CN107196987A - The switching method and server of a kind of pair of centring system - Google Patents

Abstract

The invention relates to the field of communication technology, and discloses a switching method and server of a dual-center system, including: after the dual-center switching server receives a switching request instruction, the status flag bits of each application in the dual-center system are set from the normal state to Switching the state, so that each application stops processing data according to the state flag; the dual-center switching server determines the second application to be switched, and connects the first application connected with the second application to the second application The connection switching between the first application and the third application is the connection between the first application and the third application, and the third application is the backup application of the second application; after the dual-center switching server determines that the switching is completed, each application The status flag bit is set from toggle state to normal state. The invention is used to solve the problems of long time-consuming system switching process and high database connection pressure in the prior art.

Description

Switching method and server of a dual-center system

technical field

The invention relates to the technical field of communication, in particular to a switching method and a server of a dual-center system.

Background technique

In order to prevent the interruption of Internet services and improve the stability of network services, a dual-center system is deployed online, including the main application cluster and the standby application cluster. Generally, the data request is processed by the main application cluster. When the main application fails, such as database downtime, APP (Application, Application) application failure, etc., it can be switched between the dual-center systems, that is, the service request is switched to the standby application. At the same time, the main application cluster no longer processes data requests, so that the standby application cluster can provide network services.

To switch between traditional dual-center systems, it is necessary to stop each application in the dual-center system, make corresponding configuration changes, and then restart. Specifically, when switching databases, in order to prevent new operations in the foreground, front-end access should be prohibited and WEB (Internet) applications should be closed during switching; in order to ensure that the data in the primary and standby databases is still, all background applications such as APPs should be closed; in order to ensure The stored data is consistent, and the database synchronization application needs to be closed; in addition, when the standby database is changed to the primary database, the database configuration of the APP, that is, the background application, needs to be modified and the application republished, so that the system can be used normally.

The above switching method has certain problems for high-concurrency real-time systems. Since the current communication system is relatively large in scale and includes multiple large application systems, it takes a long time to stop and start the loading process of the entire system, and it also takes a long time to modify the application configuration data. In addition, the database connection needs to be initialized during the system startup process. In the case of many applications, it will cause a large connection pressure on the database.

Contents of the invention

Embodiments of the present invention provide a dual-center system switching method and server to solve the problems in the prior art that the system switching process takes a long time and the database connection pressure is high.

The switching method of the dual-center system provided by the embodiment of the present invention includes:

After receiving the switching request instruction, the dual-center switching server sets the status flags of each application in the dual-center system from the normal state to the switching state, so that each application stops processing data according to the status flags;

The dual-center switching server determines the second application to be switched, and switches the connection between the first application connected to the second application and the second application to the first application and the third application The connection between the third application is the backup application of the second application;

After determining that the switching is completed, the dual-center switching server sets the status flags of each application from the switched state to the normal state.

Optionally, the dual-center system includes an Internet WEB server, an application program APP server and a database server connected in sequence;

The dual-center switching server sets the status flags of each application in the dual-center system from a normal state to a switching state, including:

The dual-center switching server sets the status flag of the WEB application corresponding to the WEB server from a normal state to a switching state;

After the first predetermined time, the dual-center switching server sets the status flag bit of the APP application corresponding to the APP server from the normal state to the switching state;

After the second predetermined time, the dual-center switching server sets the status flag bit of the database synchronization application corresponding to the database server from the normal state to the switching state;

Said setting the state flag bits of each application from the switching state to the normal state includes:

The dual-center switching server sets the status flag of the database synchronization application from the switching state to the normal state;

After the third predetermined time, the dual-center switching server sets the status flag of the APP application from the switching state to the normal state;

After the fourth predetermined time, the dual-center switching server sets the status flag bit of the WEB application from the switched state to the normal state.

Optionally, the first application is the APP application, the second application is the database synchronization application, and the first application connects to the second application through the Lightweight Directory Access Protocol LDAP;

The switching the connection between the first application connected to the second application and the second application to the connection between the first application and the third application includes:

The dual-center switching server switches the second application from the main application state to the standby application state, and after switching the third application from the standby application state to the main application state, directs the LDAP connection of the first application to , switching from the second application to the third application.

Optionally, the first application is the WEB application, the second application is the APP application, and the first application is connected to the second application through a load balancing server;

The switching the connection between the first application connected to the second application and the second application to the connection between the first application and the third application includes:

The dual-center switching server switches the second application from the main application state to the standby application state, and after switching the third application from the standby application state to the main application state, directs the connection of the load balancing server to Switch from the second application to the third application.

A switching method for a dual-center system, comprising:

After the first application determines that the dual-center switching server sets the state flag of the first application to the switching state, stop processing data;

If the application to be switched is a second application connected to the first application, the first application establishes a connection with a third application, and the third application is a backup application of the second application;

The first application starts to process data after determining that the dual-center switching server sets the status flag of the first application to a normal state, and the status flag of the first application is determined by the dual-center switching server It is set to the normal state after the switching is completed.

Optionally, after the first application determines that the dual-center switching server sets the status flag of the first application to the switching state, stop processing data, including:

The first application periodically obtains the status flag bit from the dual-center switching server;

After the first application receives the data, determine whether the acquired state flag is in a switching state;

Stop processing the data when it is determined that the acquired status flag bit is in a switching status.

Optionally, if the application to be switched is the second application connected to the first application, establishing a connection between the first application and the third application includes:

After the second application is switched from the main application state to the standby application state, and the third application is switched from the standby application state to the main application state, direct the connection of the first application to be switched by the second application for the third application.

Optionally, the dual-center system includes a WEB server, an APP server and a database server connected in sequence;

The first application is a WEB application on the WEB server or an APP application on the APP server;

The second application is an APP application on the APP server or a database synchronization application on the database server;

And, when the first application is the WEB application, the second application is the APP application; when the first application is the APP application, the second application is the database synchronization application .

A switching server of a dual-center system, comprising:

The setting module is used to set the state flags of each application in the dual-center system from the normal state to the switching state after receiving the switching request instruction, so that each application stops processing data according to the state flags; after determining that the switching is completed, Set the state flag bit of each application from the switching state to the normal state;

A connection module, configured to determine the second application to be switched, and switch the connection between the first application connected to the second application and the second application to between the first application and the third application The connection between the third application is the backup application of the second application.

Optionally, the setting module is specifically used for:

Setting the status flag bit of the WEB application corresponding to the WEB server from a normal state to a switching state;

After the first predetermined time, the status flag bit of the APP application corresponding to the APP server is set from the normal state to the switching state;

After the second predetermined time, the state flag bit of the database synchronization application corresponding to the database server is set to the switching state from the normal state;

Setting the state flag bit of the database synchronization application from the switching state to the normal state;

After the third predetermined time, the state flag bit of the APP application is set to a normal state from the switching state;

After the fourth predetermined time, set the status flag bit of the WEB application from the switched state to the normal state.

Optionally, the first application is the APP application, the second application is the database synchronization application, and the first application is connected to the second application through LDAP;

The connection module is specifically used for:

After the second application is switched from the main application state to the standby application state, and after the third application is switched from the standby application state to the main application state, the LDAP connection of the first application is pointed to by the second application The application is switched to the third application.

Optionally, the first application is the WEB application, the second application is the APP application, and the first application is connected to the second application through a load balancing server;

The connection module is specifically used for:

After the second application is switched from the main application state to the standby application state, and after the third application is switched from the standby application state to the main application state, the connection of the load balancing server is pointed to, and the second application Switch to the third application.

An application server of a dual center system, comprising:

A judging module, configured to stop processing data after determining that the dual-center switching server sets the status flag of the first application to a switching state; after determining that the dual-center switching server sets the status flag of the first application After being in a normal state, start processing data, and the state flag bit of the first application is set to a normal state after the dual-center switching server determines that the switching is completed;

An establishing module, configured to establish a connection with a third application if the application to be switched is a second application connected to the first application, and the third application is a standby application of the second application.

Optionally, the judging module is specifically used for:

Periodically obtain the status flag bit from the dual-center switching server;

After receiving the data, determine whether the acquired state flag is in a switching state;

Stop processing the data when it is determined that the acquired status flag bit is in a switching status.

Optionally, the building module is specifically used for:

After the second application is switched from the main application state to the standby application state, and the third application is switched from the standby application state to the main application state, direct the connection of the first application to be switched by the second application for the third application.

Optionally, the dual-center system includes a WEB server, an APP server and a database server connected in sequence;

The first application is a WEB application on the WEB server or an APP application on the APP server;

The second application is an APP application on the APP server or a database synchronization application on the database server;

And, when the first application is the WEB application, the second application is the APP application; when the first application is the APP application, the second application is the database synchronization application .

In the embodiment of the present invention, the status flag is introduced through the dual-center switching server, and the corresponding status flag is assigned to each application in the dual-center system, so that each application can process data according to the state of the corresponding status flag. The dual-center switching server receives the switching request instruction, determines that the dual-center system needs to be switched, and sets the status flag of each application as switching from the normal state to the switching state. Each application learns that the status flag is set to the switching state, and then starts to stop processing data. In a dual-center system, the first application is connected to the second application, and the second application needs to be switched to a third application, wherein the third application is a backup application of the second application. The dual-center switching server determines that the second application needs to be switched, and switches the connection between the first application and the second application to the connection between the first application and the third application. After the second application is switched to the third application, the dual-center switching server resets the status flags of each application from the switching state to the normal state, and then each application in the system can start processing data according to the status flags in the normal state , to resume normal operation. In the embodiment of the present invention, by reading the state change of the status flag bit, it is determined whether each application is working normally. When switching between dual-center systems, it is not necessary to close each related application, but only stop each application from processing data. After the switch is completed, Just continue to work normally, avoid closing each application, save the time wasted by first closing and then starting loading, and because restarting is avoided, there is no need to initialize the connection, which reduces the connection pressure on the database.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is a flow chart of a switching method of a dual-center system in an embodiment of the present invention;

Fig. 2 is the structural representation of double center system in the embodiment of the present invention;

FIG. 3 is a schematic diagram of a switching server of a dual-center system in an embodiment of the present invention;

FIG. 4 is a schematic diagram of an application server of a dual-center system in an embodiment of the present invention.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments . Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In order to increase the stability of the communication system and improve the fault tolerance of the communication system for disaster situations, a set of backup applications is generally established, including front-end WEB applications, background applications such as APP, and database synchronization applications. When a link such as the database fails, the business can be switched to the standby database to ensure the stability of network services. Before the switchover, since the operation of the application system cannot be controlled, all applications in the system must be stopped to avoid failed transactions and at the same time prevent the loss of abnormal transaction data. After the database switch is complete, restart all related applications. The application needs to connect to access the new database, and the application needs to be able to read the new database access configuration so that it can access the new database normally. In the case of many applications, it takes a long time to stop and restart, and the application restart needs to reload the configuration file to connect to the new database, which will also take a long time.

In order to solve the above problems, an embodiment of the present invention provides a switching method for a dual-center system. The flow of the method is shown in FIG. 1 , and the method may include the following steps:

S101. After receiving the switching request instruction, the dual-center switching server sets the status flags of each application in the dual-center system from the normal state to the switching state, so that each application stops processing data according to the status flags.

S102. The dual-center switching server determines the second application to be switched, and switches the connection between the first application connected to the second application and the second application to the first application and the second application A connection between three applications, the third application being a backup application of the second application;

S103. After determining that the switching is completed, the dual-center switching server sets the status flags of each application from the switched state to the normal state.

In the embodiment of the present invention, a dual-center switching server is added between the dual-center switching systems to monitor the entire switching process. The dual-center switching server can realize the interaction with the staff through the client, receive the instructions input by the staff, conduct self-inspection on the switching direction and switching environment, and perform synchronous real-time display on the front desk of the server, so that the staff can accurately grasp the switching time and The status and status of each application after switching, as well as the execution status of each switching step, facilitate the staff to deal with various situations in a timely and appropriate manner.

The dual-center system includes WEB server, APP server and database server connected in sequence, as shown in Figure 2. A WEB application is set on the WEB server, an APP application is set on the APP server, and a database synchronization application is set on the database server.

In the prior art, one application is set up on one server, that is, the main application. When setting up the backup application, another server needs to be set up. For example, for WEB applications, there are two WEB servers. A standby WEB application is set on the server. When switching APP applications or databases, both WEB servers need to be shut down, and then restarted after switching. Similarly, for APP applications or database synchronization applications, two servers need to be set up respectively.

In the embodiment of the present invention, for WEB applications and APP applications, both the main and backup applications are set on one server, that is, one main WEB application and one backup WEB application are set on one WEB server; one main APP is set on one APP server Application, a backup APP application. When switching, you only need to make the application stop processing data. After the switching is completed, the application continues to process data, avoiding shutting down and restarting the server, saving time.

The first application is a WEB application on the WEB server or an APP application on the APP server; the second application is an APP application on the APP server or a database synchronization application on the database server.

From the application side, after the first application determines that the dual-center switching server sets the status flag bit of the first application to the switching state, it stops processing data;

If the application to be switched is a second application connected to the first application, the first application establishes a connection with a third application, and the third application is a backup application of the second application;

The first application starts to process data after determining that the dual-center switching server sets the state flag of the first application to a normal state. The status flag of the first application is set to the normal state after the dual-center switching server determines that the switching is completed.

In the embodiment of the present invention, the status flag is introduced through the dual-center switching server, and the corresponding status flag is assigned to each application in the dual-center system, so that each application can process data according to the state of the corresponding status flag. The dual-center switching server receives the switching request instruction, determines that the dual-center system needs to be switched, and sets the status flag of each application as switching from the normal state to the switching state. Each application learns that the status flag is set to the switching state, and then starts to stop processing data. In a dual-center system, the first application is connected to the second application, and the second application needs to be switched to a third application, wherein the third application is a backup application of the second application. The dual-center switching server determines that the second application needs to be switched, and switches the connection between the first application and the second application to the connection between the first application and the third application. After the second application is switched to the third application, the dual-center switching server resets the status flags of each application from the switching state to the normal state, and then each application in the system can start processing data according to the status flags in the normal state , to resume normal operation. In the embodiment of the present invention, by reading the state change of the status flag bit, it is determined whether each application is working normally. When switching between dual-center systems, it is not necessary to close each related application, but only stop each application from processing data. After the switch is completed, Just continue to work normally, avoid closing each application, save the time wasted by first closing and then starting loading, and because restarting is avoided, there is no need to initialize the connection, which reduces the connection pressure on the database.

The dual-center switching system controls each application through the status flags, providing status flags corresponding to the WEB layer, APP layer and database layer respectively, and each layer caches the status flags in the memory of the dual-center switching server. The dual-center switching server provides a separate process refresh status flag for real-time access by WEB applications, APP applications, and database synchronization applications. Each application in the system reads the status flag bits cached in the memory, and judges whether each application is in a normal working state or in a switching state according to the state of the status flag bits, so as to judge whether each application is normally accepting business. In this way, the workload of the dual-center switching server can be reduced, and the abnormality of the entire system can be avoided when the dual-center switching server is unavailable.

Each layer of applications also caches the corresponding status flags in their respective server memory. Each application periodically reads the status flags in the dual-center switching server and compares them with the state of the status flags stored in its own server. If If the two states are the same, then no processing is done; if the two states are different, the state of the state flag in the memory of the server is changed accordingly, and the state of the corresponding state flag is set to be the same as the state of the dual-center switching server. The state of the status flag bit is consistent.

In this way, each application can directly judge whether it is working normally according to the status flag bits stored by itself. Specifically, after the first application determines that the dual-center switching server sets the state flag of the first application to the switching state, it stops processing data, including:

The first application periodically obtains the status flag bit from the dual-center switching server, and stores it in the memory of the first application;

After the first application receives the data, it reads the status flag bit from the memory of the first application to switch state, and stops processing data.

Wherein, the first application periodically reads the corresponding status flag bits in the dual-center switching server, and stores the status flag bits in the memory. After the first application receives the business data, it reads the state of the status flag from its own memory. If the status flag is in the switched state, it indicates that the dual-center switching system needs to be switched, and the first application stops processing data. After the switching is completed, the dual-center switching server will switch the state of the status flag back to the normal state. The first application periodically reads the corresponding status flag in the dual-center switching server, determines that the state of the status flag stored in the self-memory is inconsistent with the state of the status flag in the dual-center switching server, and then stores the status flag in the self-memory The state of the status flag bit is also switched back to the normal state. After the first application receives the service data, it reads the status flag in the memory of the first application and knows that it is in a normal state, then the first application starts to process the service data.

In order to ensure that the normal processing of the business being processed is completed, the embodiment of the present invention sets the status flag from the normal state to the switching state, starting from the status flag of the WEB application, then switching the status flag of the APP application, and finally switching the database synchronization Application status flags. Specifically, step S101 includes:

The dual-center switching server sets the status flag of the WEB application corresponding to the WEB server from a normal state to a switching state;

After the first predetermined time, the dual-center switching server sets the status flag bit of the APP application corresponding to the APP server from the normal state to the switching state;

After a second predetermined time, the dual-center switching server sets the status flag of the database synchronization application corresponding to the database server from the normal state to the switched state.

It should be noted that the above situation is mainly for the switchover of the primary database server to the standby database server. When the database server is switched, upper-layer applications such as WEB applications and APP applications need to stop processing data.

First, the dual-center switching server sets the status flag bit of the WEB application to the switching state, and after the WEB application reads it, it stops processing the received data. Since the WEB application can directly interact with the front-end users, when the WEB application determines that the status flag is in the switching state, it can display a friendly reminder interface to the front-end access users to explain why the current system cannot be accessed.

The dual-center switching server sets the status flag of the WEB application to the switching state after a first predetermined time, and then sets the status flag of the APP application to the switching state. The APP application determines that the corresponding status flag is in the switching state, and then no longer accesses the back-end database, and feeds back to the front-end application that the current system is switching.

After the second predetermined time, the dual-center switching server sets the status flag bit of the database synchronization application to the switching state. The database synchronization software reads the status flag as the switching state, and starts switching after it is determined that there is no newly added log file to be archived within a period of time.

Preferably, if the application to be switched is the second application connected to the first application, establishing a connection between the first application and the third application includes:

After the second application is switched from the main application state to the standby application state, and the third application is switched from the standby application state to the main application state, the connection point of the first application is switched from pointing to the second application to pointing to the third application so as to establish a connection between the first application and the third application.

For database server switching, specifically, the database synchronization application on the master database server is stopped, and the database synchronization application on the master database server is switched from a master state to a slave state. Then stop the database synchronization application on the standby database server, and switch the database synchronization application on the standby database server from the slave state to the master state.

After the database server is switched, the orientation of the APP needs to be changed accordingly. Before the switchover, the APP application points to the primary database server. After the switchover, the APP application needs to point to the standby database server. In the embodiment of the present invention, the APP application connects to the database synchronization application through LDAP, then step S102 includes: the dual-center switching server switches the second application from the main application state to the standby application state, and the third application After switching from the standby application state to the main application state, the LDAP (Lightweight Directory Access Protocol, Lightweight Directory Access Protocol) connection point of the first application is switched from pointing to the second application to pointing to the third application; wherein , the first application is the APP application, and the second application is a database synchronization application.

After the switching is completed, the dual-center switching server sets the status flags of each application from the switching state to the normal state, and the order of setting starts from the status flags of the database synchronization application, then sets the status flags of the APP application, and finally sets the WEB application status flags. That is, step S103 includes: the dual-center switching server sets the status flag of the database synchronization application from the switched state to the normal state;

After the third predetermined time, the dual-center switching server sets the status flag of the APP application from the switching state to the normal state;

After the fourth predetermined time, the dual-center switching server sets the status flag bit of the WEB application from the switched state to the normal state.

In the embodiment of the present invention, the first application is a WEB application on the WEB server or an APP application on the APP server; the second application is an APP application on the APP server or an APP application on the database server database synchronization application.

The foregoing mainly describes the switching of the database server, wherein the first application is an APP application on the APP server, and the second application is a database synchronization application on the database server. For the dual-center system, the APP application can also be switched. At this time, the first application is a WEB application, and the second application is an APP application. The specific switching method is similar to the switching of the database server. After the application switching is completed, the status flag bit of the APP application is set to the normal state, and then the status flag bit of the WEB application is set to the normal state. The difference is that when the APP application is switched, the database synchronization application does not need to stop processing data, therefore, the status flag of the database synchronization application can always maintain a normal state.

When the APP application is switched, the orientation of the WEB application also needs to be changed. The WEB application is connected to the APP application through the load balancing server. At this time, step S102 includes: the dual-center switching server switches the second application from the main application state to the standby application state, and after the third application switches from the standby application state to the main application state, the load The connection point of the balancing server is switched from pointing to the second application to pointing to the third application. Before the switchover, the WEB connects to the main APP application through the load balancing server. After the switchover, the WEB connects to the standby APP application through the load balancing server.

In order to understand the present invention more clearly, the above process will be described in detail below with specific examples.

In one embodiment of the present invention, the primary database server in the dual-center system originally performs work, but now needs to be switched to the standby database server to perform work. The specific steps of the embodiment include:

In the first step, the dual-center switching server receives the switching request instruction sent by the staff.

In the second step, the dual-center switching server sets the status flag bit of the WEB application from the normal state to the switching state.

In the third step, the WEB application periodically reads the status information of the status flag bit from the dual-center switching server, and stores it in the memory of the WEB server.

Step 4: After the WEB application receives the service data, it reads the status information of the status flag in the memory, determines that it is in the switching state, stops processing the received service data, and informs the user of the reason why the system temporarily stops processing.

In the fifth step, 3 seconds after the completion of the second step, the dual-center switching server sets the status flag of the APP application from the normal state to the switching state.

In the sixth step, the APP application periodically reads the status information of the status flag bit from the dual-center switching server, and stores it in the memory of the APP server.

Step 7: After the APP application receives the business data, it reads the status information of the status flag bit in the memory, determines the switching status, and stops processing the received business data.

In the eighth step, 3 seconds after the completion of the fifth step, the dual-center switching server sets the status flag of the database server from the normal state to the switching state.

Step 9: The database synchronization application periodically reads the status information of the status flag from the dual-center switching server, and stores it in the memory of the database synchronization application.

In the tenth step, the primary database server is switched to the standby database server, and the standby database server is switched to the primary database server.

In the eleventh step, the dual-center switching server changes the database connection point in LDAP from pointing to the primary database to pointing to the standby database.

In the twelfth step, the dual-center switching server sets the status flag of the APP application from the switching state to the normal state.

Step 13: After the APP application reads that the status flag is in a normal state, it normally provides corresponding functions to the outside.

In the fourteenth step, the dual-center switching server sets the status flag bit of the WEB application from the switching state to the normal state.

Step 15: After the WEB application reads that the status flag is in a normal state, it normally provides corresponding functions to the outside.

Based on the same technical concept, the embodiment of the present invention also provides a switching server of a dual-center system, as shown in Figure 3, including:

Setting module 1 is used to set the status flags of each application in the dual-center system from the normal state to the switching state after receiving the switching request instruction, so that each application stops processing data according to the status flags; after determining that the switching is completed , set the status flag bit of each application from the switching state to the normal state;

The connection module 2 is configured to determine the second application to be switched, and switch the connection between the first application and the second application to the connection between the first application and the third application, and the third application is the connection between the first application and the second application. The backup application for the second application.

Optionally, the setting module 1 is specifically used for:

Setting the status flag bit of the WEB application corresponding to the WEB server from a normal state to a switching state;

After the first predetermined time, the status flag bit of the APP application corresponding to the APP server is set from the normal state to the switching state;

After the second predetermined time, the state flag bit of the database synchronization application corresponding to the database server is set to the switching state from the normal state;

Setting the state flag bit of the database synchronization application from the switching state to the normal state;

After the third predetermined time, the state flag bit of the APP application is set to a normal state from the switching state;

After the fourth predetermined time, set the status flag bit of the WEB application from the switched state to the normal state.

Optionally, the first application is an APP application in an APP server, the second application is a database synchronization application, and the first application connects to the second application through LDAP;

Connection module 2, specifically for:

After the second application is switched from the main application state to the standby application state, and the third application is switched from the standby application state to the main application state, the LDAP connection of the first application is pointed to, and the second application Switch to the third application.

Optionally, the first application is a WEB application in the WEB server, the second application is an APP application in the APP server, and the WEB application is connected to the second application through a load balancing server;

Connection module 2, specifically for:

After the second application is switched from the main application state to the standby application state, and the third application is switched from the standby application state to the main application state, the connection of the load balancing server is directed to be switched by the second application for the third application.

An application server of a dual-center system, as shown in Figure 4, includes:

The judging module 3 is used to stop processing data after determining that the dual-center switching server sets the status flag of the first application to the switching state; after determining that the dual-center switching server sets the status flag of the first application After being set to a normal state, start processing data, and the state flag bit of the first application is set to a normal state after the dual-center switching server determines that the switching is completed;

The establishment module 4 is configured to establish a connection with a third application if the application to be switched is a second application connected to the first application, and the third application is a standby application of the second application.

Optionally, the judging module 3 is specifically used for:

Periodically obtain the status flag bit from the dual-center switching server;

After receiving the data, determine whether the acquired state flag is in a switching state;

Stop processing the data when it is determined that the acquired status flag bit is in a switching status.

Optionally, build module 4, specifically for:

After the second application is switched from the main application state to the standby application state, and the third application is switched from the standby application state to the main application state, direct the connection of the first application to be switched by the second application For the third application, establishing a connection between the first application and the third application is realized.

The dual-center system includes a WEB server, an APP server and a database server connected in sequence; the first application is a WEB application on the WEB server or an APP application on the APP server; the second application is the APP server The APP application on the database server or the database synchronization application on the database server; and when the first application is the WEB application, the second application is the APP application; when the first application is the APP application , the second application is the database synchronization application.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

While preferred embodiments of the invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (16)

1. A switching method of a dual center system, characterized in that, comprising: After receiving the switching request instruction, the dual-center switching server sets the status flags of each application in the dual-center system from the normal state to the switching state, so that each application stops processing data according to the status flags; The dual-center switching server determines the second application to be switched, and switches the connection between the first application connected to the second application and the second application to the first application and the third application The connection between the third application is the backup application of the second application; After determining that the switching is completed, the dual-center switching server sets the status flags of each application from the switched state to the normal state. 2. the method for claim 1, is characterized in that, described double center system comprises Internet WEB server, application program APP server and database server connected successively; The dual-center switching server sets the status flags of each application in the dual-center system from a normal state to a switching state, including: The dual-center switching server sets the status flag of the WEB application corresponding to the WEB server from a normal state to a switching state; After the first predetermined time, the dual-center switching server sets the status flag bit of the APP application corresponding to the APP server from the normal state to the switching state; After the second predetermined time, the dual-center switching server sets the status flag bit of the database synchronization application corresponding to the database server from the normal state to the switching state; Said setting the state flag bits of each application from the switching state to the normal state includes: The dual-center switching server sets the status flag of the database synchronization application from the switching state to the normal state; After the third predetermined time, the dual-center switching server sets the status flag of the APP application from the switching state to the normal state; After the fourth predetermined time, the dual-center switching server sets the status flag bit of the WEB application from the switched state to the normal state. 3. The method according to claim 2, wherein the first application is the APP application, the second application is the database synchronization application, and the first application uses the Lightweight Directory Access Protocol (LDAP) connecting the second application; The switching the connection between the first application connected to the second application and the second application to the connection between the first application and the third application includes: The dual-center switching server switches the second application from the main application state to the standby application state, and after switching the third application from the standby application state to the main application state, directs the LDAP connection of the first application to , switching from the second application to the third application. 4. The method according to claim 2, wherein the first application is the WEB application, the second application is the APP application, and the first application connects to the second application through a load balancing server. Two applications; The switching the connection between the first application connected to the second application and the second application to the connection between the first application and the third application includes: The dual-center switching server switches the second application from the main application state to the standby application state, and after switching the third application from the standby application state to the main application state, directs the connection of the load balancing server to Switch from the second application to the third application. 5. A switching method of a dual-center system, comprising: After the first application determines that the dual-center switching server sets the state flag of the first application to the switching state, stop processing data; If the application to be switched is a second application connected to the first application, the first application establishes a connection with a third application, and the third application is a backup application of the second application; The first application starts to process data after determining that the dual-center switching server sets the status flag of the first application to a normal state, and the status flag of the first application is determined by the dual-center switching server It is set to normal state after switching is completed. 6. The method according to claim 5, wherein the first application stops processing data after determining that the dual-center switching server sets the state flag bit of the first application to the switching state, comprising: The first application periodically obtains the status flag bit from the dual-center switching server; After the first application receives the data, determine whether the acquired state flag is in a switching state; Stop processing the data when it is determined that the acquired status flag bit is in a switching status. 7. The method according to claim 5, wherein if the application to be switched is the second application connected to the first application, establishing a connection between the first application and the third application comprises: After the second application is switched from the main application state to the standby application state, and the third application is switched from the standby application state to the main application state, direct the connection of the first application to be switched by the second application for the third application. 8. The method according to any one of claims 5 to 7, wherein the dual center system comprises a WEB server, an APP server and a database server connected in sequence; The first application is a WEB application on the WEB server or an APP application on the APP server; The second application is an APP application on the APP server or a database synchronization application on the database server; And, when the first application is the WEB application, the second application is the APP application; when the first application is the APP application, the second application is the database synchronization application . 9. A switching server of a dual center system, characterized in that it comprises: The setting module is used to set the state flags of each application in the dual-center system from the normal state to the switching state after receiving the switching request instruction, so that each application stops processing data according to the state flags; after determining that the switching is completed, Set the state flag bit of each application from the switching state to the normal state; A connection module, configured to determine the second application to be switched, and switch the connection between the first application connected to the second application and the second application to between the first application and the third application The connection between the third application is the backup application of the second application. 10. The server according to claim 9, wherein the setting module is specifically used for: Setting the status flag bit of the WEB application corresponding to the WEB server from a normal state to a switching state; After the first predetermined time, the status flag bit of the APP application corresponding to the APP server is set from the normal state to the switching state; After the second predetermined time, the state flag bit of the database synchronization application corresponding to the database server is set to the switching state from the normal state; Setting the state flag bit of the database synchronization application from the switching state to the normal state; After the third predetermined time, the state flag bit of the APP application is set to a normal state from the switching state; After the fourth predetermined time, set the status flag bit of the WEB application from the switched state to the normal state. 11. The server according to claim 10, wherein the first application is the APP application, the second application is the database synchronization application, and the first application connects to the second application; The connection module is specifically used for: After the second application is switched from the main application state to the standby application state, and after the third application is switched from the standby application state to the main application state, the LDAP connection of the first application is pointed to by the second application The application is switched to the third application. 12. The server according to claim 10, wherein the first application is the WEB application, the second application is the APP application, and the first application is connected to the second application through a load balancing server. Two applications; The connection module is specifically used for: After the second application is switched from the main application state to the standby application state, and after the third application is switched from the standby application state to the main application state, the connection of the load balancing server is pointed to, and the second application Switch to the third application. 13. An application server of a dual center system, characterized in that it comprises: A judging module, configured to stop processing data after determining that the dual-center switching server sets the status flag of the first application to a switching state; after determining that the dual-center switching server sets the status flag of the first application After being in a normal state, start processing data, and the state flag bit of the first application is set to a normal state after the dual-center switching server determines that the switching is completed; An establishing module, configured to establish a connection with a third application if the application to be switched is a second application connected to the first application, and the third application is a standby application of the second application. 14. The server according to claim 13, wherein the judging module is specifically used for: Periodically obtain the status flag bit from the dual-center switching server; After receiving the data, determine whether the acquired state flag is in a switching state; Stop processing the data when it is determined that the acquired status flag bit is in a switching status. 15. The server according to claim 13, wherein the establishment module is specifically used for: After the second application is switched from the main application state to the standby application state, and the third application is switched from the standby application state to the main application state, direct the connection of the first application to be switched by the second application for the third application. 16. The server according to any one of claims 13 to 15, wherein the dual-center system comprises a WEB server, an APP server and a database server connected in sequence; The first application is a WEB application on the WEB server or an APP application on the APP server; The second application is an APP application on the APP server or a database synchronization application on the database server; And, when the first application is the WEB application, the second application is the APP application; when the first application is the APP application, the second application is the database synchronization application .