13 keeps the control right state of the control right state holding unit 14 at “0”, and transmits the control right release request by a control right release response indicating that the release of the control right is successful. Responds to the exclusive control manager 11 of the client 1.

The exclusive control manager 11 of the client 1
Then, the server information indicating the server 2 to be controlled held in the server information holding unit 12 is compared with the source of the control right release response returned from the server 2, and if the control right release response is successful, the server 2 Recognizes that he has released control.

The control right status holding unit 14 is inquired of the control right status, and the answer is client information indicating the client 1 that has issued the control right securing request, and client information indicating the client 1 that has issued the control right release request. If they match, the exclusive control processing unit 13 sets the control right status of the control right status holding unit 14 to “0”, and notifies the client 1 that the release of the control right is successful by the control right release response.
To the exclusive control management unit 11 of.

The control right status holding unit 14 is inquired about the control right status, and the answer is client information indicating the client 1 that has issued the control right securing request, and client information indicating the client 1 that has issued the control right release request. If they do not match, it indicates that the server 2 has secured the control right by another client 1. The exclusive control processing unit 13 keeps the control right state of the control right state holding unit 14 at the previous value, and notifies the client 1 that issued the control right release request by a control right release response that the release of the control right has failed. Responds to the control management unit 11.

Exclusive control management section 11 of client 1
Then, the server information indicating the server 2 to be controlled held in the server information holding unit 12 is compared with the source of the control right release response returned from the server 2, and if the control right release response fails, the control right The server 2 recognizes that the control right could not be released in response to the release request.

As described above, according to the first embodiment, the server 2 does not allow control from different clients 1 at the same time, and if each client 1 cannot secure the control right of the server 2 to be controlled, Since control of the server 2 is not performed, a method and apparatus for managing a communication network between a client and a server that can prevent simultaneous control of the server 2 can be obtained.

Embodiment 2 FIG. 3 shows Embodiment 2 of the present invention.
1 is a configuration diagram of a client-server system for describing a communication network management method and apparatus between a client and a server. As shown in FIG. 3, the client-server system according to the second embodiment includes a plurality of clients 1 for controlling and a plurality of servers 2 for providing information.

FIG. 4 is a functional block diagram of a client 1 and a server 2 which are devices for realizing a method for managing a communication network between a client and a server according to the second embodiment. 4, the same or corresponding parts as those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 4, reference numeral 21 denotes an exclusive control management unit (client-side exclusive control management unit) of the client 1, and reference numeral 22 denotes a server information holding unit. In the client server system according to the second embodiment, a plurality of clients 1 are provided. The server 2 includes an exclusive control processing unit 13 and a control right status holding unit 14.
And the server 2 is also composed of a plurality.

Next, the operation will be described. In FIG. 4, when a client 1 among the plurality of clients 1 issues a control right securing request to each server 2, first, the exclusive control management unit 21 sends the server information holding unit 22.
Then, server information indicating the server 2 to be controlled is held, and then a control right securing request is issued to each server 2. Note that the control right securing request includes client information indicating the client 1 that has issued the control right securing request.

When each server 2 receives the control right securing request from the client 1, the exclusive control processing unit 13 inquires the control right state holding unit 14 about the current control right state.

Each server 2 responds to the exclusive control manager 21 of the client 1 with either success or failure in securing the control right according to the control right status of the control right status holding unit 14.

The exclusive control manager 21 of the client 1
When a part or all of the control right securing responses among the control right securing responses from the respective servers 2 that have attempted to secure the control right fail, the control right Judge as failure to secure.

In this case, the exclusive control management unit 21 of the client 1 determines, from among the servers 2 that have attempted to secure the control right, only the server 2 for which the control right has been successfully secured.
It is possible to issue a control right release request to release the control right.

As described above, according to the second embodiment, the server 2 does not allow control from different clients at the same time, and each client 1 can secure the control right in the server 2 to be controlled. Since the control is performed only on the server 2, there is an effect that a communication network management method and apparatus between the client and the server that can prevent simultaneous control by different clients 1 on each server 2 can be obtained.

Embodiment 3 In the method and apparatus for managing a communication network between a client and a server according to the second embodiment, the exclusive control management unit 21 of the client 1 determines one of the control right securing responses from the plurality of servers 2 that has attempted to secure the control right. If the control right securing response from some or all of the servers 2 fails, it is determined that the control right securing failure has failed for the server 2 for which the control right securing response has failed, but the control right securing from some of the servers 2 has failed. Even if the response is unsuccessful, it is determined that the control right has failed to be secured for all the servers 2 that have attempted to secure the control right. The control right is also released for the server 2 for which the server 2 has succeeded.

Therefore, according to the third embodiment, each server 2 does not allow control from different clients 1 at the same time, and each client 1 can secure control right to all servers 2 to be controlled. Only when this is the case, the control is performed on all the servers 2.
There is an effect that a method and apparatus for managing a communication network between a client and a server that can prevent simultaneous control by the user can be obtained.

Embodiment 4 FIG. In the method and apparatus for managing a communication network between a client and a server according to the second embodiment, the exclusive control management unit 21 of the client 1 determines one of the control right securing responses from the plurality of servers 2 that has attempted to secure the control right. In the case where the control right securing response from all or all of the servers 2 has failed, it is determined that the control right securing failure has failed for the server 2 in which the control right securing response has failed. This is a case where the control right is to be secured for all the servers 2. Even when the control right is secured for only some of the servers 2 in an attempt to secure the control right for all the servers 2 on this communication network. Also, the server 2 that has secured the control right releases the control right as a failure to secure the control right.

Therefore, according to the fourth embodiment, all servers 2 on the communication network do not allow control from different clients 1 at the same time, and each client 1 does not allow control on all communication networks to be controlled. Only when the control right to the server 2 can be secured, control is performed for all the servers 2, so that simultaneous control by different clients 1 for all the servers 2 on the communication network to be controlled is prevented. There is an effect that a communication network management method and apparatus between a client and a server that can be obtained are obtained.

[0042]

As described above, according to the present invention, server information indicating a server to be controlled is held on the client side, and a control right securing request and a control right release request are issued to the server by the client. When the server receives the control right securing request or the control right releasing request, the server obtains the control right securing request or the control right based on the current control right status of the client held by the server. A response indicating success or failure of securing the control right or releasing the control right to the client that issued the release request is performed, and based on the server information held on the client side and the response from the server, Since the client side recognizes the success or failure of securing control right or releasing control right in the server, Prevents simultaneous control is performed to the one server, there is an effect to be possible without the exclusive control for the same server mediated human judgment.

According to the present invention, when the server receives a control right securing request or a control right release request from a client, the current control right status of the client held on the server side is changed to any other than the client. On the condition that the control right is not secured even by the client of the control right, the control right securing request or the control right release request is sent to the client that has issued the control right securing or control right release response. Therefore, another client cannot gain control or release control over a server for which another client has control,
Simultaneous control is not performed from a plurality of clients to the same server, so that there is an effect that exclusive control of the same server can be performed without human intervention.

According to the present invention, when the server receives the control right release request from the client, the control right status of the client held by the server is changed to a state in which the control right is secured by the client. If so, the control right status of the current client held on the server side is rewritten to a control right status indicating that control right is not secured by any client including the client, and the control right release request is issued. Since a response indicating success in releasing the control right is sent to the issued client, the control right can be released by the client to the server in which the client has the control right, and the same server can be released to the same server. Simultaneous control is not performed from multiple clients, and the same Exclusive control is effective becomes possible without intervening judgment of the person against.

According to the present invention, when a response indicating the success of the control right reservation is made in response to the control right reservation request from the client, the control right reservation request is issued with the information indicating the current control right state by the client. Since the client information is rewritten to the client information, another client cannot secure the control right to the server where the other client has the control right, and the same server is controlled simultaneously by multiple clients. This has the effect that exclusive control of the same server can be performed without human intervention.

According to this invention, the server information indicating the server to be controlled, which is held by the server, is compared with the transmission source of the control right securing response and the control right releasing response returned from the server, and the control right securing is obtained. If the control right securing response or the control right release response from the request destination or the control right release request destination is successful, the control right to the server is secured or the control right is recognized, and the control right is released. When the secure response or the control right release response fails, the control right to the server and the release of the control right are recognized to be unsuccessful, so that each client can recognize the securement of the control right. , Or a server whose release of the control right can be recognized can be set as a control target, so that simultaneous control is not performed from a plurality of clients to the same server. There is an effect to be possible without other control mediated human judgment.

According to the present invention, control is performed only for the server for which the reservation of the control right can be recognized.
The client does not control the other servers for which the control right cannot be recognized.If there are multiple servers that the client intends to control, if the server whose control right is recognized cannot be This makes it possible to perform exclusive control only on the same server, so that exclusive control on the same server can be performed without human intervention.

According to the present invention, when the securing of the control right has failed for another server, it is considered that the securing of the control right has failed even for the server whose securing of the control right has been recognized in the confirmation step. Since the control right secured for the server is released, if the control right cannot be secured for all the servers to be controlled by the client, the client releases the control right for all the servers. This has the effect of enabling exclusive control of the same server without increasing the communication load of the network and without human intervention.

According to the present invention, a server information holding unit for holding server information indicating a server to be controlled on the client side, and a control right securing request or a control right release request to the server from the client to the server. Performing, based on the server information held by the server information holding unit, and a response indicating success or failure of securing control right or release of control right for the client from the server, A client-side exclusive control management unit that recognizes success or failure of securing or releasing control right in the server, a control-right state holding unit that retains the current control right state of the server in the server, and the client-side exclusion. A request for securing the control right from the client to the server by a control management unit, When the control right release request is issued, the control right securing request or the control right release request is issued to the client based on the current control right status of the client held by the control right state holding unit. Since it is configured to include the server-side exclusive control processing unit that performs the response indicating either success or failure in securing control right or releasing control right, simultaneous control is performed from a plurality of clients to the same server. This has the effect of enabling exclusive control of the same server without human intervention.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a client server system for describing a method and an apparatus for managing a communication network between a client and a server according to a first embodiment of the present invention;

FIG. 2 is a functional block diagram showing a configuration of a client and a server, which are devices for realizing a method for managing a communication network between a client and a server according to the first embodiment of the present invention;

FIG. 3 is a configuration diagram of a client-server system for describing a method and apparatus for managing a communication network between a client and a server according to a second embodiment of the present invention;

FIG. 4 is a diagram illustrating a client / client according to the second embodiment of the present invention;
FIG. 2 is a functional block diagram illustrating a configuration of a client and a server, which are devices for implementing a communication network management method between servers.

FIG. 5 is a configuration diagram of a conventional client server system.

FIG. 6 is a configuration diagram of a conventional client server system.

[Explanation of symbols]

1 client, 2 servers, 11 and 21 exclusive control manager (client-side exclusive control manager), 12 and 22
Server information holding unit, 13 exclusive control processing unit (server-side exclusive control processing unit), 14 control right status holding unit;

Claims (8)

[Claims] 1. A requesting step in which server information indicating a server to be controlled is held on a client side, and a request for securing control right or a request for releasing control right is issued from the client to the server; When the control right securing request or the control right releasing request is received from the server, the control right securing request or the control right releasing request is issued based on the current control right state by the client held on the server side. A response step of performing a response indicating either success or failure of securing control right or releasing control right to the client; based on the server information held on the client side and the response from the server, A confirmation step for recognizing success or failure of securing or releasing control right in the server by the client. Communication network management method between client and server. 2. In the response step, when the server receives a control right securing request or a control right release request from a client, the current control right status of the client held by the server is changed to any other than the client. On the condition that the control right has not been secured even by the client, a response indicating success in securing the control right or releasing the control right is sent to the client that issued the control right securing request or the control right release request. 2. The method for managing a communication network between a client and a server according to claim 1, wherein: 3. In the response step, when the server receives the control right release request from the client, the current control right status of the client held on the server side is changed to a state in which the control right is secured by the client. If so, the control right status of the current client held on the server side is rewritten to a control right status indicating that control right is not secured by any client including the client, and the control right release request is issued. 3. The client according to claim 1, wherein a response indicating success in releasing the control right is sent to the issued client.
Communication network management method between servers. In the response step, when a response indicating success in securing the control right is made in response to the control right securing request from the client, the control right securing request is issued with information indicating the current control right status by the client. 3. The client according to claim 2, wherein the client information is rewritten to client information about the client.
Communication network management method between servers. 5. In the confirmation step, the server information indicating the server to be controlled, which is held on the server side, is compared with the transmission source of the control right securing response or the control right releasing response returned from the server, and the control right securing is performed. If the control right securing response or the control right releasing response from the request destination or the control right release request destination is successful, the control right for the server is secured, and it is recognized that the control right has been released, and the control right securing is secured. The method according to any one of claims 1 to 4, wherein when the response or the control right release response fails, it is recognized that securing of the control right to the server or release of the control right was unsuccessful. 9. The method for managing a communication network between a client and a server according to claim 1. 6. The communication network management method according to claim 5, further comprising a control step of controlling only the server for which the control right is recognized in the confirmation step. 7. When securing of the control right for another server fails, it is considered that the securement of the control right has failed for the server for which the securement of the control right has been recognized in the confirmation step, and the server is secured. 6. A server control step for releasing a control right.
A method for managing a communication network between a client and a server as described in the above. 8. A server information holding unit that holds server information indicating a server to be controlled on a client side, and issues a control right securing request and a control right release request to the server from the client to the server. Based on the server information held by the information holding unit and a response indicating success or failure of securing or canceling the control right from the server to the client, the control right of the server by the client. A client-side exclusive control management unit that recognizes success or failure of securing and release of control right, a control right state holding unit that holds the current control right status of the client in the server, and the client-side exclusive control management unit The control right securing request or the control right release request from the client to the server. When a request is made, based on the current control right status of the client held by the control right status holding unit, control right reservation for the client that issued the control right reservation request or the control right release request, A server-side exclusive control processing unit that performs the response indicating either success or failure in releasing the control right.