WO2009039701A1

WO2009039701A1 - A method and system for realizing large-scale instant communication

Info

Publication number: WO2009039701A1
Application number: PCT/CN2007/070771
Authority: WO
Inventors: Jianxiang Mo
Original assignee: Alibaba Group Holding Limited
Priority date: 2007-09-25
Filing date: 2007-09-25
Publication date: 2009-04-02

Abstract

The method is used for solving the issues that the capability of the large-scale instant communication system is unstable and the access of client side is unreliable. The method of the present invention comprises: getting the access information of each access server in the instant communication system; according to the access information, the domain name server (DNS) in the instant communication system provides the information of the access server which can access the user to the client side; according to the information of the access server, the client side selects an access server to access the instant communication system. A system for realizing large-scale instant message is disclosed synchronously.

Description

Method and system for realizing large-scale instant communication

Technical field

The present invention relates to the field of communications and computer technologies, and more particularly to a method and system for implementing large-scale instant messaging.

Background technique

With the development of instant messaging technology, the number of instant messaging client users is growing. To meet the ever-increasing demands, it is necessary to establish a stable and reliable large-scale instant messaging system. In the existing method, when a large instant messaging system is set up, a load balancing (LoadBalance) device is used, and the connection request of the client is allocated by the LoadBalance device to the access server provided by the background managed by the client. When the client obtains the IP protocol (Internet Protocol) address of the access server through the Domain Name Server (DNS), the LoadBalance device returns an IP address. When the client requests to log in to the instant messaging system through the IP address, the LoadBalance device assigns the client connection request to an access server according to a certain policy, so that the client obtains the instant communication service through the designated access server. .

这种 In this way, the stability and capacity of the system is completely dependent on the LoadBalance device, if

The LoadBalance device fails and all users' instant messaging services are affected.

In the prior art, the manner in which the login server allocates the IP address of the access server may also be used. When the client logs in to the instant messaging system, the client DNS obtains multiple IP addresses of the access server returned by the login server, and attempts to connect to the login until the login is successful. After the login is successful, the client obtains a service from the access server that is successfully logged in.

In this way, the login server manages all access servers. The performance and stability of the login server also become a bottleneck for the stable operation of the system. If the login server fails, all clients cannot log in to the server normally. Using clusters can improve system performance and increase stability. However, the use of clusters increases the operating costs.

Summary of the invention

The present invention provides a method and system for implementing large-scale instant messaging, which is used to solve the problem that the performance of the load balancing device or the login server in the prior art is unstable, and the client access is unreliable.

The invention provides the following technical solutions: A method for implementing large-scale instant messaging includes the following steps:

Obtaining access information of each access server in the instant messaging system;

The domain name server DNS in the instant messaging system provides information of the access server accessible to the user to the client according to the access information;

The client selects an access server to access the instant messaging system according to the information of the access server.

Preferably, each access server is monitored, and when the load of the access server is monitored to exceed a predetermined threshold or there is a fault, the access server is identified as being inaccessible to the user.

Each access server identifies whether the access server can access the user by setting a monitoring port status.

Before returning the information of the access server to the client, the DNS further sorts according to the load of each access server, and provides the information of the sorted access server to the client.

The client preferentially selects an access server with a light load to connect.

Preferably, the DNS further provides information about the access server managed by the load balancing device to the client.

The client preferentially selects an access server other than the access server managed by the load balancing device to connect.

When the DNS receives the access server information that the client DNS request can access the user, after the information is returned to the client DNS, the client DNS provides the information to the client.

An access server, comprising:

An access unit, configured to provide a user access service;

The monitoring unit is configured to monitor the load information of the access unit and whether the system of the access server is faulty, and identify, according to the monitoring result, whether the access server can access the user in the access information.

Preferably, the monitoring unit further identifies load information of the access server in the access information.

An instant messaging system DNS, including:

a receiving unit, configured to acquire access information of the access server;

And a sending unit, configured to provide, according to the access information, information that is accessible to the access server of the user to the client. Among them, it also includes:

And a sorting unit, configured to sort the access servers of the accessible users according to the load information in the access information, and output the sorted access server information of the accessible users to the sending unit.

A communication system comprising:

a first access server, configured to provide an instant communication service for a user accessing the access server, monitor load information of the access server, and whether the system is faulty, and identify the access server in the access information according to the monitoring result. Whether it can access users;

The instant messaging system domain name server (DNS) is connected to the first access server, and is configured to obtain access information of each first access server, and determine, according to the access information, all first access servers that can access the user;

a client DNS, configured to obtain information of all first access servers of the accessible users from the instant messaging system DNS;

The client, connected to the client DNS and the access server, selects the access server to access the instant messaging system from the information of the access server of the accessible user obtained from the client DNS.

Further,

The access server identifies load information of the access server in the access information; and the instant messaging system DNS sends the access server information of the accessible user according to the load information to the client. DNS.

Preferably, the method further includes:

a second access server, configured to provide an instant communication service for a user accessing the access server; a load balancing device, configured to manage the second access server, and allocate the instant messaging service requested by the client to the second access On the server.

The beneficial effects of the present invention are as follows:

After monitoring the load and other information of the access server, the access server of the accessible user is sorted according to the load and returned to the client, and the client preferentially selects the access server with a lighter load to log in, which not only improves the client. The reliability of the end access, and the number of clients logging in to the access server is relatively balanced; when the load balancing device and the second access server managed by the system are added to the system, the first access server cannot provide the service immediately. The client can also log in to the instant messaging system through the access server managed by the load balancing device. The first access server is managed by the instant messaging system DNS, which avoids unstable system performance caused by the load balancing device or the login server failure.

DRAWINGS

1 is a structural diagram of a system in Embodiment 1 of the present invention;

2 is a flowchart of processing of a monitoring unit according to Embodiment 1 of the present invention;

3 is a flowchart of processing of a client login instant messaging system according to Embodiment 1 of the present invention; FIG. 4 is a structural diagram of a system according to Embodiment 2 of the present invention;

FIG. 5 is a flowchart of processing a client login instant messaging system according to Embodiment 2 of the present invention.

detailed description

In order to solve the problem that the performance of the large instant messaging system formed by the prior art is unstable and the access is unreliable, the present invention monitors the load information of the access server, and provides information of the access server accessible to the user. The client, the client selects the lighter access server to access the instant messaging system.

Embodiment 1:

Referring to FIG. 1, the communication system of this embodiment includes a first access server 110, an instant messaging system DNS 120, a client DNS 130, and a client 140.

The first access server 110 includes an access unit 1101 and a monitoring unit 1102. Access unit

1101 is used to provide client 140 access service. The monitoring unit 1102 monitors the load information of the access unit 1101 and whether the access server is faulty. When the access server system works normally and the load does not exceed a predetermined threshold, the monitoring unit 1102 controls the status identifier of the monitoring port. Whether the access server can access the user; and identifying the load information of the access server when the access server can access the user.

The first access server 110 herein includes at least two access servers that can provide services for access users, and the similar contents are the same below.

The instant messaging system DNS120 includes a receiving unit 1201, a sorting unit 1202, and a sending unit.

1203. The receiving unit 1201 is configured to acquire the access information of the first access server 110, and obtain the load information of the first access server 110 that can access the user when the first access server 110 can access the user. The sorting unit 1202 is configured to sequentially transmit the first access server 110 information of the accessible user to the sending unit 1203 according to the load information. The sending unit 1203 will receive the received The sorted information of the first access server 110 of the accessible user is returned to the client DNS 130. The client DNS 130 is configured to periodically obtain information of the first access server 110 that can access the user from the instant messaging system DNS 120; perform service analysis on the service requested by the client, and first access the user according to the parsing result. The information of the access server 110 is returned to the client 140.

The client 140 is configured to apply for an instant messaging service, and select the first access server 110 of the accessible user to access the instant messaging system.

When the time length for acquiring the access information of the first access server 110 is set in the receiving unit 1201 of the instant messaging system DNS 120, the receiving unit 1201 automatically scans the monitoring port status of the access server according to the set length of time. In the implementation process, the setting may be set according to a specific situation, such as setting to 1 minute, which may speed up the update of the IP address list of the first access server 110 that can access the user and the number of users who log in to the first access server 110. On average, each access server is more balanced.

Referring to Figure 2, the processing of the monitoring unit of the access server is as follows:

Step 201: Monitor the load information of the access server, and take data such as the number of clients currently accessing the access server, the traffic value, and the CPU usage.

Step 202: Compare the obtained data with a threshold value of each data set by the system. If any one of the data exceeds a corresponding threshold, and determine that the access server is a non-accessible user, perform step 205; If no data exceeds the corresponding threshold, step 203 is performed.

Step 203: Determine whether the access service program works normally. If an exception occurs, perform step 205; if the operation is normal, perform step 204.

Step 204: Identify that the access server can access the user, and set the monitoring port of the access server to an open state.

Step 205: Identify that the access server is inaccessible to the user, and set the monitoring port of the access server to the closed state.

Referring to Figure 3, the process of the client logging in to the instant messaging system is as follows:

Step 301: The instant messaging system DNS detects the monitoring port of the access server according to the set timing. If the monitoring port of the access server is detected to be in an open state, the IP address and load information of the access server are recorded; After the access server is sorted according to the recorded load information, a list of IP addresses of access servers accessible to the user is generated. Step 302: The client DNS sends a request for requesting access to the IP address list message of the access server of the user to the instant messaging system DNS.

Step 303: The instant messaging system DNS returns the IP address list of the access server of the accessible user to the client DNS.

Step 304: When the client prepares to log in to the instant messaging system, the client sends a login request for domain name address resolution to the client DNS.

Step 305: After performing the service parsing on the received login request, the client DNS returns the IP address list of the access server of the access user to the client requesting the login.

Step 306: After receiving the IP address list of the access server, the client selects a lighter access server in the list to log in.

Step 307: If the load of the access server exceeds the threshold or the access service program is faulty, the monitoring port of the access server is closed.

Step 308: According to the set timing length, when the instant messaging system DNS detects the monitoring port of the access server, if the monitoring port of the access server is detected to be closed, the access server cannot access the user; After the monitoring port of the incoming server is detected, update the list of available IP addresses of the access server.

Step 309: After a timing period, the client DNS requests the instant messaging system DNS to return a list of IP addresses of the available access servers.

Step 310: The instant messaging system DNS returns the updated IP address list of the available access servers to the client DNS.

Using the above method, the instant messaging system DNS periodically detects whether the access server can access the user, improves the availability of the IP address list of the access server to which the client DNS requests, and ensures reliable access when the client logs in. At the same time, because the instant messaging system DNS is a highly available system, it avoids the impact on the stability of the system when the DNS of one instant communication system fails.

Embodiment 2:

Referring to FIG. 4, the communication system of this embodiment adds a load balancing device 150 and a second access server 160 to FIG. The second access server 160 is configured to provide an instant communication service for the client 140 accessing the access server. The load balancing device 150 is configured to manage the second access server 160 and apply the instant messaging service requested by the client 140. Assigned to the second access server 160. When the system is used, the information of the load balancing device 150 is pre-configured in the information of the access server of the accessible user that the instant messaging system DNS 120 returns to the client DNS 130. When the client 140 cannot log in to the first access server 110. In the above, the client 140 logs in according to the information of the load balancing device configured in the access server information of the accessible user, and the load balancing device 150 allocates the connection request of the client 140 to the second access server 160 managed by the client 140. .

Referring to Figure 5, the process of the client logging in to the instant messaging system is as follows:

Step 501: The client sends a login request for domain name address resolution to the client DNS.

Step 502: After performing the domain name resolution on the login request sent by the client, the client DNS returns the IP address list of the first access server that can access the user and the IP address of the load balancing device to the client.

Step 503: The client selects a lighter access server in the list according to the received IP address list of the first access server to log in.

Step 504: When the load of the first access server exceeds a threshold or the access service program is faulty, the monitoring port of the access server is closed.

When the first access server needs to be maintained, the monitoring port can be directly set to the closed state, so that the new user can be no longer accessed, and the instant communication service of the user accessing the access server is completed. The access server stops working smoothly.

Step 505: The instant messaging system DNS timing detects the monitoring port of the first access server, and detects that all the monitoring ports of the first access server are in the closed state, and all the first access servers are inaccessible to the user.

Step 506: When the instant messaging system DNS receives the client DNS request and returns the access server information of the accessible user, only the IP address of the pre-configured load balancing device is returned to the client DNS.

Step 507: When all the first access servers are inaccessible to the user, the client logs in to the second access server managed by the load balancing device.

In the method of the second embodiment, when the client fails to log in using the IP address of the first access server returned by the DNS, the client automatically selects the IP address of the load balancing device to attempt to log in.

In the second embodiment, when the first access server is inaccessible to the user, the client logs in to the balance. The device is managed by the second access server, thereby ensuring that the client logs in to the instant messaging system normally, thereby improving the performance of the system and the reliability of the access system. The spirit and scope of the Ming. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Rights request

A method for implementing large-scale instant messaging, comprising the steps of: obtaining access information of each access server in an instant messaging system;

The method according to claim 1, wherein each access server is monitored, and when the load of the access server is monitored to exceed a predetermined threshold or there is a fault, the access server is identified as being inaccessible to the user.

3. The method according to claim 2, wherein each access server identifies whether the access server can access the user by setting a monitoring port status.

The method according to claim 1, wherein the DNS returns the information of the access server according to the load of each access server before returning the information of the access server to the client, and the information of the sorted access server is obtained. Provided to the client.

The method according to claim 4, wherein the client preferentially selects an access server with a light load to connect.

The method according to any one of claims 1 to 5, wherein the DNS further provides information of an access server managed by the load balancing device to the client.

7. The method according to claim 6, wherein the client preferentially selects an access server other than the access server managed by the load balancing device to connect.

8. The method according to claim 7, wherein, when the DNS receives the access server information that the client DNS request can access the user, and returns the information to the client DNS, the client DNS will The information is provided to the client.

9. An access server, comprising:

An access unit, configured to provide a user access service;

10. The access server of claim 9, wherein the monitoring unit further The load information of the access server is identified in the access information.

11. An instant messaging system DNS, characterized by comprising:

And a sending unit, configured to provide, according to the access information, information of an access server accessible to the user to the client.

12. The DNS of claim 11, further comprising:

13. A communication system, comprising:

14. The system of claim 13 wherein:

The access server further identifies load information of the access server in the access information;

The instant messaging system DNS sends the access server information of the accessible users according to the load information to the client DNS.

The system of claim 13 or 14, further comprising: