CN109151512A - The method and device of content is obtained in CDN network - Google Patents
The method and device of content is obtained in CDN network Download PDFInfo
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- CN109151512A CN109151512A CN201811064319.5A CN201811064319A CN109151512A CN 109151512 A CN109151512 A CN 109151512A CN 201811064319 A CN201811064319 A CN 201811064319A CN 109151512 A CN109151512 A CN 109151512A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/239—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests
- H04N21/2393—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests involving handling client requests
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
- H04N21/2405—Monitoring of the internal components or processes of the server, e.g. server load
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
- H04N21/64723—Monitoring of network processes or resources, e.g. monitoring of network load
Abstract
The application provides the method and device that content is obtained in a kind of CDN network, is related to the communications field, for obtaining content from CDN network.This method comprises: first edge CDN server receives the access request of terminal, object content is carried in the storage address of first edge CDN server in access request.If the current load of first edge CDN server is more than pre-determined threshold, first edge CDN server sends redirection information to terminal, which is used to indicate terminal and initiates access request to second edge CDN server；Second edge CDN server is the edge C DN server that load condition meets preset condition in CDN network.Object content is sent to second edge CDN server by first edge CDN server.Therefore, the method that content is obtained in CDN network provided by the present application solves the problems, such as that the consumption of the backbone bandwidth between edge C DN network and center CDN network is excessive.
Description
Technical field
This application involves the method and devices that content is obtained in field of communication technology more particularly to a kind of CDN network.
Background technique
It is more generally for storage in traditional content distributing network (Content Delivery Network, CDN)
Content source, need to dispose a large amount of edge C DN server in CDN network.In addition, in order to guarantee in edge C DN server
Content is consistent with the content in the CDN server of center, and general piece of content is only stored on an edge C DN server.
When the not stored content for thering is terminal to need to access on edge C DN server, need edge C DN server from center
CDN server obtains the content, when the request amount of same content is excessive, can largely consume edge C DN server and center CDN
Expensive backbone bandwidth between server.
Summary of the invention
The embodiment of the present application provides the method and device that content is obtained in a kind of CDN network, can reduce edge C DN service
The consumption of backbone bandwidth among device and center CDN server.
In order to achieve the above objectives, the application adopts the following technical scheme that
In a first aspect, this application provides a kind of methods that content is obtained in CDN network, this method comprises:
The access request of first edge CDN server reception terminal；The first edge is carried in the access request
In the storage address of first edge CDN server, the access request is used for from described for the address of CDN server and object content
First edge CDN server obtains object content；If the current load of the first edge CDN server is more than pre-determined threshold,
Then the first edge CDN server sends redirection information to the terminal；Wherein, the redirection information is used to indicate institute
It states terminal and initiates access request to second edge CDN server；The second edge CDN server is to bear in the CDN network
Load state meets the edge C DN server of preset condition；The object content is sent to institute by the first edge CDN server
State second edge CDN server.
Second aspect, this application provides the methods that content is obtained in another CDN network, this method comprises: the second side
The access request of edge CDN server reception terminal；The access request is used to obtain in target from second edge CDN server
Hold；It include: the mark and mesh of the address of the second edge CDN server, first edge CDN server in the access request
Content is marked in the storage address of first edge CDN server；The second edge CDN server is according in the access request
The mark of the first edge CDN server obtains the object content from the first edge CDN server；Second side
The object content is sent to the terminal by edge CDN server.
The third aspect, this application provides the devices that content is obtained in a kind of CDN network, which includes: receiving module,
For receiving the access request of terminal；Address and the target of the first edge CDN server are carried in the access request
Content is in the storage address of first edge CDN server, and the access request from the first edge CDN server for obtaining
Object content.Sending module, if the load current for the first edge CDN server is more than pre-determined threshold, to described
Terminal sends redirection information；Wherein, the redirection information is used to indicate the terminal and initiates to second edge CDN server
Access request；The second edge CDN server is the edge C DN clothes that load condition meets preset condition in the CDN network
Business device.The sending module is also used to the object content and is sent to the second edge CDN server.
Fourth aspect, this application provides the devices that content is obtained in another CDN network, which includes: reception mould
Block, for receiving the access request of terminal；The access request is used to obtain object content from second edge CDN server；Institute
State includes: the address of the second edge CDN server in access request, in the mark and target of first edge CDN server
Hold the storage address in first edge CDN server.Processing module, for according to the first edge in the access request
The mark of CDN server obtains the object content from the first edge CDN server.Sending module is used for the mesh
Mark content is sent to the terminal.
The method and device that content is obtained in CDN network provided by the present application, in the load of first edge CDN server
When big, the access request of terminal is redirected to second edge CDN server by first edge CDN server, and terminal is according to resetting
Access request is sent to information to second edge CDN server, and second edge CDN server is according to the redirection information from the
One edge CDN server obtains object content, and terminal obtains the object content from second edge CDN server.With existing skill
Terminal is needed directly to obtain object content from center CDN server and be compared in art, and the technical solution of the application can reduce edge
The consumption of backbone bandwidth between CDN server and center CDN server.
Detailed description of the invention
Fig. 1 is a kind of network architecture diagram of CDN network provided by the embodiments of the present application；
Fig. 2 is the flow chart that the method for content is obtained in a kind of CDN network provided by the embodiments of the present application；
Fig. 3 is in obtaining in a kind of CDN network applied in first edge CDN server provided by the embodiments of the present application
The structural schematic diagram of the device of appearance；
Fig. 4 is to obtain in another CDN network being applied in first edge CDN server provided by the embodiments of the present application
The structural schematic diagram of the device of content；
Fig. 5 is in obtaining in a kind of CDN network applied in second edge CDN server provided by the embodiments of the present application
The structural schematic diagram of the device of appearance；
Fig. 6 is to obtain in another CDN network being applied in first edge CDN server provided by the embodiments of the present application
The structural schematic diagram of the device of content；
Fig. 7 is to obtain in another CDN network being applied in second edge CDN server provided by the embodiments of the present application
The structural schematic diagram of the device of content.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, detailed retouch is carried out to method and device provided by the present application
It states.
Term " first " and " second " in the description of the present application and attached drawing etc. be for distinguishing different objects, and
It is not intended to the particular order of description object.
In addition, the term " includes " being previously mentioned in the description of the present application and " having " and their any deformation, it is intended that
It is to cover and non-exclusive includes.Such as the process, method, system, product or equipment for containing a series of steps or units do not have
It is defined in listed step or unit, but optionally further comprising the step of other are not listed or unit, or optionally
It further include other step or units intrinsic for these process, methods, product or equipment.
It should be noted that in the embodiment of the present application, " illustrative " or " such as " etc. words make example, example for indicating
Card or explanation.Be described as in the embodiment of the present application " illustrative " or " such as " any embodiment or design scheme do not answer
It is interpreted than other embodiments or design scheme more preferably or more advantage.Specifically, " illustrative " or " example are used
Such as " word is intended to that related notion is presented in specific ways.
In the description of the present application, unless otherwise indicated, the meaning of " plurality " is refer to two or more.
Fig. 1 is the network structure of CDN.As shown in Figure 1, including center CDN server 101 and at least in the CDN network
Two edge C DN servers 102.Wherein, full content is stored in center CDN server 101, center CDN server 101 will
The full content of itself is respectively stored into all edge C DN servers 102 in CDN network.Each edge C DN server
The partial content being stored in 102 in center CDN server 101.
Currently, terminal obtains the mode of the content in CDN network are as follows: when terminal request access target content, according to clothes
The regular terminal of business device load balancing (Server Load Balancer, SLB) will be serviced from the edge C DN for being stored with object content
Device obtains content.When edge C DN server because terminal is direct when load is more than that the reasons such as thresholding can not provide service for terminal
Access request is sent to center CDN server, and obtains object content from center CDN server.
The embodiment of the present application provides a kind of method that content is obtained in CDN network, is applied in CDN network shown in FIG. 1.
As shown in Fig. 2, the method includes S201-S207:
S201, first edge CDN server receive the access request of terminal.
Wherein, the address for the first edge CDN server being carried in the access request and object content are first
The storage address of edge C DN server, the access request are used to obtain object content from the first edge CDN server.
Illustratively, when terminal needs access target content, it is corresponding that the terminal obtains the object content for needing to access
Uniform resource locator (Uniform Resource Locator, URL).Wherein, the URL is directed toward the object content and exists
Storage location in first edge CDN server.The URL is sent in the first edge CDN server by terminal.
Illustratively, the URL are as follows:
Http:// cdn1/xxx/xxx? parameter=value1¶meter2=value2 ....
S202, first edge CDN server judge whether own load is more than pre-determined threshold.
Optionally, terminal quantity, central processing unit (Central of the first edge CDN server according to own services
Processing Unit, CPU), the indexs such as memory preset itself load-threshold.When first edge CDN server receives
When to new content access request, first edge CDN server judges whether own load reaches pre-determined threshold.
For example, the load-threshold can be indicated with the terminal quantity of the first edge CDN server current service.
If first edge CDN server at most allows while servicing 1000 terminals, in order to make first edge CDN server preferable
Performance state under work, 800 can be set by load-threshold value.When the 801st terminal sends access request, the first side
Edge CDN server judges that own load is more than default load-threshold.
For another example, the load-threshold can be indicated with the utilization rate of CPU or memory usage.Such as when CPU is utilized
When rate reaches 80% or when memory usage reaches 80%, first edge CDN server judges that own load is more than preset negative
Carry thresholding.The default load-threshold can indicate that the embodiment of the present application does not limit this by a variety of data.
If the current load of S203, the first edge CDN server is more than pre-determined threshold, the first edge CDN
Server sends redirection information to the terminal.
Wherein, the redirection information is used to indicate the terminal and initiates access request to second edge CDN server；Institute
Stating second edge CDN server is the edge C DN server that load condition meets preset condition in the CDN network.
Specifically, the first edge CDN server obtains the negative of all edge C DN servers in the CDN network
Load state selects the edge C DN server for meeting preset condition as second edge CDN server.Illustratively, the satisfaction
The edge C DN server of preset condition, which can be, loads minimum edge C DN server in the CDN network, be also possible to institute
State other edge Cs DN for being less than pre-determined distance lower than default load value in CDN network and at a distance from first edge CDN server
Server, as loaded lower and nearest apart from first edge CDN server other edge Cs DN server in CDN network.
The first edge CDN server obtains the address of the second edge CDN server；The first edge CDN
The address of first edge CDN server in access request that terminal is sent is replaced with second edge CDN server by server
Address；And the mark of the first edge CDN server is added in the access request and generates redirection information,
In, the mark of the first edge CDN server is for indicating that the object content is stored in the first edge CDN server
In.
Optionally, the redirection information is implemented as URL.Illustratively, the received access in step S201
Include the corresponding URL of object content in request, includes the address of first edge CDN server in the URL, basis should in this step
The new URL that URL is generated are as follows:
Http:// cdn2/xxx/xxx? parameter=value1¶meter2=value2&relocate=
Cdn1ip (port)=value.
The redirection information is sent to the terminal by S204, first edge CDN server.
S205, the terminal send access request to the second edge CDN server according to the redirection information.
Specifically, identifying the second side for including in redirection information after the terminal obtains the redirection information
Redirection information is sent to second edge CDN server and requested access in target by the address of edge CDN server, the terminal
Hold.
S206, the second edge CDN server are according to the first edge CDN server in the access request
Mark and object content obtain the mesh from the first edge CDN server in the storage address of first edge CDN server
Mark content.
Specifically, second edge CDN server receives the redirection information in the access request of terminal transmission.It is described heavy
Include in directed information first edge CDN server mark and object content first edge CDN server storage
Location.The second edge CDN server is according to the mark and object content of the first edge CDN server in first edge
The storage address of CDN server obtains the object content from the first edge CDN server.
The object content is sent to the terminal by S207, second edge CDN server.
Optionally, second edge CDN server stores the object content after obtaining the object content, has end when subsequent
When end requests access to the object content, terminal can be accessed directly from second edge CDN server and obtain object content.
The method that content is obtained in CDN network provided by the present application, terminal is into first edge CDN server request target
Hold, when the load of first edge CDN server is more than default load-threshold, first edge CDN server generates redirection information,
Redirection information is returned into terminal, redirection information is sent to second edge CDN server, second edge CDN clothes by terminal
Business device obtains object content to first edge CDN server according to redirection information and returns to terminal.Therefore, the application provides
CDN network in obtain content method can be avoided first edge CDN server load be more than pre-determined threshold when terminal it is direct
Object content is obtained to center CDN server, is reduced expensive between edge C DN server and center CDN server
The consumption of backbone bandwidth.
As shown in figure 3, the embodiment of the present application provides the device for obtaining content in a kind of CDN network, described device is applied to
First edge CDN server, for executing the method for obtaining content in aforementioned CDN network, described device includes:
Receiving module 301, for receiving the access request of terminal；The first edge is carried in the access request
In the storage address of first edge CDN server, the access request is used for from described for the address of CDN server and object content
First edge CDN server obtains object content.
Sending module 302, if the load current for the first edge CDN server is more than pre-determined threshold, to institute
It states terminal and sends redirection information；Wherein, the redirection information is used to indicate the terminal and sends out to second edge CDN server
Play access request；The second edge CDN server is the edge C DN that load condition meets preset condition in the CDN network
Server.
The sending module 302 is also used to for the object content to be sent to the second edge CDN server.
Optionally, in conjunction with Fig. 3, as shown in figure 4, device provided by the embodiments of the present application can also include processing module 401.
The receiving module 301 is also used to obtain the address of the second edge CDN server.
The processing module 401, for replacing the address of the first edge CDN server in the access request
For the second edge CDN server address and increase the mark of the first edge CDN server to generate described reset
To information, the mark of the first edge CDN server is for indicating that the object content is stored in the first edge CDN clothes
It is engaged in device.
Optionally, receiving module 301 are also used to receive the content request message of the second edge CDN server, described
Content request message is used to obtain the object content from the first edge CDN server.The processing module 401, is also used
In in response to the content request message, the object content is sent to the second edge CDN server.
As shown in figure 5, the embodiment of the present application provides the device for obtaining content in another CDN network, described device application
In second edge CDN server, for executing the method for obtaining content in aforementioned CDN network, described device includes:
Receiving module 501, for receiving the access request of terminal；The access request is used for from second edge CDN service
Device obtains object content；It include: address, the first edge CDN service of the second edge CDN server in the access request
The storage address of the mark of device and object content in first edge CDN server.
Processing module 502, for according to the mark of the first edge CDN server in the access request from described
First edge CDN server obtains the object content.
Sending module 503, for the object content to be sent to the terminal.
Optionally, processing module 502 are also used to store the object content, ask in order to receive terminal access again
The object content directly is obtained from the second edge CDN server when asking.
Fig. 6 shows another possible knot that the device of content is obtained in CDN network involved in above-described embodiment
Structure schematic diagram, described device are applied in first edge CDN server.The device includes: processor 602 and communication interface 603.
Processor 602 is for carrying out control management to the movement of device, for example, the step of above-mentioned processing module 401 executes is executed, and/
Or other processes for executing techniques described herein.Communication interface 603 is for supporting the device and other network entities
Communication, for example, executing the step of above-mentioned receiving module 301 and sending module 302 execute.Terminal can also include memory
601 and bus 604, memory 601 is used for the program code and data of storage device.
Wherein, above-mentioned processor 602 may be implemented or execute various exemplary in conjunction with described in present disclosure
Logic block, unit and circuit.The processor can be central processing unit, general processor, and digital signal processor is dedicated
Integrated circuit, field programmable gate array or other programmable logic device, transistor logic, hardware component or its
Any combination.It, which may be implemented or executes, combines various illustrative logic blocks described in present disclosure, unit
And circuit.The processor is also possible to realize the combination of computing function, such as combines comprising one or more microprocessors,
DSP and the combination of microprocessor etc..
Memory 601 may include volatile memory, such as random access memory；The memory also may include non-
Volatile memory, such as read-only memory, flash memory, hard disk or solid state hard disk；The memory can also include above-mentioned
The combination of the memory of type.
Bus 604 can be expanding the industrial standard structure (Extended Industry Standard
Architecture, EISA) bus etc..Bus 604 can be divided into address bus, data/address bus, control bus etc..For convenient for table
Show, only indicated with a thick line in Fig. 6, it is not intended that an only bus or a type of bus.
Fig. 7 shows another possible knot that the device of content is obtained in CDN network involved in above-described embodiment
Structure schematic diagram, described device are applied in second edge CDN server.The device includes: processor 702 and communication interface 703.
Processor 702 is for carrying out control management to the movement of device, for example, the step of above-mentioned processing module 502 executes is executed, and/
Or other processes for executing techniques described herein.Communication interface 703 is for supporting the device and other network entities
Communication, for example, executing the step of above-mentioned receiving module 501 and sending module 503 execute.Terminal can also include memory
701 and bus 704, memory 701 is used for the program code and data of storage device.
Wherein, above-mentioned processor 702 may be implemented or execute various exemplary in conjunction with described in present disclosure
Logic block, unit and circuit.The processor can be central processing unit, general processor, and digital signal processor is dedicated
Integrated circuit, field programmable gate array or other programmable logic device, transistor logic, hardware component or its
Any combination.It, which may be implemented or executes, combines various illustrative logic blocks described in present disclosure, unit
And circuit.The processor is also possible to realize the combination of computing function, such as combines comprising one or more microprocessors,
DSP and the combination of microprocessor etc..
Memory 701 may include volatile memory, such as random access memory；The memory also may include non-
Volatile memory, such as read-only memory, flash memory, hard disk or solid state hard disk；The memory can also include above-mentioned
The combination of the memory of type.
Bus 704 can be expanding the industrial standard structure (Extended Industry Standard
Architecture, EISA) bus etc..Bus 704 can be divided into address bus, data/address bus, control bus etc..For convenient for table
Show, only indicated with a thick line in Fig. 7, it is not intended that an only bus or a type of bus.
Through the above description of the embodiments, it is apparent to those skilled in the art that, for description
It is convenienct and succinct, only with the division progress of above-mentioned each functional unit for example, in practical application, can according to need and will be upper
It states function distribution to be completed by different functional units, i.e., the internal structure of device is divided into different functional units, to complete
All or part of function described above.The specific work process of the system, apparatus, and unit of foregoing description, before can referring to
The corresponding process in embodiment of the method is stated, details are not described herein.
The embodiment of the present application also provides a kind of computer readable storage medium, and finger is stored in computer readable storage medium
It enables, when computer executes the instruction, which executes first edge CDN in method flow shown in above method embodiment
Each step that server or second edge CDN server execute.
Wherein, computer readable storage medium, such as electricity, magnetic, optical, electromagnetic, infrared ray can be but not limited to or partly led
System, device or the device of body, or any above combination.The more specific example of computer readable storage medium is (non-poor
The list of act) it include: the electrical connection with one or more conducting wires, portable computer diskette, hard disk.Random access memory
(Random Access Memory, RAM), read-only memory (Read-Only Memory, ROM), erasable type may be programmed read-only
It is memory (Erasable Programmable Read Only Memory, EPROM), register, hard disk, optical fiber, portable
Compact disc read-only memory (Compact Disc Read-Only Memory, CD-ROM), light storage device, magnetic memory
Part or above-mentioned people are in appropriate combination or the computer readable storage medium of any other form of this field numerical value.
A kind of illustrative storage medium is coupled to processor, to enable a processor to from the read information, and can be to
Information is written in the storage medium.Certainly, storage medium is also possible to the component part of processor.Pocessor and storage media can be with
In application-specific IC (Application Specific Integrated Circuit, ASIC).In the application
In embodiment, computer readable storage medium can be any tangible medium for including or store program, which can be referred to
Enable execution system, device or device use or in connection.
The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any
Change or replacement within the technical scope of the present application should all be covered within the scope of protection of this application.
Claims (10)
1. obtaining the method for content in a kind of CDN network, which is characterized in that be applied in CDN network, the CDN network includes
At least two edges CDN server；The described method includes:
The access request of first edge CDN server reception terminal；The first edge CDN clothes are carried in the access request
Be engaged in device address and object content in the storage address of first edge CDN server, the access request is used for from described first
Edge C DN server obtains object content；
If the current load of the first edge CDN server is more than pre-determined threshold, the first edge CDN server is to institute
It states terminal and sends redirection information；Wherein, the redirection information is used to indicate the terminal and sends out to second edge CDN server
Play access request；The second edge CDN server is the edge C DN that load condition meets preset condition in the CDN network
Server；
The object content is sent to the second edge CDN server by the first edge CDN server.
2. obtaining the method for content in CDN network according to claim 1, which is characterized in that in the first edge CDN
Before server sends redirection information to the terminal, the method also includes:
The first edge CDN server obtains the address of the second edge CDN server；
The first edge CDN server replaces with the address of the first edge CDN server in the access request
The address of the second edge CDN server simultaneously increases the mark of the first edge CDN server to generate the redirection
Information, the mark of the first edge CDN server is for indicating that the object content is stored in the first edge CDN service
In device.
3. obtaining the method for content in CDN network according to claim 2, which is characterized in that the first edge CDN clothes
The object content is sent to the second edge CDN server by business device, comprising:
The first edge CDN server receives the content request message of the second edge CDN server, the content requests
Message obtains the object content from the first edge CDN server for requesting；
In response to the content request message, the first edge CDN server sends institute to the second edge CDN server
State object content.
4. obtaining the method for content in a kind of CDN network, which is characterized in that be applied in CDN network, the CDN network includes
At least two edges CDN server；The described method includes:
The access request of second edge CDN server reception terminal；The access request is used for from the second edge CDN service
Device obtains object content；It include: address, the first edge CDN service of the second edge CDN server in the access request
The storage address of the mark of device and object content in first edge CDN server；
The second edge CDN server is according to the mark of the first edge CDN server in the access request from institute
It states first edge CDN server and obtains the object content；
The object content is sent to the terminal by the second edge CDN server.
5. obtaining the method for content in CDN network according to claim 4, which is characterized in that in the second edge CDN
Server is according to the mark of the first edge CDN server in the access request from the first edge CDN server
After obtaining the object content, the method also includes:
The second edge CDN server stores the object content, in order to when receiving the access request of terminal again
Directly the object content is obtained from the second edge CDN server.
6. obtaining the device of content in a kind of CDN network, which is characterized in that be applied in CDN network, the CDN network includes
At least two edges CDN server；Described device is applied to first edge CDN server, and described device includes:
Receiving module, for receiving the access request of terminal；The first edge CDN server is carried in the access request
Address and object content in the storage address of first edge CDN server, the access request is used for from the first edge
CDN server obtains object content；
Sending module is sent out if the load current for the first edge CDN server is more than pre-determined threshold to the terminal
Send redirection information；Wherein, the redirection information is used to indicate the terminal and asks to the initiation access of second edge CDN server
It asks；The second edge CDN server is the edge C DN server that load condition meets preset condition in the CDN network；
The sending module is also used to for the object content to be sent to the second edge CDN server.
7. obtaining the device of content in CDN network according to claim 6, which is characterized in that described device further include:
The receiving module is also used to obtain the address of the second edge CDN server；
Processing module, for the address of the first edge CDN server in the access request to be replaced with described second
The address of edge C DN server simultaneously increases the mark of the first edge CDN server to generate the redirection information, described
The mark of first edge CDN server is for indicating that the object content is stored in the first edge CDN server.
8. obtaining the device of content in CDN network according to claim 7, which is characterized in that described device further include:
Receiving module, is also used to receive the content request message of the second edge CDN server, and the content request message is used
The object content is obtained from the first edge CDN server in request；
The processing module is also used in response to the content request message, to described in second edge CDN server transmission
Object content.
9. obtaining the device of content in a kind of CDN network, which is characterized in that be applied in CDN network, the CDN network includes
At least two edges CDN server；Described device is applied to second edge CDN server, and described device includes:
Receiving module, for receiving the access request of terminal；The access request from the second edge CDN server for obtaining
Take object content；It include: address, the first edge CDN server of the second edge CDN server in the access request
The storage address of mark and object content in first edge CDN server；
Processing module, for according to the mark of the first edge CDN server in the access request from first side
Edge CDN server obtains the object content；
Sending module, for the object content to be sent to the terminal.
10. obtaining the device of content in CDN network according to claim 9, which is characterized in that described device further include:
Processing module is also used to store the object content, directly from described when in order to receive terminal access request again
Second edge CDN server obtains the object content.
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