CN106888270B - Method and system for back source routing scheduling - Google Patents
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- CN106888270B CN106888270B CN201710203830.8A CN201710203830A CN106888270B CN 106888270 B CN106888270 B CN 106888270B CN 201710203830 A CN201710203830 A CN 201710203830A CN 106888270 B CN106888270 B CN 106888270B
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- 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
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
Abstract
The invention discloses a method and a system for back source routing scheduling. The method comprises the following steps: the first edge node sends a request data packet to a return source routing platform according to the request content of the client; the back source routing platform receives the request data packet, calls basic information of all edge nodes, obtains back source routing information of the client request content according to the basic information and feeds back the back source routing information to the first edge node; and the first edge node acquires the request content of the client from the source station or the second edge node according to the return source routing information and feeds back the request content of the client to the client. The invention can quickly and accurately respond to the back source routing of the request domain name at the edge node through the back source routing platform, controls the edge node of each request domain name to acquire the optimal back source routing, quickly responds to the user request content, and improves the service quality.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and a system for back source routing scheduling.
Background
A Content Delivery Network (CDN) is an intelligent virtual Network based on the existing internet, which is formed by placing node servers at various places of the Network. The CDN system can redirect a request of a user to a node closest to the user in real time according to network traffic and comprehensive information such as links of each node, a load condition, a distance to the user, and response time.
Currently, a CDN system is composed of a plurality of server nodes, and the server nodes may be divided into a source station and a CDN node, where the CDN node includes a primary cache node (also referred to as an edge node), a secondary cache node, and the like. When a user sends a request, the first-level cache node closest to the user receives the request, and when the first-level cache node does not cache the request content, the first-level cache node can obtain the request content from the second-level cache by linking with the second-level cache node statically planned by the first-level cache node, or obtain the content from the source station through the second-level cache node and then return the content to the first-level cache, so that the pressure of the source station is reduced or the network quality from the edge node to the source station is improved.
In the process of implementing the embodiment of the invention, the inventor finds that the prior art has at least the following technical problems:
at present, the nodes of the second-level cache are mainly statically planned in advance, that is, the route is configured in advance, dynamic adjustment is not performed, redundancy of the second-level cache is more under normal conditions, but when the situations that a large amount of data needs to be updated, such as patch updating, new product release and the like, are met, resources are insufficient, response cannot be performed in time, dynamic adjustment is performed, and the service quality of a return source routing scheduling system is reduced.
Disclosure of Invention
In order to solve the problems in the prior art, embodiments of the present invention provide a method and a system for back source routing scheduling. The technical scheme is as follows:
in a first aspect, a method for back source routing scheduling provided in an embodiment of the present invention includes:
the first edge node sends a request data packet to a return source routing platform according to the request content of the client;
the back source routing platform receives the request data packet, calls basic information of all edge nodes, obtains back source routing information of the client request content according to the basic information and feeds back the back source routing information to the first edge node;
and the first edge node acquires the request content of the client from the source station or the second edge node according to the return source routing information and feeds back the request content of the client to the client.
Optionally, the request packet includes a request domain name, first edge node information, and source station information; the basic information comprises rated bandwidth information of all edge nodes, the utilization ratio of the bandwidth available to the edge nodes and the bandwidth available to the secondary cache of all edge nodes, real-time traffic bandwidth information of all edge nodes, and real-time network detection quality information among all edge nodes.
Optionally, the method further comprises:
when client request content is cached in the first edge node, the client request content is sent to the client;
when the client request content is not cached in the first edge node, judging whether the local cache has the unexpired return source routing information of the client request content;
when the unexpired return source routing information of the client request content exists in the local cache, the first edge node obtains the client request content from the source station or the second edge node according to the return source routing information;
and when the unexpired return source routing information of the client request content does not exist in the local cache, the first edge node sends a request data packet to the return source routing platform.
Optionally, the obtaining, by the first edge node, the client request content from the second edge node according to the back source routing information includes:
judging whether the second edge node caches the client request content or not,
when the second edge node caches the client request content, the second edge node sends the request content to the first edge node;
and when the second edge node does not cache the client request content, the second edge node acquires the client request content from the source station and feeds back the client request content to the first edge node.
Optionally, the method further comprises:
and caching the acquired client request content, the source return routing information and the effective time of the source return routing information by the first edge node.
In a second aspect, an embodiment of the present invention provides a system for back source routing scheduling, including: the system comprises a source return routing platform and a plurality of edge nodes, wherein the edge nodes at least comprise a first edge node and a second edge node;
the first edge node is used for sending a request data packet to the back source routing platform according to the request content of the client, sending back source routing information of the request content of the client to the source station or the second edge node to obtain the request content of the client and feeding back the request content of the client to the client;
and the source return routing platform is used for receiving the request data packet, calling the basic information of all the edge nodes, acquiring source return routing information of the request content of the client according to the basic information and feeding back the source return routing information to the first edge node.
Optionally, the first edge node is further configured to:
when client request content is cached in the first edge node, the client request content is sent to the client;
when the client request content is not cached in the first edge node, judging whether the local cache has the return source routing information which is not expired of the client request content,
when the unexpired return source routing information of the client request content exists in the local cache, the first edge node obtains the client request content from the source station or the second edge node according to the return source routing information.
Optionally, the second edge node is further configured to:
judging whether the second edge node caches the client request content or not,
when the second edge node caches the client request content, the second edge node sends the client request content to the first edge node;
and when the second edge node does not cache the client request content, the second edge node acquires the client request content from the source station and feeds back the client request content to the first edge node.
Optionally, the first edge node is further configured to:
and caching the acquired client request content, the source return routing information and the effective time of the source return routing information.
Optionally, the method further comprises:
and the basic data node is used for providing basic information of all edge nodes for the back source routing platform, wherein the basic information comprises rated bandwidth information of all the edge nodes, the utilization ratio of the bandwidth which can be used by all the edge nodes to the bandwidth which can be used by the secondary cache, real-time flow bandwidth information of all the edge nodes and real-time network detection quality information among all the edge nodes.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
according to the method and system for back source routing scheduling provided by the embodiment of the invention, the back source routing platform is used for calling the basic information of all edge nodes according to the request data packet sent by the edge node, and then the back source routing information of the client request content is obtained according to the basic information, so that the back source routing of the client request content at the edge node can be quickly and accurately responded, all the edge nodes including the first edge node and the second edge node are equal relative to the client, the node configuration can also be equal, the first level cache can be used, and meanwhile, the back source routing platform can dynamically adjust some edge nodes (for example, the second edge node) to be used as the second level cache. Therefore, the client request content can obtain the optimal return source routing at the edge node, the client request content is responded quickly, and the service quality is improved. Meanwhile, the situations of more secondary cache redundancy and insufficient resources of static planning in the prior art are avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for a user of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart of a method for back source routing according to an embodiment of the present invention;
FIG. 2 is a flowchart of a first edge node obtaining request content from a second edge node according to a back source routing information according to an embodiment of the present invention;
FIG. 3 is a flow chart of another method for source return routing provided by an embodiment of the present invention;
FIG. 4 is a flow chart of another method of return source routing provided by an embodiment of the present invention;
FIG. 5 is a flow chart of a system for back source routing according to an embodiment of the present invention;
fig. 6 is a flowchart of another system for back source routing according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The embodiment of the invention provides a method for back source routing scheduling, which can be applied to a Content Delivery Network (CDN). The method is executed in the execution process and comprises a back source routing platform, a basic data center and a plurality of content cache servers, wherein each content cache server in the CDN is in an equal relation, and according to the scheduling of the back source routing platform, each content cache server in all the content cache servers can be used as an edge node of the CDN and can also be used as a secondary cache of the CDN when the back source routing platform carries out back source routing.
The process flow shown in fig. 1-5 will be described in detail below with reference to the following embodiments, which may be as follows:
In the embodiment, the client sends a request to the nearest content cache server to obtain the content requested by the client, and the method for routing and scheduling the returned source takes the cache server receiving the content requested by the client as a first edge node; and the first edge node sends a request data packet to the return source routing platform according to the request content of the client.
The content in the request packet includes source station information (including real-time information of domain names or IPs and ports of one or more source servers), request URL (Uniform resource Locator) information, or request domain names and first edge node information.
And 200, receiving the request data packet by the back source routing platform, calling basic information of all edge nodes, acquiring back source routing information of the request content of the client according to the basic information, and feeding back the back source routing information to the first edge node. In this embodiment, the basic information includes nominal bandwidth information of all edge nodes, a utilization ratio of bandwidth available to the edge nodes and bandwidth available to the secondary cache of all edge nodes, real-time traffic bandwidth information of all edge nodes, and real-time network probing quality information between all edge nodes.
For example, the source return routing platform obtains the source return routing information of the client request content according to the basic information, specifically:
1, obtaining the bandwidth percentage of all edge nodes, that is, the rated bandwidth information of all edge nodes, assuming that all CDN nodes are node1, node2, node3, … …, node, (from node1 to node): p1, p2, p3, … …, pN;
2, obtain the utilization ratio of the bandwidth available to the edge node and the bandwidth available to the secondary cache for all edge nodes (from node1 to node N): p _ bw1, p _ bw2, p _ bw3, … …, p _ bwN;
and 3, acquiring real-time traffic bandwidth information of all edge nodes (from node1 to node N): r _ bw1, r _ bw2, r _ bw3, … …, r _ bwN;
acquiring real-time network probing quality information (from node1 to node N) among all edge nodes: ori _ qs1, ori _ qs2, ori _ qs3, … …, ori _ qsN; including the network quality from node1 (first edge node) to other edge nodes (from node2 to node n): node _ qs2, node _ qs3, … …, node _ qsN;
5, obtaining a List < nodes > < func1(List < p1.. pN >, List < p _ bw1.. p _ bwN >, List < r _ bw1.. r _ bwN >) of potential second edge nodes according to the steps 1, 2, and 3;
6, according to the information obtained in step 4 and the information obtained in step 5, further obtaining the back source routing information from node1 to List < nodes >
List<routes>＝func2(List<nodes>,List<ori_qs1....ori_qsN>,List<node_qs1...node_qsN>)。
The back source routing information comprises basic information of a second edge node and cache effective time of client request content, when no edge node caches the effective client request content, the back source routing information comprises the basic information of a source station, and a first edge node can only go to the source station to obtain the client request content. The second edge node is the edge node cached with the client request content, and the basic information of the second edge node is included in the back source routing information.
And step 300, the first edge node obtains the request content of the client from the source station or the second edge node according to the return source routing information, and feeds back the request content of the client to the client.
In this embodiment, the first edge node determines the request path according to the basic information of the second edge node or the basic information of the source station included in the return source routing information, obtains the request content of the client from the second edge node or the source station according to the request path, and feeds back the obtained request content of the client to the client.
Referring to fig. 2, optionally, the obtaining, by the first edge node, the request content from the second edge node according to the back source routing information includes:
In this embodiment, when the second edge node does not cache the client request content, that is, the source return routing information sent by the source return routing platform is incorrect, and to prevent that the request content cannot be obtained, step 330 is performed, and the second edge node obtains the request content from the source station.
The second edge node can cache the acquired client request content so that other edge nodes can access the client request content again.
Referring to fig. 3, the method for back source routing scheduling provided in the embodiment of the present invention further includes:
judging whether the first edge node caches the client request content, specifically comprising:
in this embodiment, when the client request content is cached in the first edge node, the client request content may be directly fed back to the client.
When the unexpired return source routing information of the client request content does not exist in the local cache, the step 100 is entered, and the first edge node sends a request data packet to the return source routing platform.
Referring to fig. 4, optionally, the method for back source routing scheduling provided in the embodiment of the present invention further includes:
in step 400, the first edge node caches the acquired client request content, the source return routing information, and the effective time of the source return routing information.
In this embodiment, the first edge node caches the acquired client request content, the source return routing information, and the validation time of the source return routing information, and when other edge nodes access the first edge node according to the source return routing information sent by the source return routing platform, the first edge node can be used as a second edge node of other edge nodes. Therefore, the edge nodes in the method for back source routing scheduling provided by this embodiment are all peer-to-peer.
The method for back source routing scheduling provided in the embodiments of the present invention retrieves, according to a request packet sent by an edge node, basic information of all edge nodes through a back source routing platform, and then obtains back source routing information of client request content according to the basic information, so as to quickly and accurately respond to back source routing of the client request content at the edge nodes, where all edge nodes, including a first edge node and a second edge node, are both equal to each other with respect to a client, and the node configurations are also equal to each other, and can serve as a first-level cache, and at the same time, the back source routing platform can dynamically adjust some edge nodes (for example, the second edge node) as a second-level cache. Therefore, the client request content can obtain the optimal return source routing at the edge node, the client request content is responded quickly, and the service quality is improved. Meanwhile, the situations of more secondary cache redundancy and insufficient resources of static planning in the prior art are avoided.
Based on the same technical concept, an embodiment of the present invention further provides a system for back source routing scheduling, which is shown in fig. 5 and includes: the system comprises a source return routing platform and a plurality of edge nodes, wherein the edge nodes at least comprise a first edge node and a second edge node;
the first edge node is used for sending a request data packet to the back source routing platform according to the request content of the client, sending back source routing information of the request content of the client to the source station or the second edge node to obtain the request content of the client and feeding back the request content of the client to the client;
and the source return routing platform is used for receiving the request data packet, calling the basic information of all the edge nodes, acquiring source return routing information of the request content of the client according to the basic information and feeding back the source return routing information to the first edge node.
Optionally, the first edge node is further configured to:
and when the client request content is cached in the first edge node, sending the client request content to the client.
When the client request content is not cached in the first edge node, judging whether the local cache has the return source routing information which is not expired of the client request content,
and when the unexpired return source routing information corresponding to the client request content exists in the local cache, the first edge node acquires the client request content from the source station or the second edge node according to the return source routing information.
Optionally, the second edge node is further configured to:
judging whether the second edge node caches the client request content or not,
when the second edge node caches the client request content, the second edge node sends the client request content to the first edge node;
and when the second edge node does not cache the client request content, the second edge node acquires the client request content from the source station and feeds back the client request content to the first edge node.
Optionally, the first edge node is further configured to:
and caching the acquired client request content, the source return routing information and the effective time of the source return routing information.
Referring to fig. 6, optionally, the method further includes:
and the basic data node is used for providing basic information of all edge nodes for the back source routing platform, wherein the basic information comprises rated bandwidth information of all the edge nodes, the utilization ratio of the bandwidth which can be used by all the edge nodes to the bandwidth which can be used by the secondary cache, real-time flow bandwidth information of all the edge nodes and real-time network detection quality information among all the edge nodes.
In this embodiment, the basic data node is a basic data center.
The system for back source routing scheduling provided in the embodiment of the present invention retrieves, according to a request packet sent by an edge node, basic information of all edge nodes through a back source routing platform, and then obtains back source routing information of client request content according to the basic information, so as to quickly and accurately respond to back source routing of the client request content at the edge node, where all edge nodes, including a first edge node and a second edge node, are both equal to each other with respect to the client, and the node configurations are also equal to each other, and can serve as a first-level cache, and at the same time, the back source routing platform can dynamically adjust some edge nodes (for example, the second edge node) as a second-level cache. Therefore, the client request content can obtain the optimal return source routing at the edge node, the client request content is responded quickly, and the service quality is improved.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
It is also noted that the term "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A method for back source routing, the method comprising:
judging whether a client request content is cached in a first edge node, and when the client request content is not cached in the first edge node and unexpired return source routing information of the client request content does not exist in a local cache, the first edge node sends a request data packet to a return source routing platform according to the client request content;
the back source routing platform receives the request data packet, calls basic information of all edge nodes, obtains back source routing information of the client request content according to the basic information, and feeds back the back source routing information to the first edge node, wherein all the edge nodes are equal to the client, and the nodes are configured to be equal to each other so that the back source routing platform can dynamically adjust the edge nodes to be a first-level cache or a second-level cache;
and the first edge node acquires the client request content from a source station or a second edge node according to the return source routing information and feeds back the client request content to the client.
2. The method of claim 1, wherein the request packet includes a request domain name, first edge node information, and source station information; the basic information comprises rated bandwidth information of all edge nodes, the utilization ratio of the bandwidth which can be used by all edge nodes to the bandwidth which can be used by a secondary cache, real-time flow bandwidth information of all edge nodes and real-time network detection quality information among all edge nodes.
3. The method of claim 1, further comprising:
when the client request content is cached in the first edge node, sending the client request content to the client;
when the client request content is not cached in the first edge node, judging whether unexpired return source routing information of the client request content exists in a local cache or not;
when the unexpired return source routing information of the client request content exists in a local cache, the first edge node obtains the client request content from a source station or a second edge node according to the return source routing information;
and when the unexpired return source routing information of the client request content does not exist in the local cache, the first edge node sends the request data packet to the return source routing platform.
4. The method of claim 1 or 3, wherein the first edge node obtains the client request content from the second edge node according to the back source routing information, comprising:
judging whether the second edge node caches the client request content or not,
when the second edge node caches the client request content, the second edge node sends the client request content to the first edge node;
and when the second edge node does not cache the client request content, the second edge node acquires the client request content from the source station and feeds back the client request content to the first edge node.
5. The method of claim 1, further comprising:
and the first edge node caches the acquired client request content, the back source routing information and the effective time of the back source routing information.
6. A system for back source routing, comprising: the system comprises a return source routing platform and a plurality of edge nodes, wherein the edge nodes at least comprise a first edge node and a second edge node, all the edge nodes are equal to each other relative to a client, and the nodes are configured to be equal to each other so that the return source routing platform can dynamically adjust the edge nodes to be a first-level cache or a second-level cache;
the first edge node is used for judging whether client request content is cached in the first edge node, when the client request content is not cached in the first edge node and unexpired return source routing information of the client request content does not exist in a local cache, sending a request data packet to the return source routing platform according to the client request content, obtaining the client request content from a source station or a second edge node according to the return source routing information of the client request content, and feeding the client request content back to the client;
and the back source routing platform is used for receiving the request data packet, calling basic information of all edge nodes, acquiring back source routing information of the client request content according to the basic information and feeding back the back source routing information to the first edge node.
7. The system of claim 6, wherein the first edge node is further configured to:
when the client request content is cached in the first edge node, sending the client request content to the client;
when the client request content is not cached in the first edge node, judging whether unexpired return source routing information of the client request content exists in a local cache or not;
when the unexpired return source routing information of the client request content exists in a local cache, the first edge node obtains the client request content from a source station or a second edge node according to the return source routing information;
and when the unexpired return source routing information of the client request content does not exist in the local cache, the first edge node sends the request data packet to the return source routing platform.
8. The system of claim 6, wherein the second edge node is further configured to:
judging whether the second edge node caches the client request content or not,
when the second edge node caches the client request content, the second edge node sends the client request content to the first edge node;
and when the second edge node does not cache the client request content, the second edge node acquires the client request content from the source station and feeds back the client request content to the first edge node.
9. The system of claim 6, wherein the first edge node is further configured to:
caching the acquired client request content, the back source routing information and the effective time of the back source routing information.
10. The system of claim 6, further comprising:
and the basic data node is used for providing basic information of all edge nodes for the back source routing platform, wherein the basic information comprises rated bandwidth information of all the edge nodes, the utilization ratio of the bandwidth which can be used by all the edge nodes to the bandwidth which can be used by the secondary cache, real-time flow bandwidth information of all the edge nodes and real-time network detection quality information among all the edge nodes.
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| CN106375471A (en) * | 2016-09-29 | 2017-02-01 | 北京奇艺世纪科技有限公司 | Edge node determination method and device |
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