CN101267269B - Load balance implementation method and system in interactive network TV system - Google Patents
Load balance implementation method and system in interactive network TV system Download PDFInfo
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Abstract
The present invention discloses a method for realizing load balancing in an interactive network television system. The method comprises the following procedures: a procedure S202, collecting respective performance parameter by each edge electric program guiding server in a plurality of edge electric program guiding servers; a procedure S204, obtaining the performance parameter of each edge electric program guiding server by a main electric program guiding server thereby obtaining the capability value of each edge electric program guiding server and transmitting the capability value to a subscriber managing system; and a procedure S206, distributing the edge electric program guiding server to the subscriber by the subscriber managing system according to the capability value of each edge electric program guiding server. The invention also discloses a system for realizing load balancing in the interactive network television system.
Description
Technical field
The present invention relates to the communications field, and especially, relate to the implementation method and the system of load balancing in IPTV (IPTV) system.
Background technology
Interactive Web TV system is a kind of video media service business, and along with the continuous maturation of its technology and professional carrying out in a deep going way, its number of users is also continuing to increase.Therefore, also have higher requirement for the service performance of EPG system.
At the software and hardware system that huge public users colony, complicated service software operation support, need one flexibly and effectively the EPG load-balancing mechanism be very important.
Present load-balancing mechanism is in SMS (Subscriber Management System) grouping management to be carried out in EPG service, comprises one or more EPG servers in each EPG group, each EPG corresponding one group of IP address field that divides into groups.When the user logins, determine by load balancing the user provides service by which EPG server, and carry out load balancing according to user's IP address and these two factors of ownership edge EPG.
Concrete, as shown in Figure 1, basic process is as follows:
Step 1 judges whether the user has distributed ownership EPG server;
On the one hand, distributed the user under the situation of ownership EPG server, judged whether this server state is normal; If state is normal, then to return this EPG server and be user's service, flow process finishes; If abnormal state then is that the normal EPG server of the interim distribution state of user is user's service in the grouping of user attaching EPG server, flow process finishes;
On the other hand, if the still unallocated EPG server of user, then execution in step two;
Step 2 judges whether the user has distributed ownership EPG grouping; If the user is still unallocated, then determine user attaching EPG grouping according to subscription client IP address, continue the aftermentioned flow process then; If the user has distributed ownership EPG grouping, then continue execution in step three;
Step 3 in user attaching EPG grouping, is selected user attaching EPG server, and concrete principle is as follows: (1) this user's EPG belongs to the EPG grouping of ownership; (2) this EPG state is normal; (3) the home subscriber number of this EPG is minimum in current group;
Step 4 is returned, and flow process finishes.
Because the foundation of currently used distribution mechanism is user's IP address and number of users, therefore, distribution is static.
Will there be following problem like this, that is, can not reflects the performance in actual moving process of each edge EPG well.For example, when the load of certain edge EPG is very heavy, new user's login is arranged again, main EPG is according to this user's the IP and the EPG grouping of ownership, may be still can be with the user this be assigned to the service of getting on of this edge EPG, cause this EPG performance poorer.And meanwhile, may be same the number of users of other edge EPGs in the EPG grouping and few, it is very little load, and its performance is far superior to this EPG server, so has wasted remaining service ability.
It is not enough that the reasons for the above problems are that SMS understands the practical operation situation of each EPG in the EPG grouping and every performance index, can be for reference have only this unique criterion of number of users, make load balancing become simple user and count balance.
Therefore, how to design effectively, EPG load balancing strategy has been called reliably becomes the important topic that interactive Web TV system faces.Yet, the technical scheme that can realize effectively that EPG server group load balancing is distributed is not proposed at present as yet.
Summary of the invention
Consider the problems referred to above and make the present invention, for this reason, main purpose of the present invention is to provide the implementation method and the system of load balancing in a kind of interactive Web TV system, make EPG server group under the situation of high load capacity, automatically the user is distributed or moves to the EPG server of better performances, shorten user's response time, improve the quality of service.
According to an aspect of the present invention, the implementation method of load balancing in a kind of interactive Web TV system is provided, has been used in interactive Web TV system comprises the grouping of a main epg server and a plurality of edges epg server, realizing that the equilibrium of load distributes.
Implementation method according to load balancing in the interactive Web TV system of the embodiment of the invention comprises: step S202, and each the edge epg server in a plurality of edges epg server is collected its performance parameter separately; Step S204, main epg server obtains the performance parameter of each edge epg server, obtains the performance data of each edge epg server thus, and performance data is reported Subscriber Management System; Step S206, Subscriber Management System is distributed to the user according to the performance data of each edge epg server with the edge epg server,
Wherein, in step S206, further comprise: Subscriber Management System is determined the service ability of each edge epg server according to performance data, wherein, the processing of determining the service ability of each edge epg server is specially: the first threshold and second threshold value that average behavior data or accumulative total performance data are set, wherein, first threshold is less than second threshold value; Average behavior data or accumulative total performance data are defined as one-level greater than the service ability of the edge epg server of second threshold value, and this edge epg server is not accepted any Adding User; Average behavior data or accumulative total performance data are defined as secondary less than second threshold value and greater than the service ability of the edge epg server of first threshold, and this edge epg server only accepts to belong to the user of this edge epg server; Average behavior data or accumulative total performance data are defined as three grades less than the service ability of the edge epg server of first threshold, and this edge epg server is accepted to belong to the user of this edge epg server and increase new user.
According to another aspect of the present invention, the realization system of load balancing in a kind of interactive Web TV system is provided, has been used in interactive Web TV system comprises the grouping of a main epg server and a plurality of edges epg server, realizing that the equilibrium of load distributes.
Realization system according to load balancing in the interactive Web TV system of the embodiment of the invention comprises: the parameter collection module, be positioned at each edge epg server, be used for collecting the performance parameter of a plurality of edges each edge epg server of epg server; The performance data acquisition module, be positioned at main epg server, be used for obtaining the performance parameter of a plurality of edges each edge epg server of epg server, obtain the performance data of each edge epg server thus, and performance data is reported Subscriber Management System; And distribution module, be used for the edge epg server being distributed to the user according to the service performance data of each edge epg server,
Wherein, distribution module also comprises: the service ability acquisition module is used for determining according to performance data the service ability of each edge epg server;
Wherein, the service ability acquisition module also comprises: module is set, is used to be provided with the first threshold and second threshold value of average behavior data or accumulative total performance data, wherein, first threshold is less than second threshold value; First definition module be used for average behavior data or accumulative total performance data are defined as one-level greater than the service ability of the edge epg server of second threshold value, and this edge epg server is not accepted any Adding User; Second definition module, average behavior data or accumulative total performance data are defined as secondary less than second threshold value and greater than the service ability of the edge epg server of first threshold, and this edge epg server only accepts to belong to the user of this edge epg server; The 3rd definition module, be used for average behavior data or accumulative total performance data are defined as three grades less than the service ability of the edge epg server of first threshold, and this edge epg server is accepted to belong to the user of this edge epg server and increase new user.
By technique scheme of the present invention, adopt the method for each EPG data of dynamic acquisition, the performance of each EPG in the real-time detection grouping, and according to its service ability, carrying out corresponding load shares, shortened user's response time, improved service quality, guaranteed that the interactive Web TV system user obtains in time and service fast.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the load balancing scheme of prior art;
Fig. 2 is the flow chart according to load-balancing method in the interactive Web TV system of the inventive method embodiment;
Fig. 3 is the signaling process figure according to load-balancing method in the interactive Web TV system of the inventive method embodiment; And
Fig. 4 is the block diagram of SiteServer LBS in the interactive Web TV system of system according to the invention embodiment.
Embodiment
In conjunction with the accompanying drawings the preferred embodiments of the present invention are described down, 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.
Method embodiment
In the present embodiment, provide a kind of method of load balancing, be used in interactive Web TV system comprises the grouping of a main epg server and a plurality of edges epg server, realizing that the equilibrium of load distributes.
As shown in Figure 2, according to load-balancing method in the interactive Web TV system of the inventive method embodiment, may further comprise the steps:
Step S202, each edge EPG in a plurality of edge EPGs is collected its performance parameter separately;
Step S204, main EPG obtains the performance parameter of each edge EPG, obtains the performance number of each edge EPG thus, and with performance number and report Subscriber Management System; And
Step S206, Subscriber Management System is distributed to the user according to the performance number of each edge EPG with edge EPG.
In the method, the performance parameter that each edge EPG is collected comprises at least one or its combination in the following parameter type: the average response time of average load, the page, online user number, time waiting, CPU usage, memory usage, and, in step S202 or before step S202, further comprise: the parameter type of specifying a plurality of edge EPGs to collect in advance.
And step S204 may further include: each type parameter that comprises in the performance parameter to the edge EPG collection is provided with weights respectively, and obtains the performance number of each edge EPG according to weights.
Step S204 can further include: main EPG regularly obtains the performance number of each edge EPG, and when the performance number of each edge EPG that obtains reaches predetermined quantity, obtains each edge EPG average behavior value or accumulative total performance number separately respectively.
In described step S206, further comprise: described Subscriber Management System is determined the service ability of described each edge epg server according to described performance number.
Particularly, determine that the processing of the service ability of described each edge epg server is specially: the first threshold and second threshold value of average behavior value or accumulative total performance number are set, and wherein, first threshold is less than second threshold value; Average behavior value or accumulative total performance number are defined as one-level greater than the service ability of the edge EPG of second threshold value, and this edge EPG is not accepted any Adding User; Average behavior value or accumulative total performance number are defined as secondary less than second threshold value and greater than the service ability of the edge EPG of first threshold, and this edge EPG only accepts to belong to the user of this edge EPG; Average behavior value or accumulative total performance number are defined as three grades less than the service ability of the edge EPG of first threshold, and this edge EPG is belonged to the user of this edge EPG and is increased new user.
Wherein, be that the edge EPG of one-level has been refused under new login and user's that belong to this edge EPG the situation in service ability, Subscriber Management System is that three grades edge EPG is distributed to unaccepted user with service ability.
Below in conjunction with instantiation the present invention is described.
Implementation method according to load balancing in the interactive Web TV system of the inventive method example can be carried out user's distribution according to the real-time performance of EPG, only with number of users as performance index, but be not unique index.
Preferably, realize in the process of the present invention in reality, can be by the real-time performance of each edge EPG in the main EPG timing acquiring grouping, after the intensive data (that is, above-mentioned performance parameter), by the DAS interface, report Subscriber Management System (SMS), SMS is each data of analysis-by-synthesis again, and the performance of all EPG in dividing into groups is sorted, and an EPG server selecting best performance then provides service for the user.
As shown in Figure 3, in actual application, this method can may further comprise the steps:
Step 1, jar program of main EPG deploy, the every performance data that is used for timing acquiring and collects each edge EPG in the grouping;
Step 2 on each edge EPG, is disposed a JSP page, be used to collect this machine every performance data;
Step 3, main EPG puts the data of collecting in order, regularly sends the performance data (performance number that comes out according to algorithm computation) of each EPG to SMS;
Step 4, SMS reprocesses the data of sending of main EPG, and calculates performance rank and the service ability of each EPG in the grouping;
Step 5, SMS according to certain strategy, selects a best performance or a more excellent edge EPG when load balancing, serve;
The type of the data (parameter) of gathering is as the safe criterion of weighing EPG server current performance, for realizing that the present invention is very important.Performance data is a comprehensive performance data, also is experience accumulation data, and the main at present parameter that adopts is as follows:
(1) average load (Load Average): in linux system, orders such as uptime, w, top all can have the output of the average load load average of system, system's average load is defined in the average process number in the operation queue in the specified time interval, particularly, it will be arranged in operation queue if process meets the following conditions:
This process is not in the result who waits for the I/O operation;
This process does not initiatively enter wait state (just not calling ' wait ');
This process is not stopped (for example: wait for stopping).
For example: [root@www2 init.d] #uptime
7:51pm?up?2days，5:43，2users，load?average：8.13，5.90，4.94，
Average number of processes in the past 1,5,15 minute of the last content representation of this order output in the operation queue.
In general as long as it is good with regard to the performance that this system is described that the current active process number of each CPU is not more than 3, if the number of tasks of each CPU greater than 5, has serious problems with regard to the performance of representing this machine so.For top example, supposing the system has two CPU, and the current task number of its each CPU is so: 8.13/2=4.065.This represents that the performance of this system is an acceptable.
And, because this parameter is a kind of method of simulating floating-point operation very fast, can comparatively accurately reflect the load of system, therefore should provide higher weight ratio.
(2) average response time of specific webpage: EPG timer access specific performance properties detects the page, obtain the response time of the page, comprise typical operation flow in these specific pages, this parameter has bigger reference value equally, therefore needs to distribute bigger weight ratio;
(3) online user number: this parameter has certain significance for reference to performance, but this parameter is relevant with the performance of machine, is difficult to weigh with a fixed value;
(4) number of time waiting (Time_wait): the reference significance that this parameter has performance.This is worth when higher, and the EPG performance may be not poor yet, so bad quantification;
(5) CPU usage: this parameter has certain significance for reference to the EPG performance, but can not rely on certificate as important number;
(6) memory usage: this parameter has certain significance for reference to the EPG performance, but can not be as important dependence data;
For these parameters, main EPG per minute image data once according to its different importance, gives different weight ratios, calculates the performance rank of each edge EPG in the grouping, as the parameter index of the relative performance of weighing the EPG server.Simultaneously, calculate these two important parameters of response time of the load Average and the page, as the standard of the absolute service ability of weighing EPG.After calculating these data, report SMS.
In actual applications, the detailed process of measurement and calculating EPG performance index is as follows:
One, the acquisition methods of the absolute service ability of each EPG is as follows:
(1) per minute gather all EPG all kinds of performance datas once;
(2) calculate nearest 10 times mean value, as the foundation of this measurement;
(3) service ability is divided into three grades of states, that is, three kinds of states of GOOD, NORMAL and BAD, corresponding respectively following various conditions:
A.Load?Average＞5
B.3＜Load?Average＜5
C.Load?Average＜3
D. the average response time of specified page＞certain higher limit
E. the average response time of specified page＜certain lower limit
F. the average response time of specified page is up and down between two restrictions
Wherein, the higher limit of page response time and lower limit are determined in laboratory test, because be the visit and the response time performance of gathering this machine specific webpage, so the influence of network environment can not considered.
Judge that each EPG has or not the method for service ability as shown in table 1:
| The average response time of the load Average page | ＜3? | ?3＜Value＜5? | ＞5? |
| Response＜lower limit | GOOD? | ?GOOD? | NORMAL? |
| Lower limit＜Response＜higher limit | GOOD? | ?NORMAL? | BAD? |
| Response＞higher limit | NORMAL? | ?BAD? | BAD? |
Table 1
The per minute sampling value of EPG load Average and mean value and service ability are as shown in table 2, are that 3 and second threshold value is the ability value of each EPG under 5 the situation in first threshold as can be seen from Table 2:
Table 2
Two, the relative performance arrangement method of each EPG is as follows:
(1), calculates the current performance rank of each EPG, as the EPG relative performance index of weighing in the grouping according to the parameter of above-mentioned collection.
(2) above-mentioned data are reported SMS, SMS carries out load balancing according to these data.
The real-time performance data of each EPG are as shown in table 3 in the grouping:
Table 3
The performance sequencing table (nearest 10 mean values) of each EPG is as shown in table 4 in the grouping:
Table 4
Three, in the SMS side, processing procedure is as follows:
(1) absolute service ability is the EPG server of GOOD, can accept to belong to the user of this machine and the user who comes the user and newly open of other EPG load balancing;
(2) absolute service ability is the EPG server of NORMAL, can accept to belong to the user of this machine, but does not advise accepting user that other EPG load balancing come, do not accept the user that newly opens;
(3) absolute service ability is the EPG server of BAD, the Any user service that can not accept to increase newly;
(4) for the non-user of login first, the EPG of its ownership determines that when login, SMS judges that whether the EPG of its ownership has the ability to serve, if having the ability, is dispensed to this user the EPG of ownership; If there is not service ability, then in the EPG grouping, select an EPG of best performance to provide service for this user.The purpose of doing like this, mainly be to consider: user's breakpoint recall info and Information on Collection have been retained on the EPG of ownership, SMS should consider that this EPG can continue to provide under the prerequisite of service, even be not the server of current performance optimum, also should continue as its user of ownership service is provided, thereby avoid too much data migration, cause the overhead of performance.
System embodiment
In the present embodiment, provide the realization system of load balancing in a kind of interactive Web TV system, be used in interactive Web TV system comprises the grouping of a main EPG and a plurality of edge EPGs, realizing that the equilibrium of load distributes.
As shown in Figure 4, the realization system of load balancing comprises in the interactive Web TV system of system according to the invention embodiment: parameter collection module 402, be positioned at each edge EPG, and be used for collecting the performance parameter of a plurality of each edge EPG of edge EPG; Performance number acquisition module 404 is positioned at main EPG, is used for obtaining the performance parameter of a plurality of each edge EPG of edge EPG, obtains the performance number of each edge EPG thus, and with performance number and report Subscriber Management System; And distribution module 406, be used for edge EPG being distributed to the user according to the performance number of each edge EPG.
In this system, the performance parameter that parameter collection module 402 is collected comprises at least one or its combination in the following parameter type: the average response time of average load, the page, online user number, time waiting, CPU usage, memory usage.
Wherein, said system further comprises: weights are provided with the module (not shown), are used to be provided with the weights of every kind of parameter, and performance number acquisition module 404 obtains performance number according to performance parameter of collecting and corresponding weights; Service ability acquisition module (not shown) is used for determining according to described performance number the service ability of each described edge epg server, and distribution module 406 is carried out the distribution of EPG based on the performance number that obtains.
Sum up foregoing, the present invention adopts the method for each EPG data of dynamic acquisition, the performance of each EPG in the real-time detection grouping, and according to its service ability, carrying out corresponding load shares, improve the service ability of whole system, reached effect preferably, thereby realized truly dynamic load leveling.
By technique scheme of the present invention, adopt the method for each EPG data of dynamic acquisition, the performance of each EPG in the real-time detection grouping, and according to its service ability, carrying out corresponding load shares, shortened user's response time, improved service quality, guaranteed that the interactive Web TV system user obtains in time and service fast.
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 (8)
1. the implementation method of load balancing in the interactive Web TV system, be used in described interactive Web TV system comprises the grouping of a main epg server and a plurality of edges epg server, realizing that the equilibrium of load distributes, it is characterized in that described method comprises:
Step S202, each the edge epg server in described a plurality of edges epg server is collected its performance parameter separately;
Step S204, described main epg server obtains the performance parameter of described each edge epg server, obtain the performance data of described each edge epg server thus, and described performance data is reported Subscriber Management System;
Step S206, described Subscriber Management System is distributed to the user according to the performance data of described each edge epg server with the edge epg server,
Wherein, in described step S206, further comprise:
Described Subscriber Management System is determined the service ability of described each edge epg server according to described performance data,
Wherein, the processing of determining the service ability of described each edge epg server is specially:
The first threshold and second threshold value of average behavior data or accumulative total performance data are set, and wherein, described first threshold is less than described second threshold value;
Average behavior data or accumulative total performance data are defined as one-level greater than the service ability of the edge epg server of described second threshold value, and this edge epg server is not accepted any Adding User;
Average behavior data or accumulative total performance data are defined as secondary less than described second threshold value and greater than the service ability of the edge epg server of described first threshold, and this edge epg server only accepts to belong to the user of this edge epg server;
Average behavior data or accumulative total performance data are defined as three grades less than the service ability of the edge epg server of described first threshold, and this edge epg server is accepted to belong to the user of this edge epg server and increase new user.
2. method according to claim 1, it is characterized in that, the described performance parameter that described each edge epg server is collected comprises at least one or its combination in the following parameter type: the average response time of average load, the page, online user number, time waiting, CPU usage, memory usage, and in described step S202 or before described step S202, further comprise: the parameter type of specifying described a plurality of edges epg server to collect in advance.
3. method according to claim 2 is characterized in that, described step S204 further comprises:
Each type parameter that comprises in the described performance parameter to the collection of described edge epg server is provided with weights respectively, and obtains the performance data of described each edge epg server according to described weights.
4. method according to claim 3 is characterized in that, described step S204 further comprises:
Described main epg server regularly obtains the performance data of described each edge epg server, and when the performance data of described each the edge epg server that obtains reaches predetermined quantity, obtain described each edge epg server average behavior data or accumulative total performance data separately respectively.
5. method according to claim 1, it is characterized in that, in service ability is that the edge epg server of one-level has been refused under new login and user's that belong to this edge epg server the situation, and described Subscriber Management System is that three grades edge epg server is distributed to unaccepted described user with service ability.
6. the realization system of load balancing in the interactive Web TV system, be used in described interactive Web TV system comprises the grouping of a main epg server and a plurality of edges epg server, realizing that the equilibrium of load distributes, it is characterized in that the realization system of described load balancing comprises:
The parameter collection module is positioned at each edge epg server, is used for collecting the performance parameter of described a plurality of described edges each edge epg server of epg server;
The performance data acquisition module, be positioned at described main epg server, be used for obtaining the performance parameter of described a plurality of edges each edge epg server of epg server, obtain the performance data of described each edge epg server thus, and described performance data is reported Subscriber Management System; And
Distribution module is used for according to the service performance data of described each edge epg server the edge epg server being distributed to the user,
Wherein, described distribution module also comprises:
The service ability acquisition module is used for determining according to described performance data the service ability of described each edge epg server,
Wherein, described service ability acquisition module also comprises:
Module is set, is used to be provided with the first threshold and second threshold value of average behavior data or accumulative total performance data, wherein, described first threshold is less than described second threshold value;
First definition module be used for average behavior data or accumulative total performance data are defined as one-level greater than the service ability of the edge epg server of described second threshold value, and this edge epg server is not accepted any Adding User;
Second definition module, average behavior data or accumulative total performance data are defined as secondary less than described second threshold value and greater than the service ability of the edge epg server of described first threshold, and this edge epg server only accepts to belong to the user of this edge epg server;
The 3rd definition module, be used for average behavior data or accumulative total performance data are defined as three grades less than the service ability of the edge epg server of described first threshold, and this edge epg server is accepted to belong to the user of this edge epg server and increase new user.
7. system according to claim 6 is characterized in that, the described performance parameter that described parameter collection module is collected comprises at least one or its combination in the following parameter type:
The average response time of average load, the page, online user number, time waiting, CPU usage, memory usage.
8. system according to claim 6, it is characterized in that, further comprise: weights are provided with module, are used to be provided with the weights of every kind of parameter, and described performance data acquisition module obtains described performance data according to performance parameter of collecting and corresponding weights.
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