CN101764747A - Intelligent dispatching method, device and system of content delivery network flow - Google Patents
Intelligent dispatching method, device and system of content delivery network flow Download PDFInfo
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- CN101764747A CN101764747A CN200910244007A CN200910244007A CN101764747A CN 101764747 A CN101764747 A CN 101764747A CN 200910244007 A CN200910244007 A CN 200910244007A CN 200910244007 A CN200910244007 A CN 200910244007A CN 101764747 A CN101764747 A CN 101764747A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1004—Server selection for load balancing
- H04L67/1021—Server selection for load balancing based on client or server locations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/45—Network directories; Name-to-address mapping
- H04L61/4505—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols
- H04L61/4511—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols using domain name system [DNS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2101/00—Indexing scheme associated with group H04L61/00
- H04L2101/60—Types of network addresses
- H04L2101/69—Types of network addresses using geographic information, e.g. room number
Abstract
The invention discloses an intelligent dispatching method, a device and a system of content delivery network flow. The intelligent dispatching method comprises: receiving a domain name resolution request which is sent by a local DNS through a subdomain which is provided by a website domain authority DNS; according to the domain name resolution request, obtaining the IP address of the local DNS; utilizing the IP address to indentify the geographic location of the local DNS and network service provider ISP information; according to the geographic location and the ISP information, selecting a CDN service provider on the basis of a preset rule; sending a domain corresponding to the name of the selected CDN service provider to the local DNS. The invention builds an intelligent dispatching center between the existing CDN network frame and an operator website; when accessing the network of the operator, a netizen selects a proper CDN service provider according to the preset rule. The invention ensures that the operator can flexibly replace the existing CDN service provider so as to lead the operator to obtain CDN service with better cost performance.
Description
Technical field
The present invention relates to networking technology area, more particularly, relate to content delivery network flow intelligent dispatching method, Apparatus and system.
Background technology
The English full name of DNS is Domain Name System, and its Chinese is a domain name system, and this system is used for naming computer and the network service that is organized into the domain hierarchy structure.Between domain name on the Internet and IP address (perhaps many-one) one to one, though domain name is convenient to people's memory, but can only be familiar with the IP address mutually between the machine, conversion work between them is called domain name mapping, domain name mapping need be finished by special domain name resolution server, and DNS is exactly the server that carries out domain name mapping.The DNS name is used for TCP/IP networks such as Internet, by user-friendly name lookup computer and service.When the user imported dns name and claims in application program, the DNS service can be other associated information with this name resolving, as the IP address.Because the domain name of input when online is to resolve by domain name analysis system to have found corresponding IP address, like this could access websites.In fact, the final sensing of domain name is IP.
The English full name of CDN is Content Delivery Network, and its Chinese is a content distributing network.The CDN technology is a kind of not effective means of good problem of internet performance that solves of at first rising and developing rapidly in the U.S. in recent years.Its basic ideas are exactly to avoid might influencing on the Internet bottleneck and the link of data transmission bauds and stability as far as possible, make the faster, more steady of content delivery.One deck intelligent virtual network on basis, existing the Internet that is constituted by placing node server everywhere at network, the cdn system can be in real time leads user's request on the nearest service node of user again according to being connected of network traffics and each node, load state and to integrated informations such as user's distance and response times.The purpose of this system is by increase the new network architecture of one deck in existing Internet, the content of website is distributed to network " edge " near the user, make the user can obtain required content nearby, solve the situation of Internet network congestion, improve the response speed of user capture website.Solve the slow-footed problem of user capture websites response little owing to the network bandwidth, that the user capture amount is big, the unequal reason of network point distribution is caused technically comprehensively.
According to statistics, adopt the CDN technology, can handle 70%～95% access to content amount of whole Website page, alleviate the pressure of server, promoted the performance and the extensibility of website.Therefore, shift content the edge of network onto,, thereby guarantee that the quality of service has just become a kind of conspicuous selection with visit order on the whole network for the user provides the edge service of property nearby.And Here it is content delivery network (CDN) service mode.The foundation of CDN has solved the dilemma of the content " centralization and decentralization " of puzzlement content operator, is valuable for making up good the Internet value chain undoubtedly, also is that service is quickened in indispensable optimum website.
For understanding CDN better, let us is had a look the workflow of CDN.When netizen visit has added the website of CDN service, at first determine simultaneously this node to be pointed in netizen's request near netizen's best CDN node by the DNS redirecting technique.When netizen's request arrived specified node, the server of CDN (high-speed cache on the node) was responsible for the content of netizen's request is offered the netizen.Idiographic flow is: the netizen imports the domain name of the website that will visit in the browser of oneself, browser is to the parsing of local dns request to this domain name, local dns server is dealt into request the primary dns server of website, primary dns server is determined optimal at that time CDN service provider according to a series of strategy, and the IP address of this CDN service provider issued local dns, local dns sends to netizen's browser with the IP address of CDN service provider, and netizen's browser is asked the content of corresponding website to this CDN service provider according to this IP address.
But along with popularizing gradually that CDN uses, some problems also slowly manifest:
Under existing C DN Service Operation pattern, a tame CDN service provider can only be selected by the operator of website, can't use the service of a plurality of CDN service provider simultaneously, if it is bigger that the network pressure of problem or this CDN service provider has appearred in the CDN service provider that is using, owing to do not have standby CDN service provider, then can directly influence the quality of website for netizen's service.And, in case a tame CDN service provider has been selected by the operator of website, just be difficult to move to CDN service provider of another family, because in transition process, can cause the website that longer a period of time of netizen can't access operator, CDN service provider of another family can or not moved to usually for the consideration of website stability in operator.Even other CDN service provider provides the service of higher price-performance ratio, website operator can not change CDN service provider yet.Therefore, under existing C DN service mode, website operator can't change service provider flexibly, also can't use a plurality of CDN service provider, causes operator can't obtain the more CDN service of dominance price ratio, can't provide better service for the netizen simultaneously.
Summary of the invention
In view of this, the invention provides a kind of content delivery network flow intelligent dispatching method, Apparatus and system, so that make operator obtain the more CDN service of dominance price ratio.
The embodiment of the invention is achieved in that
A kind of CDN flow quantity intelligent dispatching method comprises:
The domain name mapping request that the subdomain name that receiving local domain name server DNS provides by website domain name authority DNS sends;
Obtain the IP address of described local dns according to the domain name analysis request;
Utilize described IP Address Recognition to go out the geographical position and the Internet Service Provider ISP of described local dns;
According to described geographical position and ISP, according to preset rules chosen content distributing network CDN service provider;
The domain name of selecteed described CDN service provider is sent to described local dns.
Preferably, in above-mentioned CDN flow quantity intelligent dispatching method, described preset rules is manually tactful, and the idiographic flow of the described CDN of described manual policy selection service provider is:
Set up the mapping table of described CDN service provider and described geographical position, ISP and selected probability;
In described mapping table, select the CDN service provider that geographical position and ISP with described local dns are complementary according to default matching way;
According to described selected probability, select the described CDN service provider that is complementary.
Preferably, in above-mentioned CDN flow quantity intelligent dispatching method, the particular content of selecting the CDN service provider that geographical position and ISP with described local dns be complementary according to default matching way is:
1), judges whether comprise all identical with the geographical position of described local dns described CDN service provider in the described mapping table) if then select described CDN service provider, if not, then enter step 2 with ISP;
2), judge identical and described CDN not specified geographic location the service provider of the ISP that whether comprises in the described mapping table with described local dns, if, then select described CDN service provider, if not, then enter step 3);
3), judge whether comprise described CDN identical with the geographical position of described local dns and not assigned I SP service provider in the described mapping table, if, then select described CDN service provider, if not, then enter step 4);
4), judge whether comprise specified geographic location not and the described CDN service provider of assigned I SP not in the described mapping table, if, then select described CDN service provider, if not, the default CDN service provider of selective system then.
Preferably, in above-mentioned CDN flow quantity intelligent dispatching method, described preset rules is tactful automatically, and the idiographic flow of the described CDN of described automatic policy selection service provider is:
Calculate the response delay between described local dns and the described CDN service provider;
Select the CDN service provider of the numerical value minimum of corresponding described response delay.
A kind of CDN flow quantity intelligent dispatching device comprises: receiver module, acquisition module, identification module, processing module and sending module;
Described receiver module, the domain name mapping request that the subdomain name that being used to receive local domain name server DNS provides by website domain name authority DNS sends;
Described acquisition module is used for obtaining according to the domain name analysis request IP address of described local dns;
Described identification module is used to the geographical position and the Internet Service Provider ISP that utilize described IP Address Recognition to go out described local dns;
Described processing module is used for according to described geographical position and ISP, according to preset rules chosen content distributing network CDN service provider;
Described sending module is used for the domain name of selecteed described CDN service provider is sent to described local dns.
Preferably, in above-mentioned CDN flow quantity intelligent dispatching device, described processing module comprises creating unit, matching unit and selected cell;
Described creating unit is used to set up the mapping table of described CDN service provider and described geographical position, ISP and selected probability;
Described matching unit is used at described mapping table, selects the CDN service provider that geographical position and ISP with described local dns are complementary according to default matching way;
Described selected cell is used for according to described selected probability, selects the described CDN service provider that is complementary.
Preferably, in above-mentioned CDN flow quantity intelligent dispatching device, described processing module comprises computing unit and selected cell;
Described computing unit is used to calculate the response delay between described local dns and the described CDN service provider;
Described selected cell is used to select the CDN service provider of the numerical value minimum of corresponding described response delay.
A kind of CDN flow quantity intelligent dispatching patcher comprises: CDN flow quantity intelligent dispatching device, the DNS of CDN service provider and website domain name authority DNS;
Described website domain name authority DNS is used to receive the domain name mapping request of local dns, and the domain name of described CDN flow quantity intelligent dispatching device is sent to described local dns;
Described CDN flow quantity intelligent dispatching device is used to receive the domain name mapping request of described local dns, selects CDN service provider according to preset rules, and the domain name of described CDN service provider is sent to described local dns;
The described CDN DNS of service provider is used to receive the domain name mapping request of described local dns, and the IP address is sent to described local dns.
Compared with prior art, the technical scheme that provides of the embodiment of the invention has the following advantages and characteristics:
From technical scheme of the present invention as can be seen, content delivery network flow intelligent dispatching method disclosed by the invention, device and system, be between the operator of existing CDN service provider and website, to set up an intelligent scheduling center, so that website operator can use a plurality of CDN service provider simultaneously, and can change CDN service provider flexibly, thereby avoid to use under the existing pattern drawback of a CDN service provider, even one in a plurality of CDN service provider that website operator uses goes wrong, can not cause the situation that the netizen can't access websites yet, because also have other CDN service provider that service can be provided, so just reduced the risk that breaks down in the website.Because the present invention can make operator use a plurality of CDN service provider, so in the time of need changing CDN service provider in website operator, do not need to consider the problem of the stability of website fully, because in the process of changing a tame CDN service provider, also have other CDN service provider working, so the situation that the netizen can't the website can not occur for website operator.When the website of netizen's access operator, the intelligent scheduling center obtains the geographical position and the ISP of local dns, and selects the CDN service provider that is fit to according to preset rules according to this geographical position and ISP.For the operator of website, the intelligent scheduling center makes operator can use the service of a plurality of CDN service provider simultaneously, and make operator can change existing C DN service provider flexibly, so that make operator obtain the more CDN service of dominance price ratio, bring better service for the netizen simultaneously.
Description of drawings
In order to be illustrated more clearly in the present 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.
The flow chart of the CDN flow quantity intelligent dispatching method that Fig. 1 provides for the embodiment of the invention;
The flow chart of the manual strategy that Fig. 2 provides for the embodiment of the invention 1;
The flow chart of the automatic strategy that Fig. 3 provides for the embodiment of the invention 2;
The flow chart of the match pattern step 1 that Fig. 4 provides for the embodiment of the invention 1;
The flow chart of the match pattern step 2 that Fig. 5 provides for the embodiment of the invention 1;
The flow chart of the match pattern step 3 that Fig. 6 provides for the embodiment of the invention 1;
The flow chart of the match pattern step 4 that Fig. 7 provides for the embodiment of the invention 1;
Fig. 8 is the schematic diagram of CDN flow quantity intelligent dispatching device disclosed by the invention;
Fig. 9 is the schematic diagram of the CDN flow quantity intelligent dispatching device of manual strategy provided by the invention;
Figure 10 is the schematic diagram of the CDN flow quantity intelligent dispatching device of automatic strategy provided by the invention;
Figure 11 is the schematic diagram of CDN flow quantity intelligent dispatching patcher disclosed by the 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 only 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.
Embodiment one
See also shown in Figure 1ly, the embodiment of the invention provides a kind of CDN flow quantity intelligent dispatching method, and this method specifically comprises:
Step S1: the domain name mapping request that the subdomain name that receiving local domain name server DNS provides by website domain name authority DNS sends;
Step S2: the IP address that obtains described local dns according to the domain name analysis request;
Step S3: utilize described IP Address Recognition to go out the geographical position and the Internet Service Provider ISP of described local dns;
Step S4: according to described geographical position and ISP, according to preset rules chosen content distributing network CDN service provider;
Step S5: the domain name of selecteed described CDN service provider is sent to described local dns.
See also shown in Figure 2ly, in said method step S4, preset rules is manual strategy, and manually the idiographic flow of policy selection CDN service provider is:
Step S41: the mapping table of setting up described CDN service provider and described geographical position, ISP and selected probability;
Step S42: in described mapping table, select the CDN service provider that geographical position and ISP with described local dns are complementary according to default matching way;
Step S43:, select the described CDN service provider that is complementary according to described selected probability.
In said method step S42, the particular content that default matching way is selected the CDN service provider that geographical position and ISP with described local dns be complementary is:
Step is 1.: sees also shown in Figure 4ly, judges whether comprise all identical with the geographical position of described local dns described CDN service provider in the described mapping table with ISP, if, then select described CDN service provider, if not, then enter step 2.;
Step is 2.: sees also shown in Figure 5ly, judges identical and described CDN not specified geographic location the service provider of the ISP that whether comprises in the described mapping table with described local dns, if, then select described CDN service provider, if not, then enter step 3.;
Step is 3.: sees also shown in Figure 6ly, judges whether comprise described CDN identical with the geographical position of described local dns and not assigned I SP service provider in the described mapping table, if, then select described CDN service provider, if not, then enter step 4.;
Step is 4.: sees also shown in Figure 7ly, judges whether comprise specified geographic location not and the described CDN service provider of assigned I SP not in the described mapping table, if, then select described CDN service provider, if not, the default CDN service provider of selective system then.
Illustrate the specific implementation process of said method below, the website domain name of supposing netizen's visit is www.example.com, the subdomain of website is called example.com.idns.org, CDN flow quantity intelligent scheduling DNS is the mandate dns server of subdomain name example.com.idns.org, website www.example.com domain name mapping is to example.com.idns.org, website www.example.com uses the content service of CDN A of service provider and B, and the domain name of A of CDN service provider and B sees also table 1:
Table 1
| CDN name service merchant title | Domain name |
| ??A | ??example.com.cdna.com |
| ??B | ??example.com.cdnb.com |
When importing website www.example.com in the browser of netizen at oneself, browser is to the parsing of local dns request to www.example.com, local dns is dealt into website domain name authority DNS with request, website domain name authority DNS sends to local dns with the subdomain name of website www.example.com, local dns sends the IP address that obtains example.com.idns.org to CDN flow quantity intelligent scheduling DNS, the IP address that CDN flow quantity intelligent scheduling DNS obtains local dns earlier, and according to geographical position and the ISP information of this IP address lookup to correspondence, the geographical position of supposing local dns is " Beijing ", and ISP is " a new UNICOM ".
Website operator sets up the title of CDN service provider and the mapping table of geographical position, ISP and selected probability, wherein, selected probability is exactly the selected probability of CDN, its concrete numerical value can set up on their own according to the actual conditions of website operator, supposes that the content that website operator inserts is as shown in table 2:
Table 2
| Sequence number | CDN service provider | The geographical position | ??ISP | Selected probability |
| ??1 | ?A | Beijing | Do not specify | ??30％ |
| ??2 | ?B | Beijing | Do not specify | ??70％ |
| ??3 | ?B | Beijing | Gehua Cable | ??100％ |
| ??4 | ?A | Do not specify | Telecommunications | ??100％ |
| ??5 | ?A | Do not specify | Do not specify | ??60％ |
| ??6 | ?B | Do not specify | Do not specify | ??40％ |
In above-mentioned mapping table,, select the CDN service provider that geographical position and ISP with described local dns are complementary according to default matching way; Suppose that default matching way according to the order of priority is: the geographical position of the ISP＞appointment of the ISP of the geographical position+appointment of appointment＞unspecified geographical position+appointment+unspecified ISP＞unspecified geographical position+unspecified ISP.
Table on the correspondence, the sequence number of according to priority descending matching order is: 3＞4＞(1,2)＞(5,6), mate with the geographical position and the ISP of local dns successively according to the order of above-mentioned priority according to last table content.The geographical position of local dns is " Beijing ", and ISP is " new UNICOM ", and corresponding with sequence number 3 earlier content compares, and the result does not match; Corresponding with sequence number 4 again content compares, and the result does not match yet; Again with (1,2) Dui Ying content compares, result's coupling, then the predetermined probabilities of formulating according to sequence number 1 and sequence number 2 is selected CDN service provider, suppose that the B of CDN service provider is selected, CDN flow quantity intelligent scheduling DNS sends to local dns with the domain name example.com.cdnb.com of the B of CDN service provider so, local dns continues to ask the DNS of the B of CDN service provider that this domain name is carried out domain name mapping again, the DNS of the B of CDN service provider sends to local dns with the IP address of correspondence, local dns sends to netizen's browser with the IP address of the B of CDN service provider, and netizen's browser is asked the content of corresponding website to the B of CDN service provider according to this IP address.
CDN flow quantity intelligent dispatching method disclosed by the invention is to set up an intelligent scheduling center between the website of existing CDN network architecture and operator.When the website of netizen's access operator, native system obtains the geographical position and the ISP of local dns, and selects the CDN service provider that is fit to according to preset rules according to this geographical position and ISP.For operator, the intelligent scheduling center makes operator can change existing C DN service provider flexibly, so that make operator obtain the more CDN service of dominance price ratio.
Embodiment two
See also shown in Figure 1ly, the embodiment of the invention provides a kind of CDN flow quantity intelligent dispatching method, and this method specifically comprises:
Step S1: the domain name mapping request that the subdomain name that receiving local domain name server DNS provides by website domain name authority DNS sends;
Step S2: the IP address that obtains described local dns according to the domain name analysis request;
Step S3: utilize described IP Address Recognition to go out the geographical position and the Internet Service Provider ISP of described local dns;
Step S4: according to described geographical position and ISP, according to preset rules chosen content distributing network CDN service provider;
Step S5: the domain name of selecteed described CDN service provider is sent to described local dns.
See also shown in Figure 3ly, in said method step S4, preset rules is automatic strategy, and the idiographic flow of policy selection CDN service provider is automatically:
Step S41: calculate the response delay between described local dns and the described CDN service provider;
Step S41: the CDN service provider that selects the numerical value minimum of corresponding described response delay.
From said method as can be seen, present embodiment with embodiment one unique different place is on step S4, embodiment one selects for use manual strategy to come to choose CDN service provider for the website, and present embodiment is to select for use automatic strategy to choose CDN service provider for the website in step S4, only describe the content different with embodiment one below, identical part sees also embodiment one and gets final product.
CDN flow quantity intelligent scheduling DNS gets access to the geographical position and the ISP of local dns, suppose that the geographical position is " Beijing ", and ISP is " UNICOM newly ", according to automatic policy selection content distributing network CDN service provider.
At first, calculate the response delay between CDN service provider and the local dns, suppose that the response delay of CDN service provider and local dns is as shown in table 3:
Table 3
| Sequence number | The region | ??ISP | Target | Response delay |
| ??1 | Beijing | New UNICOM | ??A | ??32ms |
| ??2 | Beijing | New UNICOM | ??B | ??12ms |
| ??... | ??... | ??... | ??... | ??... |
By last table as can be known, response delay between local dns and the A of CDN service provider is 32ms, response delay between local dns and the B of CDN service provider is 12ms, so the network state of the digital proof CDN B of service provider is better than A, therefore, CDN flow quantity intelligent scheduling DNS sends to local dns with the domain name of the B of CDN service provider, and following step is identical with embodiment one, does not give unnecessary details herein.
Embodiment two provides a kind of method of obtaining CDN service provider automatically for website operator, do not need to set in advance the selected probability of CDN service provider, and embodiment one provides a kind of method of manually obtaining CDN service provider for website operator, then need to set in advance the selected probability of CDN service provider, therefore, website operator can choose the suitable mode of choosing CDN service provider voluntarily according to the needs of oneself.
The invention also discloses a kind of CDN flow quantity intelligent dispatching device 1, see also shown in Figure 8ly, comprising: receiver module 11, acquisition module 12, identification module 13, processing module 14 and sending module 15; Described receiver module 11, the domain name mapping request that the subdomain name that being used to receive local dns 4 provides by website domain name authority DNS sends; Described acquisition module 12 is used for obtaining according to the domain name analysis request IP address of described local dns 4; Described identification module 13 is used to utilize described IP Address Recognition to go out the geographical position and the ISP of described local dns 4; Described processing module 14 is used for according to described geographical position and ISP, according to preset rules chosen content distributing network CDN service provider; Described sending module 15 is used for the domain name of selecteed described CDN service provider is sent to described local dns 4.
In above-mentioned processing module 14, processing module 14 comprises creating unit 141, matching unit 142 and selected cell 143; As shown in Figure 9, described creating unit 141 is used to set up the mapping table of described CDN service provider and described geographical position, ISP and selected probability; Described matching unit 142, be used at described mapping table, select the CDN service provider that geographical position and ISP with described local dns are complementary, described selected cell 143 according to default matching way, be used for according to described selected probability, select the described CDN service provider that is complementary.The device of present embodiment is used for choosing CDN service provider by manual strategy.
Another embodiment of the present invention then is to choose CDN service provider by automatic strategy, what they were different with the foregoing description is different in processing module 14, wherein, processing module 14 comprises computing unit 141 and selected cell 142, see also shown in Figure 10, described computing unit 141 is used to calculate the response delay between described local dns and the described CDN service provider; Described selected cell 142 is used to select the CDN service provider of the numerical value minimum of corresponding described response delay.
The invention also discloses a kind of CDN flow quantity intelligent dispatching patcher, see also shown in Figure 11ly, comprising: CDN flow quantity intelligent dispatching device 1, the DNS3 of CDN service provider and website domain name authority DNS2; Described website domain name authority DNS2 is used to receive the domain name mapping request of local dns 4, and the domain name of described CDN flow quantity intelligent dispatching device 1 is sent to described local dns 4; Described CDN flow quantity intelligent dispatching device 1 is used to receive the domain name mapping request of described local dns 4, selects CDN service provider according to preset rules, and the domain name of described CDN service provider is sent to described local dns 4; The described CDN DNS3 of service provider is used to receive the domain name mapping request of described local dns 4, and the IP address is sent to described local dns 4.
Need to prove; Fig. 1 extremely embodiment shown in Figure 11 is the preferred embodiment that the present invention introduces; those skilled in the art on this basis; can design more embodiment fully; therefore the present invention embodiment of being not limited to provide is conspicuous to the multiple modification of these embodiment to those skilled in the art, all is the scope of protection of the invention; because length is limited, does not give unnecessary details herein.
From technical scheme of the present invention as can be seen, CDN flow quantity intelligent dispatching method disclosed by the invention, device and system, be between the operator of existing CDN service provider and website, to set up an intelligent scheduling center, so that website operator can use a plurality of CDN service provider simultaneously, and can change CDN service provider flexibly, thereby avoid to use under the existing pattern drawback of a CDN service provider, even one in a plurality of CDN service provider that website operator uses goes wrong, can not cause the situation that the netizen can't access websites yet, because also have other CDN service provider that service can be provided, so just reduced the risk that breaks down in the website.Because the present invention can make operator use a plurality of CDN service provider, so in the time of need changing CDN service provider in website operator, do not need to consider the problem of the stability of website fully, because in the process of changing a tame CDN service provider, also have other CDN service provider working, so the situation that the netizen can't the website can not occur for website operator.When the website of netizen's access operator, the intelligent scheduling center obtains the geographical position and the ISP of local dns, and selects the CDN service provider that is fit to according to preset rules according to this geographical position and ISP.For the operator of website, the intelligent scheduling center makes operator can use the service of a plurality of CDN service provider simultaneously, and make operator can change existing C DN service provider flexibly, so that make operator obtain the more CDN service of dominance price ratio, bring better service for the netizen simultaneously.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For the disclosed device of embodiment, because it is corresponding with the embodiment disclosed method, so description is fairly simple, relevant part partly illustrates referring to method and gets final product.
It will be understood by those skilled in the art that and to use many different technologies and in the technology any one to come expression information, message and signal.For example, the message of mentioning in the above-mentioned explanation, information can be expressed as voltage, electric current, electromagnetic wave, magnetic field or magnetic particle, light field or above combination in any.
The professional can also further 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.
The method of describing in conjunction with embodiment disclosed herein or the step of algorithm can directly use the software module of hardware, processor execution, and perhaps the combination of the two is implemented.Software module can place the storage medium of any other form known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or the technical field.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (8)
1. a CDN flow quantity intelligent dispatching method is characterized in that, comprising:
The domain name mapping request that the subdomain name that receiving local domain name server DNS provides by website domain name authority DNS sends;
Obtain the IP address of described local dns according to the domain name analysis request;
Utilize described IP Address Recognition to go out the geographical position and the Internet Service Provider ISP of described local dns;
According to described geographical position and ISP, according to preset rules chosen content distributing network CDN service provider;
The domain name of selecteed described CDN service provider is sent to described local dns.
2. CDN flow quantity intelligent dispatching method according to claim 1 is characterized in that, described preset rules is manually tactful, and the idiographic flow of the described CDN of described manual policy selection service provider is:
Set up the mapping table of described CDN service provider and described geographical position, ISP and selected probability;
In described mapping table, select the CDN service provider that geographical position and ISP with described local dns are complementary according to default matching way;
According to described selected probability, select the described CDN service provider that is complementary.
3. CDN flow quantity intelligent dispatching method according to claim 2 is characterized in that, the particular content of selecting the CDN service provider that geographical position and ISP with described local dns be complementary according to default matching way is:
1), judges whether comprise all identical with the geographical position of described local dns described CDN service provider in the described mapping table) if then select described CDN service provider, if not, then enter step 2 with ISP;
2), judge identical and described CDN not specified geographic location the service provider of the ISP that whether comprises in the described mapping table with described local dns, if, then select described CDN service provider, if not, then enter step 3);
3), judge whether comprise described CDN identical with the geographical position of described local dns and not assigned I SP service provider in the described mapping table, if, then select described CDN service provider, if not, then enter step 4);
4), judge whether comprise specified geographic location not and the described CDN service provider of assigned I SP not in the described mapping table, if, then select described CDN service provider, if not, the default CDN service provider of selective system then.
4. CDN flow quantity intelligent dispatching method according to claim 1 is characterized in that, described preset rules is tactful automatically, and the idiographic flow of the described CDN of described automatic policy selection service provider is:
Calculate the response delay between described local dns and the described CDN service provider;
Select the CDN service provider of the numerical value minimum of corresponding described response delay.
5. a CDN flow quantity intelligent dispatching device is characterized in that, comprising: receiver module, acquisition module, identification module, processing module and sending module;
Described receiver module, the domain name mapping request that the subdomain name that being used to receive local domain name server DNS provides by website domain name authority DNS sends;
Described acquisition module is used for obtaining according to the domain name analysis request IP address of described local dns;
Described identification module is used to the geographical position and the Internet Service Provider ISP that utilize described IP Address Recognition to go out described local dns;
Described processing module is used for according to described geographical position and ISP, according to preset rules chosen content distributing network CDN service provider;
Described sending module is used for the domain name of selecteed described CDN service provider is sent to described local dns.
6. CDN flow quantity intelligent dispatching device according to claim 5 is characterized in that described processing module comprises creating unit, matching unit and selected cell;
Described creating unit is used to set up the mapping table of described CDN service provider and described geographical position, ISP and selected probability;
Described matching unit is used at described mapping table, selects the CDN service provider that geographical position and ISP with described local dns are complementary according to default matching way;
Described selected cell is used for according to described selected probability, selects the described CDN service provider that is complementary.
7. CDN flow quantity intelligent dispatching device according to claim 5 is characterized in that described processing module comprises computing unit and selected cell;
Described computing unit is used to calculate the response delay between described local dns and the described CDN service provider;
Described selected cell is used to select the CDN service provider of the numerical value minimum of corresponding described response delay.
8. a CDN flow quantity intelligent dispatching patcher is characterized in that, comprising: CDN flow quantity intelligent dispatching device, the DNS of CDN service provider and website domain name authority DNS;
Described website domain name authority DNS is used to receive the domain name mapping request of local dns, and the domain name of described CDN flow quantity intelligent dispatching device is sent to described local dns;
Described CDN flow quantity intelligent dispatching device is used to receive the domain name mapping request of described local dns, selects CDN service provider according to preset rules, and the domain name of described CDN service provider is sent to described local dns;
The described CDN DNS of service provider is used to receive the domain name mapping request of described local dns, and the IP address is sent to described local dns.
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| CN2009102440077A CN101764747B (en) | 2009-12-24 | 2009-12-24 | Intelligent dispatching method, device and system of content delivery network flow |
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| CN2009102440077A CN101764747B (en) | 2009-12-24 | 2009-12-24 | Intelligent dispatching method, device and system of content delivery network flow |
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