CN106375471B - Edge node determination method and device - Google Patents
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- CN106375471B CN106375471B CN201610866777.5A CN201610866777A CN106375471B CN 106375471 B CN106375471 B CN 106375471B CN 201610866777 A CN201610866777 A CN 201610866777A CN 106375471 B CN106375471 B CN 106375471B
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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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- 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
- H04L67/566—Grouping or aggregating service requests, e.g. for unified processing
Abstract
the embodiment of the invention discloses a method and a device for determining edge nodes, which are applied to a dispatcher in a content distribution network system, wherein the content distribution network system comprises the following components: at least one edge node and a scheduler; the method comprises the following steps: receiving a source returning request sent by a target edge node, wherein the source returning request at least comprises identification information of the target edge node and identification information of user request content; determining a returnable source edge node set containing the user request content according to the identification information of the target edge node and the identification information of the user request content; determining one edge node from the set of resilient source edge nodes as a resilient source edge node of the target edge node. By applying the embodiment of the invention, the returnable source edge node is determined for the edge node, so that the determination of the returnable source edge node is centralized, and the unified management of the edge node is realized.
Description
Technical Field
The present invention relates to the field of content distribution network technologies, and in particular, to a method and an apparatus for determining an edge node.
background
In recent years, with the rapid development of internet technology, the access demand of users of various large websites is increasing. In order to improve the access response speed, enable a user to obtain requested content more quickly, and solve the congestion state of the network, a CDN (content delivery network) plays an important role.
In CDN systems, back sourcing is an important technology. The back source means that after receiving a user request, the CDN system allocates an edge node to the user, and the user requests the edge node for required data; if the request is not available (namely the edge node does not have the data required by the user), the edge node determines the edge node which stores the data required by the user, requests the data required by the user from the determined edge node, further obtains the data required by the user, and feeds back the obtained data required by the user to the user. The determined edge node is a returnable source node which needs to return to the source edge node, that is, the edge node which needs to return to the source can return to the returnable source node.
In the above-mentioned back-source process, the edge node determines the edge node storing the data required by the user, and is mainly based on static IP configuration. That is, the operation and maintenance personnel configure the IP address of the edge node which can return to the source in each edge node; when returning to the source, the edge node determines an edge node to return to the source through a consistent hash algorithm according to the configured IP address.
However, when each edge node performs source returning, it needs to determine a source returnable edge node according to the configured IP address. The determination of the source edge node is more dispersed, and the unified management of the edge node cannot be realized.
disclosure of Invention
The embodiment of the invention aims to provide a method and a device for determining edge nodes, so that the determination of returnable edge nodes is centralized, and the unified management of the edge nodes is realized.
in order to achieve the above object, the embodiment of the present invention discloses a method and a device for determining an edge node, and the specific scheme is as follows:
an edge node determination method applied to a scheduler in a content distribution network system, the content distribution network system comprising: at least one edge node and a scheduler; the method comprises the following steps:
receiving a source returning request sent by a target edge node, wherein the source returning request at least comprises identification information of the target edge node and identification information of user request content;
determining a returnable source edge node set containing the user request content according to the identification information of the target edge node and the identification information of the user request content;
determining one edge node from the set of resilient source edge nodes as a resilient source edge node of the target edge node.
optionally, the determining, according to the identification information of the target edge node and the identification information of the user request content, a returnable source edge node set including the user request content includes:
Determining a first edge node set according to the identification information of the target edge node and a preset determination rule;
Determining a returnable source edge node set containing the user request content from the first edge node set according to the identification information of the user request content; or the like, or, alternatively,
determining a second edge node set containing the user request content according to the identification information of the user request content;
and determining a returnable source edge node set from the second edge node set according to the identification information of the target edge node and the preset determination rule.
Optionally, the determining an edge node from the set of resilient source edge nodes as the resilient source edge node of the target edge node includes:
obtaining the residual bandwidth of each edge node in the returnable source edge node set;
and determining a source-returnable edge node of the target edge node according to the residual bandwidth.
optionally, the determining, according to the remaining bandwidth, a returnable source edge node of the target edge node includes:
Determining the edge node with the most residual bandwidth as a returnable source edge node of the target edge node;
Or the like, or, alternatively,
Calculating the ratio of the residual bandwidth of each edge node in the returnable source edge nodes to the total bandwidth of the edge nodes according to the residual bandwidth;
and determining the edge node corresponding to the maximum ratio as a returnable source edge node of the target edge node.
Optionally, the method further includes:
And sending the identification information of each edge node contained in the returnable source edge node set to the target edge node, so that the target edge node determines one edge node from the edge nodes corresponding to the received identification information as the returnable source edge node of the target edge node.
An edge node determination apparatus applied to a scheduler in a content distribution network system, the content distribution network system comprising: at least one edge node and a scheduler; the device comprises:
A receiving module, configured to receive a source returning request sent by a target edge node, where the source returning request at least includes identification information of the target edge node and identification information of a user request content;
a first determining module, configured to determine, according to the identification information of the target edge node and the identification information of the user request content, a returnable source edge node set including the user request content;
A second determining module, configured to determine an edge node from the set of resilient source edge nodes as a resilient source edge node of the target edge node.
Optionally, the first determining module is specifically configured to:
Determining a first edge node set according to the identification information of the target edge node and a preset determination rule;
Determining a returnable source edge node set containing the user request content from the first edge node set according to the identification information of the user request content; or the like, or, alternatively,
Determining a second edge node set containing the user request content according to the identification information of the user request content;
And determining a returnable source edge node set from the second edge node set according to the identification information of the target edge node and the preset determination rule.
optionally, the second determining module includes:
an obtaining submodule, configured to obtain a remaining bandwidth of each edge node in the returnable source edge node set;
and the second determining submodule is used for determining the returnable source edge node of the target edge node according to the residual bandwidth.
optionally, the second determining submodule is specifically configured to:
determining the edge node with the most residual bandwidth as a returnable source edge node of the target edge node;
Or the like, or, alternatively,
Calculating the ratio of the residual bandwidth of each edge node in the returnable source edge nodes to the total bandwidth of the edge nodes according to the residual bandwidth;
And determining the edge node corresponding to the maximum ratio as a returnable source edge node of the target edge node.
optionally, the apparatus further comprises:
a sending module, configured to send the identification information of each edge node included in the resilient source edge node set to the target edge node, so that the target edge node determines an edge node from the edge nodes corresponding to the received identification information as the resilient source edge node of the target edge node.
as can be seen from the foregoing technical solutions, the method and apparatus for determining an edge node provided in the embodiments of the present invention receive a request to source from a target edge node, where the request to source at least includes identification information of the target edge node and identification information of a user request content; determining a returnable source edge node set containing the user request content according to the identification information of the target edge node and the identification information of the user request content; determining one edge node from the set of resilient source edge nodes as a resilient source edge node of the target edge node.
By applying the embodiment of the invention, the returnable source edge node is determined for the edge node, so that each edge node needing to be returned does not need to determine the returnable source edge node by self. The method can return the determination centralization of the source edge node and realize the unified management of the edge node.
Of course, it is not necessary for any product or method of practicing the invention to achieve all of the above-described advantages at the same time.
Drawings
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flowchart of a method for determining an edge node according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of another edge node determining method according to an embodiment of the present invention;
Fig. 3 is a schematic structural diagram of an edge node determining apparatus according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of another edge node determining apparatus according to an embodiment of the present invention.
Detailed Description
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a method and a device for determining edge nodes, which are applied to a dispatcher in a content distribution network system, wherein the content distribution network system comprises the following components: at least one edge node and a scheduler, each described in detail below.
referring to fig. 1, fig. 1 is a schematic flow chart of a method for determining an edge node according to an embodiment of the present invention, including the following steps:
s101, receiving a source returning request sent by a target edge node.
Specifically, the back-source request is a request for acquiring a location of a back-source edge node, which is sent by a target edge node that needs to perform back-source to a scheduler in the content distribution network system. The source return request at least comprises identification information of a target edge node and identification information of user request content, and a network area where the target edge node is located can be determined according to the identification information of the target edge node, so that edge node information in the same network area with the target edge node can be obtained; according to the identification information of the user request content, the request content of the target user can be determined, and then the dispatcher can obtain the returnable source edge node storing the user request content.
s102, determining a returnable source edge node set containing the user request content according to the identification information of the target edge node and the identification information of the user request content.
specifically, determining a returnable source edge node set containing user request content according to the identification information of the target edge node and the identification information of the user request content may have various implementation manners, for example:
determining a first edge node set according to the identification information of the target edge node and a preset determination rule;
Determining a returnable source edge node set containing the user request content from the first edge node set according to the identification information of the user request content; or the like, or, alternatively,
determining a second edge node set containing the user request content according to the identification information of the user request content;
And determining a returnable source edge node set from the second edge node set according to the identification information of the target edge node and a preset determination rule.
It should be noted that, according to the identification information of the target edge node and the preset determination rule, the edge node information in the same network area as the target edge node and the communication state between each edge node can be obtained, so as to ensure that the determined edge node is in a normal operation state and can respond to the request in time, where the preset determination rule is a rule formed based on a scheduling algorithm, and belongs to the prior art, and details are not described here.
For example, the target edge node is determined to be in the network area a according to the identification information of the target edge node, the preset determination rule is a rule formed based on a scheduling algorithm of a link, and further, link information between edge nodes in the network area a is acquired through a link detection method based on the scheduling algorithm of the link, so that the edge node in the network area a in a normal operation state is determined. Forming a first edge node set { a, b, c, d }, and determining a returnable source edge node set { b, c } containing the user request content from the first edge node according to the identification information of the user request content; or, according to the identification information of the user request content, determining a second edge node set { b, c, e, f } containing the user request content, and according to the identification information of the target edge node and a preset determination rule formed based on a link scheduling algorithm, determining an edge node set { b, c } which is located in the target edge node network area a and is in a normal operation state in the second edge node set, namely, the returnable edge node set.
Therefore, by applying the embodiment of the invention, the determined returnable source edge node can be ensured to be in a normal operation state on the basis of ensuring that the returnable source edge node contains the user request content, so that the condition that the determined returnable source edge node is a fault node is avoided, and the determined returnable source edge node can respond to the request in time.
s103, determining an edge node from the returnable source edge node set as a returnable source edge node of the target edge node.
further, determining an edge node from the returnable source edge node set as a returnable source edge node of the target edge node, where a residual bandwidth of each edge node in the returnable source edge node set needs to be obtained; and determining a returnable source edge node of the target edge node according to the residual bandwidth.
in practical application, the returnable source edge node of the target edge node is determined according to the remaining bandwidth, and there may be various implementation manners, for example:
Determining the edge node with the most residual bandwidth as a returnable source edge node of the target edge node; alternatively, the first and second electrodes may be,
And calculating the ratio of the residual bandwidth of each edge node in the returnable source edge nodes to the total bandwidth of the edge node according to the residual bandwidth, and determining the edge node corresponding to the maximum ratio as the returnable source edge node of the target edge node.
It should be noted that, for the case that the remaining bandwidth of a plurality of edge nodes occurs or the ratio of the remaining bandwidth to the total bandwidth of the edge node itself is the same, one edge node may be randomly selected from the edge nodes, and determined as the returnable source edge node of the target edge node.
Supposing that the known returnable source edge node set comprises four edge nodes a, b, c and d, the residual bandwidth of the edge node a is 1Mbps, and the total bandwidth is 10 Mbps; the residual bandwidth of the edge node b is 2Mbps, and the total bandwidth is 10 Mbps; the residual bandwidth of the edge node c is 3Mbps, and the total bandwidth is 20 Mbps; the residual bandwidth of the edge node d is 4Mbps, and the total bandwidth is 20 Mbps. Therefore, the edge node d with the most residual bandwidth is determined as the returnable source edge node of the target edge node; or, the ratios of the remaining bandwidths of the four edge nodes a, b, c, and d to the total bandwidth of the edge nodes are calculated respectively, and the corresponding ratios are obtained as follows: 0.1, 0.2, 0.15, 0.2, the edge nodes corresponding to the maximum ratio are b and d, therefore, one of the edge nodes b and d is randomly selected and determined as the returnable source edge node of the target edge node.
Therefore, by applying the edge node determining method provided by the embodiment of the invention, the returnable source edge node is determined for the edge node needing to be returned to the source, so that each edge node needing to be returned to the source does not need to determine the returnable source edge node by itself. Therefore, the edge node is determined to be centralized, and the unified management of the edge nodes is realized.
Specifically, in an embodiment of the present invention, as shown in fig. 2, in the embodiment of the present invention shown in fig. 2, S104 is added on the basis of the embodiment shown in fig. 1, and the identification information of each edge node included in the returnable source edge node set is sent to the target edge node, so that the target edge node determines an edge node as the returnable source edge node of the target edge node from the edge nodes corresponding to the received identification information.
it should be noted that the scheduler sends the identification information of each edge node included in the returnable source edge node set to the target edge node, so that the target edge node may determine, by using multiple ways, one edge node from the edge nodes corresponding to the received identification information, as the returnable source edge node of the target edge node, for example:
The target edge node randomly determines an edge node as a returnable source edge node of the target edge node from the edge nodes corresponding to the received identification information;
it is assumed that edge nodes corresponding to the identification information received by the target edge node are a, b, c, and d, respectively, and therefore, the target edge node may randomly determine an edge node a as a returnable source edge node.
Alternatively, the first and second electrodes may be,
The target edge node determines an edge node as a returnable source edge node from the edge nodes corresponding to the received identification information according to the remaining bandwidth of each edge node, and the specific method is similar to the implementation method for determining the returnable source edge node according to the remaining bandwidth by the scheduler, and is not described herein again.
Specifically, the identification information of each edge node included in the resilient source edge node set is sent to the target edge node, and the target edge node can also store the identification information of each edge node in the resilient source edge node set, so that the target edge node can directly determine one edge node as the resilient source edge node of the target edge node from the edge nodes corresponding to the stored identification information in the subsequent resilient source process. Therefore, the edge node can be prevented from requesting the scheduler for the returnable source node for multiple times, which is beneficial to improving the response speed of the edge node and reducing the access pressure of the scheduler.
furthermore, considering the storage utilization rate of the edge nodes and the update cycle of the storage content of the returnable source edge node, the identification information stored by the target edge node can only have a period of validity, and after the period of validity is exceeded, the target edge node needs to send a return request to the scheduler again to obtain the identification information of the returnable source node and each edge node included in the returnable source edge node set. For example, the validity period may be set to one month, and after one month, the target edge node may resend the source request to the scheduler.
corresponding to the method embodiment shown in fig. 1, the embodiment of the present invention further provides an edge node determining apparatus.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an edge node determining apparatus according to an embodiment of the present invention, including:
a receiving module 301, configured to receive a source returning request sent by a target edge node, where the source returning request at least includes identification information of the target edge node and identification information of a user request content.
A first determining module 302, configured to determine a returnable source edge node set containing user request content according to the identification information of the target edge node and the identification information of the user request content.
in practical applications, the first determining module 302 is specifically configured to: determining a first edge node set according to the identification information of the target edge node and a preset determination rule; determining a returnable source edge node set containing the user request content from the first edge node set according to the identification information of the user request content; or, according to the identification information of the user request content, determining a second edge node set containing the user request content; and determining a returnable source edge node set from the second edge node set according to the identification information of the target edge node and the preset determination rule.
a second determining module 303, configured to determine one edge node from the set of resilient source edge nodes as a resilient source edge node of the target edge node.
The second determining module 303 in the embodiment of the present invention may include: a obtain sub-module and a second determine sub-module (not shown in fig. 3).
the obtaining submodule is used for obtaining the residual bandwidth of each edge node in the returnable source edge node set;
and the second determining submodule is used for determining the returnable source edge node of the target edge node according to the residual bandwidth.
In practical applications, the second determining submodule is specifically configured to: determining the edge node with the most residual bandwidth as a returnable source edge node of a target edge node; or, according to the residual bandwidth, calculating the ratio of the residual bandwidth of each edge node in the returnable source edge nodes to the total bandwidth of the edge nodes; and determining the edge node corresponding to the maximum ratio as a returnable source edge node of the target edge node.
therefore, by applying the edge node determining device provided by the embodiment of the invention, the returnable source edge node is determined for the edge node needing to be returned to the source, so that each edge node needing to be returned to the source does not need to determine the returnable source edge node by itself, thereby being beneficial to determining centralization of the edge nodes and realizing uniform management of the edge nodes.
Specifically, in an embodiment of the present invention, as shown in fig. 4, in the embodiment of the present invention shown in fig. 4, on the basis of the embodiment shown in fig. 3, a sending module 304 is added, configured to send identification information of each edge node included in the resilient source edge node set to the target edge node, so that the target edge node determines, from the edge nodes corresponding to the received identification information, one edge node as the resilient source edge node of the target edge node.
Therefore, the edge node determining device provided by the embodiment of the invention can realize the unified management of the edge nodes, and can prevent the edge nodes from requesting the scheduler for the source node for many times, thereby being beneficial to improving the response speed of the edge nodes and reducing the access pressure of the scheduler.
it is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
all the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
those skilled in the art will appreciate that all or part of the steps in the above method embodiments may be implemented by a program to instruct relevant hardware to perform the steps, and the program may be stored in a computer-readable storage medium, which is referred to herein as a storage medium, such as: ROM/RAM, magnetic disk, optical disk, etc.
the above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (8)
1. an edge node determination method applied to a scheduler in a content distribution network system, the content distribution network system comprising: at least one edge node and a scheduler; the method comprises the following steps:
receiving a source returning request sent by a target edge node, wherein the source returning request at least comprises identification information of the target edge node and identification information of user request content;
determining a returnable source edge node set containing the user request content according to the identification information of the target edge node and the identification information of the user request content;
determining one edge node from the set of resilient source edge nodes as a resilient source edge node of the target edge node;
determining a returnable source edge node set containing the user request content according to the identification information of the target edge node and the identification information of the user request content, including:
determining a first edge node set according to the identification information of the target edge node and a preset determination rule;
Determining a returnable source edge node set containing the user request content from the first edge node set according to the identification information of the user request content;
and the edge nodes contained in the first edge node set and the target edge node are in the same network area.
2. the method of claim 1, wherein determining an edge node from the set of resilient source edge nodes as the resilient source edge node of the target edge node comprises:
Obtaining the residual bandwidth of each edge node in the returnable source edge node set;
And determining a source-returnable edge node of the target edge node according to the residual bandwidth.
3. The method of claim 2, wherein determining a returnable source edge node of the target edge node based on the remaining bandwidth comprises:
determining the edge node with the most residual bandwidth as a returnable source edge node of the target edge node;
Or the like, or, alternatively,
Calculating the ratio of the residual bandwidth of each edge node in the returnable source edge nodes to the total bandwidth of the edge nodes according to the residual bandwidth;
and determining the edge node corresponding to the maximum ratio as a returnable source edge node of the target edge node.
4. The method of claim 1, further comprising:
And sending the identification information of each edge node contained in the returnable source edge node set to the target edge node, so that the target edge node determines one edge node from the edge nodes corresponding to the received identification information as the returnable source edge node of the target edge node.
5. an edge node determination apparatus applied to a scheduler in a content distribution network system, the content distribution network system comprising: at least one edge node and a scheduler; the device comprises:
a receiving module, configured to receive a source returning request sent by a target edge node, where the source returning request at least includes identification information of the target edge node and identification information of a user request content;
A first determining module, configured to determine, according to the identification information of the target edge node and the identification information of the user request content, a returnable source edge node set including the user request content;
A second determining module, configured to determine an edge node from the set of resilient source edge nodes as a resilient source edge node of the target edge node;
The first determining module is specifically configured to:
determining a first edge node set according to the identification information of the target edge node and a preset determination rule;
Determining a returnable source edge node set containing the user request content from the first edge node set according to the identification information of the user request content;
And the edge nodes contained in the first edge node set and the target edge node are in the same network area.
6. The apparatus of claim 5, wherein the second determining module comprises:
an obtaining submodule, configured to obtain a remaining bandwidth of each edge node in the returnable source edge node set;
and the second determining submodule is used for determining the returnable source edge node of the target edge node according to the residual bandwidth.
7. the apparatus of claim 6, wherein the second determining submodule is specifically configured to:
Determining the edge node with the most residual bandwidth as a returnable source edge node of the target edge node;
or the like, or, alternatively,
Calculating the ratio of the residual bandwidth of each edge node in the returnable source edge nodes to the total bandwidth of the edge nodes according to the residual bandwidth;
and determining the edge node corresponding to the maximum ratio as a returnable source edge node of the target edge node.
8. the apparatus of claim 5, further comprising:
a sending module, configured to send the identification information of each edge node included in the resilient source edge node set to the target edge node, so that the target edge node determines an edge node from the edge nodes corresponding to the received identification information as the resilient source edge node of the target edge node.
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