KR100428777B1 - Method for Synchronization Between Client of Client/Server System - Google Patents

Abstract

The present invention relates to a method of synchronizing between clients of a client / server system. More specifically, in a client / server system composed of a plurality of clients and servers, a response range item is provided for each client to request and report to the server. In the method of synchronizing between the client and the client system of the client / server system, the server transmits a response message for the message transmitted from each client to the client corresponding to the response range when the message is transmitted to the server through the inserted message. It is about.

According to the present invention, since the processing response message of the server is transmitted only to the clients requiring the response of the server, unnecessary message transmission operations can be prevented, and for matters requiring synchronization of all clients such as alerts and failures of a specific client, Since the server notifies all the clients by broadcasting the contents, there is no need for the polling operation of the client, which significantly reduces the load on the network and the system.

Description

Method for Synchronization Between Client of Client / Server System}

According to the present invention, in a client / server system composed of a plurality of clients and servers, when each client transmits a request and report to the server through a message in which a response range item is inserted, the server transmits from each client. The present invention relates to a method for synchronizing between clients of a client / server system, comprising transmitting a response message of a message to a client corresponding to the response range item.

In general, a network management system (NMS: Network Management System (NMS)), which is used by a network manager or sysop to control a communication network, is implemented in a client / server system structure.

In general, such a client / server system has a structure in which a single server manages a plurality of clients in a batch, and each client and server recognizes each other's various information such as setting, inquiry, and failure status of each client that changes from time to time. It must be synchronized with each other in order to share status information.

The synchronization method in the conventional client / server system can be largely divided into two methods, as shown in FIGS. 1 and 2.

In the first method, as shown in FIG. 1, in order to synchronize with each other, each client 20 periodically polls the server 10 to check its status.

Here, polling is a transmission control method that continuously checks the state of other programs or devices in one program or device. The server checks whether the client is still connected and wants to transmit data.

However, in this method, since all clients 20 must poll each server 10 at regular intervals, it may be time consuming depending on the amount of data.

In addition, even if there is no change in the state, it is necessary to perform a state check through polling the server 10 at every cycle, so that communication processors to perform polling are performed even if they are not actually necessary, and thus unnecessary costs are required. Problems that occur occur.

In the second method, in order to match the information between the client 20 and the server 10, as shown in FIG. 2, whenever there is a change in the information of the specific client 20a grasped by the server 10, the server 10 ) Sends a process report message to all clients 20 to report the change.

However, even in such a case, since the report of the server 10 is performed even for the client that does not need the information on the change report, the use of this method frequently results in unnecessary message transmission, which incurs an increase in the load of the communication network. have.

As described above, in the conventional client / server system used for NMS, the synchronization method between clients has a disadvantage of continuously polling at regular intervals or unnecessary message delivery. Therefore, the load of the system depends on the number of clients. Unnecessarily weighted problems arise.

The present invention was devised to solve these problems, and the network and system significantly reduce the load by eliminating the problem of periodic polling and the transmission of unnecessary messages during synchronization between clients of the client / server system used for NMS. An object of the present invention is to provide a synchronization method of a client / server system that enables efficient synchronization.

1 is a conceptual diagram illustrating a synchronization method between clients in a conventional client / server system;

2 is a conceptual diagram illustrating another synchronization method between clients in a conventional client / server system;

3A and 3B are conceptual views illustrating a synchronization method of a client / server system according to a preferred embodiment of the present invention.

4 is an exemplary view showing an example of a client state table;

5 is an exemplary diagram illustrating a response range item inserted in a message such as various inquiries, settings, and failure states transmitted from a client to a server;

6 is a flowchart illustrating a synchronization method of a client / server system according to a preferred embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: server

20: client

30: Client Status Table

In order to achieve the above object, the present invention provides a method for synchronizing each client in a client / server system composed of a plurality of clients and servers, wherein each client receives a message in which a response range item is inserted. And transmitting the processing result response message for the message transmitted from each client to the client corresponding to the response range item.

In this case, the above-mentioned response range item may be set to 'self ID' requesting the server to transmit the response message only to the corresponding client that sent the message, or 'broadcasting' to request the server to transmit the response message to all the clients. The 'self ID' is mainly set as a response range item when a general inquiry and setting request message is transmitted from a client to a server, and the 'broadcast' is mainly used as a response range item when sending an alarm and a failure message of the client. Set it.

Therefore, when the response range item of the message sent from the client is 'self ID', the server sends a processing response message for the transmitted message to the corresponding client, and the response range item of the message sent from the client is 'broadcasted'. In this case, all of the process response messages for the transmitted messages are transmitted to the plurality of clients.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

In addition, it should be noted that the same reference numerals are given to the same components, although belonging to different drawings for convenience of understanding.

3A and 3B are conceptual views of a method for synchronizing a client / server system according to a preferred embodiment of the present invention. In a client / server system including a plurality of clients 20 and a single server 10, a server (for synchronization) may be used. 10) it should be possible to link the information with the client state table 30 that manages the state of the clients 20 collectively.

4 is an exemplary view showing an example of a client state table 30 linked with the server 10. The client state table 30 includes a unique code of each client 20, that is, an ID and an IP address. IP Address) and the current state of the client 20.

The client state table 30 is changed and managed whenever the server 10 makes a message connection with each client 20. The server 10 utilizes this information as a commercial database or external information to determine a specific state. The operation state of the client 20a is indicated.

In addition, a response range item for designating a transmission range of the response message of the server 10 is inserted into a message such as various inquiries, settings, and failure states transmitted from each client 20 to the server 10 as shown in FIG. 5.

The response range item may be set to be divided into 'MyID' and 'Broadcast' according to the synchronization between each client 20. The 'self ID' is not required to be synchronized. This is the case where the server 10 needs to send a processing response message only to the client 20a for a message sent by a specific client 20a, such as various inquiry and setting commands, and 'broadcasting' must be performed in synchronization. In other words, it corresponds to a case in which the other clients 20 need to be aware of the contents, such as an alarm and a failure message.

Therefore, as shown in FIG. 3A, when a specific client 20a transmits a general inquiry and setting message together with a 'self ID' item to the server, the server 10 transmits the processing result only to the corresponding client 20a. As shown in FIG. 3B, when a report on an alarm and a failure situation of a specific client 20a is transmitted to the server 10 together with the 'broadcast' item, the server 10 transmits the processing result to all other clients 20. Synchronize.

6 is a flowchart illustrating a synchronization method of a client / server system according to a preferred embodiment of the present invention.

First, any specific client 20a of the clients 20 sets a 'self ID' and a 'broadcast' according to the contents of the message to be transmitted to the server 10 and inserts the message into the response range item of the message to the server ( 10) (step: S1).

That is, a response range item is set to 'self ID' for a message that does not require notification to other clients 20, such as a general inquiry and setting message to the server 10, and another client 20 such as an alarm and a failure message. If a notification is also required, the message is set to 'broadcast' and transmitted to the server 10.

At this time, if the inquiry and setting message set to 'self ID' is received by the server 10, the server 10 performs the processing on the received message (step: S5), and the processing result is added to the processing response message. Only the client 20a transmits it (step S6).

Therefore, since the processing response message is not transmitted to other clients irrelevant to the processing result, unnecessary message transmission is reduced and communication network load is reduced.

On the other hand, if a failure message set to 'broadcast' from the client 20a, such as an alarm and failure message, is sent to the server 10, the server 10 receives this message and the response range item of the message is 'broadcast'. After confirming that the 'Cast' (step: S2), in the client status table 30, the status information of the client 20a is changed according to the contents included in the alarm and failure message (step: S3), and the changed client The process report message is transmitted to all clients 20 currently operating in the state table 30 to notify the failure of the client 20a (step: S4).

Receiving the client 20 can determine the failure of the client (20a), and can take actions accordingly in the same way, so that without having to poll to the client status table 30 of the database 20 Data is synchronized and synchronized.

Although the preferred embodiments of the present invention have been described in detail above, those skilled in the art will appreciate that the present invention may be modified without departing from the spirit and scope of the invention as defined in the appended claims. It will be appreciated that modifications or variations may be made. Therefore, changes in the future embodiments of the present invention will not be able to escape the technology of the present invention.

As described above, according to the present invention, a response range item classified as 'self ID' or 'broadcast' is inserted into various messages transmitted from the client to the server, and the response range item is designated as 'self' in general inquiry and setting request messages. ID 'to send the server's processing response message only to the client, and set the response range item to' broadcast 'for messages such as alerts and fault messages so that the server's response message is sent to all clients. As you can see, it performs synchronization between each client.

In this way, the response range of the message is divided into 'self ID' and 'broadcast' according to the necessity of synchronization between each client of the client / server system. Can prevent the operation.

In addition, when all clients need to be synchronized, such as alerts and failures of specific clients, the server notifies all clients by broadcasting them, thus eliminating the need for client polling and significantly reducing network and system load. There is an advantage that efficient synchronization can be performed.

Claims (4)

In the method of synchronizing each client of a client / server system composed of a plurality of clients and servers, Transmitting, by the client, the content to be requested and reported to the server to the server through a message in which a response range item is inserted; And transmitting, by the server, a processing result response message for the message transmitted from each client to a client corresponding to the response range item. The method of claim 1, wherein the response range item, Client / server, characterized in that it is set to any one of the 'self ID' for requesting the server to send the response message to the client that sent the message, and the 'broadcast' to request the server to send the response message to the plurality of clients. Method of synchronization between each client of the system. The method of claim 2, wherein the 'self ID' is set as a response range item when the general inquiry and setting request message is transmitted from the client to the server, and the 'broadcasting' indicates an alarm and failure occurrence message of the client. A method of synchronizing each client of a client / server system, characterized in that the response range is set during transmission. The method of claim 1 or 3, wherein the transmitting of the response message comprises: If the response range item of the message sent from the client is 'self ID', the processing response message for the transmitted message is transmitted to the client, and the response range item of the message sent from the client is 'broadcast'. In the case, all the response response message for the transmitted message to the plurality of clients, characterized in that the synchronization method between each client of the client / server system.