CN102137174B - Method for caching of domain name system, authorized domain name server and cache domain name server - Google Patents

Method for caching of domain name system, authorized domain name server and cache domain name server Download PDF

Info

Publication number
CN102137174B
CN102137174B CN201010612278.6A CN201010612278A CN102137174B CN 102137174 B CN102137174 B CN 102137174B CN 201010612278 A CN201010612278 A CN 201010612278A CN 102137174 B CN102137174 B CN 102137174B
Authority
CN
China
Prior art keywords
domain name
result
name mapping
request
buffer memory
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201010612278.6A
Other languages
Chinese (zh)
Other versions
CN102137174A (en
Inventor
张德文
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HUIZHOU ZHITAI ENTERPRISE MANAGEMENT CO.,LTD.
Nantong Tianyuan Gas Co ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN201010612278.6A priority Critical patent/CN102137174B/en
Publication of CN102137174A publication Critical patent/CN102137174A/en
Priority to PCT/CN2011/083913 priority patent/WO2012089013A1/en
Application granted granted Critical
Publication of CN102137174B publication Critical patent/CN102137174B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
    • H04L43/0817—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking functioning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/16—Threshold monitoring
    • 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]
    • 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
    • H04L61/58—Caching of addresses or names

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The invention discloses a method for updating the caching of a domain name system, an authorized domain name server and a cache domain name server. The method comprises the steps that when a content server corresponding to a first domain name resolution result in the cache of the system is detected to be out of order or exceed a threshold value on load, a second domain name resolution result of adomain name required to be analyzed is acquired, the domain name required to be analyzed corresponds to the first domain name resolution result, and the working state of the content server corresponding to a second domain name resolution result is normal; and domain name resolution updating information is sent to the cache domain name server corresponding to the domain name requiring to be analyzed, carries the domain name requiring to be analyzed, and is used for indicating the cache domain name server to update the first domain name resolution result to the second domain name resolution result. In the embodiment of the invention, the cache domain name server can return a right domain name resolution result to a terminal, and then the terminal requests contents to the content server in normal working state according to the domain name resolution result.

Description

The method of domain name system buffer memory, authoritative domain name server, caching nameserver
Technical field
The present invention relates to areas of information technology, be specifically related to a kind of method, authoritative domain name server and caching nameserver that upgrades the domain name system buffer memory.
Background technology
(Domain Name System DNS) is a distributed host information database to domain name system, adopts Client, and it mainly comprises caching nameserver and authoritative domain name server.Wherein, authoritative domain name server is preserved domain name and Internet protocol (Internet Protocol, IP) corresponding relation between the address in this network.Authoritative domain name server can be corresponding IP address with domain name mapping.
In existing domain name mapping process, terminal sends domain name mapping request, the domain name of carried terminal request analysis in this domain name mapping request to caching nameserver.Caching nameserver sends the domain name mapping request to authoritative domain name server.Authoritative domain name server is carried out domain name mapping according to the domain name mapping request, obtain the domain name mapping result, and to caching nameserver transmission domain name mapping response, comprise the domain name mapping result in this domain name mapping response, comprise among the domain name mapping result IP address of content server and the life span of analysis result (Time To Live, TTL).Caching nameserver sends the domain name mapping result to terminal.
Wherein, caching nameserver is after receiving the domain name mapping response, come buffer memory domain name mapping result according to life span, after the domain name mapping request that the domain name at same that receives the terminal transmission is resolved, directly the domain name mapping result with buffer memory sends to terminal.After TTL was overtime, caching nameserver was deleted this domain name mapping result from buffer memory.
Before TTL is overtime, if the content server fault of domain name correspondence in the domain name analysis result, caching nameserver still can return the address of the content server of fault based on the domain name mapping request, cause terminal according to this domain name mapping result during to the content server request content of fault, the content requests failure.
Summary of the invention
The embodiment of the invention provides a kind of method of upgrading the domain name system buffer memory and authoritative domain name server, caching nameserver, with after the content server fault, domain name mapping result on deletion in time self caching nameserver avoids terminal to send request to the content server of fault.
For solving the problems of the technologies described above, the embodiment of the invention is achieved through the following technical solutions:
The method of the renewal domain name system buffer memory that the embodiment of the invention provides comprises:
First domain name mapping in detecting self buffer memory is when the content server of correspondence breaks down or load above threshold value as a result, obtain the second domain name mapping result of the domain name of request analysis, the domain name that described request is resolved and described first domain name mapping be correspondence as a result, and described second domain name mapping operating state of the content server of correspondence as a result is normal;
The domain name corresponding cache name server of resolving to described request sends the domain name mapping updating message, domain name is resolved and to be carried the domain name that described request is resolved in the updating message, and domain name is resolved updating message and is used to indicate described caching nameserver the first domain name mapping result of buffer memory is updated to the described second domain name mapping result.
The embodiment of the invention also provides a kind of method of upgrading the domain name system buffer memory, comprising:
First domain name mapping in detecting self buffer memory is when the content server of correspondence breaks down or load above threshold value as a result, generate the domain name mapping result and delete message, domain name analysis result deletion message is used for the first domain name mapping result of deletion caching nameserver, carry the domain name of request analysis in the domain name analysis result deletion message, the domain name that described request is resolved and described first domain name mapping be correspondence as a result;
Send domain name analysis result deletion message to described caching nameserver, so that the first domain name mapping result in described caching nameserver deletion self buffer memory, the domain name correspondence that described caching nameserver and described request are resolved.
The embodiment of the invention also provides a kind of method of upgrading the domain name system buffer memory, comprising:
Receive the domain name mapping updating message that authoritative domain name server sends, domain name is resolved updating message and is used to indicate caching nameserver the first domain name mapping result of buffer memory is updated to the described second domain name mapping result, and domain name is resolved the domain name of carrying request analysis in the updating message;
The first domain name mapping result in self buffer memory is updated to the described second domain name mapping result, the domain name correspondence that the described first domain name mapping result and described request are resolved.
The embodiment of the invention also provides a kind of method of upgrading the domain name system buffer memory, comprising:
The domain name mapping result who receives the authoritative domain name server transmission deletes message, carry the domain name of request analysis in the domain name analysis result deletion message, domain name analysis result deletion message is used for the first domain name mapping result that the deletion caching nameserver carries, the domain name correspondence that the described first domain name mapping result and described request are resolved;
Delete the first corresponding domain name mapping result of domain name who resolves with described request in self buffer memory.
The embodiment of the invention also provides a kind of authoritative domain name server, comprising:
The analysis result acquiring unit, be used in first domain name mapping that detects self buffer memory when the content server of correspondence breaks down or load above threshold value as a result, obtain the second domain name mapping result of the domain name of request analysis, the domain name that described request is resolved and described first domain name mapping be correspondence as a result, and described second domain name mapping operating state of the content server of correspondence as a result is normal;
The updating message transmitting element, be used for sending the domain name mapping updating message to the domain name corresponding cache name server that described request is resolved, domain name is resolved and to be carried the domain name that described request is resolved in the updating message, and domain name is resolved updating message and is used to indicate described caching nameserver the first domain name mapping result of buffer memory is updated to the described second domain name mapping result.
The embodiment of the invention also provides a kind of authoritative domain name server, comprises
The deletion message generation unit, be used in first domain name mapping that detects self buffer memory when the content server of correspondence breaks down or load above threshold value as a result, generate the domain name mapping result and delete message, domain name analysis result deletion message is used for the first domain name mapping result that the deletion caching nameserver carries, carry the domain name of request analysis in the domain name analysis result deletion message, the domain name of request analysis and described first domain name mapping be correspondence as a result;
The deletion message sending unit, be used for sending domain name analysis result deletion message to described caching nameserver, so that the first domain name mapping result in described caching nameserver deletion self buffer memory, the domain name correspondence that described caching nameserver and described request are resolved.
The embodiment of the invention also provides a kind of caching nameserver, comprising:
The updating message receiving element, be used for receiving the domain name mapping updating message that authoritative domain name server sends, domain name is resolved updating message and is used to indicate caching nameserver the first domain name mapping result of buffer memory is updated to the described second domain name mapping result, and domain name is resolved the domain name of carrying request analysis in the updating message;
Second updating block is used for the first domain name mapping result of self buffer memory being updated to the described second domain name mapping result, the domain name correspondence that the described first domain name mapping result and described request are resolved.
The embodiment of the invention also provides a kind of caching nameserver, comprising:
Deletion message sink unit, the domain name mapping result who is used for the transmission of reception authoritative domain name server deletes message, carry the domain name of request analysis in the domain name analysis result deletion message, domain name analysis result deletion message is used for the first domain name mapping result that the deletion caching nameserver carries, the domain name correspondence that the described first domain name mapping result and described request are resolved;
The deletion performance element is used for deletion self the buffer memory first domain name mapping result corresponding with the domain name of described request parsing.
The method of the renewal domain name system buffer memory that the embodiment of the invention provides can be applied in first domain name mapping as a result the content server of correspondence break down or load in the scene above threshold value, the embodiment of the invention is by sending the domain name mapping updating message to caching nameserver, make that the first domain name mapping result of caching nameserver deletion self buffer memory is the first domain name mapping result of the second domain name mapping result or deletion buffer memory, avoid returning the first wrong domain name mapping result to terminal.The embodiment of the invention can so that caching nameserver after the domain name mapping request that receives terminal subsequently, return the second domain name mapping result to terminal, and second domain name mapping content server operating state of correspondence is normal as a result, terminal can be to the normal content server request content of operating state.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, to do to introduce simply to the accompanying drawing of required use among prior art and the embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of the method for the renewal domain name system buffer memory that provides of the embodiment of the invention one;
Fig. 2 is the method flow diagram that authoritative domain name server sends the domain name mapping updating message in the embodiment of the invention one to the domain name corresponding cache name server of request analysis;
Fig. 3 is the flow chart of the method for the renewal domain name system buffer memory that provides of the embodiment of the invention two;
Fig. 4 is the flow chart of the method for the renewal domain name system buffer memory that provides of the embodiment of the invention three;
Fig. 5 is that authoritative domain name server is deleted the method flow diagram of message in execution to caching nameserver transmission domain name mapping result in the embodiment of the invention three;
Fig. 6 is the method flow diagram of the renewal domain name system buffer memory that provides of the embodiment of the invention four;
Fig. 7 is the flow chart of the method for the renewal domain name system buffer memory that provides of the embodiment of the invention five;
Fig. 8 is the flow chart that caching nameserver is updated to the first domain name mapping result in self buffer memory the second domain name mapping result in the embodiment of the invention five;
Fig. 9 is the flow chart of the method for the renewal domain name system buffer memory that provides of the embodiment of the invention six;
Figure 10 is the first domain name mapping result's corresponding with the domain name of request analysis method flow diagram in caching nameserver deletion self buffer memory in the embodiment of the invention six;
Figure 11 is the application scenarios figure of the method for the renewal domain name system buffer memory that provides of the embodiment of the invention seven;
Figure 12 is the structural representation of the authoritative domain name server that provides of the embodiment of the invention eight;
Figure 13 is the structural representation of the authoritative domain name server that provides of the embodiment of the invention nine;
Figure 14 is the structural representation of updating message transmitting element in the authoritative domain name server that provides of the embodiment of the invention nine;
Figure 15 is the structural representation of the authoritative domain name server that provides of the embodiment of the invention ten;
Figure 16 is the structural representation of deletion message sending unit in the authoritative domain name server that provides of the embodiment of the invention ten;
Figure 17 is the structural representation of the authoritative domain name server that provides of the embodiment of the invention 11;
Figure 18 is the structural representation of the caching nameserver that provides of the embodiment of the invention 12;
Figure 19 is the structural representation of second updating block in the caching nameserver that provides of the embodiment of the invention 12;
Figure 20 is the structural representation of the caching nameserver that provides of the embodiment of the invention 13;
Figure 21 is the structural representation of deletion performance element in the caching nameserver that provides of the embodiment of the invention 13.
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 obtains under the creative work prerequisite.
The invention provides a kind of method, authoritative domain name server and caching nameserver that upgrades the domain name system buffer memory.Technical scheme for a better understanding of the present invention describes in detail embodiment provided by the invention below in conjunction with accompanying drawing.
Referring to Fig. 1, Fig. 1 is the method flow diagram of the renewal domain name system buffer memory that provides of the embodiment of the invention one.
The method of the renewal domain name system buffer memory that the embodiment of the invention one provides comprises:
A1, first domain name mapping in detecting self buffer memory are when the content server of correspondence breaks down or load above threshold value as a result, obtain the second domain name mapping result of the domain name of request analysis, the domain name of this request analysis and first domain name mapping be correspondence as a result, and second domain name mapping operating state of the content server of correspondence as a result is normal.
Concrete, be cached with the first domain name mapping result in the authoritative domain name server, authoritative domain name server detect first domain name mapping as a result the content server of correspondence break down or load when surpassing threshold value, obtain the second domain name mapping result of the domain name of request analysis.
Wherein, the domain name of request analysis and first domain name mapping be correspondence as a result, and second domain name mapping operating state of the content server of correspondence as a result is normal.Wherein, the operating state of content server can be understood as normally that content server is current not to break down, and can provide content service for user terminal normally.In addition, the thresholding of the load of content server can be determined flexibly according to actual conditions.
A2, send the domain name mapping updating message to the domain name corresponding cache name server of request analysis, carry the domain name of above-mentioned request analysis in the domain name mapping updating message, this domain name mapping updating message is used to indicate caching nameserver the first domain name mapping result of buffer memory is updated to the second domain name mapping result.
Concrete, authoritative domain name server is after obtaining the second domain name mapping result, to the domain name corresponding cache name server transmission domain name mapping updating message of request analysis.
Wherein, the authoritative domain name server address that can obtain the corresponding cache name server according to the corresponding relation of the domain name of request analysis and caching nameserver.The domain name corresponding cache name server of request analysis had all sent the domain name mapping request at this domain name to authoritative domain name server.
Need to prove that the domain name of request analysis can corresponding a plurality of caching nameservers, namely a plurality of caching nameservers of the domain name of corresponding same request analysis all can receive the domain name mapping updating message.
Caching nameserver is updated to the second domain name mapping result with the first domain name mapping result in self buffer memory, can follow-up receive the domain name mapping request after, the second domain name mapping result of buffer memory is sent to terminal, thereby make terminal to second domain name mapping content server request content of correspondence as a result.
The method of the renewal domain name system buffer memory that the embodiment of the invention provides can be applied in first domain name mapping as a result the content server of correspondence break down or load in the scene above threshold value, the embodiment of the invention is by sending the domain name mapping updating message to caching nameserver, make that the first domain name mapping result of caching nameserver deletion self buffer memory is the second domain name mapping result, avoid returning the first wrong domain name mapping result to terminal.Caching nameserver is after the domain name mapping request that receives terminal subsequently, return the second domain name mapping result to terminal, and second domain name mapping content server operating state of correspondence is normal as a result, terminal can be to the normal content server request content of operating state.
Referring to Fig. 2, authoritative domain name server specifically can comprise in the step of execution to the domain name corresponding cache name server transmission domain name mapping updating message of request analysis in the embodiment of the invention one:
B1, in self buffer memory, search address with the domain name corresponding cache name server of request analysis according to the corresponding relation of preserving in advance.
Concrete, authoritative domain name server is according to the corresponding relation of preserving in advance, be the domain name of request analysis and the corresponding relation between the caching nameserver, in self buffer memory, search the address with the domain name corresponding cache name server of request analysis, the IP address that obtains this caching nameserver.
B2, send the domain name mapping updating message to the caching nameserver that finds.
Concrete, authoritative domain name server sends the domain name mapping updating message according to the IP address of caching nameserver to the caching nameserver that finds, so that receive the domain name mapping result of caching nameserver deletion self buffer memory of updating message.
Further, also comprise buffer update indication information and the second domain name mapping result in the domain name mapping updating message that the embodiment of the invention provides.The buffer update indication information is used to indicate caching nameserver the first domain name mapping result of buffer memory is updated to the second domain name mapping result.Caching nameserver is deleted the first domain name mapping result of self buffer memory according to this renewal indication information after receiving the domain name mapping updating message.
Referring to Fig. 3, Fig. 3 is the method flow diagram of the renewal domain name system buffer memory that provides of the embodiment of the invention two.
In embodiments of the present invention, terminal sends domain name mapping request, the domain name of carried terminal request analysis in this domain name mapping request to caching nameserver.Caching nameserver sends the domain name mapping request to authoritative domain name server.
The method of the renewal domain name system buffer memory that the embodiment of the invention two provides can comprise:
C1, receive the domain name mapping request that caching nameserver sends, comprise the domain name of request analysis in this domain name mapping request.
Concrete, authoritative domain name server receives the domain name mapping request that caching nameserver sends, and comprises the domain name of request analysis in this domain name mapping request.
The domain name mapping request that C2, basis receive is resolved the domain name of request analysis, obtains the first domain name mapping result.
Concrete, authoritative domain name server is resolved the domain name of request analysis according to the domain name mapping request that receives, and obtains the first domain name mapping result.Wherein, comprise the address of content server of this domain name correspondence and this first domain name mapping result's life span among the first domain name mapping result.In embodiments of the present invention, the first domain name mapping result's life span is called first life span.
Corresponding relation between the domain name of C3, the buffer memory first domain name mapping result and request analysis, and the domain name of request analysis and the corresponding relation between the caching nameserver, send the domain name mapping response to this caching nameserver, comprise the domain name of the first domain name mapping result and request analysis in this domain name mapping response.
Concrete, authoritative domain name server is carried out buffer memory with domain name and the corresponding relation between the caching nameserver of the corresponding relation between the domain name of the first domain name mapping result and request analysis, request analysis.Wherein, the time of the above-mentioned corresponding relation of authoritative domain name server buffer memory can come to determine flexibly as required, for example in second or hour calculate.
Authoritative domain name server also sends the domain name mapping response according to the domain name mapping request to caching nameserver, comprises the domain name of this first domain name mapping result and request analysis in the domain name mapping response.
Wherein, after caching nameserver receives domain name mapping response, send the first domain name mapping result to the terminal of correspondence, make terminal according to visiting corresponding content server according to the first domain name mapping result.
C4, first domain name mapping in detecting self buffer memory content server of correspondence are as a result broken down or are loaded above threshold value, obtain the second domain name mapping result of the domain name of request analysis, the domain name of this request analysis and first domain name mapping be correspondence as a result, and this second domain name mapping operating state of the content server of correspondence as a result is normal.
In embodiments of the present invention, authoritative domain name server is after sending the domain name mapping response to the corresponding cache name server, if subsequently detect first domain name mapping as a result the content server of correspondence break down or load above threshold value, then authoritative domain name server is carried out domain name mapping again to the domain name of request analysis, obtain the second domain name mapping result of the domain name of request analysis, second domain name mapping content server current working state of correspondence as a result is normal.
C5, send the domain name mapping updating message to the domain name corresponding cache name server of request analysis, carry the domain name of above-mentioned request analysis in the domain name mapping updating message, this domain name mapping updating message is used to indicate caching nameserver the first domain name mapping result of buffer memory is updated to the second domain name mapping result.
Concrete, authoritative domain name server is after obtaining the second domain name mapping result, to the domain name corresponding cache name server transmission domain name mapping updating message of request analysis.
Wherein, the authoritative domain name server address that can obtain the corresponding cache name server according to the corresponding relation of the domain name of request analysis and caching nameserver.The domain name corresponding cache name server of request analysis had all sent the domain name mapping request at this domain name to authoritative domain name server.Need to prove that the domain name of request analysis can corresponding a plurality of caching nameservers, namely a plurality of caching nameservers of the domain name of corresponding same request analysis all can receive the domain name mapping updating message.
In embodiments of the present invention, carry the domain name of request analysis in the domain name mapping updating message that authoritative domain name server sends, the domain name mapping updating message is used to indicate caching nameserver the first domain name mapping result of buffer memory is updated to the second domain name mapping result.
Caching nameserver is updated to the second domain name mapping result with the first domain name mapping result in self buffer memory, can follow-up receive the domain name mapping request after, the second domain name mapping result of buffer memory is sent to terminal, thereby make terminal to second domain name mapping content server request content of correspondence as a result.
Further, the embodiment of the invention two can also be after the first domain name mapping result's first life span be overtime, automatically delete the first domain name mapping result in self buffer memory and the address of caching nameserver, not only spatial cache can be saved, the performance of authoritative domain name server can also be improved.
The method of the renewal domain name system buffer memory that provides in the embodiment of the invention two can also be carried out following steps:
C6, the first domain name mapping result in self buffer memory is updated to the second domain name mapping result.
Concrete, authoritative domain name server can also be after obtaining the second domain name mapping result corresponding with the domain name of request analysis, and the first domain name mapping result in self buffer memory is updated to the second domain name mapping result.
Need to prove that the execution sequence between above-mentioned steps C5 and the step C6 is that time slot is irrelevant, its priority execution sequence does not constitute the restriction to the embodiment of the invention.
In the method for the renewal domain name system buffer memory that the embodiment of the invention one, two provides, authoritative domain name server detect domain name mapping as a result the content server of correspondence break down can be in the following way:
1) receives the domain name mapping fault reporting message of the content server transmission of correspondence as a result, judge that then content server breaks down.
Concrete, authoritative domain name server judges then that receiving first domain name mapping fault reporting message of the content server transmission of correspondence as a result this content server breaks down.
2) in preset time, do not receive the domain name mapping state reporting message of the content server transmission of correspondence as a result, judge that content server breaks down.
Concrete, authoritative domain name server does not receive first domain name mapping state reporting message of the content server transmission of correspondence as a result in preset time, judge that then content server breaks down.Wherein, preset time can be determined according to concrete content server.
It is pointed out that the above two kinds of possible state obtain manners that only provide, authoritative domain name server knows that whether breaking down of content server can also have other implementation.
Referring to Fig. 4, Fig. 4 is the flow chart of the method for the renewal domain name system buffer memory that provides of the embodiment of the invention three.
The method of the renewal domain name system buffer memory that the embodiment of the invention three provides mainly comprises:
D1, first domain name mapping in detecting self buffer memory are when the content server of correspondence breaks down or load above threshold value as a result, generate the domain name mapping result and delete message, this domain name mapping result deletes the first domain name mapping result that message is used for deletion caching nameserver buffer memory, this domain name mapping result deletes the domain name of carrying request analysis in the message, the domain name correspondence of the first domain name mapping result and request analysis.
Concrete, authoritative domain name server is cached with the first domain name mapping result, authoritative domain name server is when detecting first domain name mapping content server of correspondence breaks down or load above threshold value as a result, then generate the domain name mapping result and delete message, the domain name mapping result deletes the first domain name mapping result that message is used for deletion caching nameserver buffer memory.Wherein, the domain name mapping result deletes the domain name of carrying request analysis in the message, has corresponding relation between the first domain name mapping result of buffer memory and the domain name of request analysis.
D2, send the domain name mapping result to caching nameserver and delete message, so that the first domain name mapping result in this caching nameserver deletion self buffer memory, the domain name correspondence of caching nameserver and request analysis.
Concrete, authoritative domain name server sends this message to the domain name corresponding cache name server of request analysis after generating the domain name mapping result and deleting message.The domain name that it is pointed out that request analysis can corresponding a plurality of caching nameservers.
Caching nameserver is receiving after the domain name mapping result deletes message, with the first corresponding domain name mapping result of the domain name with request analysis in deletion self buffer memory.After the first domain name mapping result of caching nameserver in self buffer memory of deletion, can follow-up receive the domain name mapping request after, again to authoritative domain name server request domain name analysis result, and then obtain correct domain name mapping result.
The method of the renewal domain name system buffer memory that the embodiment of the invention provides can be applied in first domain name mapping as a result the content server of correspondence break down or load and be higher than in the scene of default thresholding, the embodiment of the invention is deleted message by sending the domain name mapping result to caching nameserver, make caching nameserver delete the first domain name mapping result of buffer memory, avoid returning the first wrong domain name mapping result to terminal.Caching nameserver is after the domain name mapping request that receives terminal subsequently, again to the correct domain name mapping result of authoritative domain name server request, correct domain name mapping result is sent to caching nameserver, and then make that terminal can be to correct content server request content.
Referring to Fig. 5, authoritative domain name server specifically can comprise to the step (step D2) that caching nameserver transmission domain name mapping result deletes message in execution in the embodiment of the invention three:
E1, in self buffer memory, search address with the domain name corresponding cache name server of request analysis according to the corresponding relation of preserving in advance.
Concrete, authoritative domain name server is according to the corresponding relation of preserving in advance, the i.e. domain name of the corresponding relation between the domain name of the first domain name mapping result and request analysis, request analysis and the corresponding relation between the caching nameserver, in self buffer memory, search and first domain name mapping address of corresponding cache name server as a result, the IP address that obtains this caching nameserver.
E2, send the domain name mapping result to the caching nameserver that finds and delete message.
Concrete, authoritative domain name server is deleted message according to the IP address of caching nameserver to the caching nameserver transmission domain name result who finds, so that receive caching nameserver deletion self the first domain name mapping result corresponding with domain name request analysis buffer memory of this deletion message.
Referring to Fig. 6, Fig. 6 is the method flow diagram of the renewal domain name system buffer memory that provides of the embodiment of the invention four.
In embodiments of the present invention, terminal sends the domain name mapping request to caching nameserver, carries the domain name of request analysis in this domain name mapping request.Caching nameserver sends the domain name mapping request to authoritative domain name server.
The method of the renewal domain name system buffer memory that the embodiment of the invention four provides can comprise:
F1, receive the domain name mapping request that caching nameserver sends, comprise the domain name of request analysis in this domain name mapping request.
Concrete, authoritative domain name server receives the domain name mapping request that caching nameserver sends, and comprises the domain name of request analysis in this domain name mapping request.
F2, according to this domain name mapping request the domain name of request analysis is resolved, obtain the first domain name mapping result.
Concrete, authoritative domain name server is resolved the domain name of request analysis according to the domain name mapping request that receives, and obtains the first domain name mapping result.Wherein, comprise the address of content server of this domain name correspondence and this first domain name mapping result's life span among the first domain name mapping result.In embodiments of the present invention, the first domain name mapping result's life span is called first life span.
Corresponding relation between the domain name of F3, this first domain name mapping result of buffer memory and request analysis and the domain name of request analysis and the corresponding relation between this caching nameserver, send the domain name mapping response to this caching nameserver, comprise the domain name of the first domain name mapping result and request analysis in this domain name mapping response.
Concrete, authoritative domain name server is carried out buffer memory with the domain name of the corresponding relation between the domain name of the first domain name mapping result and request analysis, request analysis and the corresponding relation that sends between the caching nameserver of domain name mapping request.Wherein, the time of the above-mentioned corresponding relation of authoritative domain name server buffer memory can come to determine flexibly as required, for example in second or hour calculate.The embodiment of the invention is by the above-mentioned corresponding relation of buffer memory, domain name mapping that can be in detecting self buffer memory is when the content server of correspondence breaks down as a result, obtain the address of corresponding cache name server according to the corresponding relation of buffer memory, so that upgrade the domain name mapping result of buffer memory in this caching nameserver.
Authoritative domain name server also sends the domain name mapping response according to the domain name mapping request to caching nameserver, comprises the domain name of this first domain name mapping result and request analysis in the domain name mapping response.
Wherein, after caching nameserver receives domain name mapping response, send the first domain name mapping result to the terminal of correspondence, terminal is visited corresponding content server according to the first domain name mapping result.
F4, detect first domain name mapping as a result the content server of correspondence break down or load above threshold value, generate the domain name mapping result and delete message, this domain name mapping result deletes message and is used for the first domain name mapping result that the deletion caching nameserver carries, the domain name mapping result deletes the domain name of carrying request analysis in the message, the domain name correspondence of this first domain name mapping result and request analysis.
Wherein, domain name mapping result deletes message and is used for the first domain name mapping result that the deletion caching nameserver carries.The domain name mapping result deletes the domain name of carrying request analysis in the message, has corresponding relation between the first domain name mapping result of buffer memory and the domain name of request analysis.
F5, send domain name mapping result to this caching nameserver and delete message, so that the first domain name mapping result in this caching nameserver deletion self buffer memory, the domain name correspondence of this caching nameserver and request analysis.
Concrete, authoritative domain name server can generate the domain name mapping result delete message after, send this message to the domain name corresponding cache name server of request analysis.It is to be noted, the domain name of request analysis can corresponding a plurality of caching nameservers, authoritative domain name server can send the domain name mapping results to a plurality of caching nameservers delete message, and then makes the first domain name mapping result in a plurality of caching nameservers deletions self buffer memory.
Caching nameserver is receiving after the domain name mapping result deletes message, with the first corresponding domain name mapping result of the domain name with request analysis in deletion self buffer memory.After the first domain name mapping result of caching nameserver in deletion self buffer memory, can follow-up receive the domain name mapping request of terminal pins to this request analysis after, again to authoritative domain name server request domain name analysis result, and then obtain correct domain name mapping result.
In the method for the renewal domain name system buffer memory that the embodiment of the invention three, four provides, authoritative domain name server detect domain name mapping as a result the content server of correspondence break down can be in the following way:
1) receives the domain name mapping fault reporting message of the content server transmission of correspondence as a result, judge that then content server breaks down.
Concrete, authoritative domain name server judges then that receiving first domain name mapping fault reporting message of the content server transmission of correspondence as a result this content server breaks down.
2) in preset time, do not receive the domain name mapping state reporting message of the content server transmission of correspondence as a result, judge that content server breaks down.
Concrete, authoritative domain name server does not receive first domain name mapping state reporting message of the content server transmission of correspondence as a result in preset time, judge that then content server breaks down.Wherein, preset time can be determined according to concrete content server.
It is pointed out that the above two kinds of possible obtain manners that only provide, authoritative domain name server knows that whether breaking down of content server can also have other implementation.
More than from authoritative domain name server one side the method for the update system buffer memory that the embodiment of the invention provides has been described, the method for the update system buffer memory that the embodiment of the invention provides is described from domain name caching server one side below.
Referring to Fig. 7, Fig. 7 is the flow chart of the method for the renewal domain name system buffer memory that provides of the embodiment of the invention five.
In the embodiment of the invention five, comprise the domain name of request analysis and the first domain name mapping result of this domain name correspondence in self buffer memory of caching nameserver.The domain name mapping of authoritative domain name server buffer memory in needs deletion self buffer memory domain name service is as a result the time, for example detect first domain name mapping as a result the content server of correspondence break down or load and be higher than default thresholding, then send the domain name mapping updating message to caching nameserver.The method of the renewal domain name system buffer memory that the embodiment of the invention five provides can comprise:
The domain name mapping updating message that G1, reception authoritative domain name server send, this domain name mapping updating message is used to indicate caching nameserver the first domain name mapping result of buffer memory is updated to the second domain name mapping result, carries the domain name of request analysis in this domain name mapping updating message.
Concrete, caching nameserver receives the domain name mapping updating message that authoritative domain name server sends, this domain name mapping updating message is used to indicate caching nameserver the first domain name mapping result of buffer memory is updated to the second domain name mapping result, carries the domain name of request analysis in the domain name mapping updating message.
Wherein, the caching nameserver first domain name mapping result that can in self buffer memory, upgrade to needs according to the domain name lookup of this request analysis.
G2, the first domain name mapping result in self buffer memory is updated to the second domain name mapping result, the domain name correspondence of this first domain name mapping result and request analysis.
Concrete, caching nameserver is updated to the second domain name mapping result according to upgrading indication information with first corresponding with the domain name of request analysis in the buffer memory domain name mapping result.
In embodiments of the present invention, caching nameserver is by being updated to the second domain name mapping result with the first domain name mapping result corresponding with the domain name of request analysis in self buffer memory, can be after receiving the domain name mapping request subsequently, with the domain name mapping result who upgrades, namely the second domain name mapping result sends to terminal.Compare with prior art, the embodiment of the invention can avoid terminal to the content server request content that breaks down by the domain name mapping result in deletion self buffer memory, further makes terminal to current available content server request content.
Further, also comprise life span among the second domain name mapping result of buffer memory in the caching nameserver, the second domain name mapping result's life span is called second life span in embodiments of the present invention, and then the embodiment of the invention can also comprise:
G3, after second life span is overtime, delete the second domain name mapping result in self buffer memory.
The embodiment of the invention not only can be saved the cache resources of caching nameserver by the second domain name mapping result of deletion above life span, can also make terminal obtain newer domain name mapping result.
Referring to Fig. 8, caching nameserver is specifically as follows the process (above-mentioned steps G2) that the first domain name mapping result in self buffer memory is updated to the second domain name mapping result in the embodiment of the invention five:
H1, in self buffer memory, search the first domain name mapping result corresponding with the domain name of request analysis according to the corresponding relation of preserving in advance.
Concrete, caching nameserver is according to the corresponding relation of preserving in advance, i.e. corresponding relation between the domain name of request analysis and the first domain name mapping result is searched the first domain name mapping result corresponding with the domain name of request analysis in self buffer memory.
Wherein, preserve the domain name of request analysis and the corresponding relation between the first domain name mapping result in the caching nameserver in advance.Caching nameserver can be after receiving the domain name mapping response that authoritative domain name server sends, and preserves the corresponding relation between the domain name of the first domain name mapping result in the domain name mapping response and request analysis in advance.
H2, the first domain name mapping result that will find are updated to the second domain name mapping result.
Concrete, the first domain name mapping result that caching nameserver will find is updated to the second domain name mapping result.
Referring to Fig. 9, Fig. 9 is the flow chart of the method for the renewal domain name system buffer memory that provides of the embodiment of the invention six.
In the embodiment of the invention six, comprise the domain name of request analysis and the first domain name mapping result of this domain name correspondence in self buffer memory of caching nameserver.The domain name mapping of authoritative domain name server buffer memory in needs deletion self caching nameserver is as a result the time, for example detect this first domain name mapping as a result the content server of correspondence break down or load and be higher than default thresholding, then send the domain name mapping result to caching nameserver and delete message.The method of the renewal domain name system buffer memory that the embodiment of the invention six provides can comprise:
The domain name mapping result that J1, reception authoritative domain name server send deletes message, this domain name mapping result deletes the domain name of carrying request analysis in the message, this domain name mapping result deletes message and is used for the first domain name mapping result that the deletion caching nameserver carries, the domain name correspondence of this first domain name mapping result and request analysis.
Concrete, the domain name mapping result that caching nameserver receives the authoritative domain name server transmission deletes message, this domain name mapping result deletes the domain name of carrying request analysis in the message, the domain name mapping result deletes message and is used for the first domain name mapping result that the deletion caching nameserver carries, the domain name correspondence of the first domain name mapping result and request analysis.
J2, delete the first domain name mapping result corresponding with the domain name of request analysis in self buffer memory.
Concrete, caching nameserver is deleted the first domain name mapping result corresponding with the domain name of request analysis according to this domain name mapping result information of deleting from buffer memory.
In embodiments of the present invention, if first domain name mapping content server of correspondence is as a result broken down or is loaded above default thresholding, caching nameserver is by the first domain name mapping result corresponding with the domain name of this request analysis in deletion self buffer memory, thereby after receiving the domain name mapping request subsequently, judge and do not have corresponding domain name mapping result in the buffer memory, then again to authoritative domain name server request domain name analysis result, namely send the domain name mapping request to authoritative domain name server, and then the domain name mapping result who to upgrade from authoritative domain name server, caching nameserver then sends the domain name mapping result that upgrades to the terminal of correspondence.
Compared with prior art, the embodiment of the invention can be avoided sending the address that exists fault or load to surpass the content server of thresholding to terminal, can avoid terminal to the content server request content that breaks down or load above thresholding, on the contrary can so that terminal to current available content server request content.
Further, in the method for the renewal domain name system buffer memory that the embodiment of the invention six provides, the first domain name mapping result's corresponding with the domain name of request analysis step (step J2) can be revised as 0 by the first domain name mapping result's that the domain name of request analysis is corresponding life span in caching nameserver deletion self buffer memory, be about to first life span and be revised as 0, caching nameserver will be deleted this first domain name mapping result automatically.
Referring to Figure 10, the first domain name mapping result's corresponding with the domain name of request analysis process (above-mentioned steps F2) in caching nameserver deletion self buffer memory in the embodiment of the invention six is specifically as follows:
L1, in self buffer memory, search the first domain name mapping result corresponding with the domain name of request analysis according to the corresponding relation of preserving in advance.
Concrete, caching nameserver is according to the corresponding relation of preserving in advance, i.e. corresponding relation between the domain name of request analysis and the first domain name mapping result is searched the first domain name mapping result corresponding with the domain name of request analysis in self buffer memory.
Wherein, preserve the domain name of request analysis and the corresponding relation between the first domain name mapping result in the caching nameserver in advance.Caching nameserver can be after receiving the domain name mapping response that authoritative domain name server sends, and preserves the corresponding relation between the domain name of the first domain name mapping result in the domain name mapping response and request analysis in advance.
L2, the first domain name mapping result deletion that will find.
Concrete, the first domain name mapping result deletion that caching nameserver will find.
More than the method for renewal domain name system buffer memory that the embodiment of the invention is provided describe in detail, for understanding the embodiment of the invention in more detail, provide the concrete application scenarios that the embodiment of the invention is upgraded the method for domain name system buffer memory below.
Referring to Figure 11, Figure 11 is the application scenarios figure of the method for the renewal domain name system buffer memory that provides of the embodiment of the invention seven.
Among this embodiment, certain content supplier (domain name is www.abc.com) disposes 2 content server Server1 and Server2 in certain zone, authoritative domain name server is in charge of the state of Server1 and Server2, Server1 and Server2 periodically send the state reporting message to authoritative domain name server under situation working properly.Local DNS is this regional caching nameserver, has some user terminals, for example UE1 and UE2 in this zone.
The method of the renewal domain name system buffer memory that the embodiment of the invention seven provides mainly comprises:
S1, Local DNS receive the domain name mapping request that UE1 sends.
In the embodiment of the invention seven, carry the domain name www.abc.com of request analysis and the address of terminal in the domain name mapping request that UE1 sends.
S2, Local DNS send the domain name mapping request to authoritative domain name server.
Concrete, Local DNS does not have this domain name of buffer memory www.abc.com correspondence in this locality domain name mapping is as a result the time, send domain name mapping request, the address of carrying domain name www.abc.com and the caching nameserver of request analysis in this domain name mapping request to authoritative domain name server.Wherein, the address of caching nameserver can be the IP address of caching nameserver.
S3, authoritative domain name server are carried out domain name mapping according to the domain name mapping request, obtain the first domain name mapping result.
Concrete, authoritative domain name server can be searched the first domain name mapping result corresponding with the domain name of request analysis, comprises the address of content server among the first domain name mapping result.In embodiments of the present invention, working properly as Server1, can think when user terminal provides content service, comprise the address ip1 of Server1 and the first domain name mapping result's life span among the first domain name mapping result.
Corresponding relation between the domain name of the corresponding relation between the domain name of S4, the authoritative domain name server buffer memory first domain name mapping result and request analysis, the address of Local DNS and request analysis, and to Local DNS transmission domain name mapping response.
Concrete, authoritative domain name server sends the domain name mapping response according to the domain name mapping request that receives to Local DNS, carries the first domain name mapping result in this domain name mapping response.
The corresponding relation of authoritative domain name server between the caching nameserver of the domain name of the corresponding relation between the domain name of self buffer memory first domain name mapping result and request analysis, request analysis and request domain name analysis.In embodiments of the present invention, authoritative domain name server between the address of self buffer memory domain name www.abc.com and LocalDNS corresponding relation and the corresponding relation between domain name www.abc.com and the first domain name mapping result.
S5, authoritative domain name server send the domain name mapping response to Local DNS.
Concrete, authoritative domain name server sends the domain name mapping response according to the domain name mapping request to Local DNS, wherein carries the first domain name mapping result.
S6, the response of Local DNS acceptance domain name analysis, the buffer memory first domain name mapping result.
S7, Local DNS send the domain name mapping response to UE1, wherein carry the first domain name mapping result.
S8, UE1 according to the first domain name mapping result to content server S erver1 request content.
S9-S10, authoritative domain name server detect Server1 and break down, and obtain the second domain name mapping result.
Concrete, authoritative domain name server receives the fault reporting message that Server1 sends, or judges the Server1 fault after not receiving the state reporting message of Server1 in the preset time, obtains the second domain name mapping result.In embodiments of the present invention, authoritative domain name server is at the fault reporting message that does not receive Server 2 transmissions or receive the state reporting message that Server 2 sends in preset time, the state of then judging Server 2 is normal, obtains the IP address of Server2.The IP address and second life span that comprise server2 among the second domain name mapping result.
S11, authoritative domain name server are updated to the second domain name mapping result with the first domain name mapping result corresponding with www.abc.com in self buffer memory.
Authoritative domain name server is searched the first domain name mapping result of www.abc.com correspondence in self buffer memory in the embodiment of the invention seven, the first domain name mapping result is updated to the second domain name mapping result, comprise that specifically the address with the Server1 among the first domain name mapping result is updated to the address of Server 2, and the first domain name mapping result's life span (i.e. first life span) is updated to the second domain name mapping result's life span (i.e. second life span).
S12, authoritative domain name server send the domain name mapping updating message to Local DNS, comprise buffer update indication information, the second domain name mapping result and domain name www.abc.com in the domain name mapping updating message.
Concrete, the domain name mapping updating message can be the newly-increased type of message of the embodiment of the invention, comprises buffer update indication information, the second domain name mapping result and domain name www.abc.com in this message.
Wherein, the life span (second life span) that comprises the address of the address of Server 2 and Server 2 among the second domain name mapping result.
S13, Local DNS acceptance domain name analysis updating message are updated to the second domain name mapping result with first corresponding with Server1 in the buffer memory domain name mapping result.
In embodiments of the present invention, Local DNS is updated to the second domain name mapping result with first corresponding with domain name www.abc.com in the buffer memory domain name mapping result.Renewal process comprises that specifically the address of the Server1 among the first domain name mapping result just is updated to the address of Server 2, and the first domain name mapping result's life span (i.e. first life span) is updated to the second domain name mapping result's life span (i.e. second life span).
Whether wherein, Local DNS also can authenticate the legitimacy of this updating message after receiving the domain name mapping updating message, for example, the IP address of transmit leg is authenticated, consistent with the source IP address that sent the domain name mapping response last time.Authoritative domain name server can also be carried the authentication code that generates according to certain key simultaneously, and the cryptographic algorithm of key and use can return to Local DNS in advance in the domain name mapping response message.After Local DNS receives the domain name mapping updating message, according to the password that obtains in advance and cryptographic algorithm, recomputate authentication code, judge whether the authentication code that receives is consistent with the authentication code that calculates, if it is consistent, then authentication is passed through, according to the first domain name mapping result of the deletion of the indication information in the domain name mapping updating message self buffer memory.
The embodiment of the invention can strengthen the fail safe of domain name system by increasing the legitimacy authentication to the domain name mapping updating message.
In the embodiment of the invention seven, UE2 can be to Local DNS request domain name analysis.
S14, Local DNS receive the domain name mapping request that UE2 sends.
In embodiments of the present invention, carry the domain name www.abc.com of request analysis in the domain name mapping request that UE2 sends.
S15, Local DNS obtain the analysis result of this domain name in self buffer memory, return domain name mapping response, the address of wherein carrying Server 2 to UE2.
Wherein, Local DNS searches the domain name mapping result corresponding with domain name www.abc.com in self buffer memory, be the second domain name mapping result in embodiments of the present invention, wherein comprises the address of Server 2.
S16, UE2 according to the second domain name mapping result to content server S erver 2 request contents.
In embodiments of the present invention, the operating state of Server is normal, and UE2 can be to the required content of Server 2 requests.
In embodiments of the present invention, Local DNS and the authoritative domain name server domain name mapping result in the overtime back of TTL deletion self buffer memory.Local DNS is behind deletion domain name mapping result, if after receiving the domain name mapping request again, do not exist this domain name mapping result then in the buffer memory this moment, send the domain name mapping request to authoritative domain name server, authoritative domain name server is then carried out domain name mapping according to the domain name mapping request, return the result of domain name mapping, and the result of domain name mapping is carried out buffer memory.After Local DNS receives the domain name mapping result, carry out this domain name mapping of buffer memory result in this locality, and return the domain name mapping result and give the requesting users terminal.
The method of the renewal domain name system buffer memory that the embodiment of the invention seven provides can still used on the former TTL manufacturing basis, and the result of the domain name mapping of buffer memory avoids terminal request content service failure or service delay on the Local DNS that upgrades in time.
More than the method for renewal domain name system buffer memory that the embodiment of the invention is provided have been described in detail.
Referring to Figure 12, Figure 12 is the structural representation of the authoritative domain name server that provides of the embodiment of the invention eight.
The authoritative domain name server that the embodiment of the invention eight provides comprises:
Analysis result acquiring unit 110, be used in first domain name mapping that detects self buffer memory when the content server of correspondence breaks down or load above threshold value as a result, obtain the second domain name mapping result of the domain name of request analysis, the domain name of this request analysis and this first domain name mapping be correspondence as a result, and this second domain name mapping operating state of the content server of correspondence as a result is normal;
Updating message transmitting element 120, be used for sending the domain name mapping updating message to the domain name corresponding cache name server of request analysis, carry the domain name of request analysis in this domain name mapping updating message, this domain name mapping updating message is used to indicate this caching nameserver the first domain name mapping result of buffer memory is updated to the second domain name mapping result.
Wherein, the authoritative domain name server that the embodiment of the invention eight provides can be used in the method embodiment one of the renewal domain name system buffer memory of aforementioned correspondence, and details are referring to the description of above-described embodiment one.The authoritative domain name server that the embodiment of the invention provides is by sending the domain name mapping updating message to caching nameserver, make that the first domain name mapping result of caching nameserver deletion self buffer memory is the second domain name mapping result, avoid returning the first wrong domain name mapping result to terminal.Caching nameserver is after the domain name mapping request that receives terminal subsequently, return the second domain name mapping result to terminal, and second domain name mapping content server operating state of correspondence is normal as a result, terminal can be to the normal content server request content of operating state.
The authoritative domain name server that the embodiment of the invention eight provides can also comprise:
First updating block 130 is used for after above-mentioned analysis result acquiring unit 110 obtains the second domain name mapping result of domain name of request analysis, and the first domain name mapping result in self buffer memory is updated to the second domain name mapping result.
Referring to Figure 13, Figure 13 is the structural representation of the authoritative domain name server that provides of the embodiment of the invention nine.
The authoritative domain name server that the embodiment of the invention nine provides comprises:
First receiving element 210 is used for receiving the domain name mapping request that caching nameserver sends, and comprises the domain name of request analysis in this domain name mapping request;
Domain name mapping unit 220 is used for according to this domain name mapping request the domain name of request analysis being resolved, and obtains the first domain name mapping result;
Buffer unit 230 is for corresponding relation and the domain name of request analysis and the corresponding relation between this caching nameserver between the domain name of this first domain name mapping result of buffer memory and request analysis;
Resolution response transmitting element 240 is used for sending the domain name mapping response to this caching nameserver, comprises the domain name of the above-mentioned first domain name mapping result and above-mentioned request analysis in this domain name mapping response;
Analysis result acquiring unit 250, be used in first domain name mapping that detects self buffer memory when the content server of correspondence breaks down or load above threshold value as a result, obtain the second domain name mapping result of the domain name of request analysis, the domain name of request analysis and above-mentioned first domain name mapping be correspondence as a result, and this second domain name mapping operating state of the content server of correspondence as a result is normal;
Updating message transmitting element 260, be used for sending the domain name mapping updating message to the domain name corresponding cache name server of request analysis, carry the domain name of above-mentioned request analysis in this domain name mapping updating message, this domain name mapping updating message is used to indicate this caching nameserver the first domain name mapping result of buffer memory is updated to the second domain name mapping result.
Wherein, the authoritative domain name server that the embodiment of the invention nine provides can be used in the method embodiment two of the renewal domain name system buffer memory of aforementioned correspondence, and details are referring to the description of above-described embodiment two.
Further, the authoritative domain name server that provides of the embodiment of the invention nine also comprises:
First updating block 270 is used for after analysis result acquiring unit 250 obtains the second domain name mapping result of domain name of request analysis, and the first domain name mapping result in self buffer memory is updated to the second domain name mapping result.
Referring to Figure 14, Figure 14 is the structural representation of updating message transmitting element in the authoritative domain name server that provides of the embodiment of the invention nine.
Updating message transmitting element 260 can comprise in the authoritative domain name server that the embodiment of the invention nine provides:
First searches module 261, is used for searching address with the domain name corresponding cache name server of request analysis according to the corresponding relation of preserving in advance at self buffer memory;
Updating message sending module 262, be used for sending the domain name mapping updating message to the caching nameserver that finds, carry the domain name of request analysis in this domain name mapping updating message, this domain name mapping updating message is used to indicate this caching nameserver the first domain name mapping result of buffer memory is updated to the above-mentioned second domain name mapping result.
The concrete structure of the updating message transmitting element 260 among the concrete structure that it is pointed out that the updating message transmitting element 120 that the embodiment of the invention eight provides and the embodiment nine is identical, is not described in detail here.
Be the structural representation of the authoritative domain name server that provides of the embodiment of the invention ten referring to 15, Figure 15.
The authoritative domain name server that the embodiment of the invention ten provides can comprise:
Deletion message generation unit 310, be used in first domain name mapping that detects self buffer memory when the content server of correspondence breaks down or load above threshold value as a result, generate the domain name mapping result and delete message, this domain name mapping result deletes message and is used for the first domain name mapping result that the deletion caching nameserver carries, this domain name mapping result deletes the domain name of carrying request analysis in the message, and the domain name of request analysis and above-mentioned first domain name mapping be correspondence as a result;
Deletion message sending unit 320, be used for sending this domain name mapping result to this caching nameserver and delete message, so that the first domain name mapping result in this caching nameserver deletion self buffer memory, the domain name correspondence of this this caching nameserver and above-mentioned request analysis.
Wherein, the authoritative domain name server that the embodiment of the invention ten provides can be used in the method embodiment three of the renewal domain name system buffer memory of aforementioned correspondence, and details are referring to the description of above-described embodiment three.The authoritative domain name server that the embodiment of the invention provides is deleted message by sending the domain name mapping result to caching nameserver, make caching nameserver delete the first domain name mapping result of buffer memory, avoid returning the first wrong domain name mapping result to terminal.Caching nameserver is after the domain name mapping request that receives terminal subsequently, again to the correct domain name mapping result of authoritative domain name server request, correct domain name mapping result is sent to caching nameserver, and then make that terminal can be to correct content server request content.
Referring to Figure 16, Figure 16 is the structural representation of deletion message sending unit in the authoritative domain name server that provides of the embodiment of the invention ten.
Deletion message sending unit 320 specifically can comprise in the authoritative domain name server that the embodiment of the invention ten provides:
Second searches module 321, is used for searching address with the domain name corresponding cache name server of request analysis according to the corresponding relation of preserving in advance at self buffer memory;
Deletion message transmission module 322, be used for sending the domain name mapping result to the caching nameserver that finds and delete message, so that the first domain name mapping result in this caching nameserver deletion self buffer memory, the domain name correspondence of this caching nameserver and request analysis.
Referring to Figure 17, Figure 17 is the structural representation of the authoritative domain name server that provides of the embodiment of the invention 11.
The authoritative domain name server that the embodiment of the invention 11 provides can comprise:
First receiving element 410 is used for receiving the domain name mapping request that caching nameserver sends, and comprises the domain name of request analysis in this domain name mapping request;
Domain name mapping unit 420 is used for according to this domain name mapping request the domain name of request analysis being resolved, and obtains the first domain name mapping result;
Buffer unit 430 is for corresponding relation and the domain name of request analysis and the corresponding relation between this caching nameserver between the domain name of the buffer memory first domain name mapping result and request analysis;
Resolution response transmitting element 440 is used for sending the domain name mapping response to this caching nameserver, comprises the domain name of the above-mentioned first domain name mapping result and above-mentioned request analysis in this domain name mapping response.
Deletion message generation unit 450, be used in first domain name mapping that detects self buffer memory when the content server of correspondence breaks down or load above threshold value as a result, generate the domain name mapping result and delete message, this domain name mapping result deletes message and is used for the first domain name mapping result that the deletion caching nameserver carries, this domain name mapping result deletes the domain name of carrying request analysis in the message, and the domain name of request analysis and first domain name mapping be correspondence as a result;
Deletion message sending unit 460, be used for sending this domain name mapping result to this caching nameserver and delete message, so that the first domain name mapping result in this caching nameserver deletion self buffer memory, the domain name correspondence of this caching nameserver and above-mentioned request analysis.
Wherein, the authoritative domain name server that the embodiment of the invention 11 provides can be used in the method embodiment four of the renewal domain name system buffer memory of aforementioned correspondence, and details are referring to the description of above-described embodiment four.
The concrete structure of the deletion message sending unit 320 among the concrete structure that it is pointed out that the deletion message sending unit 460 that the embodiment of the invention 11 provides and the embodiment ten is identical, is not described in detail here.
Referring to Figure 18, Figure 18 is the structural representation of the caching nameserver that provides of the embodiment of the invention 12.
The caching nameserver that the embodiment of the invention 12 provides comprises:
Updating message receiving element 510, be used for receiving the domain name mapping updating message that authoritative domain name server sends, this domain name mapping updating message is used to indicate this caching nameserver the first domain name mapping result of buffer memory is updated to the above-mentioned second domain name mapping result, carries the domain name of request analysis in this domain name mapping updating message;
Second updating block 520 is used for the first domain name mapping result of self buffer memory is updated to the above-mentioned second domain name mapping result, the domain name correspondence of the first domain name mapping result and request analysis.
The caching nameserver that the embodiment of the invention 12 provides can use in the method embodiment five of the renewal domain name system buffer memory of aforementioned correspondence, and details are referring to the description of above-described embodiment five.At caching nameserver that the embodiment of the invention provides by the first domain name mapping result corresponding with the domain name of request analysis in self buffer memory is updated to the second domain name mapping result, can be after receiving the domain name mapping request subsequently, with the domain name mapping result who upgrades, namely the second domain name mapping result sends to terminal.Compare with prior art, the embodiment of the invention can avoid terminal to the content server request content that breaks down by the domain name mapping result in deletion self buffer memory, further makes terminal to current available content server request content.
Further, the caching nameserver that provides of the embodiment of the invention 12 can further include:
Overtime delete cells 530 is used for after second life span is overtime, deletes this second domain name mapping result in self buffer memory.
Referring to Figure 19, Figure 19 is the structural representation of second updating block in the caching nameserver that provides of the embodiment of the invention 12.
Second updating block 520 can comprise in the caching nameserver that the embodiment of the invention 12 provides:
The 3rd searches module 521, is used for searching the first domain name mapping result corresponding with the domain name of request analysis, the domain name correspondence of this first domain name mapping result and above-mentioned request analysis according to the corresponding relation of preserving in advance at self buffer memory;
Buffer update module 522, the first domain name mapping result who is used for finding is updated to this second domain name mapping result.
Referring to Figure 20, Figure 20 is the structural representation of the caching nameserver that provides of the embodiment of the invention 13.
The caching nameserver that the embodiment of the invention 13 provides comprises:
Deletion message sink unit 610, the domain name mapping result who is used for the transmission of reception authoritative domain name server deletes message, this domain name mapping result deletes the domain name of carrying request analysis in the message, this domain name mapping result deletes message and is used for the first domain name mapping result that the deletion caching nameserver carries, the domain name correspondence of this first domain name mapping result and above-mentioned request analysis;
Deletion performance element 620 is used for self buffer memory of deletion first domain name mapping result corresponding with the domain name of request analysis.
The caching nameserver that the embodiment of the invention 13 provides can use in the method embodiment six of the renewal domain name system buffer memory of aforementioned correspondence, and details are referring to the description of above-described embodiment six.The caching nameserver that the embodiment of the invention provides is by the first domain name mapping result corresponding with the domain name of this request analysis in deletion self buffer memory, thereby after receiving the domain name mapping request subsequently, judge and do not have corresponding domain name mapping result in the buffer memory, then again to authoritative domain name server request domain name analysis result, namely send the domain name mapping request to authoritative domain name server, and then the domain name mapping result who to upgrade from authoritative domain name server, caching nameserver sends the domain name mapping result that upgrades to the terminal of correspondence.Compared with prior art, the embodiment of the invention can be avoided sending the address that exists fault or load to surpass the content server of thresholding to terminal, can avoid terminal to the content server request content that breaks down or load above thresholding, on the contrary can so that terminal to current available content server request content.
Referring to Figure 21, Figure 21 is the structural representation of deletion performance element in the caching nameserver that provides of the embodiment of the invention 13.
Deletion performance element 620 can comprise in the caching nameserver that the embodiment of the invention 13 provides:
The 4th searches module 621, is used for searching the first domain name mapping result corresponding with the domain name of request analysis according to the corresponding relation of preserving in advance at self buffer memory;
Buffer memory removing module 622 is used for the first domain name mapping result deletion that will find.
Need to prove, contents such as the information interaction in above-mentioned caching nameserver and the authoritative domain name server between each unit, implementation, since with the inventive method embodiment based on same design, particular content can repeat no more referring to the narration among the inventive method embodiment herein.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in above-described embodiment method, be to instruct relevant hardware to finish by computer program, program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (RandomAccess Memory, RAM) etc.
More than method and authoritative domain name server, the caching nameserver of renewal domain name system buffer memory that the embodiment of the invention is provided be described in detail, for one of ordinary skill in the art, thought according to the embodiment of the invention, the part that all can change in specific embodiments and applications, this description should not be construed as limitation of the present invention.

Claims (23)

1. a method of upgrading the domain name system buffer memory is characterized in that, comprising:
First domain name mapping of authoritative domain name server in detecting self buffer memory is when the content server of correspondence breaks down or load above threshold value as a result, obtain the second domain name mapping result of the domain name of request analysis, the domain name that described request is resolved and described first domain name mapping be correspondence as a result, and described second domain name mapping operating state of the content server of correspondence as a result is normal;
The domain name corresponding cache name server that described authoritative domain name server is resolved to described request sends the domain name mapping updating message, domain name is resolved and to be carried the domain name that described request is resolved in the updating message, and domain name is resolved updating message and is used to indicate described caching nameserver the first domain name mapping result of buffer memory is updated to the described second domain name mapping result;
Described first domain name mapping in detecting self buffer memory when the content server of correspondence breaks down or loads above threshold value as a result before, also comprise:
Described authoritative domain name server receives the domain name mapping request that caching nameserver sends, and comprises the domain name of request analysis in the domain name analysis request;
The domain name that described authoritative domain name server is resolved described request according to the domain name analysis request is resolved, and obtains the first domain name mapping result;
Corresponding relation and the domain name of request analysis and the corresponding relation between the described caching nameserver between the domain name that the described first domain name mapping result of described authoritative domain name server buffer memory and described request are resolved, send the domain name mapping response to described caching nameserver, comprise the domain name that the described first domain name mapping result and described request are resolved in the domain name resolution response.
2. method according to claim 1 is characterized in that, after the second domain name mapping result of the described domain name of obtaining request analysis, also comprises:
Described authoritative domain name server is updated to the described second domain name mapping result with the described first domain name mapping result in self buffer memory.
3. method according to claim 1 is characterized in that, described detect in self buffer memory first domain name mapping as a result the content server of correspondence break down, comprising:
Receive the fault reporting message that sends of the content server of correspondence as a result of first domain name mapping in self buffer memory, perhaps in preset time, do not receive the state reporting message that described content server sends, judge that then described content server breaks down.
4. method according to claim 1 is characterized in that, described domain name corresponding cache name server of resolving to described request sends the domain name mapping updating message, comprising:
The address of in self buffer memory, searching the domain name corresponding cache name server of resolving with described request according to the corresponding relation of preserving in advance;
Send the domain name mapping updating message to the caching nameserver that finds.
5. according to each described method of claim 1 to 4, it is characterized in that,
Domain name is resolved in the updating message and is also comprised buffer update indication information and the second domain name mapping result, and described buffer update indication information is used to indicate described caching nameserver the first domain name mapping result of buffer memory is updated to the described second domain name mapping result.
6. a method of upgrading the domain name system buffer memory is characterized in that, comprising:
First domain name mapping of authoritative domain name server in detecting self buffer memory is when the content server of correspondence breaks down or load above threshold value as a result, generate the domain name mapping result and delete message, domain name analysis result deletion message is used for the first domain name mapping result of deletion caching nameserver, carry the domain name of request analysis in the domain name analysis result deletion message, the domain name that described request is resolved and described first domain name mapping be correspondence as a result;
Described authoritative domain name server sends domain name analysis result deletion message to described caching nameserver, so that after the first domain name mapping result in described caching nameserver deletion self buffer memory, follow-up receive the domain name mapping request after, again to authoritative domain name server request domain name analysis result, and then obtain correct domain name mapping result, the domain name correspondence that described caching nameserver and described request are resolved;
Described detect first domain name mapping in self buffer memory the content server of correspondence break down or load above threshold value as a result before, also comprise:
Described authoritative domain name server receives the domain name mapping request that caching nameserver sends, and comprises the domain name of request analysis in the domain name analysis request;
The domain name that described authoritative domain name server is resolved described request according to the domain name analysis request is resolved, and obtains the first domain name mapping result;
The domain name that corresponding relation between the domain name that the described first domain name mapping result of described authoritative domain name server buffer memory and described request are resolved and described request are resolved and the corresponding relation between the described caching nameserver, send the domain name mapping response to described caching nameserver, comprise the domain name that the described first domain name mapping result and described request are resolved in the domain name resolution response.
7. method according to claim 6 is characterized in that, described detect in self buffer memory first domain name mapping as a result the content server of correspondence break down, comprising:
Receive first domain name mapping fault reporting message that sends of the content server of correspondence as a result in self buffer memory, perhaps in preset time, do not receive the state reporting message that described content server sends, judge that then described content server breaks down.
8. method according to claim 6 is characterized in that, described domain name corresponding cache name server to request analysis sends domain name analysis result deletion message, comprising:
The address of in self buffer memory, searching the domain name corresponding cache name server of resolving with described request according to the corresponding relation of preserving in advance;
Send the domain name mapping result to the caching nameserver that finds and delete message.
9. a method of upgrading the domain name system buffer memory is characterized in that, comprising:
Caching nameserver receives the domain name mapping updating message that authoritative domain name server sends, domain name is resolved updating message and is used to indicate caching nameserver the first domain name mapping result of buffer memory is updated to the second domain name mapping result, and domain name is resolved the domain name of carrying request analysis in the updating message;
First domain name mapping that it is described authoritative domain name server in detecting self buffer memory that domain name is resolved updating message sends to caching nameserver when the content server of correspondence breaks down or load above threshold value as a result;
Described caching nameserver is updated to the described second domain name mapping result with the first domain name mapping result in self buffer memory, the domain name correspondence that the described first domain name mapping result and described request are resolved;
Described caching nameserver receives before the domain name mapping updating message of authoritative domain name server transmission, also comprises:
Described caching nameserver sends the domain name mapping request to described authoritative domain name server, comprises the domain name of request analysis in the domain name analysis request;
Described caching nameserver receives the domain name mapping response that described authoritative domain name server sends, and comprises the domain name that the described first domain name mapping result and described request are resolved in the domain name resolution response.
10. method according to claim 9 is characterized in that, also comprises second life span among the described second domain name mapping result, and described method also comprises:
Described caching nameserver is deleted the described second domain name mapping result in self buffer memory after described second life span is overtime.
11. method according to claim 9 is characterized in that, described the first domain name mapping result in self buffer memory is updated to the described second domain name mapping result, comprising:
In self buffer memory, search the first domain name mapping result corresponding with the domain name of request analysis according to the corresponding relation of preserving in advance;
The first domain name mapping result who finds is updated to the described second domain name mapping result.
12. a method of upgrading the domain name system buffer memory is characterized in that, comprising:
The domain name mapping result that caching nameserver receives the authoritative domain name server transmission deletes message, carry the domain name of request analysis in the domain name analysis result deletion message, domain name analysis result deletion message is used for the first domain name mapping result that the deletion caching nameserver carries, the domain name correspondence that the described first domain name mapping result and described request are resolved; First domain name mapping that domain name analysis result deletion message is described authoritative domain name server in detecting self buffer memory sends to caching nameserver when the content server of correspondence breaks down or load above threshold value as a result;
After the corresponding first domain name mapping result of the domain name of resolving with described request in described caching nameserver deletion self buffer memory, follow-up receive the domain name mapping request after, again to authoritative domain name server request domain name analysis result, and then obtain correct domain name mapping result;
The domain name mapping result that described caching nameserver reception authoritative domain name server sends also comprises before deleting message:
Described caching nameserver sends the domain name mapping request to authoritative domain name server, comprises the domain name of request analysis in the domain name analysis request; Described caching nameserver receives the domain name mapping response that the domain name authorization server sends, and comprises the domain name that the described first domain name mapping result and described request are resolved in the domain name resolution response.
13. method according to claim 12 is characterized in that, the first domain name mapping result corresponding with the domain name of request analysis in described deletion self buffer memory comprises:
In self buffer memory, search the first domain name mapping result corresponding with the domain name of request analysis according to the corresponding relation of preserving in advance;
With the first domain name mapping result deletion that finds.
14. an authoritative domain name server is characterized in that, comprising:
The analysis result acquiring unit, be used in first domain name mapping that detects self buffer memory when the content server of correspondence breaks down or load above threshold value as a result, obtain the second domain name mapping result of the domain name of request analysis, the domain name that described request is resolved and described first domain name mapping be correspondence as a result, and described second domain name mapping operating state of the content server of correspondence as a result is normal;
The updating message transmitting element, be used for sending the domain name mapping updating message to the domain name corresponding cache name server that described request is resolved, domain name is resolved and to be carried the domain name that described request is resolved in the updating message, and domain name is resolved updating message and is used to indicate described caching nameserver the first domain name mapping result of buffer memory is updated to the described second domain name mapping result;
Also comprise:
First receiving element, be used in first domain name mapping that detects self buffer memory before the content server of correspondence breaks down or load above threshold value as a result, receive the domain name mapping request that caching nameserver sends, comprise the domain name of request analysis in the domain name analysis request;
The domain name mapping unit is used for resolving according to the domain name that the domain name analysis request is resolved described request, obtains the first domain name mapping result;
Buffer unit is for corresponding relation and the domain name of request analysis and the corresponding relation between the described caching nameserver between the domain name of the buffer memory first domain name mapping result and described request parsing;
The resolution response transmitting element is used for sending the domain name mapping response to described caching nameserver, comprises the domain name that the described first domain name mapping result and described request are resolved in the domain name resolution response.
15. authoritative domain name server according to claim 14 is characterized in that, also comprises:
First updating block is used for after described analysis result acquiring unit obtains the second domain name mapping result of domain name of request analysis, and the described first domain name mapping result in self buffer memory is updated to the described second domain name mapping result.
16. authoritative domain name server according to claim 14 is characterized in that, described updating message transmitting element comprises:
First searches module, is used for searching the domain name corresponding cache name server of resolving with described request according to the corresponding relation of preserving in advance at self buffer memory;
The updating message sending module, be used for sending the domain name mapping updating message to the caching nameserver that finds, domain name is resolved and to be carried the domain name that described request is resolved in the updating message, and domain name is resolved updating message and is used to indicate described caching nameserver the first domain name mapping result of buffer memory is updated to the described second domain name mapping result.
17. an authoritative domain name server is characterized in that, comprises
The deletion message generation unit, be used in first domain name mapping that detects self buffer memory when the content server of correspondence breaks down or load above threshold value as a result, generate the domain name mapping result and delete message, domain name analysis result deletion message is used for the first domain name mapping result that the deletion caching nameserver carries, carry the domain name of request analysis in the domain name analysis result deletion message, the domain name of request analysis and described first domain name mapping be correspondence as a result;
The deletion message sending unit, be used for sending domain name analysis result deletion message to described caching nameserver, so that after the first domain name mapping result in described caching nameserver deletion self buffer memory, follow-up receive the domain name mapping request after, again to authoritative domain name server request domain name analysis result, and then obtain correct domain name mapping result, the domain name correspondence that described caching nameserver and described request are resolved;
Also comprise:
First receiving element, be used in first domain name mapping that detects self buffer memory before the content server of correspondence breaks down or load above threshold value as a result, receive the domain name mapping request that caching nameserver sends, comprise the domain name of request analysis in the domain name analysis request;
The domain name mapping unit is used for resolving according to the domain name that the domain name analysis request is resolved described request, obtains the first domain name mapping result;
Buffer unit is for corresponding relation and the domain name of request analysis and the corresponding relation between the described caching nameserver between the domain name of the buffer memory first domain name mapping result and described request parsing;
The resolution response transmitting element is used for sending the domain name mapping response to described caching nameserver, comprises the domain name that the described first domain name mapping result and described request are resolved in the domain name resolution response.
18. authoritative domain name server according to claim 17 is characterized in that, described deletion message sending unit comprises:
Second searches module, is used for according to the corresponding relation of preserving in advance in address that self buffer memory is searched the domain name corresponding cache name server of resolving with described request;
The deletion message transmission module, be used for sending the domain name mapping result to the caching nameserver that finds and delete message, so that the first domain name mapping result in described caching nameserver deletion self buffer memory, the domain name correspondence that described caching nameserver and described request are resolved.
19. a caching nameserver is characterized in that, comprising:
The updating message receiving element, be used for receiving the domain name mapping updating message that authoritative domain name server sends, domain name is resolved updating message and is used to indicate caching nameserver the first domain name mapping result of buffer memory is updated to the second domain name mapping result, and domain name is resolved the domain name of carrying request analysis in the updating message; First domain name mapping that it is described authoritative domain name server in detecting self buffer memory that domain name is resolved updating message sends to caching nameserver when the content server of correspondence breaks down or load above threshold value as a result;
Second updating block is used for the first domain name mapping result of self buffer memory being updated to the described second domain name mapping result, the domain name correspondence that the described first domain name mapping result and described request are resolved;
Described caching nameserver also is used for receiving before the domain name mapping updating message of authoritative domain name server transmission, sends the domain name mapping request to described authoritative domain name server, comprises the domain name of request analysis in the domain name analysis request; And receive the domain name mapping response that described authoritative domain name server sends, comprise the domain name that the described first domain name mapping result and described request are resolved in the domain name resolution response.
20. caching nameserver according to claim 19 is characterized in that, also comprises second life span among the described second domain name mapping result, described caching nameserver also comprises:
Overtime delete cells is used for after described second life span is overtime, deletes the described second domain name mapping result in self buffer memory.
21. caching nameserver according to claim 19 is characterized in that, described second updating block comprises:
The 3rd searches module, is used for searching the first domain name mapping result corresponding with the domain name of request analysis, the domain name correspondence that the described first domain name mapping result and described request are resolved according to the corresponding relation of preserving in advance at self buffer memory;
The buffer update module, the first domain name mapping result who is used for finding is updated to the described second domain name mapping result.
22. a caching nameserver is characterized in that, comprising:
Deletion message sink unit, the domain name mapping result who is used for the transmission of reception authoritative domain name server deletes message, carry the domain name of request analysis in the domain name analysis result deletion message, domain name analysis result deletion message is used for the first domain name mapping result that the deletion caching nameserver carries, the domain name correspondence that the described first domain name mapping result and described request are resolved; First domain name mapping that domain name analysis result deletion message is described authoritative domain name server in detecting self buffer memory sends to caching nameserver when the content server of correspondence breaks down or load above threshold value as a result;
The deletion performance element is used for deletion self the buffer memory first domain name mapping result corresponding with the domain name of described request parsing;
Described caching nameserver also is used for after the deletion first domain name mapping result, follow-up receive the domain name mapping request after, again to authoritative domain name server request domain name analysis result, and then obtain correct domain name mapping result;
Described caching nameserver, the domain name mapping result who also is used for the transmission of reception authoritative domain name server deletes before the message, sends the domain name mapping request to authoritative domain name server, comprises the domain name of request analysis in the domain name analysis request; And receive the domain name mapping response that the domain name authorization server sends, comprise the domain name that the described first domain name mapping result and described request are resolved in the domain name resolution response.
23. caching nameserver according to claim 22 is characterized in that, described deletion performance element comprises:
The 4th searches module, is used for searching the first domain name mapping result corresponding with the domain name of request analysis according to the corresponding relation of preserving in advance at self buffer memory;
The buffer memory removing module is used for the first domain name mapping result deletion that will find.
CN201010612278.6A 2010-12-29 2010-12-29 Method for caching of domain name system, authorized domain name server and cache domain name server Expired - Fee Related CN102137174B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201010612278.6A CN102137174B (en) 2010-12-29 2010-12-29 Method for caching of domain name system, authorized domain name server and cache domain name server
PCT/CN2011/083913 WO2012089013A1 (en) 2010-12-29 2011-12-14 Domain name system caching method, authorized domain name server and caching domain name server

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201010612278.6A CN102137174B (en) 2010-12-29 2010-12-29 Method for caching of domain name system, authorized domain name server and cache domain name server

Publications (2)

Publication Number Publication Date
CN102137174A CN102137174A (en) 2011-07-27
CN102137174B true CN102137174B (en) 2013-10-09

Family

ID=44296827

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201010612278.6A Expired - Fee Related CN102137174B (en) 2010-12-29 2010-12-29 Method for caching of domain name system, authorized domain name server and cache domain name server

Country Status (2)

Country Link
CN (1) CN102137174B (en)
WO (1) WO2012089013A1 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102137174B (en) * 2010-12-29 2013-10-09 华为技术有限公司 Method for caching of domain name system, authorized domain name server and cache domain name server
CN102984286B (en) * 2012-11-14 2015-03-04 上海牙木通讯技术有限公司 Method and device and system of domain name server (DNS) for buffering updating
CN104427011B (en) * 2013-09-02 2019-03-22 中兴通讯股份有限公司 The method and domain name cache server of domain name mapping
CN104639666B (en) * 2013-11-06 2019-04-16 腾讯科技（深圳）有限公司 Method for accessing domain name and device
CN106210158B (en) * 2015-05-04 2020-03-27 阿里巴巴集团控股有限公司 Domain name resolution synchronization method and device
CN104935683A (en) * 2015-06-29 2015-09-23 北京经天科技有限公司 Buffer processing method and device for domain name resolution
CN106331201A (en) * 2015-07-01 2017-01-11 中兴通讯股份有限公司 Domain name system resource record caching control method and server
CN106331205B (en) * 2015-07-01 2019-02-05 中兴通讯股份有限公司 The centralized management method, apparatus and relevant device of domain name resources record buffer memory
CN105245633A (en) * 2015-10-19 2016-01-13 北京奇虎科技有限公司 Safe domain name system and fault handling method
CN106610975A (en) * 2015-10-21 2017-05-03 北京国双科技有限公司 Method and device for updating configuration list of cache server
CN105939399A (en) * 2015-11-30 2016-09-14 杭州迪普科技有限公司 Domain name resolution method and device
CN109639748B (en) * 2017-10-09 2021-10-26 阿里巴巴集团控股有限公司 Cache updating method, device and system of DNS (Domain name Server) and domain name system
CN109451090B (en) * 2018-11-13 2021-08-10 郑州云海信息技术有限公司 Domain name resolution method and device
CN114143230B (en) * 2020-09-02 2023-07-21 中国移动通信集团安徽有限公司 Dual-stack user DNS analysis duration calculation method and device
CN114157635B (en) * 2020-09-07 2023-08-15 中国移动通信集团湖南有限公司 Domain name back-source method and device for content distribution network, equipment and storage medium
CN113286016B (en) * 2021-07-20 2021-09-28 中国人民解放军国防科技大学 Method and device for analyzing service range of cache domain name system
CN116382809B (en) * 2023-05-26 2023-10-20 荣耀终端有限公司 Application program starting method and electronic equipment
CN118018528A (en) * 2023-12-15 2024-05-10 中国移动通信集团有限公司 Domain name resolution record updating method and device and computer readable storage medium

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101272407A (en) * 2008-04-28 2008-09-24 杭州华三通信技术有限公司 Caching detecting method, caching detecting device and detection responding device for domain name system
CN101431539A (en) * 2008-12-11 2009-05-13 华为技术有限公司 Domain name resolution method, system and apparatus
CN101465768A (en) * 2009-01-12 2009-06-24 上海及第熊软件科技有限公司 Method and system for implementing website disaster-tolerating and error-tolerating operation
CN101895591A (en) * 2010-07-23 2010-11-24 北京邮电大学 Method and domain name server for increasing robustness of credible Internet domain name service

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7725602B2 (en) * 2000-07-19 2010-05-25 Akamai Technologies, Inc. Domain name resolution using a distributed DNS network
EP2159983A1 (en) * 2008-08-26 2010-03-03 BRITISH TELECOMMUNICATIONS public limited company Content distribution network
CN102137174B (en) * 2010-12-29 2013-10-09 华为技术有限公司 Method for caching of domain name system, authorized domain name server and cache domain name server

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101272407A (en) * 2008-04-28 2008-09-24 杭州华三通信技术有限公司 Caching detecting method, caching detecting device and detection responding device for domain name system
CN101431539A (en) * 2008-12-11 2009-05-13 华为技术有限公司 Domain name resolution method, system and apparatus
CN101465768A (en) * 2009-01-12 2009-06-24 上海及第熊软件科技有限公司 Method and system for implementing website disaster-tolerating and error-tolerating operation
CN101895591A (en) * 2010-07-23 2010-11-24 北京邮电大学 Method and domain name server for increasing robustness of credible Internet domain name service

Also Published As

Publication number Publication date
WO2012089013A1 (en) 2012-07-05
CN102137174A (en) 2011-07-27

Similar Documents

Publication Publication Date Title
CN102137174B (en) Method for caching of domain name system, authorized domain name server and cache domain name server
US11909639B2 (en) Request routing based on class
CN107943594B (en) Data acquisition method and device
CN108270882B (en) Domain name resolution method and device, storage medium and electronic device
KR101956486B1 (en) Method and system for facilitating terminal identifiers
CN102970284B (en) User profile processing method and server
KR20110055392A (en) User-based dns server access control
CN102685074B (en) Anti-phishing network communication system and method
CN106210155B (en) Method and device for connecting application server
CN109951482B (en) User terminal and block chain domain name resolution method thereof
CN112153170B (en) Method, device and equipment for accessing server and storage medium
US11163499B2 (en) Method, apparatus and system for controlling mounting of file system
KR101996471B1 (en) Network Securing Device and Securing method Using The Same
CN103581040A (en) Server distributing device and server distributing method
CN105592083A (en) Method and device for terminal to have access to server by using token
CN109413224B (en) Message forwarding method and device
CN112039993B (en) Long connection address processing method and device
CN110191203B (en) Method for realizing dynamic access of server and electronic equipment
US8996607B1 (en) Identity-based casting of network addresses
US8281000B1 (en) Variable-length nonce generation
CN111092966B (en) Domain name system, domain name access method and device
CN111522649B (en) Distributed task allocation method, device and system
CN113420241A (en) Page access method and device, electronic equipment and storage medium
CN109995887B (en) DNS (Domain name Server) analysis method and device and computer readable storage medium
CN111614750A (en) Data updating method, system, equipment and storage medium

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: NANTONG TIANYUAN GAS CO., LTD.

Free format text: FORMER OWNER: HUIZHOU ZHITAI ENTERPRISE MANAGEMENT CO., LTD.

Effective date: 20141231

Owner name: HUIZHOU ZHITAI ENTERPRISE MANAGEMENT CO., LTD.

Free format text: FORMER OWNER: HUAWEI TECHNOLOGY CO., LTD.

Effective date: 20141231

C41 Transfer of patent application or patent right or utility model
COR Change of bibliographic data

Free format text: CORRECT: ADDRESS; FROM: 516003 HUIZHOU, GUANGDONG PROVINCE TO: 226000 NANTONG, JIANGSU PROVINCE

Free format text: CORRECT: ADDRESS; FROM: 518129 SHENZHEN, GUANGDONG PROVINCE TO: 516003 HUIZHOU, GUANGDONG PROVINCE

TR01 Transfer of patent right

Effective date of registration: 20141231

Address after: Chen Qiao street Gangzha District 226000 Jiangsu city of Nantong Province Rong Sheng Lu No. 99

Patentee after: NANTONG TIANYUAN GAS Co.,Ltd.

Address before: 516003 Guangdong province Huizhou City Mountain Road No. 4 Building 12 layer Dweh No. 06 A District

Patentee before: HUIZHOU ZHITAI ENTERPRISE MANAGEMENT CO.,LTD.

Effective date of registration: 20141231

Address after: 516003 Guangdong province Huizhou City Mountain Road No. 4 Building 12 layer Dweh No. 06 A District

Patentee after: HUIZHOU ZHITAI ENTERPRISE MANAGEMENT CO.,LTD.

Address before: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen

Patentee before: HUAWEI TECHNOLOGIES Co.,Ltd.

CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20131009

Termination date: 20181229

CF01 Termination of patent right due to non-payment of annual fee