CN104580012A - Method and device for selecting content delivery network nodes - Google Patents
Method and device for selecting content delivery network nodes Download PDFInfo
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Abstract
The invention relates to a method for selecting content delivery network nodes. The method comprises the following steps: respectively obtaining traffic information of second network service in a plurality of nodes when a request for selecting the nodes for first network service is received, determining a network traffic peak value of the second network service in a given statistical time length according to historical traffic information of the second network service, respectively obtaining maximum network bandwidth of the plurality of nodes, using the difference between the maximum network bandwidth of the plurality of nodes and the network traffic peak value of the second network service as available network bandwidth and selecting the nodes according to the available network bandwidth. According to the method and device for selecting the content delivery network nodes, the bandwidth of the nodes can be effectively used; furthermore, after the first network service of the nodes with a large amount of first network service is ended, imbalanced network load caused by sharp decline of data traffic can be avoided, therefore, the operation of a CDN (content delivery network) is facilitated.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of system of selection and device of content delivery network node.
Background technology
According to statistics, come from Online Video service in current mobile Internet up to the flow of 60%, displaying video content shows word relatively, and the basic contents such as picture need to take massive band width, and conventional the Internet service provider faces increasing bandwidth pressure.
In prior art, Online Video service provider provides during service and generally adopts content distributing network (CDN, Content Delivery Network) technology solves the broadcasting response speed that exists in video playback problem fast not, because geographical position in CDN is near user and efficient cache caching technology, can significantly improve particular video frequency accessed time connection and broadcasting speed, and the pressure of data center (DC, Data Center) server can be alleviated, effective load sharing.
But in above prior art, the calling system in CDN does not add the scheduling of differentiation to order video and live video, can cause occurring a large amount of live connection in metropolitan area point (OC, the Outside Center) server providing current video to serve.Due to namely cannot the characteristic of switching server after live successful connection, the data traffic entering OC server cannot effectively be switched to other servers, may occur that OC server cannot provide the situation of service for former business when flow peak.Further, the OC server having a large amount of live connection will occur that data traffic significantly falls sharply after live end, causes offered load unbalanced, is unfavorable for that CDN is run.Moreover live video business needs operation and maintenance personnel to control in real time at the bandwidth usage of each OC server, human cost consumption is large, and OC server bandwidth is difficult to be utilized effectively.
Summary of the invention
In view of this, the invention provides a kind of system of selection and device of content delivery network node, effectively can utilize node bandwidth.
The system of selection of the content delivery network node that the embodiment of the present invention provides, comprising:
When receiving the request for first network services selection node, obtain the flow information of second network service in multiple node respectively; According to the historical traffic information that described second network is served, determine the network traffics peak value of described second network service in given statistics duration; Obtain the maximum network bandwidth of described multiple node respectively; The difference of the network traffics peak value of the maximum network bandwidth of described multiple node and described second network being served respectively is as available network bandwidth; Node is selected according to described available network bandwidth.
The choice device of the content delivery network node that the embodiment of the present invention provides, comprising:
Acquiring unit, for when receiving the request for first network services selection node, obtains the flow information of second network service in multiple node respectively; Determining unit, according to the historical traffic information that described second network is served, determines the network traffics peak value of described second network service in given statistics duration; Described acquiring unit, also for obtaining the maximum network bandwidth of described multiple node respectively; Described determining unit, the difference of the network traffics peak value of also serving for the maximum network bandwidth of described multiple node that obtained by described acquiring unit respectively and described second network is as available network bandwidth; Selected cell, selects node for the described available network bandwidth determined according to described determining unit.
The system of selection of the content delivery network node that the embodiment of the present invention provides and device, obtain the flow information of second network service in multiple node, further according to the historical traffic information that this second network is served, determine the network traffics peak value of this second network service in given statistics duration, just the available network bandwidth that in each node, first network is served can be determined according to the maximum network bandwidth of each node and the difference of this network traffics peak value, node is selected according to this available network bandwidth, so, when for first network services selection node, can according to determining to add up the second network service history flow in duration, the available network bandwidth can also distributed for first network service in node is calculated under taking into account the prerequisite of the network bandwidth that second network service uses, effectively can utilize node bandwidth, and when having the node of a large amount of first network service after first network service terminates, there will not be data traffic significantly to fall sharply and cause offered load unbalanced, thus be more beneficial to CDN operation.
For above and other object of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and coordinate institute's accompanying drawings, be described in detail below.
Accompanying drawing explanation
Fig. 1 is first embodiment schematic diagram of the system of selection of content delivery network node in the embodiment of the present invention;
Second embodiment schematic diagram of the system of selection of content delivery network node in Fig. 2 embodiment of the present invention;
Fig. 3 is a network service history total-flow-rate curve figure of the system of selection of content delivery network node in the embodiment of the present invention;
Fig. 4 is the historical traffic curve chart of a first network service of the system of selection of content delivery network node in the embodiment of the present invention;
Fig. 5 is another network service history total-flow-rate curve figure of the system of selection of content delivery network node in the embodiment of the present invention;
Fig. 6 is the historical traffic curve chart of another first network service of the system of selection of content delivery network node in the embodiment of the present invention;
Fig. 7 is dispatching patcher structural representation in the embodiment of the present invention;
Fig. 8 is first embodiment schematic diagram of the choice device of content delivery network node in the embodiment of the present invention;
Fig. 9 is second embodiment schematic diagram of the choice device of content delivery network node in the embodiment of the present invention;
A kind of server architecture schematic diagram that Figure 10 provides for the embodiment of the present invention.
Embodiment
For further setting forth the present invention for the technological means that realizes predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to according to the specific embodiment of the present invention, structure, feature and effect thereof, be described in detail as follows.
Refer to Fig. 1, first embodiment of the system of selection of the content delivery network node in the embodiment of the present invention comprises:
101, when receiving the request for first network services selection node, the flow information of second network service in multiple node is obtained respectively;
Embodiment of the present invention interior joint is the cross-connection point of signal in network, and being that business divides slotting joint, can be server, can be also server cluster, provide the machine room etc. of business.Network can be CDN.
When dispatching patcher receives the request into first network services selection node, obtain the flow information of second network service in multiple node respectively.
102, according to the historical traffic information that this second network is served, the network traffics peak value of this second network service in given statistics duration is determined;
This historical traffic information can be multiple historical traffic information, as the historical traffic information of this second network server of the every day before current date.The network traffics peak value of this second network service refers in the duration that this is given, the network traffics maximum shared by the service of this second network.In the present embodiment, comprehensive multiple historical traffic determines the network traffics peak value that this second network is served, and more accurately can obtain the network traffics peak value of this second network service.
103, the maximum network bandwidth of the plurality of node is obtained respectively;
Obtain the network bandwidth higher limit of each node respectively.
The difference of the network traffics peak value of 104, the maximum network bandwidth of the plurality of node and this second network being served respectively is as available network bandwidth;
Shared by first network service and second network service, the summation of bandwidth can not exceed maximum network bandwidth, calculates maximum network bandwidth and the network traffics peak value of second network server, then can obtain the available network bandwidth that in each node, first network is served.
105, node is selected according to this available network bandwidth.
According to the available network bandwidth of each node, the node that the request selecting for this first network services selection node is corresponding.
In the embodiment of the present invention, dispatching patcher obtains the flow information of second network service in multiple node, further according to the historical traffic information that this second network is served, determine the network traffics peak value of this second network service in given statistics duration, just the available network bandwidth that in each node, first network is served can be determined according to the maximum network bandwidth of each node and the difference of this network traffics peak value, node is selected according to this available network bandwidth, so, when for first network services selection node, can according to determining to add up the second network service history flow in duration, the available network bandwidth can also distributed for first network service in node is calculated under taking into account the prerequisite of the network bandwidth that second network service uses, effectively can utilize node bandwidth, and when having the node of a large amount of first network service after first network service terminates, there will not be data traffic significantly to fall sharply and cause offered load unbalanced, thus be more beneficial to CDN operation.
Refer to Fig. 2, second embodiment of the system of selection of the content delivery network node in the embodiment of the present invention comprises:
201, when receiving the request for first network services selection node, the flow information of second network service in multiple node is obtained respectively;
First network service in the embodiment of the present invention can be live video service, it can be live audio service, also can be the network service of other request selecting nodes, first network service is once start at certain node, then cannot change other nodes, and the node that can only start at this has continued follow-up service, second network service can for other network services except live video service, as video on demand service, On-demand audio service, multiple second network service can be there is in the same node simultaneously.Node is the cross-connection point of signal in network, and being that business divides slotting joint, can be server, can be also server cluster, provide the machine room etc. of business.
Below the present embodiment describe in all for first network service for live video, second network service is order video is example.
When dispatching patcher receives the request into live video services selection node, obtain the flow information of other network services in multiple node except live video service respectively, also namely to obtain in multiple node this bandwidth information shared by other network services, the video on demand service flow as obtained is 5,000 million.
202, the lasting duration of this first network service current is defined as given statistics duration;
The lasting duration of current this live video service carried out, can inquire about in the list of concrete reproduction time recording this live video service and obtain, as, current this live video service carried out is the tennis singles final live video service of sports channel, then can find the lasting duration of this live video service in the TV guide table of sports channel.
The lasting duration of this live video service current is defined as given statistics duration, and e.g., the lasting duration of this live video service current is from 12 o'clock to 15 o'clock, and so given statistics duration is also 12 o'clock to 15 o'clock.
203, in preset measurement period, multiple historical traffic information of this second network service in this given statistics duration are added up;
Measurement period can be self-defined according to system statistics situation, as being be the cycle with sky, adding up the historical traffic information of this video on demand service every day, also can be take week as the cycle, add up weekly the historical traffic information of this video on demand service.
In preset measurement period, add up multiple historical traffic information of this video on demand service in this given statistics duration, as, today is Thursday, timing statistics is 12 o'clock to 15 o'clock, then add up the flow information of 12 o'clock Wednesdays (i.e. the previous day of Thursday) to 15 o'clock these video on demand service, add up the flow information of 12 o'clock previous Wednesdays to 15 o'clock these video on demand service, add up again the flow information of 12 o'clock previous Wednesdays to 15 o'clock these video on demand service, by that analogy, multiple historical traffic information of this video on demand service are counted.
The service provided due to node may have multiple, the flow of this video on demand service needs the flow value superposing a lot of network service, the superposition of multiple flow value may bring the problem that the error of calculation is large, so the flow that the flow that the overall network flow of the all-network service added up in statistics duration given in preset measurement period deducts this live video service obtains this video on demand service is more accurate.
Concrete example illustrates, current time was for September 8, and so network service history total flow information can add up the flow information in 1 day September on the same day of its September 7 the previous day and last week.Refer to Fig. 3-6, the network service history total-flow-rate curve figure on September 7 is described in Fig. 3, the peak value of network service history total flow is 7157M(million), appear at 23: 46 on the 7th September, and the network service history total flow in 23: 59 on the 7th September is 6664M.Describe the historical traffic curve chart of the live video service on September 7 in Fig. 4, the historical traffic peak value of live video service is 940M, appear at 20: 47 on the 7th September, and the historical traffic of the live video service in 23: 59 on the 7th September is 345M.Describe the network service history total-flow-rate curve figure on September 1 in Fig. 5, the peak value of network service history total flow is 7534M, appear at 23: 46 on the 1st September, and the network service history total flow in 23: 59 on the 1st September is 6717M.Describe the historical traffic curve chart of the live video service on September 1 in Fig. 6, the historical traffic peak value of live video service is 1286M, appear at 17: 06 on the 1st September, and the historical traffic of the live video service in 23: 59 on the 1st September is 423M.The historical traffic of video on demand service is the historical traffic peak value that network service history total flow deducts live video service.
204, according to the maximum difference of this second network service maxima and minima of historical traffic in given statistics duration, the flow amount of increase that this second network is served is determined;
Multiple timing statistics point is comprised in given statistics duration, and the historical traffic value of this video on demand service of each timing statistics point is not quite similar, then in this given statistics duration, the historical traffic of this video on demand service multiple forms a curve, namely the peak value of this curve is the maximum of historical traffic in this given statistics duration, and namely the valley of this curve is the minimum value of historical traffic in this given statistics duration, the difference of this video on demand service maxima and minima of historical traffic in given statistics duration is the flow amount of increase of this video on demand service.Like this, in preset measurement period, obtain the flow amount of increase of this video on demand service multiple, maximum is wherein defined as the flow amount of increase of this video on demand service, the bandwidth of distributing for live video service is dropped to minimum on the impact of video on demand service.
Understandable, be not limited to the flow amount of increase of the maximum difference of this video on demand service maxima and minima of historical traffic in given statistics duration as this video on demand service in the present embodiment, also the mean difference of this video on demand service maxima and minima of historical traffic in given statistics duration can be defined as the flow amount of increase of this video on demand service.
205, the current network flow of this flow amount of increase and the service of this second network is added, obtains the network traffics peak value of this second service;
The network traffics peak value of this video on demand service refers in the duration that this is given, the network traffics maximum shared by this video on demand service.The current network flow of this flow amount of increase with this video on demand service is added, obtains the network traffics peak value of this order video.
206, the maximum network bandwidth of the plurality of node is obtained respectively;
Obtain the network bandwidth higher limit of each node respectively.The execution sequence of step 206 by the restriction described at the present embodiment, can not perform before any one step.
The difference of the network traffics peak value of 207, the maximum network bandwidth of the plurality of node and this second network being served respectively is as available network bandwidth;
Shared by live video service and video on demand service, the summation of bandwidth can not exceed maximum network bandwidth, calculates maximum network bandwidth and the network traffics peak value of video on demand service device, then can obtain the available network bandwidth that in each node, live video is served.
208, the node selecting described available network bandwidth maximum in the plurality of node is as destination node.
According to the available network bandwidth of each node, the node that the request selecting for this live video services selection node is corresponding.In order to ensure that this live video service obtains better network traffics resource, then the node selecting this available network bandwidth maximum in the plurality of node is as destination node.
If there is multiple node is that the maximum bandwidth of current first traffic assignments is all equal, then according to the IP address information of user, the prioritizing selection node little apart from the source IP addresses of this request is as destination node.
In the embodiment of the present invention, dispatching patcher obtains the flow information of video on demand service in multiple node, further according to the historical traffic information of this video on demand service, determine the network traffics peak value of this video on demand service in given statistics duration, be specially in preset measurement period, obtain the flow amount of increase of this video on demand service multiple, maximum is wherein defined as the flow amount of increase of this video on demand service, the bandwidth of distributing for live video service is dropped to minimum on the impact of video on demand service, the current network flow of this flow amount of increase with this video on demand service is added, obtain the network traffics peak value of this second service, just the available network bandwidth that in each node, live video is served can be determined according to the maximum network bandwidth of each node and the difference of this network traffics peak value, the node selecting described available network bandwidth maximum in the plurality of node is as destination node, so, when for live video services selection node, can according to determining to add up the video on demand service historical traffic in duration, the available network bandwidth can also distributed for live video service in node is calculated under taking into account the prerequisite of the network bandwidth that video on demand service uses, effectively can utilize node bandwidth, and when having the node of a large amount of live video service after live video service terminates, there will not be data traffic significantly to fall sharply and cause offered load unbalanced, thus be more beneficial to CDN operation.
Below with the dispatching patcher in a detailed applications scene description the present embodiment, refer to Fig. 7,
Dispatching patcher 301 comprises: historical information unit 302, unit of video information 303, data acquisition unit 304, forecast and decision unit 305, CDN scheduler 306, IP storehouse;
Wherein, historical information unit 302, for adding up the historical traffic information of this second network business;
Unit of video information 303, for being defined as given statistics duration by the lasting duration of this first network service current;
Data acquisition unit 304, for adding up the flow information of first network service and second network service;
Forecast and decision unit 305, for the flow information in conjunction with first network service and second network service, determines the available network bandwidth that first network is served;
CDN scheduler 306, for the schedulable bandwidth obtained according to forecast and decision unit 305, in conjunction with the positional information such as ip address of user 307, is dispatched to most suitable target OC node 308 for this first network services selection;
IP storehouse 309, for storing the IP address information of user.
Dispatching patcher 301 sends dispatching command to user 307, and notify the target OC node 308 that user 307 cuts, user 307 accesses the target OC node 308 in CDN.
Refer to Fig. 8, first embodiment of the choice device of the content delivery network node in the embodiment of the present invention comprises:
Acquiring unit 401, for when receiving the request for first network services selection node, obtains the flow information of second network service in multiple node respectively;
Determining unit 402, according to the historical traffic information that this second network is served, determines the network traffics peak value of this second network service in given statistics duration;
Acquiring unit 401, also for obtaining the maximum network bandwidth of the plurality of node respectively;
Determining unit 402, the difference of the network traffics peak value of also serving for the maximum network bandwidth of the plurality of node that obtained by this acquiring unit 401 respectively and this second network is as available network bandwidth;
Selected cell 403, selects node for this available network bandwidth determined according to determining unit 402.
In the embodiment of the present invention, each unit of the choice device of content delivery network node realizes the process of respective function, refers to the detailed description of the embodiment of first shown in earlier figures 1, repeats no more herein.
In the embodiment of the present invention, acquiring unit 401 obtains the flow information of second network service in multiple node, further according to the historical traffic information that this second network is served, determining unit 402 determines the network traffics peak value of this second network service in given statistics duration, according to the maximum network bandwidth of each node and the difference of this network traffics peak value, determine that single 402 just can determine the available network bandwidth that in each node, first network is served, selected cell 403 selects node according to this available network bandwidth, so, when for first network services selection node, can according to determining to add up the second network service history flow in duration, the available network bandwidth can also distributed for first network service in node is calculated under taking into account the prerequisite of the network bandwidth that second network service uses, effectively can utilize node bandwidth, and when having the node of a large amount of first network service after first network service terminates, there will not be data traffic significantly to fall sharply and cause offered load unbalanced, thus be more beneficial to CDN operation.
Refer to Fig. 9, second embodiment of the choice device of the content delivery network node in the embodiment of the present invention comprises:
Acquiring unit 501, for when receiving the request for first network services selection node, obtains the flow information of second network service in multiple node respectively;
Determining unit 502, according to the historical traffic information that this second network is served, determines the network traffics peak value of this second network service in given statistics duration;
Acquiring unit 501, also for obtaining the maximum network bandwidth of the plurality of node respectively;
Determining unit 502, the difference of the network traffics peak value of also serving for the maximum network bandwidth of the plurality of node that obtained by this acquiring unit 501 respectively and this second network is as available network bandwidth;
Selected cell 503, selects node for this available network bandwidth determined according to determining unit 502.
Further, determining unit 502, also for the lasting duration of this first network service current is defined as this given statistics duration.
The choice device of the content delivery network node in the present embodiment, can further include:
Statistic unit 504, in preset measurement period, adds up multiple historical traffic information of this second network service in this given statistics duration.
Further, determining unit 502, also for the maximum difference according to this second network service maxima and minima of historical traffic in given statistics duration, determines the flow amount of increase that this second network is served;
The choice device of the content delivery network node in the present embodiment, can further include:
Computing unit 505, for the current network flow of this flow amount of increase and the service of this second network being added, obtains at this network traffics peak value.
Further, selected cell 503, also in the plurality of node, select this available network bandwidth maximum node as destination node.
Selected cell 503, also for the prioritizing selection node little apart from the source internet protocol address of this request as destination node.
In the embodiment of the present invention, each unit of the choice device of content delivery network node realizes the process of respective function, refers to the detailed description of the embodiment of first shown in earlier figures 1, Fig. 2 and second embodiment, repeats no more herein.
In the embodiment of the present invention, acquiring unit 501 obtains the flow information of second network service in multiple node, determining unit 502 is further according to the historical traffic information that this second network is served, determine the network traffics peak value of this second network service in given statistics duration, be specially determining unit 502 in preset measurement period, obtain the flow amount of increase of this second network multiple service, maximum is wherein defined as the flow amount of increase of this second network service, the bandwidth of distributing for first network service is dropped to minimum on the impact of second network service, the current network flow of this flow amount of increase and the service of this second network is added by computing unit 505, obtain the network traffics peak value of this second service, the maximum network bandwidth of determining unit 502 according to each node and the difference of this network traffics peak value, just the available network bandwidth of first network service in each node can be determined, the node that selected cell 503 selects this available network bandwidth maximum in the plurality of node is as destination node, so, when for first network services selection node, can according to determining to add up the second network service history flow in duration, the available network bandwidth can also distributed for first network service in node is calculated under taking into account the prerequisite of the network bandwidth that second network service uses, effectively can utilize node bandwidth, and when having the node of a large amount of first network service after first network service terminates, there will not be data traffic significantly to fall sharply and cause offered load unbalanced, thus be more beneficial to CDN operation.
A kind of server architecture schematic diagram that the embodiment of the present invention provides see Figure 10, Figure 10.This server 600 can produce larger difference because of configuration or performance difference, one or more central processing units (central processing units can be comprised, CPU) 622(such as, one or more processors) and memory 632, one or more store storage medium 630(such as one or more mass memory units of application program 642 or data 644).Wherein, memory 632 and storage medium 630 can be of short duration storages or store lastingly.The program being stored in storage medium 630 can comprise one or more modules (illustrating not shown), and each module can comprise a series of command operatings in server.Further, central processing unit 622 can be set to communicate with storage medium 630, and server 600 performs a series of command operatings in storage medium 630.Server 600 can also comprise one or more power supplys 626, one or more wired or wireless network interfaces 650, one or more input/output interfaces 658, and/or, one or more operating systems 641, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM etc.Above-mentioned Fig. 1 and embodiment illustrated in fig. 2 described in the step performed by server can based on the server architecture shown in this Figure 10.
It should be noted that, each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.For device class embodiment, due to itself and embodiment of the method basic simlarity, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or device and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or device.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the device comprising described key element and also there is other identical element.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be do not depart from technical solution of the present invention content, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. a system of selection for content delivery network node, is characterized in that, comprising:
When receiving the request for first network services selection node, obtain the flow information of second network service in multiple node respectively;
According to the historical traffic information that described second network is served, determine the network traffics peak value of described second network service in given statistics duration;
Obtain the maximum network bandwidth of described multiple node respectively;
The difference of the network traffics peak value of the maximum network bandwidth of described multiple node and described second network being served respectively is as available network bandwidth;
Node is selected according to described available network bandwidth.
2. method according to claim 1, is characterized in that, described historical traffic information of serving according to described second network, comprises before determining the network traffics peak value of described second network service in given statistics duration:
The lasting duration of current described first network service is defined as described given statistics duration;
In preset measurement period, add up multiple historical traffic information of described second network service in described given statistics duration.
3. method according to claim 1, is characterized in that, described historical traffic information of serving according to described second network, determines that the network traffics peak value of described second network service in given statistics duration comprises:
According to the maximum difference of described second network service maxima and minima of historical traffic in given statistics duration, determine the flow amount of increase that described second network is served;
The current network flow of described flow amount of increase and the service of described second network is added, obtains at described network traffics peak value.
4. method according to claim 1, is characterized in that, is that the node that this request selecting is corresponding comprises according to this available network bandwidth:
The node selecting described available network bandwidth maximum in described multiple node is as destination node.
5. the method according to any one of Claims 1-4, is characterized in that, described method also comprises:
The little node of source internet protocol address of prioritizing selection distance described request is as destination node.
6. a choice device for content delivery network node, is characterized in that, comprising:
Acquiring unit, for when receiving the request for first network services selection node, obtains the flow information of second network service in multiple node respectively;
Determining unit, according to the historical traffic information that described second network is served, determines the network traffics peak value of described second network service in given statistics duration;
Described acquiring unit, also for obtaining the maximum network bandwidth of described multiple node respectively;
Described determining unit, the difference of the network traffics peak value of also serving for the maximum network bandwidth of described multiple node that obtained by described acquiring unit respectively and described second network is as available network bandwidth;
Selected cell, selects node for the described available network bandwidth determined according to described determining unit.
7. device according to claim 6, is characterized in that,
Described determining unit, also for the lasting duration of current described first network service is defined as described given statistics duration;
Described device also comprises:
Statistic unit, in preset measurement period, adds up multiple historical traffic information of described second network service in described given statistics duration.
8. device according to claim 6, is characterized in that,
Described determining unit, also for the maximum difference according to described second network service maxima and minima of historical traffic in given statistics duration, determines the flow amount of increase that described second network is served;
Described device also comprises:
Computing unit, for the current network flow of described flow amount of increase and the service of described second network being added, obtains at described network traffics peak value.
9. device according to claim 6, is characterized in that,
Described selected cell, also in described multiple node, select described available network bandwidth maximum node as destination node.
10. the device according to any one of claim 6 to 9, is characterized in that,
Described selected cell, also for the little node of source internet protocol address of prioritizing selection distance described request as destination node.
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Cited By (18)
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| US10623320B2 (en) | 2015-10-28 | 2020-04-14 | Huawei Technologies Co., Ltd. | Load sharing method, apparatus, and system |
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