CN101534244A - Method, device and system for load distribution - Google Patents
Method, device and system for load distribution Download PDFInfo
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- CN101534244A CN101534244A CN200910008645A CN200910008645A CN101534244A CN 101534244 A CN101534244 A CN 101534244A CN 200910008645 A CN200910008645 A CN 200910008645A CN 200910008645 A CN200910008645 A CN 200910008645A CN 101534244 A CN101534244 A CN 101534244A
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Abstract
The embodiment of the invention discloses a method, a device and a system for load distribution. The method for lateral load distribution of a load equalizer comprises the steps of: acquiring current remaining load capacities of various affiliated application servers; determining the message distribution weight of each application server according to the remaining load capacities of the affiliated application servers; and receiving a first message of initial session protocol messages which come from a client, referring the message distribution weights of the application servers, selecting one of the application servers, and sending the first message of the initial session protocol messages to the application server for processing. Through the embodiment of the invention, system resources can be effectively configured.
Description
Technical field
The embodiment of the invention relates to communication technical field, relates in particular to a kind of load distribution methods, devices and systems.
Background technology
In next generation network, adopted Softswitch technology, realized calling out control and separating that business provides.Introduced application server in the soft switchcall server, for third-party business provides exploitation and operation platform.In order to improve the big capacity requirement that satisfies operation system, need a plurality of application servers to form group system.A group system is made up of a load equalizer (LB) and a plurality of application server (AS), load equalizer is responsible for session initiation protocol (Session Initiation Protocol that soft switch is sent, SIP) to each application server, application server receives that sip message finishes Business Processing to message with certain load distribution strategy distribution.
A kind of existing load distribution scheme is such: load equalizer will be distributed to a plurality of application servers that have under its command fifty-fifty from the sip message of client and carry out Business Processing.
State in realization in the process of load distribution, the inventor finds that there are the following problems at least in the prior art:
Load is distributed on each application server fifty-fifty, does not consider the load capacity and the actual loading situation of each server, and the server that may cause having is in high load condition for a long time, and the server that has is idle for a long time, has wasted system resource.
Summary of the invention
Embodiments of the invention provide a kind of load distribution methods, devices and systems, effectively allocating system resource.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of method of load equalizer lateral load distribution comprises:
Obtain at least two residual negative loading capability information that application server is current;
Determine the message distribute weightings of described at least two application servers at least according to the residual negative loading capability information of described two application servers;
Reception is from the first message of client-side session initiation protocol message, message distribute weightings according to described at least two application servers is selected one of them application server, the message first of described conversation initiating protocol message is sent to the application server processes of described selection.
A kind of load equalizer comprises:
Residual negative loading capability acquisition module is used to obtain at least two residual negative loading capabilities that application server is current;
Message distribute weightings determination module is used for determining according to the residual negative loading capability information of described at least two application servers the message distribute weightings of described at least two application servers;
Message transmission module first, be used to receive first message from the client-side session initiation protocol message, message distribute weightings according to described at least two application servers is selected one of them application server, and the message first of described conversation initiating protocol message is sent to this application server processes.
A kind of application server comprises:
Sending module is used for sending the current residual negative loading capability information of present application server to load equalizer, and described residual negative loading capability information is used to the load capacity of representing that the current application server can also be born;
Receiver module is used for the conversation initiating protocol message that the balancing received load device is transmitted;
Processing module is used for described conversation initiating protocol message is handled.
A kind of system of load distribution comprises: load equalizer and at least two application servers, wherein,
Load equalizer is used to obtain at least two residual negative loading capability information that application server is current; Determine the message distribute weightings of described at least two application servers at least according to the residual negative loading capability information of described two application servers; Reception is from the first message of client-side session initiation protocol message, message distribute weightings according to described at least two application servers is selected one of them application server, the message first of described conversation initiating protocol message is sent to the application server processes of described selection;
Application server is used for sending the current residual negative loading capability information of present application server to load equalizer, and the conversation initiating protocol message from load equalizer is handled.
The load distribution methods, devices and systems that the embodiment of the invention provides, the residual negative loading capability assign sessions initiation protocol message current, the load of each application server of balance to greatest extent, effectively allocating system resource according to each application server.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of an embodiment of the method for load equalizer lateral load distribution of the present invention;
Fig. 2 is the flow chart of an embodiment of the method for application server lateral load distribution of the present invention;
Fig. 3 is the flow chart of an embodiment of the complete method of load distribution of the present invention;
Fig. 4 is the structural representation of an embodiment of load equalizer of the present invention;
Fig. 5 is the structural representation of another embodiment of load equalizer of the present invention;
Fig. 6 is the structural representation of the embodiment of application server of the present invention;
Fig. 7 is the structural representation of an embodiment of the system of load distribution of the present invention;
Fig. 8 is the structural representation of another embodiment of the system of load distribution of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Below in conjunction with accompanying drawing embodiment of the invention load distribution methods, devices and systems are described in detail.
An embodiment of the method for load equalizer lateral load distribution of the present invention as shown in Figure 1, comprising:
S101, obtain and have the current residual negative loading capability of each application server under its command;
S102, determine the message distribute weightings of each application server at least according to the residual negative loading capability information that has each application server (two) under its command;
Described residual negative loading capability is represented the load capacity that the current application server can also be born.
S103, receive first message from the client-side session initiation protocol message, message distribute weightings with reference to each application server is selected one of them application server, the message first of described conversation initiating protocol message is sent to the application server processes of described selection.
The method embodiment residual negative loading capability assign sessions initiation protocol message current of above load equalizer lateral load distribution of the present invention according to each application server, the load of each application server of balance to greatest extent, cooperate with application server, effectively allocating system resource.
An embodiment of the method for application server lateral load distribution of the present invention as shown in Figure 2, comprising:
S201, initiate registration to load equalizer;
S202, report the current residual negative loading capability of present application server to load equalizer;
The conversation initiating protocol message that S203, balancing received load device are transmitted;
S204, described conversation initiating protocol message is handled.
The method embodiment residual negative loading capability assign sessions initiation protocol message current of above application server lateral load distribution of the present invention according to each application server, the load of each application server of balance to greatest extent, cooperate with application server, effectively allocating system resource.
An embodiment of the complete method of load distribution of the present invention as shown in Figure 3, comprising:
S301, starting load equalizer;
System initialisation phase, load equalizer at first starts, and monitors the register requirement of application server.
S302, startup application server are initiated registration to load equalizer;
S303, each application server that is set to have under its command to the application server of oneself registering of load equalizer distribute the distribution sign for each has application server under its command;
Load equalizer inside is provided with a node listing, and the node listing that cum rights is heavy.Described node listing is used for writing down the distribution sign of each application server.Described distribution sign is in order to the unique identification application server.The node listing that described cum rights is heavy is used for writing down according to the residual negative loading capability of each application server the message distribute weightings of each application server, and the computational methods of message distribute weightings will be introduced in step S306.Described residual negative loading capability is represented the load capacity that the current application server can also be born.
Application server is registered to load equalizer after starting.When an application server succeeds in registration to load equalizer, load equalizer is that application server distributes the distribution sign, and this application server address and distribution sign are added the server node tabulation.
Distribution identifies the generation that can in all sorts of ways, and four hytes of IP addresses of nodes can be converted to binary form respectively, is connected in series successively then, and its result is connected in series with port and hour of log-on again, and the character string of generation is as the distribution sign.
S304, load equalizer receive the heartbeat message from each application server;
S305, load equalizer are resolved from described heartbeat message and are extrapolated application server residual negative loading capability;
Application server has comprised the present load situation of this application server in the heartbeat message that load equalizer sends.Loading condition can be by CPU/ memory size, CPU/ memory usage, currently draw in the analyses of handling such as session number.Typical a kind of implementation is, the residual negative loading capability of application server is reported, the residual negative loading capability of application server obtains by following mode: each application server has a predefined total session disposal ability, deduct the current session ability of handling, promptly obtain the residual negative loading capability.Give an example: the pre-defined total session disposal ability of certain application server is 1000 sessions, and the current session of handling has 500, and the residual negative loading capability of this application server is 500 so.
S306, load equalizer are determined the message distribute weightings of each application server according to the residual negative loading capability that has each application server under its command;
Load equalizer is received the heartbeat message of server, upgrades the message distribute weightings to each server node.So-called weight, total exactly account for the ratio of message number to the message number of each application server distribution, the present embodiment directly accounts for the ratio of total surplus ability as weight with the surplus capacity of each application server, the surplus capacity that reports such as application server 1, application server 2, application server 3 is respectively 200,300,500 sessions, then application server 1 weight is 200/ (200+300+500)=20%, application server 2 weights are 30%, and application server 3 weights are 50%.
The node listing that described cum rights is heavy can be as shown in table 1 in way of realization;
| Sequence number | The application server title |
| 1 | Application server 1 |
| 2 | Application server 1 |
| 3 | Application server 2 |
| 4 | Application server 2 |
| 5 | Application server 2 |
| 6 | Application server 3 |
| 7 | Application server 3 |
| 8 | Application server 3 |
| 9 | Application server 3 |
| 10 | Application server 3 |
Table 1
Application server 1 weight is 20%, and application server 2 weights are 30%, and application server 3 weights are 50%.The node listing that described cum rights weighs is according to the weight of each application server, in 10 positions of this tabulation, 2 positions are set for application server 1,3 positions are set for application server 2,5 positions are set for application server 3, take turns application server this application server present load situation of reflection in time according to each, the node listing that described cum rights is heavy can upgrade according to the weight of each new application server of adjusting.Table 1 has just provided a kind of position ordering relation, conforms to its weight as long as guarantee the number of times that each server occurs in the heavy node listing of cum rights, and ordering is not had inevitable requirement.
S307, load equalizer receive from the client-side session initiation protocol message, attempt extracting from described conversation initiating protocol message the distribution sign;
If the S308 load equalizer does not extract the distribution sign, load equalizer is selected one of them application server with reference to the message distribute weightings of each application server, described conversation initiating protocol message is sent to this application server processes, and in the header field of described conversation initiating protocol message, insert the distribution sign of this application server;
If the S309 load equalizer extracts the distribution sign, described conversation initiating protocol message is sent to distribution sign corresponding application server;
In order to make the message of same session be distributed on the same server node, the present invention adopts the method for step S307-S309.
When load equalizer is received a conversation initiating protocol message, distribution sign (DID) is extracted in trial from the header field of this message, if extract the distribution sign, be identified at inquire address table in the server node tabulation by distribution, the be applied address of server is distributed to this application server with message.If not distribution sign in the message, illustrate that this is first message of this session, load equalizer selects an application server to transmit according to aforesaid weight allocation method, simultaneously, in the header field of the conversation initiating protocol message that is transmitted to application server, insert the distribution sign of server.Here utilized a characteristic of session initiation protocol communication: conversation beginning protocol terminal will carry this field for the field that need not handle in the header field of the conversation initiating protocol message of receiving in the follow-up return messages always.In the present embodiment, after the distribution sign is inserted into the header field of conversation initiating protocol message, all will be with the distribution identification field in the conversation initiating protocol message of follow-up transmission.
S310, do not receive heartbeat message within a certain period of time when load equalizer from application server, no longer with this application server as having application server under its command.
Can make load equalizer no longer to breaking down or out-of-work application server forwarding message like this, guarantee the power that is processed into of conversation initiating protocol message.In addition, useless application server is removed the resource that also can save load equalizer from tabulation.
Embodiment of the invention method can be adjusted each sequence of steps according to actual needs.The residual negative loading capability assign sessions initiation protocol message that present embodiment is current according to each application server when certain application server residual negative loading capability low (just load is higher), reduces the message distribute weightings of this application server; When certain application server residual negative loading capability height (just load is lower), increase the message distribute weightings of this application server, the load of each application server of balance so to greatest extent, effectively allocating system resource.
In addition, load equalizer adds the distribution sign in order to each application server of unique identification in first message of each session, and the subsequent message that identifies same session according to described distribution sends to same application server processes.
Have, when realizing the present invention program, the present embodiment load equalizer only need be set up the heavy node listing of node listing and cum rights, because the internal memory that tabulation itself takies is less, can further save system resource again.
An embodiment of load equalizer of the present invention as shown in Figure 4, comprising:
Residual negative loading capability acquisition module 401 is used to obtain and has the current residual negative loading capability of each application server under its command;
Message distribute weightings determination module 402 is used for determining according to the residual negative loading capability information that has each application server under its command the message distribute weightings of described at least two application servers;
Message transmission module 403 first, be used to receive first message from the client-side session initiation protocol message, message distribute weightings according to described at least two application servers is selected one of them application server, and the message first of described conversation initiating protocol message is sent to this application server processes.
Another embodiment of load equalizer of the present invention as shown in Figure 5, comprising:
Residual negative loading capability acquisition module 501 is used to obtain and has the current residual negative loading capability of each application server under its command;
Message distribute weightings determination module 502 is used for determining according to the residual negative loading capability that has each application server under its command the message distribute weightings of each application server;
Message transmission module 503 first, be used to receive first message from the client-side session initiation protocol message, message distribute weightings with reference to each application server is selected one of them application server, and the message first of described conversation initiating protocol message is sent to this application server processes;
Distribution sign distribution module 504 is used to each application server to distribute the distribution sign;
Distribution sign sending module 505, be used for the distribution sign of the application server of described reception conversation initiating protocol message is sent to the client of described transmission conversation initiating protocol message, in the subsequent message of the conversation initiating protocol message that sends, carry this distribution and identify so that receive the client of described distribution sign;
Subsequent message sending module 506 is used to receive the subsequent message from the client-side session initiation protocol message, extracts the application server distribution sign of carrying in the described subsequent message, and this subsequent message is sent to distribution sign corresponding application server;
Removing module 507 is used for not receiving heartbeat message from application server within a certain period of time when load equalizer, no longer with this application server as having application server under its command.
The embodiment of application server of the present invention as shown in Figure 6, comprising:
Sending module 602 is used for reporting the current residual negative loading capability of present application server to load equalizer;
Receiver module 603 is used for the conversation initiating protocol message that the balancing received load device is transmitted;
Processing module 604 is used for described conversation initiating protocol message is handled.
Further, can also comprise: Registering modules 601 is used for initiating registration to load equalizer.
The residual negative loading capability assign sessions initiation protocol message that above apparatus of the present invention embodiment is current according to each application server, the load of each application server of balance to greatest extent, effectively allocating system resource.
An embodiment of the system of load distribution of the present invention as shown in Figure 7, comprising: load equalizer 701 and at least two application server 702A and 702B, wherein,
Load equalizer 701 is used for the residual negative loading capability assign sessions initiation protocol message current according to each application server;
Application server 702A and 702B are used for reporting the current residual negative loading capability of present application server to load equalizer, and the conversation initiating protocol message that load equalizer is transmitted is handled.
Another embodiment of the system of load distribution of the present invention as shown in Figure 8, comprising: load equalizer 801 and at least two application server 802A and 802B, wherein,
Load equalizer 801 is used to obtain at least two residual negative loading capability information that application server is current; Determine the message distribute weightings of described at least two application servers at least according to the residual negative loading capability information of described two application servers; Reception is from the first message of client-side session initiation protocol message, message distribute weightings according to described at least two application servers is selected one of them application server, the message first of described conversation initiating protocol message is sent to the application server processes of described selection;
Application server 802A and 802B are used for reporting the current residual negative loading capability of present application server to load equalizer, and the conversation initiating protocol message that load equalizer is transmitted is handled.
Wherein, load equalizer 801 comprises:
Residual negative loading capability acquisition module 8011 is used to obtain at least two residual negative loading capabilities that application server is current;
Message distribute weightings determination module 8012 is used for determining according to the residual negative loading capability information of described at least two application servers the message distribute weightings of described at least two application servers;
Message transmission module 8013 first, be used to receive first message from the client-side session initiation protocol message, message distribute weightings according to described at least two application servers is selected one of them application server, and the message first of described conversation initiating protocol message is sent to this application server processes.
The residual negative loading capability assign sessions initiation protocol message that above system embodiment of the present invention is current according to each application server, the load of each application server of balance to greatest extent, effectively allocating system resource.
Those of ordinary skills can recognize, the unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software clearly is described, the composition and the step of each example described prevailingly according to function in the above description.These functions still are that software mode is carried out with hardware actually, depend on the application-specific and the design constraint of technical scheme.The professional and technical personnel can use distinct methods to realize described function to each specific should being used for, but this realization should not thought and exceeds scope of the present invention.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (12)
1, a kind of method of load equalizer lateral load distribution is characterized in that, comprising:
Obtain at least two residual negative loading capability information that application server is current;
Determine the message distribute weightings of described application server according to the residual negative loading capability information of described application server;
Reception is from the first message of client-side session initiation protocol message, message distribute weightings according to described application server is selected one of them application server, the message first of described conversation initiating protocol message is sent to the application server processes of described selection.
2, method according to claim 1 is characterized in that, also comprises:
For each application server distributes the distribution sign;
The distribution sign of the application server of described reception conversation initiating protocol message is sent to the client of described transmission conversation initiating protocol message, in the subsequent message of the conversation initiating protocol message that sends, carry described distribution sign so that receive the client of described distribution sign;
Reception is extracted the application server distribution sign of carrying in the described subsequent message from the subsequent message of client-side session initiation protocol message, and this subsequent message is sent to described distribution sign corresponding application server.
3, method according to claim 1 is characterized in that, the application server that described load equalizer has under its command comprises: to the application server of this load equalizer registration.
4, method according to claim 1 is characterized in that, described obtaining has the current residual negative loading capability of each application server under its command and comprise:
Reception is from the heartbeat message of application server;
From described heartbeat message, resolve and extrapolate this application server residual negative loading capability.
5, method according to claim 4 is characterized in that, also comprises:
When load equalizer is not received heartbeat message from application server within a certain period of time, no longer with this application server as having application server under its command.
6, a kind of load equalizer is characterized in that, comprising:
Residual negative loading capability acquisition module is used to obtain at least two residual negative loading capabilities that application server is current;
Message distribute weightings determination module is used for determining according to the residual negative loading capability information of described application server the message distribute weightings of described application server;
Message transmission module first, be used to receive first message from the client-side session initiation protocol message, message distribute weightings according to described application server is selected one of them application server, and the message first of described conversation initiating protocol message is sent to this application server processes.
7, load equalizer according to claim 6 is characterized in that, also comprises:
Distribution sign distribution module is used to each application server to distribute the distribution sign;
Distribution sign sending module, be used for the distribution sign of the application server of described reception conversation initiating protocol message is sent to the client of described transmission conversation initiating protocol message, in the subsequent message of the conversation initiating protocol message that sends, carry described distribution sign so that receive the client of described distribution sign;
The subsequent message sending module is used to receive the subsequent message from the client-side session initiation protocol message, extracts the application server distribution sign of carrying in the described subsequent message, and this subsequent message is sent to described distribution sign corresponding application server.
8, load equalizer according to claim 6 is characterized in that, also comprises:
Removing module is used for not receiving heartbeat message from application server within a certain period of time when load equalizer, no longer with this application server as having application server under its command.
9, a kind of application server is characterized in that, comprising:
Sending module is used for sending the current residual negative loading capability information of present application server to load equalizer, and described residual negative loading capability information is used to the load capacity of representing that the current application server can also be born;
Receiver module is used for the conversation initiating protocol message that the balancing received load device is transmitted;
Processing module is used for described conversation initiating protocol message is handled.
10, application server according to claim 9 is characterized in that, also comprises:
Registering modules is used for initiating registration to load equalizer.
11, a kind of network system is characterized in that, comprising: load equalizer and at least two application servers, wherein:
Load equalizer is used to obtain at least two residual negative loading capability information that application server is current; Determine the message distribute weightings of described at least two application servers at least according to the residual negative loading capability information of described two application servers; Reception is from the first message of client-side session initiation protocol message, message distribute weightings according to described at least two application servers is selected one of them application server, the message first of described conversation initiating protocol message is sent to the application server processes of described selection;
Application server is used for sending the current residual negative loading capability information of present application server to load equalizer, and the conversation initiating protocol message from load equalizer is handled.
12, system according to claim 11 is characterized in that, load equalizer comprises:
Residual negative loading capability acquisition module is used to obtain at least two residual negative loading capabilities that application server is current;
Message distribute weightings determination module is used for determining according to the residual negative loading capability information of described at least two application servers the message distribute weightings of described at least two application servers;
Message transmission module first, be used to receive first message from the client-side session initiation protocol message, message distribute weightings according to described at least two application servers is selected one of them application server, and the message first of described conversation initiating protocol message is sent to this application server processes.
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