CN101217483A - A method to realize cluster server inner load sharing agent - Google Patents
A method to realize cluster server inner load sharing agent Download PDFInfo
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- CN101217483A CN101217483A CNA200810004223XA CN200810004223A CN101217483A CN 101217483 A CN101217483 A CN 101217483A CN A200810004223X A CNA200810004223X A CN A200810004223XA CN 200810004223 A CN200810004223 A CN 200810004223A CN 101217483 A CN101217483 A CN 101217483A
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Abstract
The invention discloses a method for realizing the loading sharing agent in a cluster server, comprising the following steps: a client sends a node server selecting request to a agent server; the agent server returns a list of selectable node servers to the client according to the loading situation of the cluster server; according to the list of selectable node servers, the client determines the selected node server and establishes connection directly with the selected node server by negotiating the loading sharing algorithm with the agent server until the conversation between the client and the node server is ended. As adopting the loading sharing agent method that the client is provided with the optimal server node and the suboptimal server node, the invention strengthens the external stability of the cluster server. Furthermore, the agent server does not retransmit the application data between the client and the server; therefore, the agent server is not easy to cause the network bottleneck.
Description
Technical field
The present invention relates to computer application and communication field, more specifically, relate to the method that is used to realize cluster server inner load sharing agent.
Background technology
The quick growth of Internet makes the various network services device, communication server, and the number of visitors of facing increases fast, and server becomes and sinks beneath one's burden, if can't in time handle a large amount of user's service requests, the situation of interruption will appear in server so.Be to adopt the server of stronger computing capability to replace original server in the method that addresses these problems in the past, even like this, the load capacity of separate unit server also is limited, impossible infinite expanding, simultaneously, the price of high-grade server is that the performance along with server presents exponential type and rises, therefore, the system model that adopts many low-cost servers to form load balancing day by day becomes main flow, thereby has expanded the load balancing technology.The load balancing system mainly is that the user's service request that will concentrate on the station server is distributed on the multiple servers.At the initial stage that the load balancing mode occurs, the mode that has many Network Design to adopt the domain name wheel to change, it promptly is the corresponding multiple servers of a domain name, scheme as a kind of cheapness, the mode that the domain name wheel changes can solve the loading problem of some servers, but, because the mode of this load balancing has significant limitation: can't user's service request be sent on the different servers according to the loading condition of each station server; A station server goes wrong when can't work therein, and system still can send to user access request on the server that breaks down, and causes the interruption of part of service; Generally on the server of various places, all can there be Cache to exist because domain name is explained, therefore can causes the user access request in an area will concentrate on the same station server.Thereby in fact, the mode that adopts the domain name wheel to change is done system load and is shared, and its effect is also not obvious.
Therefore, use object at difference, the load balancing technology probably is divided into four kinds of pattern: DNS, acting server, address conversion gateway and agreement internal support, acting server was used the most extensively during advanced server was used, therefore the prior art background of selective analysis acting server here.
Use acting server, request can be transmitted to inner server, use this aero mode obviously can promote access speed, acting server will ask evenly to be transmitted to multiple servers, thereby reach the purpose of load balancing.This agent way and common agent way are different, and the standard agent way is that the client uses a plurality of external servers of proxy access, and this agent way is a plurality of client access internal servers of agency, therefore are also referred to as the reverse proxy pattern.Though it is not complicated especially realizing this task, yet owing to require extra high efficient, it is also remarkable to implement.Use the benefit of reverse proxy to be, the cache technology of load balancing and acting server can be combined, useful performance is provided.Though this acting server itself can reach very high efficiency, at acting on behalf of each time, acting server just must be safeguarded two connections, an external connection, an internal connection, so extra high connection request, the load of acting server are also just very big.The load balancing strategy of energy optimizing application under the reverse proxy mode, the most idle internal server of each visit provides service.But along with the increase of concurrent connection number amount, it is very big that the load of acting server itself also becomes, and last Reverse Proxy itself can become the bottleneck of service.
And more advanced acting server has added many algorithms now, as the flow load sharing method.This acting server can precompute every link channel and send the required time of packet before each transmission packet be to server; Select the shortest passage of transmitting time then, send current data packet with this passage.This flow load sharing method is according to the busy extent Dynamic Selection link of passage, can be applicable to and the data communications equipment different levels, the flow load sharing of different application, but this flow load sharing also has weak point, as: client can not be all identical at every turn to the request msg of server, all different at every turn through the server that acting server finds, the basic like this consistency that does not just guarantee client and server session, and, because the each request server of client, acting server all will carry out flow rate calculation for it, so promptly wasted a lot of time, waste a large amount of acting server resources again, thereby caused the load of acting server bigger.
Summary of the invention
Consider the problems referred to above and make the present invention that for this reason, main purpose of the present invention is, a kind of method that is used to realize cluster server inner load sharing agent is provided.
According to the method that is used to realize cluster server inner load sharing agent of the present invention, may further comprise the steps: client is selected request to acting server sending node server; Acting server returns the tabulation of optional node server according to the loading condition of cluster server to client; And client is by carrying out the load balancing negotiating algorithm with acting server, tabulation according to optional node server, determine the node server of selection, and directly connect conversation end up between client and node server with the node server of selecting.
In addition, in the method, optionally the node server in the tabulation of node server is divided into and the corresponding optimum node server of client and one or more suboptimum node server.
In addition, in the method, acting server calculates according to the request and the flow of client, to analyze the loading condition of each node server, finds optimum node server.
In addition, in the method, client at first is connected with optimum node server, if with occur being connected of optimum node server unusually, then in client and the one or more suboptimum node servers is connected.
In addition, in the method, client independently selects in one or more suboptimum node servers to connect.And the while client is according to the load balancing algorithm of the situation decision acting server use of client.
By the present invention, owing to taked optimal service device node and suboptimum server node all to offer the load sharing agent method of client, strengthened cluster server to external stability, and acting server is not transmitted the application data between client and server, and acting server is not easy to occur network bottleneck.Client by and acting server between carry out load balancing negotiating algorithm mechanism, fully improved the flexibility of selecting; Between all same server node of exchanges data of a session, guaranteed the consistency of same session data between client and server between last client and server.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 shows the flow chart of method that is used to realize cluster server inner load sharing agent according to the embodiment of the invention;
Fig. 2 shows the graph of a relation between client according to the embodiment of the invention, acting server, the cluster server;
Fig. 3 shows the normal flow figure according to the load sharing agent of the embodiment of the invention; And
Fig. 4 shows the unusual flow chart according to the load sharing agent of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
The present invention is in order to solve under the situation of using acting server, to improve the reliability between client, acting server, the cluster server, negotiation property, flexibility and session consistency.
In the cluster service environment, each node server all possesses identical functions, and client is connected with node server in the cluster environment by acting server.Acting server calculates according to the request and the flow of client, analyze the loading condition of each node server, find appropriate nodes server the most, at this moment, node server, acting server, client are held consultation, as long as client does not initiatively disconnect and being connected of node server, this client just can not passed through acting server, and direct and this node server carries out communication.
Fig. 1 shows the flow chart of method that is used to realize cluster server inner load sharing agent according to the embodiment of the invention.
As shown in Figure 1, may further comprise the steps: step S102, client is selected request to acting server sending node server; Step S104, acting server return the tabulation of optional node server according to the loading condition of cluster server to client; And step S106, client according to the tabulation of optional node server, is determined the node server of selecting by carrying out the load balancing negotiating algorithm with acting server, and directly connect conversation end up between client and node server with the node server of selecting.
In addition, in the method, optionally the node server in the tabulation of node server is divided into and the corresponding optimum node server of client and one or more suboptimum node server.
In addition, in the method, acting server calculates according to the request and the flow of client, to analyze the loading condition of each node server, finds optimum node server.
In addition, in the method, client at first is connected with optimum node server, if with occur being connected of optimum node server unusually, then in client and the one or more suboptimum node servers is connected.
In addition, in the method, client independently selects in one or more suboptimum node servers to connect.And the while client is according to the load balancing algorithm of the situation decision acting server use of client.
Fig. 2 shows the graph of a relation between client according to the embodiment of the invention, acting server, the cluster server.
As shown in Figure 2, client is obtained the server node that service is provided by acting server, and with node server between directly be connected.
Fig. 3 shows the normal flow figure according to the load sharing agent of the embodiment of the invention.And Fig. 4 shows the unusual flow chart according to the load sharing agent of the embodiment of the invention.
Be described in detail in conjunction with Fig. 3 and Fig. 4, client is initiated connection request, and acting server is analyzed the loading condition of cluster internal node server, the server node that the notice client can connect, client to connect permission, connects with node server and communicates.If server node is unavailable, or server node occurs unusually midway, and whole workflow is again since the 3rd step.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a method that is used to realize cluster server inner load sharing agent is characterized in that, may further comprise the steps:
Client is selected request to acting server sending node server;
Described acting server returns the tabulation of optional node server according to the loading condition of described cluster server to described client; And
Described client is by carrying out the load balancing negotiating algorithm with described acting server, tabulation according to described optional node server, determine the node server of selection, and directly connect conversation end up between described client and described node server with the node server of described selection.
2. method according to claim 1 is characterized in that, the node server in the tabulation of described optional node server is divided into and the corresponding optimum node server of described client and one or more suboptimum node server.
3. method according to claim 2 is characterized in that, described acting server calculates according to the described request and the flow of described client, to analyze the loading condition of each described node server, finds described optimum node server.
4. method according to claim 2, it is characterized in that, described client at first is connected with described optimum node server, if with occur being connected of described optimum node server unusually, one in then described client and the described one or more suboptimum node servers is connected.
5. method according to claim 4 is characterized in that, described client is autonomous selects one in described one or more suboptimum node servers to connect.
6. method according to claim 1 is characterized in that, described client determines the described load balancing algorithm that described acting server uses according to the situation of described client.
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| CNA200810004223XA CN101217483A (en) | 2008-01-21 | 2008-01-21 | A method to realize cluster server inner load sharing agent |
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| CN101815033A (en) * | 2010-03-12 | 2010-08-25 | 成都市华为赛门铁克科技有限公司 | Method, device and system for load balancing |
| WO2011032394A1 (en) * | 2009-09-21 | 2011-03-24 | 中兴通讯股份有限公司 | Multimedia conference capacity expansion system, implementation method and web server thereof |
| CN102143046A (en) * | 2010-08-25 | 2011-08-03 | 华为技术有限公司 | Load balancing method, equipment and system |
| CN102447719A (en) * | 2010-10-12 | 2012-05-09 | 上海遥薇(集团)有限公司 | Dynamic load balancing information processing system for Web GIS service |
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| CN104518985A (en) * | 2013-09-27 | 2015-04-15 | 国家广播电影电视总局广播科学研究院 | Method and terminal for selecting service node in distributed network environment |
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