CN109194772A - CDN fringe node returns source method and system - Google Patents
CDN fringe node returns source method and system Download PDFInfo
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- CN109194772A CN109194772A CN201811345240.XA CN201811345240A CN109194772A CN 109194772 A CN109194772 A CN 109194772A CN 201811345240 A CN201811345240 A CN 201811345240A CN 109194772 A CN109194772 A CN 109194772A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/45—Network directories; Name-to-address mapping
- H04L61/4505—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols
- H04L61/4511—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols using domain name system [DNS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
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Abstract
This application involves a kind of method and system of CDN fringe node, method therein includes obtaining CDN fringe node source IP address can be used back；Detection, which each can be used back, respectively returns source rate corresponding to source IP address；It selects back source rate is maximum source IP address can be used back, can be used back source station corresponding to source IP address to carry out Hui Yuan to selection.In scheme provided by the present application, due to going back to source every time maximum time source IP address of source rate can be returned to source station Hui Yuan according to can be used back time source rate of source IP to directly select one, therefore, the corresponding source station of source IP address of going back to that cache server randomly chooses is avoided to return source speed difference or cannot be connected to cache server, the rate that ensure that each Hui Yuan, greatly improves back source efficiency.
Description
Technical field
This application involves content distributing network (Content Delivery Network, CDN) technical fields, more particularly to
A kind of time source method and system of CDN fringe node.
Background technique
Content distributing network (CDN), be mainly used for alleviate backbone network it is crowded, accelerate user's access speed.Its principle is benefit
With CDN fringe node by the way that the caching resource of long-range source station is accelerated user to the access speed of resource to local.It is general every
A CDN fringe node can include multiple cache servers, if the resource of user's access is not found in CDN fringe node, side
Edge node will request resource to source station Hui Yuan, locally deposit while the resource that Hui Yuan is obtained is sent to user in fringe node
Storage is a, when still other user requests same resource, directly takes resource to return to user from local.
In the related technology, usually there are two types of modes when CDN fringe node time source: domain name Hui Yuan and IP go back to sources.When using IP
When the source of returning, fringe node directly acquires multiple times source IP address；Using domain name return source when, what fringe node was got be one or
Multiple times source domain names of person, multiple times source IP address may be parsed by then each returning source domain name.Either IP returns source or domain name
Hui Yuan, when each fringe node needs to request resource to source station, the cache server in fringe node is required from multiple Hui Yuan
One is randomly choosed in IP address returns source IP address to source station Hui Yuan, to obtain the resource of user's needs.And multiple times source IPs
There is the source station that cannot be connected to cache server, or the longer source station of delay in the corresponding source station in location, and is returned using different
Time source rate of the corresponding source station of source IP address is also different, if the corresponding source station of source IP address is gone back in cache server selection
Obstructed, longer or selection the corresponding source station time source rate of source IP address of returning that is perhaps delayed is lower, then caching will be reduced
Server returns source efficiency.
Summary of the invention
To be overcome the problems, such as present in the relevant technologies at least to a certain extent, the application provides a kind of CDN fringe node
Return source method and system.
According to the embodiment of the present application in a first aspect, providing a kind of time source method of CDN fringe node, comprising:
Obtain CDN fringe node can be used back source IP address；
Detection, which each can be used back, respectively returns source rate corresponding to source IP address；
Select back source rate is maximum source IP address can be used back, to selection can be used back source station corresponding to source IP address into
Row Hui Yuan.
Optionally, source IP address can be used back in the CDN fringe node of obtaining, comprising:
Cache server in CDN fringe node obtains the IP address that the source station probe assembly in CDN fringe node provides
IP address in the IP address list is determined as that source IP address can be used back, the IP address in the IP address list by list
Meet following condition: corresponding source station is connected to the CDN fringe node, and delay time is less than preset value.
Optionally, the method also includes:
The source station probe assembly, obtains back source IP address；
The source station probe assembly is detected to source station corresponding to described time source IP address, it is determined whether it can be connected to,
And delay time is obtained when that can be connected to；Alternatively, the source station probe assembly other source station detections from CDN fringe node
Obtain whether source station corresponding to described time source IP address can be connected in component, and the delay time when that can be connected to；
The source station probe assembly can be connected to, and delay time is less than time source IP address of preset value with forming the IP
Location list.
It is optionally, described to obtain back source IP address, comprising:
Obtain source station returns source IP address；Alternatively,
Obtain source station returns source domain name, parses, obtains and described time source domain name corresponding time to described time source domain name
Source IP address.
Optionally, the detection respectively, which each can be used back, returns source rate corresponding to source IP address, comprising:
Respectively using source IP address each can be used back, to the corresponding source station Hui Yuan of source IP address can be used back, and in Hui Yuanjie
It is calculated after beam and each returns corresponding time source rate of source IP address.
Optionally, the method also includes:
Record information in local cache, the information includes: that each source IP address and its corresponding time source speed can be used back
Rate；
It is described to select back source rate is maximum source IP address can be used back, comprising:
According to the information recorded in local cache, select back source rate is maximum source IP address can be used back.
Optionally, the method also includes:
According to predetermined period, the information recorded in local cache is updated.
According to the second aspect of the embodiment of the present application, a kind of time source system of CDN fringe node is provided, comprising:
Cache server；
The cache server is specifically used for:
Obtain CDN fringe node can be used back source IP address；
Detection, which each can be used back, respectively returns source rate corresponding to source IP address；
Select back source rate is maximum source IP address can be used back, to selection can be used back source station corresponding to source IP address into
Row Hui Yuan.
Optionally, the system further include:
Source station probe assembly, for providing IP address list；
The cache server is specifically used for: the IP address list that the source station probe assembly provides is obtained, by the IP
IP address in address list is determined as that source IP address can be used back, and the IP address in the IP address list meets following condition:
Corresponding source station is connected to the CDN fringe node, and delay time is less than preset value.
Optionally, the source station probe assembly is specifically used for:
It is detected to source station corresponding to described time source IP address, it is determined whether can be connected to, and be obtained when that can be connected to
Take delay time；Alternatively, the source station probe assembly obtains described time from CDN fringe node in the probe assembly of other source stations
Whether source station corresponding to source IP address can be connected to, and the delay time when that can be connected to；
It can be connected to, and delay time is less than time source IP address composition IP address list of preset value.
The technical solution that embodiments herein provides can include the following benefits:
Source IP address can be used back by obtaining；Then detection each can be used back and return source speed corresponding to source IP address respectively
Rate；And select back source rate is maximum source IP address can be used back, it can be used back source station corresponding to source IP address to carry out to selection
Hui Yuan.Due to going back to source every time the maximum Hui Yuan of source rate can be returned according to can be used back time source rate of source IP to directly select one
IP address is to source station Hui Yuan, therefore, avoids the corresponding source station of source IP address of going back to that cache server randomly chooses and returns source speed
Rate difference cannot be connected to cache server, be ensure that the rate of each Hui Yuan, greatly improved back source efficiency.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The application can be limited.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application
Example, and together with specification it is used to explain the principle of the application.
Fig. 1 is a kind of flow diagram for returning source method of CDN fringe node shown according to an exemplary embodiment.
Fig. 2 is a kind of structural representation for returning source system of the CDN fringe node shown according to another exemplary embodiment
Figure.
Fig. 3 is a kind of workflow schematic diagram of the source station probe assembly shown according to another exemplary embodiment.
Fig. 4 is a kind of workflow schematic diagram of the cache server shown according to another exemplary embodiment.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the application.On the contrary, they be only with it is such as appended
The example of the consistent system and method for some aspects be described in detail in claims, the application.
Fig. 1 is a kind of flow diagram for returning source method of CDN fringe node shown according to an exemplary embodiment.
As shown in Figure 1, method provided in this embodiment the following steps are included:
Step S11, obtain CDN fringe node can be used back source IP address；
Step S12, detection, which each can be used back, respectively returns source rate corresponding to source IP address；
Step S13 selects back source rate is maximum source IP address can be used back, to can be used back corresponding to source IP address for selection
Source station carry out Hui Yuan.
In step s 11, each source IP address can be used back to correspond to a source station server；
In step s 12, source IP address corresponding one each can be used back to return source rate, this time source rate is buffer service
Rate when device can be used back the corresponding source station server of source IP address to return source resource to this；
In step s 13, corresponding time source rate of source IP address each can be used back by detecting in previous step, selects back
Source rate is maximum to can be used back source IP address, this can be used back the corresponding source station of source IP address optimal, cache server can quickly with
This source station has good connectivity, can be quickly from this source station Hui Yuan to resource.To improve back source efficiency.
In the present embodiment, source IP address can be used back by obtaining；Then detection each can be used back source IP address institute right respectively
That answers returns source rate；And select back source rate is maximum source IP address can be used back, to can be used back corresponding to source IP address for selection
Source station carry out Hui Yuan.Due to going back to source every time source rate can be returned according to can be used back time source rate of source IP to directly select one
Maximum time source IP address is to source station Hui Yuan, therefore, it is corresponding to avoid time source IP address that cache server randomly chooses
Source station is returned source speed difference or cannot be connected to cache server, selects the optimal time corresponding source station of source IP address can every time
To allow cache server to remove Hui Yuan using optimal source IP of returning, it ensure that the rate of each Hui Yuan, greatly improve back source efficiency.
Further, source IP address can be used back in the CDN fringe node of obtaining, comprising:
Cache server in CDN fringe node obtains the IP address that the source station probe assembly in CDN fringe node provides
IP address in the IP address list is determined as that source IP address can be used back, the IP address in the IP address list by list
Meet following condition: corresponding source station is connected to the CDN fringe node, and delay time is less than preset value.
Whether after CDN fringe node receives the resource request of user's transmission, can detect in local cache has user to need
The resource wanted, if it is not, the cache server in CDN fringe node just sends to source station probe assembly and obtains service domain name
The request (wherein, servicing domain name is the domain name for offering customers service) of corresponding time source IP address, source station probe assembly receives
An IP address list is returned to cache server after to the request, records IP address in IP address list, these IP address
Corresponding source station can be connected to the cache server in CDN fringe node, also, delay time be both less than preset value (for example,
Preset value is 1 second), i.e. connection speed is fast.
Further, the method also includes:
The source station probe assembly, obtains back source IP address；
The source station probe assembly is detected to source station corresponding to described time source IP address, it is determined whether it can be connected to,
And delay time is obtained when that can be connected to；Alternatively, the source station probe assembly other source station detections from CDN fringe node
Obtain whether source station corresponding to described time source IP address can be connected in component, and the delay time when that can be connected to；
The source station probe assembly can be connected to, and delay time is less than time source IP address of preset value with forming the IP
Location list.
For example, preset value is set as 1 second, when source station, probe assembly detected delay time less than 1 second, then by the IP
Location leaves, if delay time is greater than or equal to 1 second, deletes the IP address, in this way, being finally included in time source IP of IP address list
Address be all can be connected to cache server and, be delayed lesser time source IP address.
In addition, there are two types of operating modes, i.e. detection mode and non-detection mode for source station probe assembly.Under detection mode,
Source station probe assembly can separately detect the connectivity and delay of source station and cache server, then arrive IP address list；?
Under non-detection mode, source station probe assembly does not need to detect the corresponding source station of each go back to source IP address, because of same one side
The rate of the cache server Hui Yuan of edge node is consistent, and therefore, the cache server of same fringe node can share a source
It stands the detection result of probe assembly, so, when being in non-detection mode, source station probe assembly can direct being in from same node
The detection result to each time source IP address is obtained at the source station probe assembly of detection mode, including goes back to the corresponding source of source IP address
Whether can be connected to, and the delay time when that can be connected to if standing, then in composition IP address list.In this way, avoid it is unnecessary
The detection to source station.
It is further, described to obtain back source IP address, comprising:
Obtain source station returns source IP address；Alternatively,
Obtain source station returns source domain name, parses, obtains and described time source domain name corresponding time to described time source domain name
Source IP address.
In the specific implementation, when fringe node needs go back to source, the source station address that fringe node is got may be one
Or multiple specific IP address, it is also possible to which one or more returns source domain names, when getting when being back source domain name, fringe node
In probe assembly will to return source domain name parse, obtain one or more IP address.
Further, the detection respectively, which each can be used back, returns source rate corresponding to source IP address, comprising:
Respectively using source IP address each can be used back, to the corresponding source station Hui Yuan of source IP address can be used back, and in Hui Yuanjie
It is calculated after beam and each returns corresponding time source rate of source IP address.
Further, the method also includes:
Record information in local cache, the information includes: that each source IP address and its corresponding time source speed can be used back
Rate；
It is described to select back source rate is maximum source IP address can be used back, comprising:
According to the information recorded in local cache, select back source rate is maximum source IP address can be used back.
Further, the method also includes:
According to predetermined period, the information recorded in local cache is updated.
In the specific implementation, cache server receives the IP address list of source station probe assembly feedback and arranges IP address
IP address in table is determined as after source IP address can be used back, and cache server can be used back source IP address to go back using each respectively
Source calculates back source rate after Hui Yuan, and it is local slow that source IP address and corresponding time source rate will be can be used back to be stored in
Deposit middle a period of time, this period is predetermined period, for example, predetermined period be 1 minute, then each can be used back source IP and
Corresponding time source rate can store one minute in local cache, and within this minute, cache server is when needing go back to source, just
It can be used back in source IP address at these, select back source rate is maximum source IP address can be used back to remove Hui Yuan, then each Hui Yuan
After, source rate is calculated back, and update this stored in local cache and corresponding time source rate of source IP address can be used back.Under
In one predetermined period, cache server will request service corresponding time source IP address of domain name to source station probe assembly again,
Source station probe assembly detects back the connectivity of the corresponding source station of source IP address again.And delay time, alternatively, into same node
Other source station probe assemblies obtain detection data, then generate IP address list and are sent to cache server, cache server connects
Above-mentioned process is repeated after receiving IP address list.In this way, the related data in local cache just can be constantly updated, guarantee every time slow
Depositing server can select the optimal source IP address that returns to remove Hui Yuan.
Fig. 2 is a kind of structural representation for returning source system of the CDN fringe node shown according to another exemplary embodiment
Figure.
As shown in Fig. 2, system provided in this embodiment includes:
Cache server 22；
The cache server is specifically used for:
Obtain CDN fringe node can be used back source IP address；
Detection, which each can be used back, respectively returns source rate corresponding to source IP address；
Select back source rate is maximum source IP address can be used back, to selection can be used back source station corresponding to source IP address into
Row Hui Yuan.
Further, the system further include:
Source station probe assembly 21, for providing IP address list；
The cache server is specifically used for: the IP address list that the source station probe assembly provides is obtained, by the IP
IP address in address list is determined as that source IP address can be used back, and the IP address in the IP address list meets following condition:
Corresponding source station is connected to the CDN fringe node, and delay time is less than preset value.
Further, the source station probe assembly is specifically used for:
It is detected to source station corresponding to described time source IP address, it is determined whether can be connected to, and be obtained when that can be connected to
Take delay time；Alternatively, the source station probe assembly obtains described time from CDN fringe node in the probe assembly of other source stations
Whether source station corresponding to source IP address can be connected to, and the delay time when that can be connected to；
It can be connected to, and delay time is less than time source IP address composition IP address list of preset value.
The specific implementation of the present embodiment, reference can be made to the description in the embodiment in relation to this method, details are not described herein again.
The workflow of source station probe assembly and cache server is described separately below.
Fig. 3 is a kind of workflow schematic diagram of the source station probe assembly shown according to another exemplary embodiment.
As shown in figure 3, source station probe assembly gets time source IP address of source station or returns source domain name, if got back
Source domain name will then return source domain name and resolve to one or more times source IP address；Then above-mentioned time source IP address is detected, mistake
The excessive time source IP address of delay is filtered, then remaining returns source IP address and is included in IP address list.
Fig. 4 is a kind of workflow schematic diagram of the cache server shown according to another exemplary embodiment.
As shown in figure 4, cache server obtains IP address list to source station probe assembly；Using each time in IP address list
Source IP address Hui Yuan tests corresponding time source rate of each time source IP address；Then use back source rate most fast every time after
Return source IP address Hui Yuan；The rate of source IP is renewed back to after Hui Yuan；Judge back whether source IP address is expired (i.e. either with or without reaching
Predetermined period), if time source IP address Hui Yuan for still using rate most fast without expired, when going back to source again, if
It is expired, then IP address list is obtained to source station probe assembly again.
The application in order to better understand below carries out the overall workflow of source station probe assembly and cache server
Explanation.
Source station probe assembly is used to obtain back source IP address from source station or returns source domain name, when getting back source domain name,
Source domain name will be returned and resolve to back source IP address, and these time source IP address will be detected, it is obstructed or be delayed to filter out those
Big returns source IP address.When cache server needs go back to source, corresponding go back to source IP address of domain name, source are serviced to source station probe requests thereby
Probe assembly of standing to cache server returns to the IP address list that it obtains after treatment, comprising can be used back in IP address list
Source IP address.Cache server can will can be used back source IP address to delay from these IP address lists that source station probe assembly obtains
It is stored to oneself memory (for example predetermined period is one minute) for a period of time, next this period will use these when going back to source can
Hui Yuan is removed with source IP address is returned.Firstly, cache server can one by one using one time these can be used back source IP address to remove Hui Yuan, Hui Yuan
After can calculate it is each can be used back source IP address return source rate, and record.It is most fast to will use rate when going back to source again
Hui Yuan can be removed with source IP address is returned, the source of returning terminates to update the corresponding time source rate that source IP address can be used back.Like this at this section
In, Hui Yuan always is removed using the most fast IP of rate, the source of returning terminates to be renewed back to source rate.This period (predetermined period) meeting is crossed
Source IP address list is obtained back to source station detection again, repeats above-mentioned process.
Because the rate with the cache server Hui Yuan of node is consistent, the cache server with node can be shared
The detection result of a source station probe assembly.Source station probe assembly can work in detection mode and non-detection mode.Detection mode
Under be that source station probe assembly separately detects back whether the corresponding source station of source IP address is connected to cache server, and in connection
Delay.Non- detection mode does not instead of directly detect time source IP address, visits from the source station of the detection mode of same node
Component is surveyed to obtain to the detection data for returning source IP address.It in this way can be to avoid the unnecessary detection to source station.
About the system in above-described embodiment, wherein modules execute the concrete mode of operation in other embodiments
In be described in detail, no detailed explanation will be given here.
It is understood that same or similar part can mutually refer in the various embodiments described above, in some embodiments
Unspecified content may refer to the same or similar content in other embodiments.
It should be noted that term " first ", " second " etc. are used for description purposes only in the description of the present application, without
It can be interpreted as indication or suggestion relative importance.In addition, in the description of the present application, unless otherwise indicated, the meaning of " multiple "
Refer at least two.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the application includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, to execute function, this should be by the application
Embodiment person of ordinary skill in the field understood.
It should be appreciated that each section of the application can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware
Any one of column technology or their combination are realized: having a logic gates for realizing logic function to resource signal
Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
It, can also be in addition, can integrate in a processing module in each functional unit in each embodiment of the application
It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould
Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the application.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
Although embodiments herein has been shown and described above, it is to be understood that above-described embodiment is example
Property, it should not be understood as the limitation to the application, those skilled in the art within the scope of application can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of CDN fringe node returns source method characterized by comprising
Obtain CDN fringe node can be used back source IP address；
Detection, which each can be used back, respectively returns source rate corresponding to source IP address；
It selects back source rate is maximum source IP address can be used back, can be used back source station corresponding to source IP address to be returned to selection
Source.
2. the method according to claim 1, wherein source IP address can be used back in the CDN fringe node of obtaining,
Include:
Cache server in CDN fringe node obtains the IP address column that the source station probe assembly in CDN fringe node provides
IP address in the IP address list is determined as that source IP address can be used back by table, and the IP address in the IP address list is full
The following condition of foot: corresponding source station is connected to the CDN fringe node, and delay time is less than preset value.
3. according to the method described in claim 2, it is characterized by further comprising:
The source station probe assembly, obtains back source IP address；
The source station probe assembly is detected to source station corresponding to described time source IP address, it is determined whether it can be connected to, and
Delay time is obtained when that can be connected to；Alternatively, the source station probe assembly other source stations probe assembly from CDN fringe node
Return whether source station corresponding to source IP address can be connected to described in middle acquisition, and the delay time when that can be connected to；
The source station probe assembly can be connected to, and delay time is less than time source IP address composition IP address column of preset value
Table.
4. according to the method described in claim 3, it is characterized in that, described obtain back source IP address, comprising:
Obtain source station returns source IP address；Alternatively,
Obtain source station returns source domain name, parses, obtains and corresponding time source IP of described time source domain name to described time source domain name
Address.
5. the method according to claim 1, wherein the detection respectively each can be used back corresponding to source IP address
Return source rate, comprising:
Respectively using source IP address each can be used back, to the corresponding source station Hui Yuan of source IP address can be used back, and after Hui Yuan
It calculates and each returns corresponding time source rate of source IP address.
6. according to the method described in claim 5, it is characterized by further comprising:
Record information in local cache, the information includes: that each source IP address and its corresponding time source rate can be used back；
It is described to select back source rate is maximum source IP address can be used back, comprising:
According to the information recorded in local cache, select back source rate is maximum source IP address can be used back.
7. according to the method described in claim 6, it is characterized by further comprising:
According to predetermined period, the information recorded in local cache is updated.
8. a kind of CDN fringe node returns source system characterized by comprising
Cache server；
The cache server is specifically used for:
Obtain CDN fringe node can be used back source IP address；
Detection, which each can be used back, respectively returns source rate corresponding to source IP address；
It selects back source rate is maximum source IP address can be used back, can be used back source station corresponding to source IP address to be returned to selection
Source.
9. system according to claim 8, which is characterized in that further include:
Source station probe assembly, for providing IP address list；
The cache server is specifically used for: the IP address list that the source station probe assembly provides is obtained, by the IP address
IP address in list is determined as that source IP address can be used back, and the IP address in the IP address list meets following condition: institute is right
The source station answered is connected to the CDN fringe node, and delay time is less than preset value.
10. system according to claim 9, which is characterized in that the source station probe assembly is specifically used for:
It is detected to source station corresponding to described time source IP address, it is determined whether can be connected to, and obtain and prolong when that can be connected to
When the time；Alternatively, the source station probe assembly returns source IP from acquisition is described in the probe assembly of other source stations in CDN fringe node
Whether source station corresponding to address can be connected to, and the delay time when that can be connected to；
It can be connected to, and delay time is less than time source IP address composition IP address list of preset value.
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| CN201811345240.XA CN109194772A (en) | 2018-11-13 | 2018-11-13 | CDN fringe node returns source method and system |
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| CN201811345240.XA Pending CN109194772A (en) | 2018-11-13 | 2018-11-13 | CDN fringe node returns source method and system |
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| CN112333290A (en) * | 2021-01-05 | 2021-02-05 | 腾讯科技（深圳）有限公司 | Data access control method, device, storage medium and content distribution network system |
| CN112653736A (en) * | 2020-12-10 | 2021-04-13 | 北京金山云网络技术有限公司 | Parallel source returning method and device and electronic equipment |
| CN112866356A (en) * | 2021-01-04 | 2021-05-28 | 成都知道创宇信息技术有限公司 | CDN cache method and device and electronic equipment |
| CN113596105A (en) * | 2021-07-06 | 2021-11-02 | 深圳市华曦达科技股份有限公司 | Content acquisition method, edge node and computer-readable storage medium |
| CN114189523A (en) * | 2021-12-17 | 2022-03-15 | 中国电信股份有限公司 | Method, device and storage medium for back source of edge node of CDN (content delivery network) |
| CN114726859A (en) * | 2022-03-07 | 2022-07-08 | 网宿科技股份有限公司 | Return request transmission method, electronic device and storage medium |
| CN115333936A (en) * | 2021-04-22 | 2022-11-11 | 贵州白山云科技股份有限公司 | Method, device, medium and equipment for switching back source strategy |
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