KR20060080780A - A method and apparatus for role management in duplicated system - Google Patents

Abstract

The present invention provides a system for managing a role of a corresponding module through state information of duplication groups composed of duplex modules. A role database block for storing redundancy information consisting of state information for each redundancy group, receiving role queries from the duplicated modules, determining a role of the corresponding module through the redundancy information, and determining the determined role. It is configured to include the role manager for notifying the relevant module is configured to remove the delay waiting for a certain time to receive the status information of the status module of the status module that is uncertain whether existed in the existing primary module selection process, Modules provide fast service startup and full system loading Time can be greatly reduced, and more stable service can be provided by preventing abnormal state transition of the system due to the loss of state information generated during the primary module selection process.

CDMA, Primary, Back-Up, Duplicated Module

Description

A Method and Apparatus For Role Management In Duplicated System             

1 is a block diagram of a general redundant communication system.

2 is a block diagram of a redundant communication system according to a preferred embodiment of the present invention.

3 illustrates the operation of a role manager in accordance with a preferred embodiment of the present invention.

The present invention relates to a redundant mobile communication system, and more particularly, to a method and apparatus for managing a role of modules of the redundant mobile communication system.

In general, when an error occurs in a communication system, when a service of the communication system is in progress, a situation in which the service can not continue anymore occurs, and the error causes a fatal loss to the communication system. In this case, there is a need to ensure a high level of availability in the communication systems in order to continue to provide the service in progress and to reduce the losses. Thus, to ensure availability, systems are designed to prevent the failure of a particular module from spreading to the failure of the entire system through redundancy or multiplexing of the modules which may cause the failure.

This duplication structure includes a primary-backup structure that utilizes data backup by a processor communication module. In this case, a process of selecting a primary module that preferentially processes a client's request is required, and at the same time, the loaded redundant processor requires mutual agreement and a certain level of information exchange to select a primary module. In other words, the processor which started loading should be asked whether there is a processor to be duplicated with itself, and also have to be guaranteed whether it can play a primary role in the current redundant structure.

The primary information exchange is based on communication over the network, which entails network delays and processing delays in the process. Therefore, a waiting time for receiving status information between certain duplication processes is required in order to prepare for a total delay and to ensure stable information exchange. In particular, more waiting time is required to receive status information of other members in the same redundancy group whose existence is uncertain.

In addition, when a plurality of duplication modules exist in a single duplication process, since a delay time of receiving state information of each duplication module is accumulated, a serious loading time delay is caused. This reception latency may be determined by various tests, in which case different values may be required depending on the load of the system. In addition, the state information exchange method between the redundant modules has a problem that the activation mode of the system can be abnormally transitioned due to the loss of messages in the network.

Therefore, an object of the present invention, which was created to solve the problems of the prior art operating as described above, can advance the service start time by eliminating the state information and the reception waiting time between the processes required for the primary module selection process. It is to provide a method and apparatus.

It is another object of the present invention to provide a method and apparatus that can shorten the overall system loading time by minimizing the cumulative delay time by multiple redundant modules included in one process.

It is still another object of the present invention to provide a method for preventing the transition to an abnormal state because it is not possible to accurately determine whether the presence or absence of the presence in the same redundant group on the network is lost.

Apparatus according to an embodiment of the present invention created to achieve the object as described above,

In the redundancy system that manages the role of the corresponding module through the status information of the redundancy groups composed of duplicated modules,

A role database block for dividing member information for distinguishing modules constituting each of the redundancy groups and redundancy information composed of state information of each of the modules for each redundancy group;

And a role manager for receiving role queries from the redundant modules, determining a role of the corresponding module through the duplication information, and notifying the determined role to the corresponding module.

In the method according to an embodiment of the present invention, in the method for managing the role of the corresponding module through the status information of the redundancy groups composed of the redundant module in the redundancy system,

Dividing and collecting member information for dividing modules constituting each of the duplication groups and duplication information composed of state information of each module for each duplication group;

Receiving role queries from the duplicated modules,

Determining the role of the module based on the duplication information;

It characterized in that it comprises a process of notifying the determined role to the module.

Hereinafter, with reference to the accompanying drawings will be described in detail the operating principle of the preferred embodiment of the present invention. Like reference numerals refer to the same elements as shown in the drawings, even though they may be shown on different drawings, and in the following description of the present invention, a detailed description of related well-known functions or constructions will be directed to the gist of the present invention. If it is determined that it can be unnecessarily blurred, detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

1 is a block diagram of a general redundant communication system.

Referring to FIG. 1, a communication system includes two processors 1 and 2 110 and 120, and a module 1 132 of the modules of the processor 1 110 and a module of the processors 2 120. 2 134 is a component of redundancy group 130.

Time Delay (hereinafter referred to as 'td') 148 is a waiting time for receiving status information from other unidentified members in the redundancy group 130, which is closely related to the start time of the service and the loading time of the entire system. It is related.

Hereinafter, a general primary module selection procedure will be described.

In steps 140 to 142, the module 1 132 or the module 2 134 transmits an 'initial selection message' to the module 2 134 or the module 1 132 to participate in the primary module selection.

If the final primary module among the modules 132 and 134 in the redundancy group requesting the primary module election is determined through the initial election message, an election completion message indicating the final primary module determined in steps 144 to 146. 'Is received by the module 1 or module 2 (132, 134), respectively. At this time, the elected completion message is delayed by td 148 generated from other unidentified members in the duplication group 130, and then received by the module 1 132 or the module 2 134, respectively.

 As shown in FIG. 1, the primary module selection time is delayed due to the td 148 generated during the election of the primary module among the duplicated processes.

Accordingly, the present invention improves the overall system loading time by shortening the selection time of the primary module to handle the client's request, and in order to prevent abnormal primary module selection due to data loss, Propose the role manager in charge. The role manager constructs and stores 'redundancy information' composed of status information of each duplication module composed of multiple duplication modules and member information of a group constituting duplication, and stores the stored duplication information. Based on these information, basic information for assigning or receiving role of each member is provided according to client's request.

Subsequently, when a preceding member who is authenticated as a primary is created, the role manager updates information indicating that the created member is a primary in its redundancy information area, and then a primary of another member of the same redundancy group. If there is a request for election, it informs that a member has already been assigned a primary role.

2 is a block diagram of a redundant communication system according to a preferred embodiment of the present invention.

Referring to FIG. 2, the communication system includes two processors 1, 2, 210, and 220, and a module 1 232 of the modules of the processor 1 210 and a module of the processors 2, 220. 2 234 are members of redundancy group 230. There may be a plurality of members of the redundancy group 230 that are not identified in addition to the module 1 232 and the module 2 234.

The role database block 240 includes member information of a redundancy group consisting of Module 1 232 and Module 2 234 constituting the redundancy group 230, and the Module 1 232 and Module 2 234. Structured and stored 'redundancy information' including each state information.

The role manager 242 distinguishes each replication group distributed in the system by using a key value representing each replication group. The role manager 242 may allocate a role of the module 1 232 and the module 2 234 or may be assigned a role according to a request of a client based on duplication information of the role data block 240. Provides basic information, and is responsible for the selection of the primary module of the modules 1,2 (232,234).

 Specifically, the role manager 242 initially generates redundancy information for the modules 1,2 and 232 and 234 at the time of registering the service location of each module and stores the redundancy information in the role database block 240. In other words, it uses the characteristics of a naming server used to secure location transparency adopted by general distributed environment systems.

 Each of the modules 1, 2, 232, 234 registers its serviceable location in a naming service and simultaneously transmits information about the duplication group 230 managed by the role manager 242 before starting the service. In addition, the module 1,2 (232,234) performs a 'role query' asking the role manager 242 whether its role is a primary or a backup to complete the selection of the primary module.

Thereafter, the module 1 232 or the module 2 234 which has been assigned a role assignment or certification by the role manager 242 immediately changes its state to a primary or backup to start a corresponding service.

3 is a diagram illustrating an operation of a role manager according to an exemplary embodiment of the present invention.

Referring to FIG. 3, in step 310, the role manager collects duplication information of duplication groups and stores the duplication information in a role database block. Here, the duplication information indicates member information of modules constituting each of the duplication groups and state information of each of the modules.

In step 320, the role manager receives a 'role query' asking whether a primary is selected from the modules. In step 330, the role manager receiving the role query checks whether the state of the corresponding module has a primary qualification or a module to which the primary qualification is assigned in the duplication information of the role database block.

In step 340, the role manager notifies the module of the role of the module indicating whether the primary qualification is present. Upon receiving the role notification, the redundancy module immediately changes state to its role and starts a service.

As described above, through the duplication information of the role manager, by eliminating the waiting time for a certain time to receive the state information of the state module that is not known whether the presence required in the existing primary module selection process, the module of the duplication group They can significantly shorten the fast service start-up and load time of the entire system, and can provide a more stable service by preventing an abnormal state transition of the system due to the loss of state information generated during the primary module selection process.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by those equivalent to the scope of the claims.

In the present invention operating as described in detail above, the effects obtained by the representative ones of the disclosed inventions will be briefly described as follows.

The present invention provides a complete system by greatly reducing the initialization delay due to network communication required for exchanging state information, by omitting the process of primary selection of modules for starting a service by a process including multiple redundant modules. The loading time is greatly improved. In addition, by using the role manager that manages the redundant information in the process of storing and managing the existing service location information, there is an effect that can efficiently improve and manage the network resources required for role assignment.                     

In addition, there is an effect that the performance can be improved by greatly improving the cumulative delay that occurs in the process of selecting a primary module of a sequential structure of each redundant module, which is executed in a communication system process including multiple redundant modules. . In addition, it is possible to prevent an abnormal state transition of the system due to the loss of information generated during the exchange of state information when the initial primary module is selected, thereby providing a more efficient and stable service.

Claims (8)

In the redundancy system that manages the role of the corresponding module through the status information of the redundancy groups composed of duplicated modules, A role database block for dividing member information for distinguishing modules constituting each of the redundancy groups and redundancy information composed of state information of each of the modules for each redundancy group; And the role manager for receiving role queries from the redundant modules, determining the role of the module through the duplication information, and notifying the module of the determined role. The method of claim 1, wherein the role query, Device for the selection of the primary module of the duplicated module. The method of claim 1, wherein the role manager, The device characterized in that the module determines the role of the module by determining whether to perform the primary role or the backup role, based on the state information of the module that transmitted the role query in the duplication information. . According to claim 1, The module receiving the determined role, And act as a primary or a backup according to the determined role. In the method of managing the role of the corresponding module through the status information of the redundancy groups composed of duplicated modules in the redundant system, Dividing and collecting member information for dividing modules constituting each of the duplication groups and duplication information composed of state information of each module for each duplication group; Receiving role queries from the duplicated modules, Determining the role of the module based on the duplication information; The method comprising the step of notifying the determined role to the module. The method of claim 5, wherein the role query, Method for selecting a primary module of the duplicated module. The method of claim 5, wherein the determining is, A method for determining the role of the module by determining whether the module performs the primary role or the backup role, based on the state information of the corresponding module that has transmitted the role query in the duplication information. . According to claim 1, The module receiving the determined role, If it is a primary or backup according to the determined role

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