CN102427412A - Zero-delay disaster recovery switching method and system of active standby source based on content distribution network - Google Patents
Zero-delay disaster recovery switching method and system of active standby source based on content distribution network Download PDFInfo
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Abstract
The invention discloses a zero-delay disaster recovery switching method and system of an active standby source based on a content distribution network, and the method and system can be used for enabling the disaster recovery switching to satisfy the seamless switching and reducing the loading pressure of a source station. The technical scheme provided by the invention is as follows: the method comprises the following steps of: carrying out a feedback source request on edge nodes of the content distribution network; monitoring and judging a feedback source server by a node source station and sending a request to a source server; carrying out different operations based on the state of a main source server; if the main source server is normal, responding the request and continually monitoring a node source station server; and if the main source server is abnormal, finishing the response of the request by a standby source server and carrying out the disaster recovery switching.
Description
Technical field
The present invention relates to the data calamity and be equipped with handoff technique, relate in particular to content distributing network (CDN) primary and secondary source calamity and be equipped with changing method and system.
Background technology
The basic thought that the primary and secondary source calamity of content-based distributing network is equipped with handoff technique is; When the main source of inserting the CDN network takes place when unusual; It is unusual that the CDN network edge node should be able in time detect main source; And launch source server connection fully, replace the request of main source server response CDN network edge node by being equipped with source server; Drop to the unusual influence that produces in main source minimum.
It is as shown in Figure 1 that present calamity is equipped with the implementation that switches, and saying of summary is exactly:
1. by the client monitoring URL in main source is provided, monitoring URL is the main foundation that is used to judge that the source station whether can normal access, and should guarantee can be by the mistake deletion action;
2.CDN the fringe node of network according to preset time value, at regular intervals, pulls monitoring URL file to the source station;
3. get nowhere when node pulls monitoring URL, counter adds 1; Otherwise, counter O reset;
4. when counter is preset value, node judges that the source station be unusually, gives the alarm, and launches calamity and be equipped with the source.
Existing calamity is equipped with implementation and has three drawbacks:
(1) needs the client to provide source station monitoring URL, and should guarantee and to delete.If monitoring URL is by the mistake deletion action, the CDN network edge node pulls less than monitoring URL file, judges that the source station is unusual repeatedly attempting pulling monitoring URL file failure back, launches calamity and is equipped with and switches;
(2) existing calamity is equipped with implementation, and node need pull the URL file one time to the source station at regular intervals according to preset time value, and the source station is produced load pressure.
(3) according to preset value,, the source station just can judge that the source station is unusual when the node continuous several times after pulling monitoring URL failure, launch source server fully; The handoff procedure that this calamity is equipped with; Do not satisfy seamless switching, judge the source station unusual during this period of time in, all are all failed to requests response of source station.
Summary of the invention
The objective of the invention is to address the above problem, provide a kind of zero propagation primary and secondary source calamity of content-based distributing network to be equipped with changing method, make calamity be equipped with switching and satisfy seamless switching, alleviate the load pressure of source station.
The object of the present invention is to provide a kind of zero propagation primary and secondary source calamity of content-based distributing network to be equipped with switched system, made calamity be equipped with switching and satisfy seamless switching, alleviated the load pressure of source station.
Technical scheme of the present invention is: the zero propagation primary and secondary source calamity that the present invention has disclosed a kind of content-based distributing network is equipped with changing method, comprising:
The content distributing network fringe node returns the source request;
Judge back source server by the monitoring of node source station, and send request to main source server;
State based on main source server carries out different operation: if main source server normally then responds this request and continues the monitoring of node source station, if main source server is then accomplished this request responding by being equipped with source server unusually, and carry out calamity and be equipped with and switch.
Be equipped with an embodiment of changing method according to the zero propagation primary and secondary source calamity of content-based distributing network of the present invention, the abnormality of main source server comprises that main source server produces exception response or main source server can't connect.
Be equipped with an embodiment of changing method according to the zero propagation primary and secondary source calamity of content-based distributing network of the present invention, calamity is equipped with that to switch be that the source of returning of revising the monitoring of node source station connects.
Be equipped with an embodiment of changing method according to the zero propagation primary and secondary source calamity of content-based distributing network of the present invention, this method also comprises, if main source server is unusual, sends the unusual alarm of main source server.
Be equipped with an embodiment of changing method according to the zero propagation primary and secondary source calamity of content-based distributing network of the present invention, the monitoring of node source station judges back that the step of main source server comprises:
Regularly survey main source server, count value is added 1 and whether judge count value less than threshold value,, otherwise switches back main source server, fail then with the count value zero clearing as if detection if then continue to survey less than threshold value if surveys successfully then.
The zero propagation primary and secondary source calamity that the present invention has also disclosed a kind of content-based distributing network is equipped with switched system, comprising:
Node returns the source request module, and the content distributing network fringe node sends back the source request;
Node source station monitoring module is judged back source server by the monitoring of node source station, and is sent request to main source server;
Calamity is equipped with handover module; State based on main source server carries out different operation: if main source server normally then responds this request and continues the monitoring of node source station; If main source server is then accomplished this request responding by being equipped with source server unusually, and carry out calamity switching fully.
Be equipped with an embodiment of switched system according to the zero propagation primary and secondary source calamity of content-based distributing network of the present invention, the abnormality of main source server comprises that main source server produces exception response or main source server can't connect.
Be equipped with an embodiment of switched system according to the zero propagation primary and secondary source calamity of content-based distributing network of the present invention, calamity is equipped with that to switch be that the source of returning of revising the monitoring of node source station connects.
Be equipped with an embodiment of switched system according to the zero propagation primary and secondary source calamity of content-based distributing network of the present invention, be equipped with in calamity and also comprise alarm unit in the handover module,, send the unusual alarm of main source server if main source server is unusual.
An embodiment who is equipped with switched system according to the zero propagation primary and secondary source calamity of content-based distributing network of the present invention; Node source station monitoring module carries out timing to main source server and surveys; If survey successfully then count value is added 1 and judge that whether count value is less than threshold value; If then continue to survey less than threshold value, otherwise switch back main source server, if survey failure then with the count value zero clearing.
The present invention contrasts prior art has following beneficial effect: inventive point of the present invention is:, timing is not carried out in the source station and pull monitoring URL when no abnormal in the source station, reduce the source station load pressure.When the source station takes place unusually, the CDN fringe node returns source request failure, when promptly the CDN fringe node is received the server exception response or connected less than the source; Node is accomplished four operations: the one, send request to being equipped with the source; Obtain response data, the 2nd, the notification source station administration person that gives the alarm, the 3rd, the source of returning of revising CDN node source station monitoring module connects; The 4th, start main source and attempt, realize that the seamless calamity of zero propagation is equipped with switching.The mode that attempt in main source is that according to Preset Time, at regular intervals, CDN network edge node structure one-time request is surveyed main source, if repeatedly survey successfully, then switches go back to main source; Calamity after the improvement is equipped with handoff technique, is asked main source is surveyed by CDN network edge node structure, abandons by the client monitoring URL being provided, and avoids because the wrong calamity that personnel's mistake deletion action causes is equipped with switching.Compared to prior art, when the main source of inserting the CDN network takes place when unusual, it is unusual that the CDN network edge node can in time detect main source, and launch fully that source server connects, and replaces the request of main source server response CDN network edge node by being equipped with source server; Drop to the unusual influence that produces in main source minimum.
Description of drawings
Fig. 1 shows the sketch map that traditional calamity is equipped with handover scheme.
The zero propagation primary and secondary source calamity that Fig. 2 shows content-based distributing network of the present invention is equipped with the flow chart of the embodiment of changing method.
Fig. 3 refinement the flow chart of source station of the present invention detection method.
The zero propagation primary and secondary source calamity that Fig. 4 shows content-based distributing network of the present invention is equipped with the schematic diagram of the embodiment of switched system.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further description.
The zero propagation primary and secondary source calamity of content-based distributing network is equipped with the embodiment of changing method
The zero propagation primary and secondary source calamity that Fig. 2 shows content-based distributing network of the present invention is equipped with the flow process of the embodiment of changing method.See also Fig. 2, the zero propagation primary and secondary source calamity of present embodiment is equipped with changing method and comprises following step.
Step S100: the content distributing network fringe node returns the source request.
Step S101: judge back source server by the monitoring of node source station, and send request to main source server.
Step S102: whether inspection source station server is normal.If normally then respond this request and turn back to step S100, if then get into step S103 unusually.
The monitoring of node source station judges back whether source server is normal; Its refinement is as shown in Figure 3, regularly surveys main source server (step S20), and successfully whether the inspection detection (step S21); If it is unsuccessful then with returning step S20 after the count value zero clearing, if success then gets into step S22.Then count value is added 1 and whether judge count value less than threshold value (step S22), if then continue to survey, get into step S20, if then switch back main source server more than or equal to threshold value less than threshold value.The abnormality of main source server comprises that main source server produces exception response or main source server can't connect.
Step S103: ask source server fully, before switching back main source server, accomplish this request responding, and carry out calamity switching fully by being equipped with source server.
Calamity is equipped with switching and is meant that the source of returning of revising the monitoring of node source station connects.In addition, also send the unusual alarm of main source server, notification source station administration person.
The zero propagation primary and secondary source calamity of content-based distributing network is equipped with the embodiment of switched system
The zero propagation primary and secondary source calamity that Fig. 4 shows content-based distributing network of the present invention is equipped with the principle of the embodiment of switched system.See also Fig. 4, the system of present embodiment comprises: node returns source request module 10, node source station monitoring module 12, calamity and is equipped with handover module 14.
Node returns in the source request module 10, and the content distributing network fringe node sends back the source request.
In the node source station monitoring module 12, judge back source server by the monitoring of node source station, and send request to main source server.The monitoring of node source station monitoring module 12 is main source server to be carried out timing survey; If survey successfully then count value is added 1 and judge that whether count value is less than threshold value; If then continue to survey less than threshold value, otherwise switch back main source server, if survey failure then with the count value zero clearing.
Calamity is equipped with in the handover module 14; State based on main source server carries out different operation: if main source server normally then responds this request and continues the monitoring of node source station; If main source server is then accomplished this request responding by being equipped with source server unusually, and carry out calamity switching fully.The abnormality of main source server comprises that main source server produces exception response or main source server can't connect.It is that the source of returning of revising the monitoring of node source station connects that calamity is equipped with that calamity in the handover module 14 be equipped with to switch, and the preferable alarm unit 140 that also comprises if main source server is unusual, is sent the unusual alarm of main source server.
The foregoing description provides to those of ordinary skills and realizes and use of the present invention; Those of ordinary skills can be under the situation that does not break away from invention thought of the present invention; The foregoing description is made various modifications or variation; Thereby invention scope of the present invention do not limit by the foregoing description, and should be the maximum magnitude that meets the inventive features that claims mention.
Claims (10)
1. the zero propagation primary and secondary source calamity of a content-based distributing network is equipped with changing method, comprising:
The content distributing network fringe node returns the source request;
Judge back source server by the monitoring of node source station, and send request to main source server;
State based on main source server carries out different operation: if main source server normally then responds this request and continues the monitoring of node source station, if main source server is then accomplished this request responding by being equipped with source server unusually, and carry out calamity and be equipped with and switch.
2. the zero propagation primary and secondary source calamity of content-based distributing network according to claim 1 is equipped with changing method, it is characterized in that, the abnormality of main source server comprises that main source server produces exception response or main source server can't connect.
3. the zero propagation primary and secondary source calamity of content-based distributing network according to claim 1 is equipped with changing method, it is characterized in that, it is that the source of returning of revising the monitoring of node source station connects that calamity is equipped with switching.
4. the zero propagation primary and secondary source calamity of content-based distributing network according to claim 1 is equipped with changing method, it is characterized in that, this method also comprises, if main source server is unusual, sends the unusual alarm of main source server.
5. the zero propagation primary and secondary source calamity of content-based distributing network according to claim 1 is equipped with changing method, it is characterized in that, the monitoring of node source station judges back that the step of main source server comprises:
Regularly survey main source server, count value is added 1 and whether judge count value less than threshold value,, otherwise switches back main source server, fail then with the count value zero clearing as if detection if then continue to survey less than threshold value if surveys successfully then.
6. the zero propagation primary and secondary source calamity of a content-based distributing network is equipped with switched system, comprising:
Node returns the source request module, and the content distributing network fringe node sends back the source request;
Node source station monitoring module is judged back source server by the monitoring of node source station, and is sent request to source server;
Calamity is equipped with handover module; State based on main source server carries out different operation: if main source server normally then responds this request and continues the monitoring of node source station; If main source server is then accomplished this request responding by being equipped with source server unusually, and carry out calamity switching fully.
7. the zero propagation primary and secondary source calamity of content-based distributing network according to claim 6 is equipped with switched system, it is characterized in that, the abnormality of main source server comprises that main source server produces exception response or main source server can't connect.
8. the zero propagation primary and secondary source calamity of content-based distributing network according to claim 6 is equipped with switched system, it is characterized in that, it is that the source of returning of revising the monitoring of node source station connects that calamity is equipped with switching.
9. the zero propagation primary and secondary source calamity of content-based distributing network according to claim 6 is equipped with switched system, it is characterized in that, is equipped with in calamity and also comprises alarm unit in the handover module, if main source server is unusual, sends the unusual alarm of main source server.
10. the zero propagation primary and secondary source calamity of content-based distributing network according to claim 6 is equipped with switched system; It is characterized in that; Node source station monitoring module carries out timing to main source server to be surveyed, if surveys successfully then count value is added 1 and whether judge count value less than threshold value, as if then continue detection less than threshold value; Otherwise switch back main source server, if survey failure then with the count value zero clearing.
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Application publication date: 20120425 |