CN105491173A - DNS analysis method, server and network system - Google Patents
DNS analysis method, server and network system Download PDFInfo
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Abstract
The invention discloses a DNS analysis method, a server and a network system. The DNS analysis method includes the following steps of: acquiring IP addresses of a plurality of resource servers of a target domain name; calculating the distances between the IP addresses of the plurality of resource servers and a network service provision point where a user is located, and sequencing the IP addresses of the plurality of resource servers according to the distances from near to far; and sending a sequenced optimized result of the IP addresses of the plurality of resource servers to the user. According to the DNS analysis method, the server and the network system, the distance between the POP point where the user is located and each website can be calculated based on a hop count strategy, an in-network preference strategy, and a transmission delay strategy; and the sequenced optimized domain name analysis result is provided to the user to be accessed, so that the user can always access the nearest network resource, the network bandwidth can be saved to the greatest extent, and the service experience of the user in internet content resource access can be improved.
Description
Technical field
The present invention relates to Internet technical field, particularly relate to a kind of dns resolution method, server and network system.
Background technology
ICP ICP provides content resource to user usually in a distributed way, and the resource of client's request may be positioned at different carrier networks, or is positioned at the different geographical of same carrier network.When user carries out domain name mapping request to access some websites resource, dns server may respond the IP address of multiple resource, and user gives tacit consent to use first IP address and conducts interviews, but this is not necessarily from the access resources that user is nearest.The corresponding resource in first IP address that local dns server returns to user may be crossed over different operators network or cross over local network.When local dns server receives the domain name mapping request of user, local dns server is just transmitted to user the domain name mapping result that recursive query obtains simply, as shown in Figure 1, local dns server may rank the first IDC4 (cross operator) web IP address and issue user (IDC4, IDC2, IDC3, IDC1), user gives tacit consent to access website farthest, use first IP address, affects user awareness.Because local dns server is just transmitted to user the domain name mapping result that recursive query obtains simply, there is non-optimal and resolve, cause inter-network or flow is large, Consumer's Experience is bad transprovincially.
Summary of the invention
In view of this, the technical problem that the present invention will solve is to provide a kind of dns resolution method, can optimize the analysis result to target domain name.
A kind of dns resolution method, comprising: the IP address obtaining multiple Resource Servers of target domain name; The network service of the IP address and user place that calculate described multiple Resource Server provides distance a little, and according to distance order from the near to the remote to the IP address sort of described multiple Resource Server; The sorting consistence result of the IP address of described multiple Resource Server is sent to described user.
According to one embodiment of present invention, further, the dns resolution request of the described target domain name of appointment that described user sends is received; From described dns resolution acquisition request IP address, the network service of described IP address belonging to described user provides a distribution; There is provided IP network sector address a little to mate described IP address and each pre-configured network service, determine that the network service belonging to described user provides a little.
According to one embodiment of present invention, further, calculate the IP address network service arrived belonging to described user of described multiple Resource Server according to network topology database and jumping figure is a little provided; According to the minimum principle of jumping figure, the access order of the IP address of described multiple Resource Server is sorted, ranking results is returned to described user and stores.
According to one embodiment of present invention, further, calculate the IP address network service arrived belonging to described user of described multiple Resource Server according to network topology database and jumping figure is a little provided; According to priority principle in net, the access order of the IP address with the Resource Server of described user in same carrier network is stood out, and, according to the minimum principle of jumping figure, the access order of the IP address of the Resource Server in same carrier network or different operators network is sorted, ranking results is returned to described user and stores.
According to one embodiment of present invention, further, calculate the IP address network service arrived belonging to described user of described multiple Resource Server according to network topology database and transmission delay is a little provided; According to the shortest principle of transmission delay, the access order of the IP address of described multiple Resource Server is sorted, ranking results is returned to described user and stores.
According to one embodiment of present invention, further, described user receives described ranking results, according to the availability access resources server successively of Resource Server in described ranking results.
According to one embodiment of present invention, further, belong to that described network service provides that user a little sends when receiving, dns resolution request to described target domain name time, the described ranking results stored is returned to this user.
The technical problem that the present invention will solve is to provide a kind of dns server, can optimize the analysis result to target domain name.
A kind of dns server, comprising: address acquisition unit, for obtaining the IP address of multiple Resource Servers of target domain name; Metrics calculation unit, the network service for the IP address and user place that calculate described multiple Resource Server provides distance a little; Address sort unit, for according to distance order from the near to the remote to the IP address sort of described multiple Resource Server; Address returns unit, and the sorting consistence result for the IP address by described multiple Resource Server sends to described user.
According to one embodiment of present invention, further, also comprise: request reception unit, for receiving the dns resolution request of the described target domain name of appointment that described user sends; POP point acquiring unit, for from described dns resolution acquisition request IP address, provides IP network sector address a little to mate described IP address and each pre-configured network service, determines that the network service belonging to described user provides a little; Wherein, the network service of described IP address belonging to described user provides a distribution.
According to one embodiment of present invention, further, described metrics calculation unit, the network service also for arriving described user place according to the IP address of the described multiple Resource Server of network topology database calculating provides jumping figure a little; Also comprise address sort unit, for sorting according to the access order of the minimum principle of jumping figure to the IP address of described multiple Resource Server, and memory sequencing result.
According to one embodiment of present invention, further, described metrics calculation unit, the network service also for arriving described user place according to the IP address of the described multiple Resource Server of network topology database calculating provides jumping figure a little; Described address sort unit, also for according to net in priority principle, the access order of the IP address with the Resource Server of described user in same carrier network is stood out, and, according to the minimum principle of jumping figure, the access order of the IP address of the Resource Server in same carrier network or different operators network is sorted, and memory sequencing result.
According to one embodiment of present invention, further, described metrics calculation unit, the network service also for arriving described user place according to the IP address of the described multiple Resource Server of network topology database calculating provides transmission delay a little; Described address sort unit, for according to the shortest principle of transmission delay, sorts the access order of the IP address of described multiple Resource Server, and memory sequencing result.
According to one embodiment of present invention, further, described address returns unit, also for belonging to that described network service provides that user a little sends when receiving, dns resolution request to described target domain name time, the described ranking results stored is returned to this user.
A kind of network system, comprising: dns server as above.
Dns resolution method of the present invention, server and network system, calculate the distance of each website and user place POP point, can based on strategies such as preferential in jumping figure, net, transmission delays, the site resource selecting distance users nearest is supplied to user's access, the network bandwidth can be saved to greatest extent, improve the business experience that user accesses Internet content sources.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of domain name mapping result of the prior art;
Fig. 2 is the flow chart of an embodiment according to dns resolution method of the present invention;
Fig. 3 is the synchronous schematic diagram of network topology database of an embodiment according to dns resolution method of the present invention;
Fig. 4 is the IP network sector address schematic diagram of each POP point of the acquisition of an embodiment according to dns resolution method of the present invention;
Fig. 5 is the domain name mapping result schematic diagram through analytical optimization of the buffer memory of an embodiment according to dns resolution method of the present invention;
Fig. 6 is the domain name mapping optimum results schematic diagram of an embodiment according to dns resolution method of the present invention;
Fig. 7 is the domain name mapping optimum results schematic diagram of another embodiment according to dns resolution method of the present invention;
Fig. 8 is the domain name mapping optimum results schematic diagram of another embodiment according to dns resolution method of the present invention;
Fig. 9 is the structural representation of an embodiment according to dns server of the present invention.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention is wherein described.Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.Below in conjunction with each figure and embodiment, many-sided description is carried out to technical scheme of the present invention.
Fig. 2 is the flow chart of an embodiment according to dns resolution method of the present invention, as shown in Figure 2:
Step 101, obtains the IP address of multiple Resource Servers of target domain name.
Step 102, the network service of the IP address and user place that calculate multiple Resource Server provides distance a little.
Step 103, provides the IP address of a little nearest Resource Server to send to user by the network service with user place.
In one embodiment, can only send the IP address that a little nearest Resource Server is provided with the network service at user place, also can sort to the IP address of multiple Resource Server, generate the ranking results optimized, according to the rule of subscribing, thered is provided by network service with user place the IP address of a little nearest Resource Server to come, user can preferentially use.
Dns resolution method of the present invention, calculate the distance that each website and user place network service provide point (or claiming local side) POP point, the site resource selecting distance users nearest is supplied to user's access, the network bandwidth can be saved to greatest extent, and best business experience can be provided for user.
In one embodiment, receive the dns resolution request of the intended target domain name that user sends, from dns resolution acquisition request IP address, the network service of IP address belonging to user provides a distribution.There is provided IP network sector address a little to mate IP address and each network service, determine that the network service belonging to user provides a little.
In one embodiment, topological database Network Based carries out dns resolution, and local dns server topological database Network Based calculates the distance of each website and user place POP point, and the site resource selecting distance users nearest is supplied to user's access.Local dns server can obtain the whole network network topology database data by the IP network pipe of operator or internet core router.
As shown in Figure 3, when the whole network network topology changes, IP network pipe or internet core router upgrade network topology database data, simultaneously to local dns server synchronized update the whole network network topology database data.Now, the network topology database data that local dns server obtains can reflect full mesh topology in real time.
IP address is generally distributed by place POP point, and local dns server needs the IP network sector address obtaining each POP point in its service range.As shown in Figure 4, the corresponding IP network section 11 of POP1, IP network section 12, The corresponding IP network section 21 of POP2, IP network section 22, The corresponding IP network section 31 of POP3, IP network section 32, The corresponding IP network section 41 of POP4, IP network section 42, The corresponding IP network section 51 of POP5, IP network section 52 ... etc..
When user sends the dns resolution request of certain designated domain name to local dns server, local dns server obtains the IP address of user from user domain name analysis request message, and mate with the IP network sector address of each POP point, obtain the POP point belonging to user according to matching result.
Local dns server, through DNS recursive query, may obtain the IP address of multiple Resource Server.ICP can at same carrier network zones of different or different operators network design content resource server, ICP authorized DNS server can return to local dns server Servers-all IP address corresponding for user access resources domain name, and local dns server can reply IP address corresponding to domain name that recursive query obtains to user indiscriminately.
In one embodiment, local dns server sorts based on calculating these IP addresses respectively to the distance of user place POP point based on strategies such as preferential in jumping figure, net, transmission delays, and optimum results is deposited in the buffer.As shown in Figure 5, for resolved domain name 1, the analytical optimization result of corresponding POP1 is IP1, IP2, IP3, IP4, IP5; Analytical optimization result for POP2 is IP2, IP1, IP3, IP4, IP5; Analytical optimization result for POP3 is IP3, IP1, IP2, IP4, IP5; The analytical optimization result of POP4 is IP4, IP1, IP2, IP3, IP5; Analytical optimization result for POP5 is IP5, IP1, IP2, IP3, IP4.The dns resolution result of optimization is returned through to user.User always accesses optimum site resource.If the site resource non-availability of optimum, accesses the site resource of suboptimum successively.
In one embodiment, the IP address network service arrived belonging to user calculating multiple Resource Server according to network topology database provides jumping figure a little.According to the minimum principle of jumping figure, the access order of the IP address of multiple Resource Server is sorted, ranking results is returned to user and stores.
In one embodiment, as shown in Figure 6, local dns server obtains the IP address of four websites from data center IDC1, IDC2, IDC3, IDC4 by recursive query.Local dns server calculates the jumping figure of these 4 IP addresses to user place POP according to network topology database.Such as, according to real network topological database, using the router of POP point connection as root node, according to dijkstra's algorithm, calculate the jumping figure of root node to domain name each server ip address corresponding, obtain the server ip address that the path of a fewest number of hops is corresponding.
POP point have passed through 4 hop routers to IDC1, and POP point have passed through 5 hop routers to IDC2, and POP point have passed through 6 hop routers to IDC3, and POP point have passed through 7 hop routers to IDC4.
According to the minimum principle of jumping figure, local dns server sorts to POP point jumping figure is ascending according to the IP address of these four websites, and ranking results is Dip1<Dip2<Dip3<Di p4.Local dns server is deposited optimum results in the buffer, returns dns resolution optimum results to user simultaneously.User gives tacit consent to use parsing and obtains first ip1 access websites resource corresponding to domain name.If ip1 is unreachable, use the site resource that ip2, ip3, ip4 are corresponding successively.
In one embodiment, the IP address network service arrived belonging to user calculating multiple Resource Server according to network topology database provides jumping figure a little.According to priority principle in net, the access order of the IP address with the Resource Server of user in same carrier network is stood out, and, according to the minimum principle of jumping figure, the access order of the IP address of the Resource Server in same carrier network or different operators network is sorted, ranking results is returned to user and stores.
In one embodiment, as shown in Figure 7, local dns server obtains the IP address of four websites from data center IDC1, IDC2, IDC3, IDC4 by recursive query.Local dns server calculates the jumping figure of these 4 IP addresses to user place POP according to network topology database.POP point have passed through 5 hop routers to IDC1, and POP point have passed through 6 hop routers to IDC2, and POP point have passed through 7 hop routers to IDC3, and POP point have passed through 4 hop routers to IDC4.
Because IDC4 is positioned at cross operator network, although the jumping figure that IDC4 to POP puts process is minimum, according to priority principle in net, the priority of local dns server to the IP address of these four websites sorts, and ranking results is Dip1<Dip2<Dip3<Di p4.Local dns server is deposited optimum results in the buffer, returns dns resolution optimum results to user simultaneously.User gives tacit consent to use parsing and obtains ip1 access websites resource corresponding to domain name.If ip1 is unreachable, use the site resource that ip2, ip3, ip4 are corresponding successively.
In one embodiment, the IP address network service arrived belonging to user calculating multiple Resource Server according to network topology database provides transmission delay a little.According to the shortest principle of transmission delay, the access order of the IP address of multiple Resource Server is sorted, ranking results is returned to user and stores.
In one embodiment, as shown in Figure 8, suppose that local dns server obtains the IP address of four websites from data center IDC1, IDC2, IDC3, IDC4 by recursive query.Local dns server calculates the transmission delay of these 4 IP addresses to user place POP according to network topology database.Such as, according to real network topological database, using the router of POP point connection as root node, according to dijkstra's algorithm, calculate the delay of root node to domain name each server ip address corresponding, obtain one and postpone server ip address corresponding to minimum path.
POP point have passed through 500 milliseconds to IDC1, and POP point have passed through 600 milliseconds to IDC2, and POP point have passed through 700 milliseconds to IDC3, and POP point have passed through 800 milliseconds to IDC4.According to the shortest principle of transmission delay, the priority of local dns server to the IP address of these four websites sorts, and ranking results is Dip1<Dip2<Dip3<Di p4.Local dns server is deposited optimum results in the buffer, returns dns resolution optimum results to user simultaneously.User gives tacit consent to use parsing and obtains ip1 access websites resource corresponding to domain name.If ip1 is unreachable, use the site resource that ip2, ip3, ip4 are corresponding successively.
In one embodiment, user receives ranking results, according to the sequence access resources server successively of the IP address of Resource Server in ranking results.Belong to that network service provides that user a little sends when receiving, dns resolution request to target domain name time, the ranking results of storage is returned to this user.Such as, when the user that the next one belongs to same POP point sends the dns resolution request of above-mentioned domain name again, local dns server is directly searched and is deposited existing domain name mapping optimum results in the buffer, returns to user, without the need to again for this user recalculates optimum results.
As shown in Figure 9, the invention provides a kind of dns server 4, comprising: address acquisition unit 41, metrics calculation unit 42, address return unit 43, request reception unit 44, POP point acquiring unit 45 and address sort unit 46.
Address acquisition unit 41 obtains the IP address of multiple Resource Servers of target domain name.The network service of IP address and user place that metrics calculation unit 42 calculates multiple Resource Server provides distance a little.Address sort unit 46 according to distance order from the near to the remote to the IP address sort of described multiple Resource Server.Address returns unit 43 provides the IP address of a little nearest Resource Server to send to user by the network service with user place.
In one embodiment, request reception unit 44 receives the dns resolution request of the intended target domain name that user sends.IP address and each network service, from dns resolution acquisition request IP address, provide IP network sector address a little to mate, determine that the network service belonging to user provides a little by POP point acquiring unit 45.The network service of IP address belonging to user provides a distribution.
In one embodiment, metrics calculation unit 42 arrives the network service at user place according to the IP address that network topology database calculates multiple Resource Server and provides jumping figure a little.Address sort unit 46 sorts according to the access order of the minimum principle of jumping figure to the IP address of multiple Resource Server, and memory sequencing result.
In one embodiment, metrics calculation unit 42 arrives the network service at user place according to the IP address that network topology database calculates multiple Resource Server and provides jumping figure a little.Address sort unit 46 is according to priority principle in net, the access order of the IP address with the Resource Server of user in same carrier network is stood out, and, according to the minimum principle of jumping figure, the access order of the IP address of the Resource Server in same carrier network or different operators network is sorted, and memory sequencing result.
In one embodiment, metrics calculation unit 42 arrives the network service at user place according to the IP address that network topology database calculates multiple Resource Server and provides transmission delay a little.The access order of the IP address of multiple Resource Server, according to the shortest principle of transmission delay, sorts by address sort unit 46, and memory sequencing result.
In one embodiment, belong to that network service provides that user a little sends when receiving, dns resolution request to target domain name time, address returns unit 43 and the ranking results of storage is returned to this user.
In one embodiment, a kind of network system, comprises dns server as above.
By dns resolution method of the present invention provided by the invention, server and network system, topological database Network Based calculates the distance of each website and user place POP point, can based on strategies such as preferential in jumping figure, net, transmission delays, the site resource selecting distance users nearest is supplied to user's access, the network bandwidth can be saved to greatest extent, improve the business experience that user accesses Internet content sources, solve the limitation of prior art.
Method and system of the present invention may be realized in many ways.Such as, any combination by software, hardware, firmware or software, hardware, firmware realizes method and system of the present invention.Said sequence for the step of method is only to be described, and the step of method of the present invention is not limited to above specifically described order, unless specifically stated otherwise.In addition, in certain embodiments, can be also record program in the recording medium by the invention process, these programs comprise the machine readable instructions for realizing according to method of the present invention.Thus, the present invention also covers the recording medium stored for performing the program according to method of the present invention.
Description of the invention provides in order to example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.
Claims (14)
1. a domain name system DNS analytic method, is characterized in that, comprising:
Obtain the IP address of multiple Resource Servers of target domain name;
The network service of the IP address and user place that calculate described multiple Resource Server provides distance a little, and according to distance order from the near to the remote to the IP address sort of described multiple Resource Server;
The sorting consistence result of the IP address of described multiple Resource Server is sent to described user.
2. the method for claim 1, is characterized in that:
Receive the dns resolution request of the described target domain name of appointment that described user sends;
From described dns resolution acquisition request IP address, the network service of described IP address belonging to described user provides a distribution;
There is provided IP network sector address a little to mate described IP address and each pre-configured network service, determine that the network service belonging to described user provides a little.
3. method as claimed in claim 2, is characterized in that:
Calculate the IP address network service arrived belonging to described user of described multiple Resource Server according to network topology database and jumping figure is a little provided;
According to the minimum principle of jumping figure, the access order of the IP address of described multiple Resource Server is sorted, ranking results is returned to described user and stores.
4., as right wants the method as described in 2, it is characterized in that:
Calculate the IP address network service arrived belonging to described user of described multiple Resource Server according to network topology database and jumping figure is a little provided;
According to priority principle in net, the access order of the IP address with the Resource Server of described user in same carrier network is stood out, and, according to the minimum principle of jumping figure, the access order of the IP address of the Resource Server in same carrier network or different operators network is sorted, ranking results is returned to described user and stores.
5. method as claimed in claim 2, is characterized in that:
Calculate the IP address network service arrived belonging to described user of described multiple Resource Server according to network topology database and transmission delay is a little provided;
According to the shortest principle of transmission delay, the access order of the IP address of described multiple Resource Server is sorted, ranking results is returned to described user and stores.
6. the method as described in claim 3 or 4 or 5, is characterized in that:
Described user receives described ranking results, according to the availability of Resource Server in described ranking results, successively access resources server.
7. the method as described in claim 3 or 4 or 5, is characterized in that:
Belong to that described network service provides that user a little sends when receiving, dns resolution request to described target domain name time, the described ranking results stored is returned to this user.
8. a domain name system DNS server, is characterized in that, comprising:
Address acquisition unit, for obtaining the IP address of multiple Resource Servers of target domain name;
Metrics calculation unit, the network service for the IP address and user place that calculate described multiple Resource Server provides distance a little;
Address sort unit, for according to distance order from the near to the remote to the IP address sort of described multiple Resource Server;
Address returns unit, and the sorting consistence result for the IP address by described multiple Resource Server sends to described user.
9. server as claimed in claim 8, is characterized in that, also comprise:
Request reception unit, for receiving the dns resolution request of the described target domain name of appointment that described user sends;
POP point acquiring unit, for from described dns resolution acquisition request IP address, provides IP network sector address a little to mate described IP address and each pre-configured network service, determines that the network service belonging to described user provides a little; Wherein, the network service of described IP address belonging to described user provides a distribution.
10. server as claimed in claim 9, is characterized in that:
Described metrics calculation unit, the network service also for arriving described user place according to the IP address of the described multiple Resource Server of network topology database calculating provides jumping figure a little;
Described address sort unit, for sorting according to the access order of the minimum principle of jumping figure to the IP address of described multiple Resource Server, and memory sequencing result.
11. want the server as described in 9 as right, it is characterized in that:
Described metrics calculation unit, the network service also for arriving described user place according to the IP address of the described multiple Resource Server of network topology database calculating provides jumping figure a little;
Described address sort unit, also for according to net in priority principle, the access order of the IP address with the Resource Server of described user in same carrier network is stood out, and, according to the minimum principle of jumping figure, the access order of the IP address of the Resource Server in same carrier network or different operators network is sorted, and memory sequencing result.
12. servers as claimed in claim 9, is characterized in that:
Described metrics calculation unit, the network service also for arriving described user place according to the IP address of the described multiple Resource Server of network topology database calculating provides transmission delay a little;
Described address sort unit, for according to the shortest principle of transmission delay, sorts the access order of the IP address of described multiple Resource Server, and memory sequencing result.
13. servers as described in claim 10 or 11 or 12, is characterized in that:
Described address returns unit, also for belonging to that described network service provides that user a little sends when receiving, dns resolution request to described target domain name time, the described ranking results stored is returned to this user.
14. 1 kinds of network systems, is characterized in that, comprising:
Dns server as described in claim 8 to 13 any one.
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| CN108989487A (en) * | 2018-09-06 | 2018-12-11 | 北京泰策科技有限公司 | CDN Optimization Scheduling based on local dns |
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| CN102025793A (en) * | 2010-01-22 | 2011-04-20 | 中国移动通信集团北京有限公司 | Domain name resolution method and system and DNS in IP network |
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| CN112910718A (en) * | 2021-03-17 | 2021-06-04 | 中国电子信息产业集团有限公司第六研究所 | Network space mapping method based on DNS system |
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