CN103856569A - Method and device for synchronizing domain name system resource information - Google Patents
Method and device for synchronizing domain name system resource information Download PDFInfo
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- CN103856569A CN103856569A CN201210495998.8A CN201210495998A CN103856569A CN 103856569 A CN103856569 A CN 103856569A CN 201210495998 A CN201210495998 A CN 201210495998A CN 103856569 A CN103856569 A CN 103856569A
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Abstract
The embodiment of the invention is a method and device for synchronizing domain name system resource information, aims to solve the problem that the domain name system multi-level cache is prone to the data inconsistency, and can ensure that the user can obtain the correct IP address. The method includes the following steps that: a domain name system DNS server receives resource information which needs to be updated, and stores the resource information in a DNS server domain name update database; the resource information comprises correspondence relationship between the domain name and the IP address; the resource information in the DNS server domain name update database is synchronized by the DNS server to a DNS database and a DNS cache of the DNS server; and, the DNS server sends the resource information stored in the DNS server domain name update database to connected network nodes.
Description
Technical field
The present invention relates to technical field of the computer network, relate in particular to a kind of method and apparatus of synchronous domain name system resource information.
Background technology
On Internet, between domain name and IP address, be one to one, although domain name is convenient to people's memory, but can only identify IP address between machine, the conversion work between them is called domain name mapping, domain name mapping need to be completed by special domain name system DNS server.DNS is a distributed based on Client/Server pattern, is according to certain hierarchical structure tissue, is responsible for the application layer such as HTTP, FTP business domain name mapping service is provided.
In the time that user passes through browser access some websites, user side main frame can send domain name mapping request to local dns server, if can find IP address corresponding to this domain name in the database of local dns server or high-speed cache, directly IP address information is replied to user's main frame; Otherwise, it may submit request to because can not directly resolving to upper level dns server, upper level dns server is upwards submitted to more successively, until certain grade of DNS dns server can be resolved to the IP address corresponding with this domain name in database or high-speed cache.Visible, may there are many dns servers from user to this grade of dns server, and the name that they all can buffer memory have been resolved is to the mapping of IP address, later in the time that user accesses this website again, just need not send analysis request to upper level dns server again, but directly from local dns server high-speed cache, take out, thereby can accelerate the speed of accessed web page, and the analysis request quantity between minimizing dns server, reduces some unnecessary network traffics.
Based on same principle, when subscriber's main station is received behind the IP address of dns resolution result of dns server reply, also this IP address information can be saved in the DNS buffer memory of main frame this locality, if there is again so the inquiry request of repetition next time, system can preferentially be inquired about local cache, if existing corresponding entry is no longer initiated request to dns server, in buffer memory, just inquire about dns server when no record.The object of setting this DNS buffer memory is the load in order to reduce dns server, need not repeatedly resolve for same domain name, also can accelerate the access speed of user rs host online simultaneously.Browser manufacturer, in order to accelerate the access speed of webpage, also can be saved in the mapping relations between domain name and IP address in the local dns buffer memory of browser program.
In DNS high-speed cache, domain name can not preserved for a long time to the map record of IP address, DNS is called life span TTL (Time To Live) in domain name to a time interval is set in the mapping of IP address, spent this period of time, dns server is eliminated this map entry from buffer memory.In the time that user asks, it can be submitted to and ask and re-start mapping to upper level dns server again.If ttl value is too large, in this time interval, a lot of requests can be mapped on out-of-date IP address, cause domain name and IP address to occur erroneous matching.If ttl value is too little, suppose it is 0, can cause local dns server to submit request to DNS continually, increase the network traffics of domain name mapping, make higher level's dns server become a new bottleneck in system.
Owing to all existing DNS buffer memory in dns server, user side main frame and browser, this distributed multi-stage buffer lacks enough interaction mechanisms under prior art framework, easily there is the inconsistent problem of data each other, cause the reliability and maintainability of system bad.If variation has occurred the mapping relations between certain domain name and certain IP address, unless user sends dns resolution request in time, domain name and IP address just there will be erroneous matching, cause service operation failure, and user sees wrong access result.Give an example, if a certain station server lost efficacy, will cause domain name mapping to see service disruption to the user of this server.System manager can not momentarily cut out service by a station server and safeguard, as carry out operating system and application software upgrade, this need to revise the IP address list in dns server, the IP address of this server is therefrom crossed out, then wait the preceding paragraph time, etc. all dns servers, this domain name is eliminated to the mapping of this station server, and till all client computer that is mapped to this station server do not re-use this website.
Summary of the invention
The embodiment of the present invention provides a kind of method of synchronous domain name system resource information, be used for the DNS buffer memorys at different levels of the domain name system of synchronizing network, guarantee that user can obtain correct IP address, and then guarantee that the miscellaneous service platform on server can normally be accessed.
The method of a kind of synchronous domain name system resource information that the embodiment of the present invention provides comprises:
Dns server receives needs the resource information upgraded, and this resource information is stored in to dns server domain name more in new database, and wherein, described resource information comprises the corresponding relation of domain name and IP address;
Dns server by dns server domain name more the resource information in new database be synchronized in the DNS database and DNS high-speed cache of dns server; And,
Dns server by be stored in dns server domain name more the resource information in new database send to the network node of connection.
The method of the synchronous domain name system resource of the another kind information that the embodiment of the present invention provides comprises:
Subscriber's main station sends DNS update request according to pre-conditioned to dns server;
The resource information that the needs that subscriber's main station sends dns server upgrade is stored in more new database of subscriber's local domain name, and wherein, described resource information comprises the corresponding relation of domain name and IP address;
Subscriber's main station by subscriber's local domain name more the resource information of new database be synchronized in local dns buffer memory and browser DNS buffer memory.
A kind of dns server that the embodiment of the present invention provides comprises:
The first respond module, needs for receiving the resource information upgraded, and this resource information is stored in to dns server domain name more in new database, and wherein, described resource information comprises the corresponding relation of domain name and IP address;
More new database of dns server domain name, for storing the resource information that needs renewal;
Synchronization module, for by dns server domain name more the resource information of new database be synchronized to DNS database and the DNS high-speed cache of dns server;
The second respond module, for by be stored in dns server domain name more the resource information of new database send to the network node of connection.
A kind of subscriber's main station that the embodiment of the present invention provides comprises:
Update module, for sending DNS update request according to pre-conditioned to dns server;
More new database of subscriber's local domain name, the resource information of upgrading for storing the needs of dns server transmission, wherein, described resource information comprises the corresponding relation of domain name and IP address;
Respond module, the resource information of upgrading for receiving the needs of dns server transmission, and the resource information that the needs that dns server is sent upgrade is stored in more new database of subscriber's local domain name;
Synchronization module, for by subscriber's local domain name more the resource information of new database be synchronized to local dns buffer memory and browser DNS buffer memory.
As seen through the above technical solutions, in the present invention, dns server is stored in dns server domain name more in new database by resource information; Dns server by dns server domain name more the resource information in new database be synchronized in the DNS database and DNS high-speed cache of dns server; And dns server receives the DNS update request that the network node that connects sends, by be stored in dns server domain name more the resource information in new database send to this network node; This scheme has been synchronized to the lastest imformation of dns server in dns servers at different levels and user's buffer memorys at different levels, guarantees that user can obtain correct IP address, has improved user's webpage access speed; Meanwhile, due to domain name more new database isolated contacting directly of user and dns server, improved the fail safe of system.
Accompanying drawing explanation
The schematic flow sheet that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is the schematic flow sheet of specific embodiment provided by the invention;
Fig. 3 is another schematic flow sheet of specific embodiment provided by the invention;
Fig. 4 is another schematic flow sheet of specific embodiment provided by the invention;
The structural representation of a kind of dns server that Fig. 5 provides for the embodiment of the present invention;
Another structural representation of a kind of dns server that Fig. 6 provides for the embodiment of the present invention;
Another structural representation of a kind of dns server that Fig. 7 provides for the embodiment of the present invention;
The structural representation of a kind of subscriber's main station that Fig. 8 provides for the embodiment of the present invention;
Another structural representation of a kind of subscriber's main station that Fig. 9 provides for the embodiment of the present invention.
Embodiment
The embodiment of the present invention provides a kind of method and apparatus of synchronous domain name system DNS resource information, in order to the DNS buffer memorys at different levels in the domain name system of synchronizing network, guarantee that user can obtain correct IP address, and then guarantee that the miscellaneous service platform on server can normally be accessed.
Referring to Fig. 1, the method for a kind of synchronous domain name system resource information that the embodiment of the present invention provides comprises:
S001, dns server receive needs the resource information upgraded, and this resource information is stored in to dns server domain name more in new database, and wherein, described resource information comprises the corresponding relation of domain name and IP address;
S002, dns server by dns server domain name more the resource information in new database be synchronized in the DNS database and DNS high-speed cache of dns server; And,
S003, dns server by be stored in dns server domain name more the resource information in new database send to the network node of connection.
Preferably, described dns server receives the resource information that needs renewal, comprising: dns server receives the resource information that monitoring equipment sends; Or dns server receives the resource information that higher level's dns server sends.In addition, can also comprise by web and hold the new resource information transmitting.
Preferably, described monitoring equipment, is responsible for the WEB server/caching server cluster in monitoring network, and the resource record that the needs of the corresponding generation of this server cluster generation state variation are upgraded sends to dns server.
Preferably, the resource information that the needs that receive when described dns server upgrade, when the resource information sending for higher level's dns server, the method also comprises: dns server sends DNS update request according to pre-conditioned superior dns server;
The resource information that higher level's dns server that dns server receives sends, for: the resource information that higher level's dns server that dns server receives sends according to described DNS update request.
Preferably, described pre-conditioned, be timed sending, or send as required.
Preferably, described resource information, also comprises rise time and the life span of the corresponding relation of each domain name and IP address; Wherein, when life span finishes, delete this resource information.
Preferably, the network node of described connection, comprising: subscriber's main station, and the next stage dns server of described dns server.
Preferably, in the time that the network node of described connection is subscriber's main station, the method also comprises:
Dns server determines that dns server domain name more has the resource information that needs renewal in new database, carries DNS and upgrades indication in the dns resolution results messages that sends to subscriber's main station; Described dns server receives the DNS update request that subscriber's main station sends;
Described dns server by be stored in dns server domain name more the resource information in new database send to the network node of connection, comprise: the DNS update request that described dns server sends according to subscriber's main station, by be stored in dns server domain name more the resource information in new database send to subscriber's main station.
Preferably, described DNS upgrades the message that is designated as dns resolution result, and wherein, the reserve bytes of the 16bit attribute field in this message is nonzero value; Or,
Described DNS upgrades and is designated as an independent notification message.
The method of the synchronous domain name system resource of the another kind information that the embodiment of the present invention provides comprises:
Subscriber's main station sends DNS update request according to pre-conditioned to dns server;
The resource information that the needs that subscriber's main station sends dns server upgrade is stored in more new database of subscriber's local domain name, and wherein, described resource information comprises the corresponding relation of domain name and IP address;
Subscriber's main station by subscriber's local domain name more the resource information of new database be synchronized in local dns buffer memory and browser DNS buffer memory.
Preferably, described subscriber's main station sends DNS update request according to pre-conditioned to dns server, comprising: subscriber's main station timing sends DNS update request to dns server; Or subscriber's main station is determined the notice that carries DNS renewal in the dns resolution results messages receiving, send DNS update request to dns server; Or in the message of the definite dns resolution result receiving of subscriber's main station, the reserve bytes of 16bit attribute field is nonzero value, sends DNS update request to dns server.
Preferably, described resource information, also comprises:
The rise time of the corresponding relation of each domain name and IP address and life span; Wherein, when life span finishes, delete this resource information.
Provide several specific embodiments of the invention below.
Specific embodiment 1: user side initiatively sends after DNS update request, whether dns server is inquired about local domain name more has the resource information RR that needs renewal in new database; If had, the RR record that these need to be upgraded sends to user side main frame; The domain name that RR record data are saved in the machine by user side main frame more in new database, is synchronized to DNS local cache and the browser DNS buffer memory of user side.As Fig. 2, concrete steps are as follows:
The update module timing of S101, user side main frame or send DNS update request to main dns server as required, if the machine has been set many dns servers, can send DNS update request to other dns servers successively.
The second respond module of S102, dns server receives DNS update request, and whether the domain name of querying server more has the resource information RR that needs renewal in new database; If had, the RR that the second respond module need to be upgraded these sends to user side main frame.
The respond module of S103, user side main frame receives these RR that need to upgrade, and these RR are stored in to more new database of subscriber's local domain name.
S104, user side host-initiated synchronization module, be synchronized to DNS local cache and browser DNS buffer memory by the domain name RR record that more needs of new database upgrade.
Specific embodiment 2: user side is passive to be sent after DNS update request, whether dns server is inquired about local domain name more has the resource information RR that needs renewal in new database; If had, the RR record that these need to be upgraded sends to user side main frame; The domain name that RR record data are saved in the machine by user side main frame more in new database, is synchronized to DNS local cache and the browser DNS buffer memory of user side.As Fig. 3, concrete steps are as follows:
S201, dns server provide normal dns resolution service for user side main frame, and subscriber's main station sends domain name mapping request to dns server, and dns server returns to domain name mapping result to subscriber's main station; Dns server is in returning results, and whether the domain name of querying server more has the resource RR record that needs renewal in new database.
S202, dns server determine that dns server domain name more has in new database needs the resource information upgraded, carries DNS update notification giving in the return data of subscriber's main station; Or,
Dns server determines that dns server domain name more has the resource information that needs renewal in new database, and in the DNS message of return data of giving subscriber's main station, the reserve bytes of 16bit attribute field is set to non-zero.
What the update module reception dns server of S203, user side main frame sent more has the information that needs the resource information of upgrading in new database about definite dns server domain name, to dns server transmission DNS update request;
The second respond module of S204, dns server receives DNS update request, and whether the domain name of querying server more has the resource information RR that needs renewal in new database; If had, the RR that the second respond module need to be upgraded these sends to user side main frame.
The respond module of S205, user side main frame receives these RR that need to upgrade, and these RR are stored in to more new database of subscriber's local domain name.
S206, user side host-initiated synchronization module, be synchronized to DNS local cache and browser DNS buffer memory by the domain name RR record that more needs of new database upgrade.
Specific embodiment 3:DNS server superior dns server sends DNS update request, and higher level's dns server sends the resource information that needs renewal to this dns server.Referring to Fig. 4, concrete steps are as follows:
The update module timing of S301, a dns server or send domain name update request to upper level dns server as required; If the machine has been set many upper level dns servers, can send successively domain name update request to other dns servers.
The second respond module of S302, upper level dns server receives after domain name update request, and whether the domain name of inquiry book server more has the resource information RR that needs renewal in new database;
If had, return to the result of corresponding DNS RR record to the first respond module of the dns server of transmission DNS update request.
The RR record that the first respond module of S303, dns server need to be upgraded these is stored in more new database of domain name.
S304, dns server start synchronization module, and the domain name RR record that more needs of new database upgrade is synchronized to DNS database and the high-speed cache in dns server.
Referring to Fig. 5, a kind of dns server that the embodiment of the present invention provides comprises:
The first respond module 41, needs for receiving the resource information upgraded, and this resource information is stored in to dns server domain name more in new database, and wherein, described resource information comprises the corresponding relation of domain name and IP address;
More new database of dns server domain name, for storing the resource information that needs renewal;
Synchronization module 42, for by dns server domain name more the resource information of new database be synchronized to DNS database and the DNS high-speed cache of dns server;
The second respond module 43, for by be stored in dns server domain name more the resource information of new database send to the network node of connection.
Preferably, when the first respond module is used for receiving the resource information that needs renewal, specifically for:
Receive the resource information that monitoring equipment sends; Or,
Receive the resource information that higher level's dns server sends.
Referring to Fig. 6, preferably, when the first respond module 41 for receive higher level's dns server send resource information time, this dns server also comprises:
Preferably, described resource information, also comprises: rise time and the life span of the corresponding relation of each domain name and IP address; Wherein, when life span finishes, delete this resource information.
Preferably, the network node of described connection, comprising:
Subscriber's main station, and the next stage dns server of described dns server.
Referring to Fig. 7, preferably, in the time that the network node connecting is subscriber's main station, this dns server also comprises:
Preferably, described DNS upgrades the message that is designated as dns resolution result, and wherein, the reserve bytes of the 16bit attribute field in this message is nonzero value.
Referring to Fig. 8, a kind of subscriber's main station that the embodiment of the present invention provides comprises:
More new database of subscriber's local domain name, the resource information of upgrading for storing the needs of dns server transmission, wherein, described resource information comprises the corresponding relation of domain name and IP address;
Respond module 52, the resource information of upgrading for receiving the needs of dns server transmission, and the resource information that the needs that dns server is sent upgrade is stored in more new database of subscriber's local domain name;
Referring to Fig. 9, preferably, this subscriber's main station also comprises: notice receiver module 54 be nonzero value for the reserve bytes of message 16bit attribute field of determining the dns resolution result receiving, and update notifications module 51 sends DNS update request;
Preferably, described resource information, also comprises:
The rise time of the corresponding relation of each domain name and IP address and life span; Wherein, when life span finishes, delete this resource information.
In sum, the embodiment of the present invention provides a kind of method and apparatus of synchronous domain name system resource information, the DNS buffer memorys at different levels that are used for the domain name system of synchronizing network, this scheme has guaranteed that user can obtain correct IP address, has improved user's webpage access speed; And, due to adopt domain name more new database isolated contacting directly of user and dns server, improved the fail safe of system.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, completely implement software example or the form in conjunction with the embodiment of software and hardware aspect.And the present invention can adopt the form at one or more upper computer programs of implementing of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) that wherein include computer usable program code.
The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction that makes to carry out by the processor of computer or other programmable data processing device produces the device for realizing the function of specifying at flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame on computer or other programmable devices.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (20)
1. a method for synchronous domain name system resource information, is characterized in that, the method comprises:
Domain name system DNS server receives needs the resource information upgraded, and this resource information is stored in to dns server domain name more in new database, and wherein, described resource information comprises the corresponding relation of domain name and IP address;
Dns server by dns server domain name more the resource information in new database be synchronized in the DNS database and DNS high-speed cache of dns server; And,
Dns server by be stored in dns server domain name more the resource information in new database send to the network node of connection.
2. the method for claim 1, is characterized in that, described dns server receives the resource information that needs renewal, comprising:
Dns server receives the resource information that monitoring equipment sends; Or,
Dns server receives the resource information that higher level's dns server sends.
3. method as claimed in claim 2, is characterized in that, before described dns server receives the resource information that needs to upgrade, the method also comprises: dns server sends DNS update request according to pre-conditioned superior dns server;
Described dns server receives the resource information that needs renewal, is specially: dns server receives the resource information that higher level's dns server sends according to described DNS update request.
4. the method for claim 1, is characterized in that, described resource information, also comprises:
The rise time of the corresponding relation of each domain name and IP address and life span; Wherein, when life span finishes, delete this resource information.
5. the method for claim 1, is characterized in that, the network node of described connection, comprising:
Subscriber's main station, and the next stage dns server of described dns server.
6. method as claimed in claim 5, is characterized in that, in the time that the network node of described connection is subscriber's main station, the method also comprises:
Dns server determines that dns server domain name more has the resource information that needs renewal in new database, carries DNS and upgrades indication in the dns resolution results messages that sends to subscriber's main station;
Described dns server receives the DNS update request that subscriber's main station sends;
Described dns server by be stored in dns server domain name more the resource information in new database send to the network node of connection, comprising:
The DNS update request that described dns server sends according to subscriber's main station, by be stored in dns server domain name more the resource information in new database send to subscriber's main station.
7. method as claimed in claim 6, is characterized in that, described DNS upgrades the message that is designated as dns resolution result, and wherein, the reserve bytes of the 16bit attribute field in this message is nonzero value.
8. a method for synchronous domain name system resource information, is characterized in that, the method comprises:
Subscriber's main station sends DNS update request according to pre-conditioned to dns server;
The resource information that the needs that subscriber's main station sends dns server upgrade is stored in more new database of subscriber's local domain name, and wherein, described resource information comprises the corresponding relation of domain name and IP address;
Subscriber's main station by subscriber's local domain name more the resource information of new database be synchronized in local dns buffer memory and browser DNS buffer memory.
9. method as claimed in claim 8, is characterized in that, described subscriber's main station sends DNS update request according to pre-conditioned to dns server, comprising:
In the message of the definite dns resolution result receiving of subscriber's main station, the reserve bytes of 16bit attribute field is nonzero value, sends DNS update request to dns server.
10. method as claimed in claim 8, is characterized in that, described resource information, also comprises:
The rise time of the corresponding relation of each domain name and IP address and life span; Wherein, when life span finishes, delete this resource information.
11. 1 kinds of dns servers, is characterized in that, this dns server comprises:
The first respond module, needs for receiving the resource information upgraded, and this resource information is stored in to dns server domain name more in new database, and wherein, described resource information comprises the corresponding relation of domain name and IP address;
More new database of dns server domain name, for storing the resource information that needs renewal;
Synchronization module, for by dns server domain name more the resource information of new database be synchronized to DNS database and the DNS high-speed cache of dns server;
The second respond module, for by be stored in dns server domain name more the resource information of new database send to the network node of connection.
12. dns servers as claimed in claim 11, is characterized in that, when the first respond module is used for receiving the resource information that needs renewal, specifically for:
Receive the resource information that monitoring equipment sends; Or,
Receive the resource information that higher level's dns server sends.
13. dns servers as claimed in claim 12, is characterized in that, in the time that the first respond module is used for receiving the resource information of higher level's dns server transmission, this dns server also comprises:
Update module, for sending DNS update request according to pre-conditioned superior dns server.
14. dns servers as claimed in claim 11, is characterized in that, described resource information, also comprises:
The rise time of the corresponding relation of each domain name and IP address and life span; Wherein, when life span finishes, delete this resource information.
15. dns servers as claimed in claim 11, is characterized in that, the network node of described connection, comprising:
Subscriber's main station, and the next stage dns server of described dns server.
16. dns servers as claimed in claim 15, is characterized in that, in the time that the network node connecting is subscriber's main station, this dns server also comprises:
Notification module, for determine dns server domain name more new database have need upgrade resource information, in the dns resolution results messages that sends to subscriber's main station, carry DNS upgrade indication; And receive subscriber's main station send DNS update request.
17. dns servers as claimed in claim 16, is characterized in that, described DNS upgrades the message that is designated as dns resolution result, and wherein, the reserve bytes of the 16bit attribute field in this message is nonzero value.
18. 1 kinds of subscriber's main stations, is characterized in that, this subscriber's main station comprises:
Update module, for sending DNS update request according to pre-conditioned to dns server;
More new database of subscriber's local domain name, the resource information of upgrading for storing the needs of dns server transmission, wherein, described resource information comprises the corresponding relation of domain name and IP address;
Respond module, the resource information of upgrading for receiving the needs of dns server transmission, and the resource information that the needs that dns server is sent upgrade is stored in more new database of subscriber's local domain name;
Synchronization module, for by subscriber's local domain name more the resource information of new database be synchronized to local dns buffer memory and browser DNS buffer memory.
19. subscriber's main stations as claimed in claim 18, is characterized in that, this subscriber's main station also comprises:
Notice receiver module, is nonzero value for the reserve bytes of message 16bit attribute field of determining the dns resolution result receiving, and update notifications module sends DNS update request.
20. subscriber's main stations as claimed in claim 18, is characterized in that, described resource information, also comprises:
The rise time of the corresponding relation of each domain name and IP address and life span; Wherein, when life span finishes, delete this resource information.
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| CN104506664A (en) * | 2014-11-24 | 2015-04-08 | 小米科技有限责任公司 | Domain name system caching method and device |
| CN104683501A (en) * | 2015-03-30 | 2015-06-03 | 乐视致新电子科技（天津）有限公司 | Method and device for domain name resolution |
| CN105592176A (en) * | 2014-10-27 | 2016-05-18 | 中国移动通信集团公司 | Information processing method and system, and network equipment |
| CN106202397A (en) * | 2016-07-08 | 2016-12-07 | 合网络技术（北京）有限公司 | A kind of method of data synchronization and device |
| CN106210158A (en) * | 2015-05-04 | 2016-12-07 | 阿里巴巴集团控股有限公司 | The synchronous method of a kind of domain name mapping and equipment |
| WO2017000561A1 (en) * | 2015-07-01 | 2017-01-05 | 中兴通讯股份有限公司 | Domain name resource record caching control method and server |
| WO2017008659A1 (en) * | 2015-07-14 | 2017-01-19 | 阿里巴巴集团控股有限公司 | Domain name postfix obtaining method and apparatus |
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| CN106973125A (en) * | 2017-03-16 | 2017-07-21 | 中国联合网络通信集团有限公司 | Domain name mapping implementation method and device |
| CN107197057A (en) * | 2017-06-09 | 2017-09-22 | 中国联合网络通信集团有限公司 | DNS account book processing method and processing devices |
| CN107343056A (en) * | 2016-04-28 | 2017-11-10 | 阿弗里厄斯公共有限公司 | Domain name registration and management |
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| CN109040345A (en) * | 2018-09-30 | 2018-12-18 | 郑州冰川网络技术有限公司 | The parsing accelerated method and parsing accelerator of DNS cache |
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| CN115297085A (en) * | 2022-06-29 | 2022-11-04 | 北京奇艺世纪科技有限公司 | Domain name resolution updating method and device, electronic equipment and storage medium |
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| CN104506664A (en) * | 2014-11-24 | 2015-04-08 | 小米科技有限责任公司 | Domain name system caching method and device |
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| CN115297085A (en) * | 2022-06-29 | 2022-11-04 | 北京奇艺世纪科技有限公司 | Domain name resolution updating method and device, electronic equipment and storage medium |
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