CN104185036A - Video file source returning method and device - Google Patents
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- CN104185036A CN104185036A CN201410459350.4A CN201410459350A CN104185036A CN 104185036 A CN104185036 A CN 104185036A CN 201410459350 A CN201410459350 A CN 201410459350A CN 104185036 A CN104185036 A CN 104185036A
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Abstract
The embodiment of the invention discloses a video file source returning method and device. The video file source returning method comprises the steps that a video access request is received; the video access request is analyzed, a first video file corresponding to the video access request is determined; whether a downloading process of downloading the first video file from global storage nodes is started locally is detected when it is detected that the first video file is not locally stored; if yes, the downloading process of downloading the first video file from the global storage nodes is controlled to be not locally started any longer; if not, the downloading process of downloading the first video file from the global storage nodes is started. By the application of the technical scheme, the video file source returning method and device only need to start the downloading process of downloading the first video file from the global storage nodes once specific to multiple user requests for the same video file, it is unneeded that the global storage nodes are repeatedly requested to download the video file, the network flow expenditure can be reduced, and loads of marginal storage nodes and the global storage nodes are reduced.
Description
Technical field
The present invention relates to Online Video service technology field, the Internet, particularly a kind of video file returns source side method and device.
Background technology
Along with the high speed development of the Internet Online Video business, the video request program that the Internet Online Video service provider provides, direct broadcast service have become one of the most frequently used Internet service of users.As one of subsystem very crucial in the Internet Online Video service system, CDN (Content Delivery Network, content distributing network) system is at the distribution important role of video file.
In recent years, the number of users of the Internet Online Video service and the burst of number of videos increase, and have brought huge video distribution pressure to CDN system, and some video files cannot be synchronized on some the edge cache node in CDN system in time.Now, if to the above-mentioned video file of these edge cache node requests, this edge cache node can adopt the method for Hui Yuan to obtain corresponding video file from overall memory node, wherein, in above-mentioned overall memory node, stores above-mentioned video file.
Existing time source side method, for situation about initiating for a plurality of user's requests of same video file simultaneously, edge cache node can be to overall memory node, initiate a plurality of for asking the source request of returning of this video file, the above-mentioned a plurality of times source requests of this overall situation memory node response, repeatedly return to this video file to this edge cache node.
Yet, due to a plurality of user's requests for initiate for same video file simultaneously, edge cache node in this CDN system needs repeatedly to overall this video file of memory node request in this CDN system, network traffics expense is larger, and the edge cache node in this CDN system and the load of overall memory node are larger.
Summary of the invention
In order to address the above problem, the embodiment of the invention discloses a kind of video file and return source side method and device, concrete technical scheme is as follows:
Video file returns a source side method, is applied on the edge cache node in content distributing network CDN system, and described CDN system at least comprises: edge cache node and overall memory node, and described method comprises:
Receiver, video access request;
Described video access request is resolved, determine the first video file corresponding to described video access request;
Detecting locally do not store described the first video file in the situation that, detecting the local downloading process of downloading described the first video file from overall memory node that whether started;
If so, control the local downloading process of downloading described the first video file from overall memory node that again do not start;
Otherwise, start the downloading process of downloading described the first video file from described overall memory node.
Optionally, described method also comprises:
Whether detect described the first video file is the video segmentation of a complete video file;
In the situation that the video segmentation that described the first video file is a complete video file detected, start the downloading process of downloading other video segmentation of described complete video file from overall memory node;
The video segmentation of the described complete video file that download is obtained merges, and obtains complete video file.
Optionally, described overall memory node, comprising: first order overall situation memory node and second level overall situation memory node; The downloading process of described the first video file is downloaded in described startup from overall memory node, comprising:
To second level overall situation memory node request, download described the first video file;
Receive the feedback information of second level overall situation memory node, according to described feedback information, judge on the overall situation memory node of the described second level whether store described the first video file;
If so, start the downloading process of downloading described the first video file from described second level overall situation memory node;
Otherwise, start the downloading process of downloading described the first video file from first order overall situation memory node.
Optionally, described CDN system also comprises: dispatch server;
Described receiver, video access request, comprising:
The video access request that the user terminal that receiving scheduling server forwards sends.
Optionally, described method also comprises:
Described the first video file that download is obtained feeds back to described user terminal.
Optionally, described method also comprises:
Described the first video file that download is obtained stores this locality into.
Video file returns a source apparatus, is applied on the edge cache node in CDN system, and described CDN system at least comprises: edge cache node and overall memory node, and described device comprises:
Request receiving module, for receiver, video access request;
Request analysis module, resolves for the video access request that described request receiver module is received, and determines the first video file corresponding to described video access request;
First detection module, for detecting locally do not store described the first video file in the situation that, detects the local downloading process of downloading the first video file that described request parsing module is resolved to from overall memory node that whether started;
Control module, in the situation that the testing result of described first detection module is to be, controls the local downloading process of downloading described the first video file from overall memory node that again do not start;
First starts module, in the situation that the testing result of described first detection module is no, starts the downloading process of downloading described the first video file from described overall memory node.
Optionally, described device also comprises:
Whether the second detection module is the video segmentation of a complete video file for detection of described the first video file;
Second starts module, in the situation that the testing result of described the second detection module is to be, starts the downloading process of downloading other video segmentation of described complete video file from overall memory node;
Video merges module, for the video segmentation of described complete video file that download is obtained, merges, and obtains complete video file.
Optionally, described overall memory node, comprising: first order overall situation memory node and second level overall situation memory node;
Described first starts module, comprising:
Request submodule, for downloading described the first video file to second level overall situation memory node request;
Judgement submodule, for receiving the feedback information of second level overall situation memory node, and according to described feedback information, judges on the overall situation memory node of the described second level whether store described the first video file;
The first promoter module, in the situation that judgment result is that of described judgement submodule is to start the downloading process of downloading described the first video file from described second level overall situation memory node;
The second promoter module, in the situation that described judgement submodule the determination result is NO, start the downloading process of downloading described the first video file from first order overall situation memory node.
Optionally, described CDN system also comprises: dispatch server;
Described request receiver module, specifically for:
The video access request that the user terminal that receiving scheduling server forwards sends.
Optionally, described device also comprises:
Video feed module, feeds back to described user terminal for described the first video file that download is obtained.
Optionally, described device also comprises:
Video storage module, stores this locality into for described the first video file that download is obtained.
From such scheme, can find out, the video file that example of the present invention provides returns source side method and device, can after receiving video access request, this video access request be resolved, and determines the first corresponding video file; And detecting locally do not store the first video file in the situation that, continue to detect the local downloading process of downloading the first video file from overall memory node that whether started; In testing result, for be in the situation that, control the local downloading process of downloading the first video file from overall memory node that again do not start; In testing result, be no in the situation that, start the downloading process of downloading the first video file from described overall memory node.
Compared with prior art, a plurality of user's requests for same video file, the embodiment of the present invention only need start downloading process from this document to overall memory node that once download, without repeatedly downloading this video file to overall memory node request, thereby reduced network traffics expense, reduced the load of edge memory node and overall memory node.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
A kind of video file that Fig. 1 provides for the embodiment of the present invention returns the flow chart of source side method;
The exemplary plot of the CDN storage architecture that Fig. 2 provides for the embodiment of the present invention;
The flow chart of a kind of execution mode of S105 in Fig. 1 that Fig. 3 provides for the embodiment of the present invention;
The another kind of video file that Fig. 4 provides for the embodiment of the present invention returns the flow chart of source side method;
The another kind of video file that Fig. 5 provides for the embodiment of the present invention returns the flow chart of source side method;
A kind of video file that Fig. 6 provides for the embodiment of the present invention returns the structural representation of source apparatus;
The first a kind of structural representation that starts module 605 in Fig. 6 that Fig. 7 provides for the embodiment of the present invention;
The another kind of video file that Fig. 8 provides for the embodiment of the present invention returns the structural representation of source apparatus;
The another kind of video file that Fig. 9 provides for the embodiment of the present invention returns the structural representation of source apparatus.
Embodiment
In order to make those skilled in the art understand better the technical scheme in the present invention, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Along with the high speed development of the Internet Online Video business, the video request program that the Internet Online Video service provider provides, direct broadcast service have become one of the most frequently used Internet service of users.As one of subsystem very crucial in the Internet Online Video service system, CDN (Content Delivery Network, content distributing network) system is at the distribution important role of video file.In recent years, the number of users of the Internet Online Video service and the burst of number of videos increase, and have brought huge video distribution pressure to CDN system, and some video files cannot be synchronized on some the edge cache node in CDN system in time.Therefore, need to adopt the method for Hui Yuan that these video files are synchronized on above-mentioned edge cache node.
Yet existing video returns source side method and exists network traffics expense larger, and the problem such as node server load is large, in order to address the above problem, the embodiment of the present invention provides a kind of video file to return source side method and device.
First a kind of video file embodiment of the present invention being provided below returns source side method and is introduced.
It should be noted that, embodiment of the present invention method is applicable on the edge cache node in content distributing network CDN system, and described content distributing network CDN system at least comprises: edge cache node and overall memory node.
As shown in Figure 1, a kind of video file that the embodiment of the present invention provides returns source side method, can comprise:
S101, receiver, video access request.
The request of video access request in the embodiment of the present invention for obtaining video file for the edge cache node to content distributing network CDN system.
Optionally, the content distributing network CDN system in the embodiment of the present invention, can comprise: edge cache node, overall memory node and dispatch server;
At user terminal during to CDN system request video file, the video access request that described dispatch server can send user terminal, be transmitted to the edge cache node in consolidated network region with this user terminal, or the nearest edge cache node of Internet Transmission.Accordingly, in this CDN system, edge cache node can receive that this dispatch server forwards from the request of user terminal video access.
S102, resolves described video access request, determines the first video file corresponding to described video access request.
Such as, after receiving the video access request for film " transformer 4 " of external equipment transmission, edge cache node can carry out a series of parsing to this video access request, and then knows that the video file of external equipment request is " transformer 4 ".
Further, in embodiments of the present invention, described method can also comprise:
Detect this locality and whether store described the first video file;
In the situation that this locality being detected and storing described the first video file, directly this first video file is sent to the external equipment of this video file of request, such as the terminals such as smart mobile phone, panel computer are started to write.
S103, is detecting locally do not store the first video file in the situation that, detects the local downloading process of downloading the first video file from overall memory node that whether started; If so, forward S104 to, otherwise forward S105 to.
It should be noted that, " downloading process " described in the embodiment of the present invention is: from edge cache node to overall memory node, send video and return source request, to this overall situation memory node, successfully video file is returned to the process of this edge cache node.
S104, controls the local downloading process of downloading described the first video file from overall memory node that again do not start.
Concrete, in embodiments of the present invention, local startup from overall memory node is downloaded the downloading process of the first video file detected, can control this locality and to this overall situation memory node, not send and return source request for obtaining the video of this video file again.
Such as, terminal equipment is to this video file of edge cache node request that does not store video file 1, this edge cache node does not store after this video file this locality being detected, if this video file detected, be in download state, edge cache node returns source request without the video again sending for this video file to global buffer node.
S105, starts the downloading process of downloading described the first video file from described overall memory node.
Concrete, in embodiments of the present invention, local startup from overall memory node is downloaded the downloading process of the first video file detected, can send for obtaining the video of this video file and return source request to this overall situation memory node.
Further, in embodiments of the present invention, described method can also comprise:
After successfully downloading to described the first video file, described the first video file that download is obtained feeds back to user terminal.
From such scheme, can find out, the video file that example of the present invention provides returns source side method, can after receiving video access request, this video access request be resolved, and determines the first corresponding video file; And detecting locally do not store the first video file in the situation that, continue to detect the local downloading process of downloading the first video file from overall memory node that whether started; In testing result, for be in the situation that, control the local downloading process of downloading the first video file from overall memory node that again do not start; In testing result, be no in the situation that, start the downloading process of downloading the first video file from described overall memory node.
Compared with prior art, a plurality of user's requests for same video file, the embodiment of the present invention only need start downloading process from this document to overall memory node that once download, without repeatedly downloading this video file to overall memory node request, thereby reduced network traffics expense, reduced the load of edge memory node and overall memory node.
Optionally, in one embodiment of the invention, the overall memory node in the system of CDN shown in Fig. 2, can comprise: first order overall situation memory node and second level overall situation memory node;
As shown in Figure 3, above-mentioned S105, can comprise:
S105a, downloads described the first video file to second level overall situation memory node request.
It should be noted that, CND management by synchronization server in the system of CDN shown in Fig. 2 is carrying out video file when synchronous, first video file is synchronized to first order overall situation memory node, be then be synchronized to second level overall situation memory node, be finally to be synchronized to edge cache node.
Concrete, this edge cache node can adopt the mode directly sending request to second level overall situation memory node, asks to download described the first video file.
After receiving the request of edge cache node transmission, second level overall situation memory node can generate corresponding feedback information for the content receiving, and feeds back to edge cache node; Concrete, described feedback information carries and can reflect whether this overall situation memory node this locality, second level stores the information of the first video file.
S105b, the feedback information of reception second level overall situation memory node, judges on the overall situation memory node of the described second level whether store described the first video file according to described feedback information; If so, forward S105c to, otherwise forward S105d to.
S105c, starts the downloading process of downloading described the first video file from described second level overall situation memory node.
According to judged result, know that second level global buffer node stores after the first video file, can control this locality and directly to this second level overall situation memory node, send for obtaining the source request of returning of this video file, to trigger downloading process.
S105d, starts the downloading process of downloading described the first video file from first order overall situation memory node.
Because first order overall situation memory node stores nearly all video file, therefore according to judged result, know that this second level global buffer node does not store after the first video file, can control this locality directly sends for obtaining the source request of returning of this video file, to trigger downloading process to first order overall situation memory node.
Optionally, in one embodiment of the invention, the video file that the embodiment of the present invention provides returns source side method can also increase S106 on the basis of method shown in Fig. 1, S107 and S108.
It should be noted that, S106, S107, and S108 both can carry out according to the execution sequence of method shown in Fig. 4, also can adopt other execution sequence to carry out, the embodiment of the present invention is not construed as limiting this.To S106, S107 and S108 are described in detail below.
Whether S106, detecting described the first video file is the video segmentation of a complete video file.If so, carry out S107, otherwise do not deal with.
It should be noted that, user terminal, to the video file of edge cache node request, can be not only a complete video file, can be also a video segmentation of a complete video file.
S107, starts the downloading process of downloading other video segmentations of described complete video file from overall memory node.
Be understandable that, in the situation that described the first video file is a video segmentation of a complete video file, this user terminal also can be asked other video segmentations of this complete video file conventionally.
Based on above-mentioned consideration, can start the downloading process that overall memory node is downloaded other video segmentations of described complete video file simultaneously, and then obtain other video segmentations of this complete video file.
S108, the video segmentation of the described complete video file that download is obtained merges, and obtains complete video file.
Further, in merging, obtain after complete video file, this video file can be stored to this locality, to can respond fast the user terminal requests for this complete video file, and then by this complete video file reverse user terminal of feeding.
Optionally, in one embodiment of the invention, as shown in Figure 5, the video file that the embodiment of the present invention provides returns source side method can also increase S109 on the basis of method shown in Fig. 1, below S109 is described in detail.
S109, described the first video file that download is obtained stores this locality into.
For fear of edge cache node, repeatedly to the first video file described in overall memory node request, improve the response speed of edge cache node, and reduce the access pressure of overall memory node, the first object video file that download can be obtained stores this locality into.
Further, consider that edge cache node space utilisation and video upgrade the problems such as very fast, the video file that download can be obtained is only stored a period of time.Such as, for the lower video file of visit capacity, only stored 3 months.
Corresponding to the embodiment of the method shown in Fig. 1, the embodiment of the present invention also provides a kind of video file to return source apparatus.
As shown in Figure 6, a kind of video file that the embodiment of the present invention provides returns source apparatus, and described device can comprise:
Request receiving module 601, for receiver, video access request;
Request analysis module 602, resolves for the video access request that described request receiver module 601 is received, and determines the first video file corresponding to described video access request;
First detection module 603, for detecting locally do not store described the first video file in the situation that, detects the local downloading process of downloading the first video file that described request parsing module 602 is resolved to from overall memory node that whether started;
Control module 604, in the situation that the testing result of described first detection module 603 is to be, controls the local downloading process of downloading described the first video file from overall memory node that again do not start;
First starts module 605, in the situation that the testing result of described first detection module 603 is no, starts the downloading process of downloading described the first video file from described overall memory node.
As can be seen here, the video file that example of the present invention provides returns source apparatus, can after receiving video access request, this video access request be resolved, and determines the first corresponding video file; And detecting locally do not store the first video file in the situation that, continue to detect the local downloading process of downloading the first video file from overall memory node that whether started; In testing result, for be in the situation that, control the local downloading process of downloading the first video file from overall memory node that again do not start; In testing result, be no in the situation that, start the downloading process of downloading the first video file from described overall memory node.
Compared with prior art, a plurality of user's requests for same video file, the embodiment of the present invention only need start downloading process from this document to overall memory node that once download, without repeatedly downloading this video file to overall memory node request, thereby reduced network traffics expense, reduced the load of edge memory node and overall memory node.
Optionally, in one embodiment of the invention, the overall memory node in CDN system, can comprise: first order overall situation memory node and second level overall situation memory node as shown in Figure 2;
As shown in Figure 7, described first starts module 605, can comprise:
Request submodule 605a, for downloading described the first video file to second level overall situation memory node request;
Judgement submodule 605b, for receiving the feedback information of second level overall situation memory node, and according to described feedback information, judges on the overall situation memory node of the described second level whether store described the first video file;
The first promoter module 605c, in the situation that judgment result is that of described judgement submodule 605b is to start the downloading process of downloading described target video file from described second level overall situation memory node;
The second promoter module 605d, in the situation that described judgement submodule 605b the determination result is NO, start the downloading process of downloading described the first video file from first order overall situation memory node.
Optionally, in one embodiment of the invention, the video file that the embodiment of the present invention provides returns source apparatus can also increase the second detection module 606, the second startup modules 607 and video merging module 608 on the basis of Fig. 6 shown device.
It should be noted that, the second detection module 606, the second startup module 607 and video merge module 608 and both can connect according to the connected mode of Fig. 8 shown device, also can connect according to other connected mode, and the embodiment of the present invention is not construed as limiting this.Below the function of the second detection module 606, the second startup modules 607 and video merging module 608 is described in detail.
Whether the second detection module 606 is the video segmentation of a complete video file for detection of described the first video file;
Second starts module 607, in the situation that the testing result of described the second detection module 606 is to be, starts the downloading process of downloading other video segmentation of described complete video file from overall memory node;
Video merges module 608, for the video segmentation of described complete video file that download is obtained, merges, and obtains complete video file.
Optionally, in one embodiment of the invention, described CDN system can also comprise: dispatch server;
Described request receiver module 601, specifically for: the video access request that the user terminal that receiving scheduling server forwards sends.
Optionally, in one embodiment of the invention, described device also comprises:
Video feed module, feeds back to described user terminal for described the first video file that download is obtained.
Optionally, in one embodiment of the invention, as shown in Figure 9, the video file that the embodiment of the present invention provides returns source apparatus can also increase video storage module 609 on the basis of Fig. 6 shown device, below the function of video storage module 609 is described in detail.
Video storage module 609, stores this locality into for described the first video file that download is obtained.
For device embodiment, because it is substantially similar in appearance to embodiment of the method, so description is fairly simple, relevant part is referring to the part explanation of embodiment of the method.
While for convenience of description, describing above device, with function, being divided into various modules describes respectively.Certainly, when enforcement is of the present invention, the function of each module can be realized in same or a plurality of software and/or hardware.
It should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
Each embodiment in this specification all adopts relevant mode to describe, between each embodiment identical similar part mutually referring to, each embodiment stresses is the difference with other embodiment.Especially, for device embodiment, because it is substantially similar in appearance to embodiment of the method, so description is fairly simple, relevant part is referring to the part explanation of embodiment of the method.
One of ordinary skill in the art will appreciate that all or part of step realizing in said method execution mode is to come the hardware that instruction is relevant to complete by program, described program can be stored in computer read/write memory medium, here alleged storage medium, as: ROM/RAM, magnetic disc, CD etc.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.All any modifications of doing within the spirit and principles in the present invention, be equal to replacement, improvement etc., be all included in protection scope of the present invention.
Claims (12)
1. video file returns a source side method, is applied on the edge cache node in content distributing network CDN system, and described CDN system at least comprises: edge cache node and overall memory node, it is characterized in that, and described method comprises:
Receiver, video access request;
Described video access request is resolved, determine the first video file corresponding to described video access request;
Detecting locally do not store described the first video file in the situation that, detecting the local downloading process of downloading described the first video file from overall memory node that whether started;
If so, control the local downloading process of downloading described the first video file from overall memory node that again do not start;
Otherwise, start the downloading process of downloading described the first video file from described overall memory node.
2. method according to claim 1, is characterized in that, described method also comprises:
Whether detect described the first video file is the video segmentation of a complete video file;
In the situation that the video segmentation that described the first video file is a complete video file detected, start the downloading process of downloading other video segmentation of described complete video file from overall memory node;
The video segmentation of the described complete video file that download is obtained merges, and obtains complete video file.
3. method according to claim 1, is characterized in that, described overall memory node, comprising: first order overall situation memory node and second level overall situation memory node; The downloading process of described the first video file is downloaded in described startup from overall memory node, comprising:
To second level overall situation memory node request, download described the first video file;
Receive the feedback information of second level overall situation memory node, according to described feedback information, judge on the overall situation memory node of the described second level whether store described the first video file;
If so, start the downloading process of downloading described the first video file from described second level overall situation memory node;
Otherwise, start the downloading process of downloading described the first video file from first order overall situation memory node.
4. method according to claim 1, is characterized in that, described CDN system also comprises: dispatch server;
Described receiver, video access request, comprising:
The video access request that the user terminal that receiving scheduling server forwards sends.
5. method according to claim 4, is characterized in that, described method also comprises:
Described the first video file that download is obtained feeds back to described user terminal.
6. method according to claim 1, is characterized in that, described method also comprises:
Described the first video file that download is obtained stores this locality into.
7. video file returns a source apparatus, is applied on the edge cache node in CDN system, and described CDN system at least comprises: edge cache node and overall memory node, it is characterized in that, and described device comprises:
Request receiving module, for receiver, video access request;
Request analysis module, resolves for the video access request that described request receiver module is received, and determines the first video file corresponding to described video access request;
First detection module, for detecting locally do not store described the first video file in the situation that, detects the local downloading process of downloading the first video file that described request parsing module is resolved to from overall memory node that whether started;
Control module, in the situation that the testing result of described first detection module is to be, controls the local downloading process of downloading described the first video file from overall memory node that again do not start;
First starts module, in the situation that the testing result of described first detection module is no, starts the downloading process of downloading described the first video file from described overall memory node.
8. device according to claim 7, is characterized in that, described device also comprises:
Whether the second detection module is the video segmentation of a complete video file for detection of described the first video file;
Second starts module, in the situation that the testing result of described the second detection module is to be, starts the downloading process of downloading other video segmentation of described complete video file from overall memory node;
Video merges module, for the video segmentation of described complete video file that download is obtained, merges, and obtains complete video file.
9. device according to claim 7, is characterized in that, described overall memory node, comprising: first order overall situation memory node and second level overall situation memory node;
Described first starts module, comprising:
Request submodule, for downloading described the first video file to second level overall situation memory node request;
Judgement submodule, for receiving the feedback information of second level overall situation memory node, and according to described feedback information, judges on the overall situation memory node of the described second level whether store described the first video file;
The first promoter module, in the situation that judgment result is that of described judgement submodule is to start the downloading process of downloading described the first video file from described second level overall situation memory node;
The second promoter module, in the situation that described judgement submodule the determination result is NO, start the downloading process of downloading described the first video file from first order overall situation memory node.
10. device according to claim 7, is characterized in that, described CDN system also comprises: dispatch server;
Described request receiver module, specifically for:
The video access request that the user terminal that receiving scheduling server forwards sends.
11. devices according to claim 10, is characterized in that, described device also comprises:
Video feed module, feeds back to described user terminal for described the first video file that download is obtained.
12. devices according to claim 7, is characterized in that, described device also comprises:
Video storage module, stores this locality into for described the first video file that download is obtained.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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