CN101005371A - Caching method and system for stream medium - Google Patents
Caching method and system for stream medium Download PDFInfo
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- CN101005371A CN101005371A CNA2006100234688A CN200610023468A CN101005371A CN 101005371 A CN101005371 A CN 101005371A CN A2006100234688 A CNA2006100234688 A CN A2006100234688A CN 200610023468 A CN200610023468 A CN 200610023468A CN 101005371 A CN101005371 A CN 101005371A
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Abstract
The buffer system includes downloading module, service module, memory management module, and memory. Downloading stream media data from original server, the buffer system provides stream media data to client end. Not being connected to the original server, the service module through the downloading module is connected to the original server. The invention discloses buffering method in use for the said system. The invention also discloses a buffer system, which divides saved content into multiple clips, and saves content in clips. Each clip includes segment head of related information of saving the content of the clip, and content area of saving content data. A file head of recording current information is setup for multiple clips with intact content. It is needed to update file head and clip head when adding or deleting a clip. The invention discloses buffering method for the said buffer system.
Description
Technical field
The present invention relates to be used for the data communication network of distributing contents, more particularly, relate to a kind of caching method and system that is used for Streaming Media,
Background technology
Construction and development along with broadband internet, broadband network is popularized gradually, various application on broadband network emerge in an endless stream, quick growth along with the class of business and the traffic carrying capacity of telecommunications broadband services, what especially multimedia service was used enriches constantly, also bright and clear gradually as the development situation of " the CDN network " of service bearer network.Various places operator has built many CDN networks at present, significantly improved media user experience, improved service quality, but along with the intensification step by step of using, requirement for CDN is also more and more higher, how improving the performance and the optimization of CDN network itself, is the task of pendulum in face of present CDN networking person.
In the CDN network, mainly take the content CACHE of user's request is carried out work to the nearest website of distance users for the user provides the principle of service, therefore in realizing the CACHE flow process, content need be downloaded to fringe node from the original contents server earlier, and then provide service for the user.In this flow process, whether the content-data no matter user asks is complete at present, and CACHE equipment all can get off the local cache that downloads to all of original content, prepares service.In fact in the media business service process, the user often only watches a part of content, and such as the film of one 2 little duration, the user just browsed 5 minutes, has just no longer seen.Buffer memory full content data have just been brought serious waste like this, and the one, wasted a large amount of storages, preserved a large amount of invalid data.The 2nd, meaningless consumption the bandwidth of backbone network, in the beginning of these invalid datas of buffer memory, also need to download to this locality from original server.When downloading these invalid datas, also to take a large amount of network egress bandwidth and server resource consumption simultaneously, the media services that provided for the user at that time also are provided conversely.
Simultaneously under existing technical conditions, that provide service for the user and to download content from the original contents server be to carry out as two independent tasks, if a user need visit certain content, and this content does not exist on buffer memory, buffer memory equipment just needs to open two tasks so, one begins to download content from the original contents server, and be saved in this locality, another is to adopt proxy mode, obtain data flow from the original contents service, sending to client, such visit may cause buffer memory equipment to obtain stream to two data on the original contents server, has all brought bigger loss for the pressure and the network bandwidth of original server.
So, just need a kind of new caching method and system, to improve for utilization rate of network resource.
Summary of the invention
Method of the present invention provides a kind of new caching method and system, to improve for utilization rate of network resource.
According to a first aspect of the invention, provide a kind of caching system of Streaming Media, comprise download module, service module, memory management module and memory, described caching system is from original server download stream media data, and provides stream medium data to client,
Described download module is connected to described original server, when described caching system receives that the user asks from described original server download stream media data;
Described memory management module connects described download module, also connects described memory, when described download module during from described original server download stream media data, described stream medium data is saved on the described memory;
Described service module connects described download module and described memory management module, also connects described client,, described stream medium data is offered described client use for the user during from described original server download stream media data at described download module.
According to a second aspect of the invention, a kind of caching method of Streaming Media is provided, be used for comprising the system of download module, service module, memory management module and memory, this system is connected to original server and client, it is characterized in that, described service module does not directly link to each other with original server, but just is connected to original server by download module, and described method comprises the steps:
A1) described service module receives the access request of client, receives after user's the access request, at first analyzes the actual content of the request of client;
A2) whether service module exists on the memory in described system to the content-data of memory management module inquiring user request visit, if exist then directly use these data to provide service as the user;
A3) if the content of user's request does not exist on the memory of described system, service module is prepared the data of user access request to the download module application so, download module receives after the request of service module, is directly connected to original server and obtains content-data;
A4) after the download module obtains content-data, return to service module immediately, service module sends to client with these data again, finishes service to client is provided;
A5) when download module sends to service module with these data, also can notify memory management module, these content-datas that obtain are saved in described memory, memory module will be saved in these content-datas on the memory of described system like this.
According to a third aspect of the invention we, a kind of caching system of Streaming Media is provided, comprise download module, service module, memory management module and memory, described caching system is from original server download stream media data, and provide stream medium data to client, also comprise content analysis module, analyze for the content that is kept at the content in the described caching system or be used to ask;
Described download module is connected to described original server, be also connected to described content analysis module, from described original server download stream media data, described process of downloading is to carry out under the control of described content analysis module when described caching system receives that the user asks;
Described memory management module connects described download module, described memory and described content analysis module, when under the control of described download module in described content analysis module during from described original server download stream media data, described memory management module is saved in described stream medium data on the described memory, and the process of described preservation is carried out under the control of described content analysis module equally;
Described service module connects described download module, described memory management module and described content analysis module, also connect described client, under the control of described download module in described content analysis module during from described original server download stream media data, described stream medium data is offered described client use for the user, the process of described service is carried out under the control of described content analysis module equally.
In above-mentioned system, the content of preserving in the memory of described caching system is divided into a plurality of segments, and the branch segment is preserved, and each segment comprises the relevant information slice header and the content regions of preserving content-data of the content of in store this segment; A plurality of fragments of complete content are provided with file header record current information, and are newly-increased at every turn or when deleting a fragment, all need transaction file head and sheet broken end simultaneously.
In above-mentioned system, the described interior information of preserving of broken end comprises: segment content size, valid data size, described segment are in the relative address or the relative time of whole contents.
In above-mentioned system, described content analysis module comprises the content analysis that is kept at content in the described caching system or user request: when finding relevant content when the request of receiving the user and according to user's request, the data that analysis user is asked are in which segment in the described content.
According to a forth aspect of the invention, a kind of caching method of Streaming Media is provided, be used for comprising the system of download module, service module, memory management module and memory, this system is connected to original server and client, also comprise content analysis module, analyze for the content that is kept at the content in the described caching system or be used to ask, the running of described download module, service module, memory management module and memory is all carried out under the control of described content analysis module, and described method comprises the steps:
B1) described service module receives the access request of client, receives after user's the access request, at first analyzes the actual content of the request of client;
B2) whether service module exists on the memory in described system to the content-data of memory management module inquiring user request visit, if exist then directly use these data to provide service as the user;
B3) if the content of user's request does not exist on the memory of described system, service module is prepared the data of user access request to the download module application so, download module receives after the request of service module, is directly connected to original server and obtains content-data;
B4) described content analysis module is analyzed the content of user's request, and controls the downloading process of described download module;
B5) after the download module obtains content-data, return to service module immediately, service module sends to these data client again and finishes service to client is provided, and wherein, the service process of described service module is finished under the control of described content analysis module;
B6) when download module sends to service module with these data, also can notify memory management module, these content-datas that obtain are saved in described memory, memory module will be saved in these content-datas on the memory of described system like this, wherein, described memory management module is being saved in described content on the described memory under the control of described content control module.
In above-mentioned method, the content of preserving in the memory of described caching system is divided into a plurality of segments, and the branch segment is preserved, and each segment comprises the relevant information slice header and the content regions of preserving content-data of the content of in store this segment; A plurality of fragments of complete content are provided with file header record current information, and are newly-increased at every turn or when deleting a fragment, all need transaction file head and sheet broken end simultaneously.
In above-mentioned method, the described interior information of preserving of broken end comprises: segment content size, valid data size, described segment are in the relative address or the relative time of whole contents.
In above-mentioned method, described content analysis module comprises the content analysis of user's request: when finding relevant content when the request of receiving the user and according to user's request, the data that analysis user is asked are in which segment in the described content.
Adopt technical scheme of the present invention, can realize the buffer memory in the caching server while playing, caching server directly links to each other with original server when carrying out acting server, client only is connected with caching server, and and original server do not have direct relation, so each grade caching server of this mechanism can realize multistage agency the time carries out buffer memory simultaneously.Technical scheme of the present invention can also be divided into segment with content-data and preserve, when the user has only visited partial content, can only preserve that part of data of user capture, and need not preserve total data, so just save memory space, also reduced the network bandwidth consumption that content is downloaded.
Description of drawings
The above and other features of the present invention, character and advantage will become more obvious by the description below in conjunction with drawings and Examples, in the accompanying drawings, identical Reference numeral is represented identical feature all the time, wherein,
Fig. 1 is the structure chart of a kind of flow medium buffer of the prior art system;
Fig. 2 is the structure chart according to the flow medium buffer system of the first embodiment of the present invention;
Fig. 3 is according to a second embodiment of the present invention, is applied in the flow chart of a kind of caching method in the network configuration as shown in Figure 1;
Fig. 4 is the network structure of the flow medium buffer of a third embodiment in accordance with the invention;
Fig. 5 is an a fourth embodiment in accordance with the invention, is applied in the flow chart of a kind of caching method in the network configuration as shown in Figure 3.
Embodiment
Further specify technical scheme of the present invention below in conjunction with specific embodiment.
At first, the invention provides a kind of scheme that in caching server, realizes buffer memory while playing, when server provides agency service for the end user, need obtain service data from original server, and send to client, if caching server needs buffer memory simultaneously, caching server just can send to client with these data so, and then realizes that server is saved in this locality with data when acting as agent.Caching server directly links to each other with original server when carrying out acting server, client only is connected with caching server, and and original server do not have direct relation, so each grade caching server of this mechanism can realize multistage agency the time carries out buffer memory simultaneously.
For a person skilled in the art; the realization that need understand this scheme not merely depends on certain host-host protocol, as long as used the principle of should mechanism acting on behalf of simultaneously with buffer memory all to belong within the protection range of this patent in all application layer host-host protocols.
At first with reference to figure 1, the structure chart of the caching system 100 of a kind of Streaming Media that shown in Figure 1 is uses in the prior art.As described in Figure 1, a typical caching system 100 comprises three modules, download module 102, service module 104, memory management module 106 at least.Simultaneously, this system 100 is also connected to original server 108 and client 110.These system's 100 typical service procedures are as follows, 1) if server receives user's access request, just directly search memory management module, see whether the content that the user asks exists in the storage of this locality, if exist, service module just can use this content directly to send the data to the user.2) if there is no, service module directly uses the agency to provide service for this user, and directly connects original server and obtain the data of asking in the user capture, and sends to user side once more.3) content-data of notifying download module to begin the download user request simultaneously, and directly connect original server and obtain this data, in process of downloading, if the user asks data downloaded once more, service module continues to use agent way to provide service as the user.4) after the download module is finished download, the notice memory management module is downloaded and is finished, if service module is receiving user's information requested later on, will directly use this content that the service of hitting is provided.
Fig. 2 is the structure chart according to the flow medium buffer system of the first embodiment of the present invention.With reference to figure 2, it has disclosed a kind of caching system 200 of Streaming Media, comprise download module 202, service module 204, memory management module 206 and memory 212, caching system 200 is from original server 208 download stream media datas, and provide stream medium data to client 210, the feature of this system is:
As shown in Figure 2, after transforming, service module 202 no longer directly links to each other with original server 208, but just can be connected to original server 208 by download module 202, when a user access request is miss, two connections to original server can not appear, thus conserve network resources.
The present invention also provides a kind of caching method of Streaming Media, be used for comprising the system of download module, service module, memory management module and memory, this system is connected to original server and client, above shown in the system of Fig. 2 can use an example of the system of caching method of the present invention.In this system, service module does not directly link to each other with original server, but just is connected to original server by download module, and with reference to shown in Figure 3, described method comprises the steps:
301. service module receives the access request of client, receives after user's the access request, at first analyzes the actual content of the request of client;
302. whether service module exists on the memory in system to the content-data of memory management module inquiring user request visit, if exist then directly use these data to provide service as the user;
303. if the content of user's request does not exist on the memory of system, service module is prepared the data of user access request to the download module application so, download module receives after the request of service module, is directly connected to original server and obtains content-data;
304. obtain after the content-data when downloading module, return to service module immediately, service module sends to client with these data again, finishes service to client is provided;
305. when download module sends to service module with these data, also can notify memory management module, these content-datas that obtain are saved in described memory, memory module will be saved in these content-datas on the memory of system like this.
In addition, the present invention also provides a kind of scheme of partial buffering, so-called partial buffering is meant when buffer memory equipment carries out content caching, content-data can be divided into segment preserves, when the user had only visited partial content, buffer memory equipment can only be preserved that part of data of user capture, and need not preserve total data, so just save memory space, also reduced the network bandwidth consumption that content is downloaded.
Fig. 4 shows the caching system 400 of a kind of Streaming Media provided by the invention, it comprises download module 402, service module 404, memory management module 406 and memory 412, and caching system 400 is from original server 408 download stream media datas, and provides stream medium data to client 410, wherein
This system 400 also comprises content analysis module 414, analyzes for the content that is kept at the content in the caching system 400 or be used to ask;
Service module 406 connects download module 402, memory management module 404 and content analysis module 414, also connect client 410, at download module 402 under the control of content analysis module 414 during from original server 408 download stream media datas, stream medium data is offered client 410 use for the user, the process of service is carried out under the control of content analysis module 414 equally.
Wherein, the content of preserving in the memory of caching system of the present invention is divided into a plurality of segments, and the branch segment is preserved, and each segment comprises the relevant information slice header and the content regions of preserving content-data of the content of in store this segment; A plurality of fragments of complete content are provided with file header record current information, and are newly-increased at every turn or when deleting a fragment, all need transaction file head and sheet broken end simultaneously.The information of preserving in each sheet broken end comprises: segment content size, valid data size, described segment are in the relative address or the relative time of whole contents.
And, content analysis module comprises the content analysis that is kept at content in the caching system or user request: when finding relevant content when the request of receiving the user and according to user's request, the data that analysis user is asked are in which segment in the described content.
By above-mentioned processing, at first each content is divided into a plurality of segments and preserves, this each segment all has complete structure, comprise a slice header, the necessary information of the content of this in store this segment, comprise this segment content size, the valid data size is in information such as the relative address of whole contents or relative time.A plurality of fragments of whole contents also use certain form to preserve, and the file header that is provided with strictness writes down current information, each newly-increased or when deleting a fragment, all need transaction file head and sheet broken end simultaneously, such file or content have been divided into a plurality of segments, and organically have been kept on the disk.
The present invention also provides a kind of caching method of Streaming Media, be used to comprise download module, service module, in the system of memory management module and memory, this system is connected to original server and client, it is characterized in that, also comprise content analysis module, analyze for the content that is kept at the content in the described caching system or be used to ask, download module, service module, the running of memory management module and memory is all carried out under the control of content analysis module, an example using the system of flow medium buffer method of the present invention is top system as shown in Figure 4, with reference to shown in Figure 5, this method comprises the steps:
501. service module receives the access request of client, receives after user's the access request, at first analyzes the actual content of the request of client;
502. whether service module exists on the memory in described system to the content-data of memory management module inquiring user request visit, if exist then directly use these data to provide service as the user;
503. if the content of user's request does not exist on the memory of described system, service module is prepared the data of user access request to the download module application so, download module receives after the request of service module, is directly connected to original server and obtains content-data;
504. content analysis module is analyzed the content of user's request, and the downloading process of control download module;
505. obtain after the content-data when downloading module, return to service module immediately, service module sends to these data client again and finishes service to client is provided, and wherein, the service process of described service module is finished under the control of content analysis module;
506. when download module sends to service module with these data, also can notify memory management module, these content-datas that obtain are saved in described memory, memory module will be saved in these content-datas on the memory of system like this, wherein, memory management module is saved in content on the memory under the control of content control module.
In above-mentioned method, the content of preserving in the memory of caching system is divided into a plurality of segments, and the branch segment is preserved, and each segment comprises the relevant information slice header and the content regions of preserving content-data of the content of in store this segment; A plurality of fragments of complete content are provided with file header record current information, and are newly-increased at every turn or when deleting a fragment, all need transaction file head and sheet broken end simultaneously.And the information of preserving in each sheet broken end comprises: segment content size, valid data size, segment are in the relative address or the relative time of whole contents.
In the above-mentioned method, content analysis module comprises the content analysis of user's request: when finding relevant content when the request of receiving the user and according to user's request, the data that analysis user is asked are in which segment in the described content.
Adopt technical scheme of the present invention, can realize the buffer memory in the caching server while playing, caching server directly links to each other with original server when carrying out acting server, client only is connected with caching server, and and original server do not have direct relation, so each grade caching server of this mechanism can realize multistage agency the time carries out buffer memory simultaneously.Technical scheme of the present invention can also be divided into segment with content-data and preserve, when the user has only visited partial content, can only preserve that part of data of user capture, and need not preserve total data, so just save memory space, also reduced the network bandwidth consumption that content is downloaded.
The foregoing description provides to being familiar with the person in the art and realizes or use of the present invention; those skilled in the art 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 protection 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 caching system of a Streaming Media comprises download module, service module, memory management module and memory, and described caching system is from original server download stream media data, and provides stream medium data to client, it is characterized in that,
Described download module is connected to described original server, when described caching system receives that the user asks from described original server download stream media data;
Described memory management module connects described download module, also connects described memory, when described download module during from described original server download stream media data, described stream medium data is saved on the described memory;
Described service module connects described download module and described memory management module, also connects described client,, described stream medium data is offered described client use for the user during from described original server download stream media data at described download module.
2. the caching method of a Streaming Media, be used for comprising the system of download module, service module, memory management module and memory, this system is connected to original server and client, it is characterized in that, described service module does not directly link to each other with original server, but just being connected to original server by download module, described method comprises the steps:
A1) described service module receives the access request of client, receives after user's the access request, at first analyzes the actual content of the request of client;
A2) whether service module exists on the memory in described system to the content-data of memory management module inquiring user request visit, if exist then directly use these data to provide service as the user;
A3) if the content of user's request does not exist on the memory of described system, service module is prepared the data of user access request to the download module application so, download module receives after the request of service module, is directly connected to original server and obtains content-data;
A4) after the download module obtains content-data, return to service module immediately, service module sends to client with these data again, finishes service to client is provided;
A5) when download module sends to service module with these data, also can notify memory management module, these content-datas that obtain are saved in described memory, memory module will be saved in these content-datas on the memory of described system like this.
3. the caching system of a Streaming Media comprises download module, service module, memory management module and memory, and described caching system is from original server download stream media data, and provides stream medium data to client, it is characterized in that,
Also comprise content analysis module, analyze for the content that is kept at the content in the described caching system or be used to ask;
Described download module is connected to described original server, be also connected to described content analysis module, from described original server download stream media data, described process of downloading is to carry out under the control of described content analysis module when described caching system receives that the user asks;
Described memory management module connects described download module, described memory and described content analysis module, when under the control of described download module in described content analysis module during from described original server download stream media data, described memory management module is saved in described stream medium data on the described memory, and the process of described preservation is carried out under the control of described content analysis module equally;
Described service module connects described download module, described memory management module and described content analysis module, also connect described client, under the control of described download module in described content analysis module during from described original server download stream media data, described stream medium data is offered described client use for the user, the process of described service is carried out under the control of described content analysis module equally.
4. system as claimed in claim 3, it is characterized in that, the content of preserving in the memory of described caching system is divided into a plurality of segments, and the branch segment is preserved, and each segment comprises the relevant information slice header and the content regions of preserving content-data of the content of in store this segment; A plurality of fragments of complete content are provided with file header record current information, and are newly-increased at every turn or when deleting a fragment, all need transaction file head and sheet broken end simultaneously.
5. system as claimed in claim 4 is characterized in that, the described interior information of preserving of broken end comprises: segment content size, valid data size, described segment are in the relative address or the relative time of whole contents.
6. system as claimed in claim 5, it is characterized in that, described content analysis module comprises the content analysis that is kept at content in the described caching system or user request: when finding relevant content when the request of receiving the user and according to user's request, the data that analysis user is asked are in which segment in the described content.
7. the caching method of a Streaming Media, be used for comprising the system of download module, service module, memory management module and memory, this system is connected to original server and client, it is characterized in that, also comprise content analysis module, analyze for the content that is kept at the content in the described caching system or be used to ask, the running of described download module, service module, memory management module and memory is all carried out under the control of described content analysis module, and described method comprises the steps:
B1) described service module receives the access request of client, receives after user's the access request, at first analyzes the actual content of the request of client;
B2) whether service module exists on the memory in described system to the content-data of memory management module inquiring user request visit, if exist then directly use these data to provide service as the user;
B3) if the content of user's request does not exist on the memory of described system, service module is prepared the data of user access request to the download module application so, download module receives after the request of service module, is directly connected to original server and obtains content-data;
B4) described content analysis module is analyzed the content of user's request, and controls the downloading process of described download module;
B5) after the download module obtains content-data, return to service module immediately, service module sends to these data client again and finishes service to client is provided, and wherein, the service process of described service module is finished under the control of described content analysis module;
B6) when download module sends to service module with these data, also can notify memory management module, these content-datas that obtain are saved in described memory, memory module will be saved in these content-datas on the memory of described system like this, wherein, described memory management module is being saved in described content on the described memory under the control of described content control module.
8. method as claimed in claim 7, it is characterized in that, the content of preserving in the memory of described caching system is divided into a plurality of segments, and the branch segment is preserved, and each segment comprises the relevant information slice header and the content regions of preserving content-data of the content of in store this segment; A plurality of fragments of complete content are provided with file header record current information, and are newly-increased at every turn or when deleting a fragment, all need transaction file head and sheet broken end simultaneously.
9. method as claimed in claim 8 is characterized in that, the described interior information of preserving of broken end comprises: segment content size, valid data size, described segment are in the relative address or the relative time of whole contents.
10. method as claimed in claim 9, it is characterized in that, described content analysis module comprises the content analysis of user's request: when finding relevant content when the request of receiving the user and according to user's request, the data that analysis user is asked are in which segment in the described content.
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