CN105516238B - Data request method, device, node server and CDN system - Google Patents
Data request method, device, node server and CDN system Download PDFInfo
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- CN105516238B CN105516238B CN201510816506.4A CN201510816506A CN105516238B CN 105516238 B CN105516238 B CN 105516238B CN 201510816506 A CN201510816506 A CN 201510816506A CN 105516238 B CN105516238 B CN 105516238B
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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
- H04L67/60—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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0659—Management of faults, events, alarms or notifications using network fault recovery by isolating or reconfiguring faulty entities
- H04L41/0661—Management of faults, events, alarms or notifications using network fault recovery by isolating or reconfiguring faulty entities by reconfiguring faulty entities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
- H04L45/021—Ensuring consistency of routing table updates, e.g. by using epoch numbers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
- H04L45/745—Address table lookup; Address filtering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
- H04L63/101—Access control lists [ACL]
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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
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
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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
Abstract
The invention discloses a kind of data request method, the method is applied in the node router in content distributing network CDN system, which comprises receives linking request by this service processes；Judge that this service processes of local node server are recorded with the presence or absence of the information of the content of the linking request, and if it exists, then obtain the content；Otherwise judge that other service processes of local node server are recorded with the presence or absence of the information of the content of the linking request, and if it exists, then obtain the content；Otherwise superior node server obtains the content of the linking request；Linking request described in the content response based on acquisition.Data request method disclosed by the invention can optimize the routing of CDN node content, avoid the identical content with the different service processes superior node server repetitive requests of server, effectively reduce link bandwidth consumption.The invention also discloses a kind of request of data device, node server and CDN systems.
Description
Technical field
The present invention relates to Data Disaster-Tolerance Technology fields, more specifically to a kind of data request method, device and section
Point server and CDN (Content Delivery Network, content distributing network) system.
Background technique
In the prior art, in order to improve CDN node server resource utilization rate, and the stability of holding service, more
Carry out the framework model that more CDN content dissemination systems uses multicore multi-process, i.e., runs multiple services on a server
Process, each service processes respectively provide content distribution service, run and be independent of each other between service processes, handle in this way, even if
Wherein some process exception will not influence other normal work processes and continue to provide stable service.For example it is regarded in internet
In frequency live broadcast service, a node server operates above 10 service processes in CDN network, and each service processes are upward alone
First nodes carry out content requests, and identical content can be respectively sent to run on same server each by even higher level of node
A service processes, then, if request content is identical, sent 10 times then identical request content is always met together to this server,
The increase of superior node load, the waste of downlink traffic are caused, the waste of server itself uplink traffic is also increased and born certainly
Lotus, simultaneously as the processing of scheduling, 10 service processes are requested to even higher level of node cluster respectively, due to dispatching,
The superior node server distributed may be different, and it is inconsistent to lead to walk routing possibility when each process requested content distribution,
It may influence service quality.
Specifically, as shown in Figure 1, it is assumed that at the beginning, service processes WorkerM in CDN node server S, service into
Information above journey WorkerN all without content Stream.When service processes WorkerM, service processes WorkerN are successively received
It is as follows to the step of when accessing linking request content Stream, being executed using the data request method of the prior art:
Service processes WorkerM above A:CDN server S receives access linking request, request content Stream；
B: service processes WorkerM access scheduling system requests superior node server address；
C: the factors such as scheduling system trade-off load, geographical location return to superior node server to service processes WorkerM
The address of B.
After D: service processes WorkerM obtains the address of superior node server B, in superior node server B request
Hold Stream, and response chains are requested；
Service processes WorkerN above E:CDN server S receives another way and accesses linking request, request content
Stream；
F: service processes WorkerN access scheduling system, request superior node server address；
G: scheduling system trade-off load, the factors such as geographical location return to superior node server to service processes WorkerN
The address of A (being in same location server cluster with superior node server B, server A may be more excellent at this time).
After H: service processes WorkerN obtains the address of superior node server A, in superior node server A request
Hold Stream, and response chains are requested.
As it can be seen that in existing CDN system, under more service processes operational modes, since each service processes can be to
Superior node server request content will cause superior node server in book server in the identical situation of request content
The repetition of appearance is sent, and wastes uplink and downlink flow, and increase load.
In some CDN service quotient, solves the problems, such as above-mentioned repetitive requests content by technological means, such as servicing
Agent process is disposed on device is responsible for the content requests iterative process being locally-downloaded between process and superior node cluster specially,
After downloading process receives link, all downloading process elder generations access agent, agency's foundation requests access to superior node cluster server,
After superior node acquisition content success requesting node is locally-downloaded by acting on behalf of, due to this in content distribution to all by agency
All downloading process in ground will access proxy process, this be easy to cause agent process single-point load too high, to reduce server
Utilization rate, and development and agency scheduler module is wanted, to cause cost increase and maintenance difficulties to increase, thus practical effect
It is bad, while if agent process is abnormal failure, all decline processes cannot all continue offer service, be unfavorable for
Risk control.
Summary of the invention
The object of the present invention is to provide a kind of data request method, device, node server and CDN systems, can optimize
The routing of CDN node content avoids the identical content with the different service processes superior node server repetitive requests of server,
Effectively reduce link bandwidth consumption.
The embodiment of the invention provides a kind of data request method, the method is applied to content distributing network CDN system
In node router in, which comprises
Linking request is received by this service processes；
Judge that this service processes of local node server are recorded with the presence or absence of the information of the content of the linking request, if
In the presence of then obtaining the content；Otherwise
Judge that other service processes of local node server are recorded with the presence or absence of the information of the content of the linking request,
If it exists, then the content is obtained；Otherwise
Superior node server obtains the content of the linking request；
Linking request described in content response based on acquisition.
As an improvement of the above scheme, when judging local node server, there are the information of the content of linking request notes
When other service processes of record are no less than one, then the service processes of the linking request minimum number of selection content described in come
Obtain the content.
As an improvement of the above scheme, local section is judged by inquiring the independent content routing table of this service processes maintenance
Information record of this service processes of point server with the presence or absence of the content of the linking request；Wherein, the independent content road
The information of each content of corresponding service processes is recorded by table.
As an improvement of the above scheme, judged by inquiring the global content routing table that all service processes are safeguarded jointly
Information record of other service processes of local node server with the presence or absence of the content of the linking request；Wherein, described complete
The linking request quantity and access of each content of each service processes of office's content routing table record local node router
Location.
As an improvement of the above scheme, judged by inquiring the global content routing table that all service processes are safeguarded jointly
When local node server is no less than one there are other service processes that the information of the content of the linking request records, then select
The service processes of the linking request minimum number of the content described in are selected, and are redirected described in acquisition by corresponding access address
Content.
As an improvement of the above scheme, in this service processes for judging local node server, there are the linking requests
After the information of content records and obtains the content, further includes:
The linking request quantity of the content of minute book service processes in the global content routing table is added 1, with more
The new global content routing table.
As an improvement of the above scheme, in other service processes for judging local node server, there are the linking requests
Content information record and obtain the content after, further includes:
The global content routing table is updated, the linking request of the content of the service processes of the content will be acquired
Quantity adds 1, while the access address of this service processes being recorded in described and is held, and initializing linking request quantity is 1；
The independent content routing table for updating this service processes increases the information record of the content.
As an improvement of the above scheme, the superior node server obtains the content of the linking request specifically:
Access scheduling system, the address of request superior node server；
The superior node server address that the scheduling system returns is received, and according to the superior node server address
To the content of linking request described in the superior node server request.
As an improvement of the above scheme, after the content that superior node server obtains the linking request, further includes:
The independent content routing table for updating this service processes increases the information record of the content；
The global content routing table is updated, increases this service processes to the linking request of the content, initialization link
Number of requests is 1, and the access address of this service processes is recorded in described and is held.
As an improvement of the above scheme, further includes:
When any service processes of local node service occur abnormal, then pass through managing process to the global content road
It is updated by table, to remove the linking request quantity and access address of each content of exception service process.
The embodiment of the present invention is corresponding to provide a kind of request of data device, and described device is applied to content distributing network CDN
In node router in system, described device includes:
Linking request receiving module, for receiving linking request by this service processes；
First execution module, for judging this service processes of local node server with the presence or absence of the linking request
The information of content records；If it exists, then the content is obtained；
Second execution module, for judging this service processes of local node server in the first execution module, there is no institutes
Under the information record case for stating the content of linking request, judge other service processes of local node server with the presence or absence of described
The information of the content of linking request records, and if it exists, then obtains the content；
Third execution module, for judging that other service processes of local node server are not present in the second execution module
Under the information record case of the content of the linking request, the content of the linking request is obtained in superior node server；
Respond module, linking request described in the content response based on acquisition.
As an improvement of the above scheme, second execution module is further used for: when judging that local node server deposits
When other service processes of the information record of the content of the linking request are no less than one, then the content described in is selected
The service processes of linking request minimum number obtain the content.
As an improvement of the above scheme, the independent content road that first execution module is safeguarded by inquiring this service processes
Judge that this service processes of local node server are recorded with the presence or absence of the information of the content of the linking request by table；Its
In, the independent content routing table records the information of each content of corresponding service processes.
As an improvement of the above scheme, the overall situation that second execution module is safeguarded jointly by inquiring all service processes
Content routing table judges other service processes of local node server with the presence or absence of the information of the content of the linking request
Record；Wherein, the link of each content of each service processes of the global content routing table record local node router
Number of requests and access address.
As an improvement of the above scheme, second execution module is further used for: total by inquiring all service processes
Judge what local node server was recorded there are the information of the content of the linking request with the global content routing table of maintenance
When other service processes are no less than one, then the service processes of the linking request minimum number of the content described in are selected, and led to
It crosses corresponding access address and redirects the acquisition content.
It as an improvement of the above scheme, further include the first update module, for judging local node in the first execution module
After this service processes of server record there are the information of the content of the linking request and obtain the content, by the overall situation
The linking request quantity of the content of minute book service processes adds 1 in content routing table, to update the global content routing
Table.
It as an improvement of the above scheme, further include the second update module, for judging local node in the second execution module
After other service processes of server record there are the information of the content of the linking request and obtain the content,
The global content routing table is updated, the linking request of the content of the service processes of the content will be acquired
Quantity adds 1, while the access address of this service processes being recorded in described and is held, and initializing linking request quantity is 1；With
And
The independent content routing table for updating this service processes increases the information record of the content.
As an improvement of the above scheme, the third execution module is specifically used for:
Access scheduling system, the address of request superior node server；
The superior node server address that the scheduling system returns is received, and according to the superior node server address
To the content of linking request described in the superior node server request.
It as an improvement of the above scheme, further include third update module, for being taken in third execution module superior node
After business device obtains the content of the linking request,
The independent content routing table for updating this service processes increases the information record of the content；And
The global content routing table is updated, increases this service processes to the linking request of the content, initialization link
Number of requests is 1, and the access address of this service processes is recorded in described and is held.
As an improvement of the above scheme, further includes:
Exception processing module, when any service processes for detecting local node service occur abnormal, by manage into
Journey is updated to the global content routing table, to remove the linking request quantity and visit of each content of exception service process
Ask address.
The embodiment of the invention also provides a kind of node servers, including request of data device as described above.
The embodiment of the invention also provides a kind of content distributing network CDN systems, including multiple node clothes as described above
Business device, the node server in the superior and the subordinate are communicated by scheduling system.
Compared with prior art, data request method disclosed by the invention, device, node server and CDN system pass through
When this service processes receives linking request, first determine whether that this service processes of local node server are asked with the presence or absence of the link
The information for the content asked records, and if it exists, then obtains the content directly in response to request；If it is not, then judging local node service
Information record of other service processes of device with the presence or absence of the content of the linking request, and if it exists, then obtain the content；It is no
Then superior node server obtains the content of the linking request.Therefore, data request method of the invention, device, node
Server and CDN system, under more service processes operational modes, only meeting superior node server requests identical content primary,
It avoids superior node server from sending the repetition of the identical content of local node server, saves under superior node server
Row flow reduces its load, to reduce link bandwidth consumption, avoids network oscillation, ensure that service quality.
Detailed description of the invention
Fig. 1 is the processing schematic of the data request method of content distributing network CDN system in the prior art.
Fig. 2 is a kind of flow diagram of data request method in the embodiment of the present invention.
Fig. 3 is a kind of abnormality processing schematic diagram of data request method in the embodiment of the present invention.
Fig. 4 is a kind of idiographic flow schematic diagram of data request method in the embodiment of the present invention.
Fig. 5 is the processing schematic of the data request method of the content distributing network CDN system of the embodiment of the present invention.
Fig. 6 is a kind of structural block diagram of request of data device in the embodiment of the present invention.
Fig. 7 is the structural block diagram of another request of data device in the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It referring to fig. 2, is a kind of flow diagram of data request method provided in an embodiment of the present invention.The number of the present embodiment
It is applied in the node router in content distributing network CDN system according to requesting method, the method includes the steps:
S101, linking request is received by this service processes；
S102, judge that this service processes of local node server are remembered with the presence or absence of the information of the content of the linking request
Record, and if it exists, then obtain the content (step S103)；It is no to then follow the steps
S104, judge that other service processes of local node server whether there is the information of the content of the linking request
Record, and if it exists, then obtain the content (step S105)；It is no to then follow the steps
S106, superior node server obtain the content of the linking request；And
Linking request described in S107, the content response based on acquisition.
Wherein, local node server can be any node server in content distributing network CDN system, when local section
When point server is user's access node server, local node server can receive the linking request that user equipment is sent；When
When local node server is non-user access node server, local node server can receive the transmission of other node servers
Linking request.In the present embodiment, any node server in content distributing network CDN system is all made of more service processes
Operational mode, therefore, local node server can receive linking request by any service processes (for example, this service processes).
In step s 102, specifically, judging local by the independent content routing table for inquiring the maintenance of this service processes
Information record of this service processes of node server with the presence or absence of the content of the linking request；Wherein, the independent content
Routing table records the information of each content of corresponding service processes.
In step S104, specifically, being sentenced by inquiring the global content routing table that all service processes are safeguarded jointly
Information record of other service processes of disconnected local node server with the presence or absence of the content of the linking request；Wherein, described
The linking request quantity and access of each content of each service processes of global content routing table record local node router
Address.
In addition, when judging local node service by inquiring the global content routing table that all service processes are safeguarded jointly
When device is no less than one there are other service processes that the information of the content of the linking request records, then selection is interior described in
The service processes of the linking request minimum number of appearance, and redirected by corresponding access address and obtain the content.Wherein, weight
Orientation (Redirect), which refers to, goes to other positions (such as: webpage for a various network requests again fixed direction by various methods
The variation of redirection, the redirection of domain name, Route Selection is also to data message via a kind of redirection in path.
In addition, if judging this service processes of local node server, there are the information of the content of linking request records
Further include executing step and after obtaining the content:
S1031, the linking request quantity of the content of minute book service processes in the global content routing table is added
1, to update the global content routing table.
In addition, if judging other service processes of local node server, there are the information of the content of linking request notes
After recording and obtaining the content, further comprise the steps of:
S1051, the global content routing table is updated, the chain of the content of the service processes of the content will be acquired
It connects number of requests and adds 1, while the access address of this service processes being recorded in described and is held, and initializes linking request quantity
It is 1；
S1052, the independent content routing table for updating this service processes increase the information record of the content.
In step s 106, the content that superior node server obtains the linking request specifically includes step:
S1061, access scheduling system, the address of request superior node server；
S1062, the superior node server address that the scheduling system returns is received, and according to the superior node service
Content of the device address to linking request described in the superior node server request.
In addition, further including executing step after the content that superior node server obtains the linking request:
S1063, the independent content routing table for updating this service processes increase the information record of the content；
S1064, the global content routing table is updated, increases this service processes to the linking request of the content, initially
Changing linking request quantity is 1, and the access address of this service processes is recorded in described and is held.
Therefore, in the present embodiment, any node server in content distributing network CDN system operates above multiple clothes
Business process, when this location server is accepted the interview hyperlink request by this service processes, this service processes is according in linking request
Hold, according to this service processes or other service processes of local node server, whether there is or not the request contents, provide different contents and visit
It asks the way diameter:
(1) inquire the content routing table of this service processes maintenance first, substantial information record then directly in response to request,
Global content routing table is updated simultaneously, the access link number of the corresponding content of this service processes is increased by 1；
(2) if the content routing table of this service processes maintenance is recorded without the information of corresponding content, local node is accessed
The local global content routing table of all service processes maintenances of server, whether inquiry other service processes of local node server
The content has been obtained to local node server；
If there is other multiple service processes obtain the content to local node server, then local global content road is traversed
By table, selection has the content and access linking request minimum number service processes, obtains its access path, passes through redirection
It obtains access content and passes through global routing table, linking request access path at this point, changing the access path of linking request
Are as follows: request-> this service processes-> local node server overall situation routing table-> other service processes, corresponding content point
Hair routing are as follows: other service processes-> this service processes change linking request access from the point of view of network request access path
Path is redirection process, also changes the path of content distribution accordingly, and contents routing path is changed；
If only one other example service processes obtains content to locally, then the process is selected, its access path is obtained,
Access content is obtained by redirecting；
It, can respond request (distribution content) after obtaining the content to this service processes success；Meanwhile it updating in the overall situation
Hold routing table, the linking request quantity of the content for the service processes for being acquired the content is added 1, and by this service processes
Access address be recorded in it is described in hold, and initialize linking request quantity be 1；And update the independent interior of this service processes
Hold routing table, increases the information record of the content.
(3) if access content does not arrive local node server, access scheduling system, the request of superior node server
Content requests access to path are as follows: request-> this service processes-> scheduling system-> superior node server, it is corresponding
Content distribution routing are as follows: superior node server-> this service processes；
It, can respond request (distribution content) after obtaining the content to this service processes success；Meanwhile updating this service processes
Independent content routing table, increase the content information record；And the global content routing table is updated, increase this service
For process to the linking request of the content, initialization linking request quantity is 1, and the access address of this service processes is recorded in
It is held in described, when new hyperlink request reaches next time, for other process queried accesses.
In addition, selection has the service processes of content and the access to content linking request minimum number to make requests content money
Source is to be evenly distributed to access link respectively as far as possible to realize that access links to be supported between each process and realize equilibrium
Above a case process, process single-point load too high is avoided the problem that.
In the present embodiment, it is preferred that further include abnormality processing step, comprising:
When any service processes of local node service occur abnormal, then pass through managing process to the global content road
It is updated by table, to remove the linking request quantity and access address of each content of exception service process.
Specifically, as shown in figure 3, if some service processes in local node server are (for example, service processes
WorkerA) there is exception, then from managing process to global content routing table more new information, exception service process occurs in removing
The content information of WorkerA records (the linking request quantity and access address of each content of exception service process), thus disconnected
The service processes (for example, service processes WorkerB) of other normal works and linking for abnormal process WorkerA are opened, meanwhile, this
Other service processes worked normally in ground node server update the independent content routing table of therein independent maintenance, clearly
Except the abnormal process content information of oneself access, makes new link no longer access exception process, reduce the influence of abnormal process, health
The information record of process is then unaffected, can continue to provide normal content distribution service.
With reference to Fig. 4, the realization of detailed description of the present invention data request method is carried out below by a specific embodiment
Journey.Likewise, the data request method of the present embodiment is applied in the node router in content distributing network CDN system, use
In optimization CDN node content routing, route optimization process includes step:
The service processes WorkerN acquisition of S201, local node server S execute timeslice, start to receive link, link
To service processes WorkerN request content resource Stream；
S202, service processes WorkerN inquire the independent content routing table of this service processes maintenance；Wherein, described independent
Content routing table records the information of each content of corresponding service processes；
S203, judge whether this service processes has content resource Stream；If WorkerN has content resource
Stream thens follow the steps S218, updates global content routing table, by the linking request quantity of the content of this service processes
Add 1, and skips to and execute step S221；If WorkerN does not have content resource Stream, S205 is thened follow the steps；
S205, the global content routing table for inquiring local node server；Wherein, the global content routing table minute book
The linking request quantity and access address of each content of each service processes of ground node router；
S206, judge whether other service processes have registration content resource by inquiring global content routing table
Stream；If there is the register information of content Stream in global content routing table, S208 is thened follow the steps；If global content routing
Register information without content Stream in table, thens follow the steps S215；
S208, the corresponding register information of the content in global content routing table is traversed, found in service processes WorkerM
The linking request minimum number of content Stream is accessed above；
S209, inquiry and the access address for obtaining service processes WorkerM；
S210, service processes WorkerN are redirected to process WorkerM, request content Stream according to access address；
S211, judge whether request content Stream succeeds；If failure, thens follow the steps S212；If success, holds
Row step S213；
S212, respond request, request failure；And terminate.
S213, global content routing table is updated, the linking request quantity of the content Stream of service processes WorkerM is added
1, while the access address of service processes WorkerN being recorded under content Stream, and initializing linking request quantity is 1；
S214, the independent content routing table for updating service processes WorkerN increase the information record of content Stream；It jumps
To execution S221；
S215, service processes WorkerN access scheduling system, the address of request superior node server；
S216, service processes WorkerN carry out content requests acquisition according to the address superior node that scheduling system returns
Content Stream；
S217, judge whether request content Stream succeeds；If failure, thens follow the steps S212；If success, holds
Row step S219；
S219, the independent content routing table for updating service processes WorkerN increase the information record of content Stream；
S220, the global content routing table is updated, increases service processes WorkerN and the link of content Stream is asked
It asks, initialization linking request quantity is 1, and the access address of service processes WorkerN is recorded under content Stream；
S221, respond request distribute content Stream.
New hyperlink request repeats above-mentioned steps.
In the embodiment of the present invention, by maintenance content routing table, comprising inside service processes independent content routing table with
All process instances access the global content routing table of maintenance jointly, load in conjunction with the link to request content of each service processes
Information changes its access to content path, access to content path can be made optimal by the linking request of access by way of redirection
Change.
With reference to Fig. 5, it is assumed that at the beginning, service processes WorkerM, service processes WorkerN in CDN node server S
Information all without content Stream above.When service processes WorkerM, service processes WorkerN successively receive access chain
When meeting request content Stream, using the embodiment of the present invention data request method execute the step of it is as follows:
1, the service processes WorkerM on the node server S of CDN receives access linking request, request content Stream；
2, service processes WorkerM access scheduling system requests superior node dispatch server address；
3, scheduling system returns to superior node server address B and gives service processes WorkerM；
4, service processes WorkerM superior node server B request content Stream；
5, after the success of service processes WorkerM request content, content Stream information is registered to global content routing table,
The access interface of oneself is registered, and the access number of links load for initializing content Stream is 1；And respond request, distribution
Content Stream；
6, the service processes WorkerN above CDN server S receives another way and accesses linking request, request content
Stream；
7, service processes WorkerN inquires global content routing table, obtains the content Stream on service processes WorkerM
Access path；
8, service processes WorkerN is redirected to service processes WorkerM and carries out content Stream request；
9, service processes WorkerN obtains content Stream, and respond request from service processes WorkerM, carries out content
Distribution.
As it can be seen that data request method of the invention is applied to interior compared with the data request method of the prior art of Fig. 1
After node router in content distributing network CDN system, by optimization CDN node content routing, following beneficial effect is brought
Fruit:
(1) service processes WorkerN after optimizing to the request of content Stream need not request scheduling system again, do not have to again
Superior node cluster server is accessed, reduces the load of scheduling system, on the same stage the hyperlink request of the identical content of node server,
Superior node server cluster is only primary with processing, reduces the load of superior node server cluster, especially big concurrent
It (is exactly, such as in 1 second to occur largely requesting access to link while accessing this taking in synchronization or a certain very short time section
Business device) when, it can be substantially reduced the downlink traffic of superior node cluster, improve the stability and scheduling of CDN network group system
The stability of system improves performance.
(2) after optimizing for same node server S, same content Stream only can superior node cluster
Server is requested 1 time, and the additional request of identical content is avoided.
(3) other subsequent service processes are directed to the access request and data distribution of same content after optimizing, and take in node
Be engaged in device S locally complete, response quickly, avoid on the same stage server difference service processes difference is scheduled to the request of identical content
Superior node, avoid the formation of multirouting.
(4) optimize after can on present node server unexpectedly may multi-section affix one's name to service processes, it is whole so as to increase
The load capacity of a CDN system, and do not have to additional increase server hardware resource, server resource is maximally utilized as far as possible.
(5) the content requests routing of service processes WorkerN is changed after optimizing, and all access requests are in local section
It is completed on point server, promotes the response time, content requests routing is also completed in local node server, and raising responds successfully
Rate.
It,, only can superior under more service processes operational modes by the optimization of content routing table in the embodiment of the present invention
Node server request content is primary, and superior node server is avoided to send the repetition of the identical content of local node server,
The downlink traffic for saving superior node server, reduces its load；By safeguarding local server overall situation content routing table, pass through
Redirection process changes content routing, and retargetable to other service processes of local node server carries out content resource acquisition,
Especially when big concurrent, it is identical not have to superior node server re-request for the different service processes of node server on the same stage
Content avoids network oscillation, ensure that service quality to reduce link bandwidth consumption, and reduces CDN scheduling system
Load, while abnormality processing is considered, influence when by abnormal occurring reduces as far as possible；In addition, when there is multiple service processes to have
When having content, content is obtained from the least service processes of the access to content number of links every time, balance access to content is linked at
Load between each service processes, thus the problem for avoiding service processes single-point excessively high, thus improve the utilization rate of system with
And response success rate.
It is a kind of structural block diagram of request of data device in the embodiment of the present invention with reference to Fig. 6.The request of data device application
In node router in content distributing network CDN system, described device includes:
Linking request receiving module 301, for receiving linking request by this service processes；
First execution module 302, for judging that this service processes of local node server are asked with the presence or absence of the link
The information for the content asked records；If it exists, then the content is obtained；
Second execution module 303, for judging this service processes of local node server not in the first execution module 302
There are under the information record case of the content of the linking request, judge whether other service processes of local node server are deposited
In the information record of the content of the linking request, and if it exists, then obtain the content；
Third execution module 304, for judging other service processes of local node server in the second execution module 303
There is no under the information record case of the content of the linking request, the linking request is obtained in superior node server
Content；
Respond module 305, linking request described in the content response based on acquisition.
Wherein, local node server can be any node server in content distributing network CDN system, when local section
When point server is user's access node server, local node server can receive the linking request that user equipment is sent；When
When local node server is non-user access node server, local node server can receive the transmission of other node servers
Linking request.In the present embodiment, any node server in content distributing network CDN system is all made of more service processes
Operational mode, therefore, local node server can receive linking request by any service processes (for example, this service processes).
Specifically, first execution module 302 is sentenced by inquiring the independent content routing table of this service processes maintenance
Information record of this service processes of disconnected local node server with the presence or absence of the content of the linking request；Wherein, the list
Only content routing table records the information of each content of corresponding service processes.
Specifically, second execution module 303 is by inquiring the global content routing that all service processes are safeguarded jointly
Table judges other service processes of local node server with the presence or absence of the information record of the content of the linking request；Its
In, the linking request quantity of each content of each service processes of the overall situation content routing table record local node router
And access address.
And second execution module 303 is further used for: by inquiring in the overall situation that all service processes are safeguarded jointly
Hold other service processes that routing table records to judge local node server there are the information of the content of the linking request not
When less than one, then the service processes of the linking request minimum number of the content described in are selected, and passes through corresponding access
Location, which redirects, obtains the content.
The third execution module 304 is specifically used for:
Access scheduling system, the address of request superior node server；
The superior node server address that the scheduling system returns is received, and according to the superior node server address
To the content of linking request described in the superior node server request.
It in another embodiment, further include as shown in fig. 7, the request of data device of the present embodiment is on the basis of Fig. 6
One update module 306, the second update module 307 and third update module 308, in which:
First update module 306 is used to judge that this service processes of local node server are deposited in the first execution module 302
After information in the content of the linking request records and obtains the content, minute book in the global content routing table is taken
The linking request quantity of the content of business process adds 1, to update the global content routing table.
Second update module 307 is used to judge other service processes of local node server in the second execution module 303
After recording there are the information of the content of the linking request and obtain the content, the global content routing table is updated, it will be by
The linking request quantity for obtaining the content of the service processes of the content adds 1, while by the access address of this service processes
It is recorded in described and holds, and initializing linking request quantity is 1；And the independent content routing table of this service processes is updated,
Increase the information record of the content.
Third update module 308 is used to obtain the linking request in 304 superior node server of third execution module
Content after, update the independent content routing table of this service processes, increase the content information record；And it updates described complete
Office's content routing table increases this service processes to the linking request of the content, and initializing linking request quantity is 1, and incite somebody to action this
The access address of service processes is recorded in described and holds.
Preferably, on the basis of Fig. 6 or Fig. 7, the request of data device of the embodiment of the present invention further include:
Exception processing module, for passing through pipe when any service processes for detecting local node service occur abnormal
Reason process is updated to the global content routing table, to remove the linking request quantity of each content of exception service process
And access address.
The embodiment of the invention discloses a kind of node server, which includes that Fig. 6 or data shown in Fig. 7 are asked
Seek device.The node server of the present embodiment, only can superior node server request phase under more service processes operational modes
It is primary with content, it avoids superior node server from sending the repetition of the identical content of local node server, saves higher level's section
The downlink traffic of point server reduces its load, to reduce link bandwidth consumption, avoids network oscillation, ensure that Service Quality
Amount.
The embodiment of the invention discloses a kind of content distributing network CDN systems, including multiple node servers, in up and down
The node server of grade is communicated by scheduling system, and each described node server includes shown in Fig. 6 or Fig. 7
Request of data device.Since each node server in the content distributing network CDN system of the present embodiment uses such as Fig. 6
Or request of data device shown in Fig. 7, so that each node server under more service processes operational modes, only understands superior section
Point server requests identical content primary, and superior node server is avoided to send out the repetition of the identical content of local node server
It send, saves the downlink traffic of superior node server, to improve stability and the scheduling system of content distributing network CDN system
The stability of system, improves performance, and can on node server unexpectedly may multi-section affix one's name to service processes, to increase entire
The load capacity of CDN system, and do not have to additional increase server hardware resource, server resource is maximally utilized as far as possible.
In conclusion data request method disclosed by the invention, device, node server and CDN system pass through this service
When process receives linking request, first determine whether this service processes of local node server with the presence or absence of the interior of the linking request
The information of appearance records, and if it exists, then obtains the content directly in response to request；If it is not, then judging its of local node server
He records service processes with the presence or absence of the information of the content of the linking request, and if it exists, then obtains the content；Otherwise upwards
Grade node server obtains the content of the linking request.Therefore, data request method of the invention, device, node server
And CDN system, under more service processes operational modes, only meeting superior node server requests identical content primary, avoids
Grade node server sends the repetition of the identical content of local node server, saves the downstream of superior node server
Amount, reduces its load, to reduce link bandwidth consumption, avoids network oscillation, ensure that service quality.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (22)
1. a kind of data request method, which is characterized in that the method is applied to the node road in content distributing network CDN system
By in device, which comprises
Linking request is received by this service processes；
Judge that this service processes of local node server are recorded with the presence or absence of the information of the content of the linking request, if depositing
Then obtaining the content；Otherwise
Judge that other service processes of local node server are recorded with the presence or absence of the information of the content of the linking request, if depositing
Then obtaining the content；Otherwise
Superior node server obtains the content of the linking request；
Linking request described in the content response based on acquisition.
2. data request method as described in claim 1, which is characterized in that when judging local node server, there are the chains
Other service processes of information record of the content of request are connect when being no less than one, then the linking request of selection content described in
The service processes of minimum number obtain the content.
3. data request method as described in claim 1, which is characterized in that by inquiring the independent interior of this service processes maintenance
Hold routing table to judge that this service processes of local node server are recorded with the presence or absence of the information of the content of the linking request；
Wherein, the independent content routing table records the information of each content of corresponding service processes.
4. data request method as claimed in claim 3, which is characterized in that safeguarded jointly by all service processes of inquiry
Global content routing table judges other service processes of local node server with the presence or absence of the content of the linking request
Information record；Wherein, the global content routing table records each content of each service processes of local node router
Linking request quantity and access address.
5. data request method as claimed in claim 4, which is characterized in that safeguarded jointly by all service processes of inquiry
There are other services that the information of the content of the linking request records to judge local node server for global content routing table
When process is no less than one, then the service processes of the linking request minimum number of the content described in are selected, and by corresponding
Access address, which redirects, obtains the content.
6. data request method as claimed in claim 4, which is characterized in that judge local node server this service into
After journey records there are the information of the content of the linking request and obtains the content, further includes:
The linking request quantity of the content of minute book service processes in the global content routing table is added 1, to update
State global content routing table.
7. data request method as claimed in claim 4, which is characterized in that in other services for judging local node server
After process records there are the information of the content of the linking request and obtains the content, further includes:
The global content routing table is updated, the linking request quantity of the content of the service processes of the content will be acquired
Add 1, while the access address of this service processes being recorded in described and is held, and initializing linking request quantity is 1；
The independent content routing table for updating this service processes increases the information record of the content.
8. data request method as described in claim 1, which is characterized in that the superior node server obtains the chain
Connect the content of request specifically:
Access scheduling system, the address of request superior node server；
Receive the superior node server address that the scheduling system returns, and according to the superior node server address to institute
State the content of linking request described in superior node server request.
9. data request method as claimed in claim 4, which is characterized in that obtain the link in superior node server
After the content of request, further includes:
The independent content routing table for updating this service processes increases the information record of the content；
The global content routing table is updated, increases this service processes to the linking request of the content, initializes linking request
Quantity is 1, and the access address of this service processes is recorded in described and is held.
10. data request method as claimed in claim 4, which is characterized in that further include:
When any service processes of local node service occur abnormal, then pass through managing process to the global content routing table
It is updated, to remove the linking request quantity and access address of each content of exception service process.
11. a kind of request of data device, which is characterized in that described device is applied to the node in content distributing network CDN system
In router, described device includes:
Linking request receiving module, for receiving linking request by this service processes；
First execution module, for judging that this service processes of local node server whether there is the content of the linking request
Information record；If it exists, then the content is obtained；
Second execution module, for judging this service processes of local node server in the first execution module, there is no the chains
It connects under the information record case of the content of request, judges other service processes of local node server with the presence or absence of the link
The information of the content of request records, and if it exists, then obtains the content；
Third execution module, for judging other service processes of local node server in the second execution module, there is no described
Under the information record case of the content of linking request, the content of the linking request is obtained in superior node server；
Respond module, linking request described in the content response based on acquisition.
12. request of data device as claimed in claim 11, which is characterized in that second execution module is further used for:
When other service processes for judging that local node server is recorded there are the information of the content of the linking request are no less than one
When, then select the service processes of the linking request minimum number of the content described in obtain the content.
13. request of data device as claimed in claim 11, which is characterized in that first execution module is by inquiring this clothes
The independent content routing table of business process maintenance is asked to judge that this service processes of local node server whether there is the link
The information for the content asked records；Wherein, the independent content routing table records the information of each content of corresponding service processes.
14. request of data device as claimed in claim 13, which is characterized in that second execution module is all by inquiry
The global content routing table that service processes are safeguarded jointly judges other service processes of local node server with the presence or absence of institute
State the information record of the content of linking request；Wherein, each clothes of the global content routing table record local node router
The linking request quantity and access address of each content of business process.
15. request of data device as claimed in claim 14, which is characterized in that second execution module is further used for:
By inquiring the global content routing table that all service processes are safeguarded jointly, to judge local node server, there are the links
When other service processes of the information record of the content of request are no less than one, then the linking request number of the content described in is selected
Least service processes are measured, and is redirected by corresponding access address and obtains the content.
16. request of data device as claimed in claim 14, which is characterized in that further include the first update module, for the
One execution module judges that this service processes of local node server are recorded and obtained there are the information of the content of the linking request
After taking the content, the linking request quantity of the content of minute book service processes in the global content routing table is added 1,
To update the global content routing table.
17. request of data device as claimed in claim 14, which is characterized in that further include the second update module, for the
Two execution modules judge other service processes of local node server there are the information of the content of linking request records simultaneously
After obtaining the content,
The global content routing table is updated, the linking request quantity of the content of the service processes of the content will be acquired
Add 1, while the access address of this service processes being recorded in described and is held, and initializing linking request quantity is 1；And
The independent content routing table for updating this service processes increases the information record of the content.
18. request of data device as claimed in claim 11, which is characterized in that the third execution module is specifically used for:
Access scheduling system, the address of request superior node server；
Receive the superior node server address that the scheduling system returns, and according to the superior node server address to institute
State the content of linking request described in superior node server request.
19. request of data device as claimed in claim 14, which is characterized in that further include third update module, for the
After three execution module superior node servers obtain the content of the linking request,
The independent content routing table for updating this service processes increases the information record of the content；And
The global content routing table is updated, increases this service processes to the linking request of the content, initializes linking request
Quantity is 1, and the access address of this service processes is recorded in described and is held.
20. request of data device as claimed in claim 14, which is characterized in that further include:
Exception processing module, when any service processes for detecting local node service occur abnormal, by managing process to
The overall situation content routing table is updated, to remove the linking request quantity and access of each content of exception service process
Location.
21. a kind of node server, which is characterized in that including the described in any item request of data devices of such as claim 11-20.
22. a kind of content distributing network CDN system, which is characterized in that including multiple node serves as claimed in claim 21
Device, the node server in the superior and the subordinate are communicated by scheduling system.
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| CN110392020B (en) * | 2018-04-18 | 2021-05-07 | 网宿科技股份有限公司 | Streaming media resource transmission method and system |
| CN108337327A (en) * | 2018-04-26 | 2018-07-27 | 拉扎斯网络科技（上海）有限公司 | A kind of resource acquiring method and proxy server |
| CN109005118A (en) * | 2018-08-21 | 2018-12-14 | 中国平安人寿保险股份有限公司 | Search method, apparatus, computer equipment and the storage medium of CDN source station address |
| CN111385208B (en) * | 2018-12-29 | 2022-08-09 | 广州市百果园信息技术有限公司 | Routing method, routing device, computer equipment and storage medium |
| CN111756681A (en) * | 2019-03-29 | 2020-10-09 | 北京金山云网络技术有限公司 | Streaming media cascade scheduling method and device, electronic equipment and storage medium |
| CN112769900B (en) * | 2020-12-22 | 2023-04-25 | 中冶赛迪信息技术(重庆)有限公司 | Data distribution method, system, medium and electronic terminal |
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