CN108833554A - A kind of real-time highly reliable message distributing system and its method towards large scale network - Google Patents
A kind of real-time highly reliable message distributing system and its method towards large scale network Download PDFInfo
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- CN108833554A CN108833554A CN201810649775.XA CN201810649775A CN108833554A CN 108833554 A CN108833554 A CN 108833554A CN 201810649775 A CN201810649775 A CN 201810649775A CN 108833554 A CN108833554 A CN 108833554A
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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
- H04L67/08—Protocols specially adapted for terminal emulation, e.g. Telnet
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
- H04L51/06—Message adaptation to terminal or network requirements
- H04L51/066—Format adaptation, e.g. format conversion or compression
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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
- H04L67/104—Peer-to-peer [P2P] networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/565—Conversion or adaptation of application format or content
Abstract
A kind of real-time highly reliable message distributing system and its method towards large scale network belongs to field of network transmission；Device includes multimedia platform connection central server, one central server connects several transfer servers, one transfer server connects several terminal users, several terminal users are divided into several groups, and the terminal user between each group is connected with each other；Method includes that central server broadcasts a control information, determines current online terminal user and its state；When central server dispatch messages, the file information is transmitted by RabbitMQ, after terminal user receives information, returns to a feedback information, establishes corresponding message transmission queue；When transmission message is excessive, the distribution of multimedia file is carried out with P2P；After terminal user receives complete seed file, terminal user opens local P2P downloading process；The problem of effective solution of the present invention network data cannot be considered in terms of real-time and reliability in distribution procedure.
Description
Technical field
The invention belongs to field of network transmission more particularly to a kind of real-time highly reliable message distributions towards large scale network
System and method.
Background technique
Nowadays, the internet of high speed development has become a part indispensable in life, how to realize extensive, real
When and the transmission of highly reliable data be always study Internet popular direction.At the beginning of internet occurs, all due to data volume
Smaller, large-scale data distribution will not generate too big time and resource consumption.But with the continuous development of Streaming Media
Distribution with being continuously increased for the network user, Blu-ray video, software upgrading and Online Video stream etc. has increasing need for more nets
Exponential increase is presented in network resource, service and application based on content.It is estimated that video flow will account for all consumer's Internet streamings
The 82% of amount.And Web content distribution needs to provide lower delay, quick transmission speed and reliability of service, so solution
Certainly the real-time and reliability of network data distribution are a problem to be solved.
Summary of the invention
The present invention overcomes above-mentioned the deficiencies in the prior art, provide a kind of real-time highly reliable message towards large scale network
Dissemination system and its method.
Technical solution of the present invention：
A kind of real-time highly reliable message distributing system towards large scale network, including multi-medium data, central server,
Transfer server and terminal user；The multi-medium data is that the producer of multimedia resource is for producing multimedia resource
Numerous multimedia platforms；The central server is distributed for resources control, stores all multimedia resources；The transfer clothes
Business device is erected at each different area, distributes resource to this area user for being stored with Resource Replica；The terminal user
It is the requestor and user of multimedia resource；The multimedia platform connects central server, one central server
Several transfer servers are connected, one transfer server connects several terminal users, several described terminal users
It is divided into several groups, the terminal user between each group is connected with each other.
Further, control command is transmitted by AMQP between the central server and transfer server, used
RabbitMQ realizes the message channel of a control information, logical by the message between the transfer server and terminal user
Road transmitting and scheduling order.
A kind of real-time highly reliable message distributing system based on described towards large scale network realize towards extensive net
The method of the real-time highly reliable message distribution of network, includes the following steps：
Step a, central server broadcasts a control to terminal user by transfer server by control RabbitMQ
Information determines current online terminal user and its state；
Step b, when central server is needed to terminal user's dispatch messages, central server, which passes through RabbitMQ, to be transmitted
The information of the following file to be sent makes each terminal user receive central server by each transfer server
After holding the information sent, a reception feedback information is returned, according to the information transmitted, corresponding message is established and passes
Defeated queue；
Step c, central server can send the foundation of a confirmation message confirmation current message queue before message transmission
Situation broadcasts corresponding message to the channel after meet demand；
Step d, when the message of required transmission is excessive, system will use the distribution that P2P carries out multimedia file, can be first
The length information of a seed is sent to each terminal user for needing to receive the message, terminal user's feedback reception situation；
Step e, the message text distributed required for after central server end is transmitted by transfer server to terminal user
The seed file of part after terminal user receives complete seed file, sends one to central server by transfer server
Feedback, terminal user open local P2P downloading process, download seed file by the information in the seed file.
Further, after each terminal user receives the information that central server end is sent in step b, terminal is used
Family can read the information, and whether the file to be distributed described in judgement is transmitted across, if being transmitted across, without place
Reason；If not sent mistake, according to the size of file, file is distributed using corresponding distribution is affected.
Further, when the file of required transmission is small, small documents are distributed using RabbitMQ, method is such as
Under：
During file distributing, transfer server reads the node that present multimedia file needs to issue, will be under needs
The file information of fat file is by the channel transfer to the current online received node of needs；When terminal user receives biography
After the document base information sent, the nodal information of oneself and the file configuration information received are verified transfer service
Device feeds back central server, while establishing corresponding file reception queue；Central server is collected complete by the channel
At the information of the user node of Path Setup, to the node distribution of document content for establishing completion receiving channel；It is different in terminal user
Step receives the file, and returns to one after finishing receiving and be properly received feedback.
Further, when being distributed using RabbitMQ to small documents, it is divided into two kinds of ways of distribution, is directly to divide respectively
Hair mode and subscription/broadcast distribution mode；If only needing to transmit file to part of nodes, direct distribution mode is preferentially used,
Respectively to these node distributions of document；If necessary to preferentially use subscription/broadcast mode to whole node distributions of document.
Further, it is distributed when message is excessive using P2P described in step d, distribution method is as follows：
Step d1, central server reads catalogue, and scanning needs the file distributed, and generates the seed file of file；
Step d2, the seed file information of file is issued to the node for needing to receive this document by central server；
Step d3, after central server receives the feedback that the foundation of receiving node receiving channel is completed, channel transfer is used
Seed file；
Step d4, the file information is issued to transfer server by channel by central server；When transfer server is established
After receiving channel, central server is issued the documents to transfer server；
Step d5, central server receives the feedback that transfer server finishes receiving, and connects to all terminal users distribution
The file information of file, node are opened BitTorrent and are downloaded after receiving the file information, the seed information of resolution file,
It requests to download to transfer server；
Step d6, terminal node transmits and receives to server end after finishing receiving file and completes feedback；
If step d7, most of node receives to complete configuration, return step d1；Otherwise wait for terminal node reception.
The present invention has the advantages that compared with the existing technology：
The invention discloses a kind of real-time highly reliable message distributing system and its method towards large scale network, by adopting
With the method for blending AMQP technology and P2P technology, the file of different scales is distributed into different transmission modes and is distributed, is mentioned
The rate for rising distribution, realizes the real-time and high reliability of distribution, the more preferable network data that must solve can not be simultaneous in distribution procedure
The problem of caring for real-time and reliability, promotes the framework of the rate of data distribution.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is flow chart of the present invention；
Fig. 3 is small documents distribution flow figure；
Fig. 4 is big file distributing flow chart；
Fig. 5 is the 100MB resource dissemination rate diagram under different number node；
Fig. 6 is the 1000MB resource dissemination rate diagram under different number node；
Fig. 7 is that single machine simulates 60 nodes distribution different scales source rates figure.
Specific embodiment
Below with reference to attached drawing, the present invention is described in detail.
Specific embodiment one
Present embodiment discloses a kind of real-time highly reliable message distributing system towards large scale network, as shown in Figure 1, packet
Include multi-medium data, central server, transfer server and terminal user；The multi-medium data is the production of multimedia resource
Person is numerous multimedia platforms for producing multimedia resource；The central server is distributed for resources control, stores institute
Some multimedia resources；The transfer server is erected at each different area, to this area for being stored with Resource Replica
User distributes resource；The terminal user is the requestor and user of multimedia resource；Multimedia platform connection center
Server, one central server connect several transfer servers, and one transfer server connects several ends
End subscriber, several described terminal users are divided into several groups, and the terminal user between each group is connected with each other.
Specific embodiment two
Specifically, control command is transmitted by AMQP between the central server and transfer server, uses RabbitMQ
The message channel for realizing a control information is adjusted between the transfer server and terminal user by message channel transmission
Drag out a miserable existence order, whole system of the invention can be made to obtain preferably distribution speed by RabbitMQ, allow central server and in
Higher efficiency can be played by turning server.
AMQP (Advanced Message Queuing Protocol) full name is advanced message queue protocol, is one
It is erected on applications of computer network layer, the level message transmission queue protocol of unified message service is provided.Set up transfer clothes
Business device, when system is run, transmitting terminal is by message dilivery to transfer server, since transmitting terminal delivers the difference of keyword, transfer
Server distributes the messages to different message sink ends according to these different keywords, realizes the different of transmitting terminal and receiving end
Step interconnection.Meanwhile the maintenance of message and the load balancing of total system are responsible in transfer server end.Different programmings can be passed through
Language is write, and can run in different programming languages.RabbitMQ is that one based on AMQP standard implementation typically opens
Source message-oriented middleware；AMQP is erected on applications of computer network layer, from proper a set of transport protocol.And its typical case realizes
RabbitMQ server is write by Erlang language, the open source program for cluster message distribution.
RabbitMQ possesses several different message distribution transmission modes, is message Straight transmission model, broadcast/subscription mould respectively
Formula and reception keyword mode.The message of production is pushed to message queue by the Straight transmission model producer, all concern queues
Consumer can receive the message, and the message disappears after reception.In broadcast/subscribing mode, the producer after generating message,
Among the message dilivery to all receiving queues for subscribing to the message, received for consumer.It is raw in receiving keyword mode
Among the queue that production person only meets the message dilivery of production to monitoring keyword.
Specific embodiment three
A kind of real-time highly reliable message distributing system based on described towards large scale network realize towards extensive net
The method of the real-time highly reliable message distribution of network, as shown in Fig. 2, including the following steps：
Step a, central server broadcasts a control to terminal user by transfer server by control RabbitMQ
Information determines current online terminal user and its state；
Step b, when central server is needed to terminal user's dispatch messages, central server, which passes through RabbitMQ, to be transmitted
The information of the following file to be sent makes each terminal user receive central server by each transfer server
After holding the information sent, a reception feedback information is returned, according to the information transmitted, corresponding message is established and passes
Defeated queue；
Step c, central server can send the foundation of a confirmation message confirmation current message queue before message transmission
Situation broadcasts corresponding message to the channel after meet demand；
Step d, when the message of required transmission is excessive, system will use the distribution that P2P carries out multimedia file, can be first
The length information of a seed is sent to each terminal user for needing to receive the message, terminal user's feedback reception situation；
Step e, the message text distributed required for after central server end is transmitted by transfer server to terminal user
The seed file of part after terminal user receives complete seed file, sends one to central server by transfer server
Feedback, terminal user open local P2P downloading process, download seed file by the information in the seed file.
P2P (peer-to-peer) network, also known as peer to peer network are a kind of without central server, by numerous
User node, a huge internet of composition.Its effect is, relies on numerous user nodes, and interconnect biography
Defeated resource reduces the problem of Single Point of Faliure is brought with excessive, the load too high that reduces localized network flow.In P2P network, often
A node is user node, and is service node, meets the thinking of network share.Specifically, P2P network is divided into structuring
P2P network, non-structured P2P network and loose structure P2P network.The P2P network of structuring is mutual among the nodes
Connection, constituting has the topological structure of certain rule for use when resource searching, and Typical Representative has Chord, Kademlia etc..Nothing
It is connected with each other between the P2P network node of structure, but does not form structured network topology, it is current by broadcast shape between node
Formula is completed, and Typical Representative has Gnutella.The P2P network of loose structure is between structured P2P network and structureless P2P
Between network, it will usually which, with the presence of central server, Typical Representative has Freenet.
The P2P network efficiency highest of structuring, wherein using Kademlia network structure as representative.Realize this network structure
Exemplary program have BitTorrent.BitTorrent is a open source program write by python language, BitTorrent
Agreement is a transport communication protocol of the framework on TCP/IP layer, is an application layer protocol.It is assisted in BitTorrent
In view, resource can be requested by two ways, one is DHT (Distributed Hash Table) nets by structuring
Network, another is to request resource by seed file.The present invention's is improved BitTorrent network to distribute
Resource.
Specific embodiment four
Specifically, after each terminal user receives the information that central server end is sent in step b, terminal user
It can read the information, whether the file to be distributed described in judgement is transmitted across, if being transmitted across, without processing；
If not sent mistake, according to the size of file, file is distributed using corresponding distribution is affected.
Specific embodiment five
Specifically, as shown in figure 3, when the file of required transmission is small, if being distributed using P2P network can increase
Resource consumption in network, and distribute low efficiency, so being distributed using RabbitMQ to small documents, distribution method is such as
Under：
During file distributing, transfer server reads the node that present multimedia file needs to issue, will be under needs
The file information of fat file is by the channel transfer to the current online received node of needs；When terminal user receives biography
After the document base information sent, the nodal information of oneself and the file configuration information received are verified transfer service
Device feeds back central server, while establishing corresponding file reception queue；Central server is collected complete by the channel
At the information of the user node of Path Setup, to the node distribution of document content for establishing completion receiving channel；It is different in terminal user
Step receives the file, and returns to one after finishing receiving and be properly received feedback.
Specific embodiment six
Specifically, when being distributed using RabbitMQ to small documents, it is divided into two kinds of ways of distribution, is directly to distribute respectively
Mode and subscription/broadcast distribution mode；If only needing to transmit file to part of nodes, direct distribution mode is preferentially used, point
Not to these node distributions of document；If necessary to preferentially use subscription/broadcast mode to whole node distributions of document.
If only needing to transmit file to part of nodes, direct distribution mode is preferentially used, is distributed respectively to these nodes
File can reduce broadcast control information bring flow in this way, but will increase certain biography during delivering distribution
Defeated workload.If necessary to then preferentially using subscription/broadcast mode, in this case, broadcast to whole node distributions of document
It is reduced to control influence of the information to whole network, while subscribing to/broadcast mode using less duplicate of the document, reduce file
The workload of disk operating.
Specific embodiment seven
In content distributing network, for biggish file, if using one-to-many transmission mode, so that single node
Network bandwidth become the performance bottleneck of whole system, and one-to-many transmission mode, then will appear the network of sending node
Congestion causes to distribute efficiency reduction.And P2P transmission network perfectly solves the problems, such as this, P2P network B itTorrent, makes
It is the transmission mode of multi-to-multi, each node has also connect in distribution while the file fragmentation that request does not receive
The file fragmentation received.Although the receiving velocity of some single node in this way reduces, the receiving time of whole system drops
It is low.Therefore, quickening distribution efficiency is distributed using P2P network, hence it is evident that reduce the global distribution time.So the present invention adopts
Big file is distributed with modified BitTorrent network.
Specifically, as shown in figure 4, being distributed described in step d when message is excessive using P2P, distribution method is such as
Under：
Step d1, central server reads catalogue, and scanning needs the file distributed, and generates the seed file of file；
Step d2, the seed file information of file is issued to the node for needing to receive this document by central server；
Step d3, after central server receives the feedback that the foundation of receiving node receiving channel is completed, channel transfer is used
Seed file；
Step d4, the file information is issued to transfer server by channel by central server；When transfer server is established
After receiving channel, central server is issued the documents to transfer server；
Step d5, central server receives the feedback that transfer server finishes receiving, and connects to all terminal users distribution
The file information of file, node are opened BitTorrent and are downloaded after receiving the file information, the seed information of resolution file,
It requests to download to transfer server；
Step d6, terminal node transmits and receives to server end after finishing receiving file and completes feedback；
If step d7, most of node receives to complete configuration, return step d1；Otherwise wait for terminal node reception.
It why can be because of its structuring with higher transmission speed shared file in BitTorrent network
Network topology and file fragmentation shared mechanism.When requesting to generate, client is by way of iteration to entire DHT
The owner of (Distribute Hash Table) the network inquiry content file, and this document is requested to the part owner.?
In the transmission process of file, the transmission strategy of BitTorrent network is preferentially to transmit different file point to different requestors
Piece preferentially distributes rare fragment.In this way, can earlier start requestor between mutual biography, make whole system content text
Part is integrally distributed efficiency and is optimal as early as possible.
Specific embodiment seven
In conjunction with above embodiment, experimental selection main criterion of the average speed of download as test result, this
One parameter can embody the distribution performance of system entirety, by fluctuate influenced it is smaller.The Mean Speed of test data is file
The ratio for the time that size and file are received since distribution to all nodes, rather than single node receives file.Institute
There is experiment all to complete between several servers, the configuration information of platform used in experimentation is as shown in table 1.
1 experiment porch configuration information of table
As shown in figure 5, being transmitted using RabbitMQ or using distribution of the BitTorrent network under different number of nodes
Rate diagram.As can be seen, when distributing file (100MB) of small-scale, when interstitial content is smaller, RabbitMQ is passed
Defeated to occupy absolute advantage, when requesting node number increases, RabbitMQ transmission is also an advantage over BitTorrent transmission, only
It is that advantage is smaller and smaller.In the case where number of nodes is continuously increased, due to machine performance and network, transmission rate has
Declined.Thus illustrate the small documents transmission that RabbitMQ is suitble under certain scale, efficiency of transmission with higher.
As shown in fig. 6, when the size for transmitting file is promoted by 100MB to 1000MB, in 10 node, since system provides
Source utilization rate does not reach maximum, and RabbitMQ transmission rate is still higher than BitTorrent transmission；But when interstitial content is continuous
When increase, in the case where system resource load balancing, the fragment of BitTorrent network mutually passes mechanism and embodies its advantage,
The transmission of BitTorrent network is higher than RabbitMQ network.Thus illustrate that BitTorrent is more suitable for the transmission of big file,
Efficiency of transmission is high in the case that node is numerous.
As shown in fig. 7, the rate of different size file is transmitted with this system for RabbitMQ transmission, BitTorrent transmission
Figure, the time of the calculating of test data start to terminate from file distributing to file distributing.The entire text it can be seen from line chart
During part is distributed, since the present invention has carried out simplified partial and modification to RabbitMQ transmission and BitTorrent transmission,
And some transmission controls are increased on this basis, so have preferable transmission rate to full scale segment file.In transmission text
Part hour, the control information transmission before transmission accounts for higher ratio during overall transfer, so only having 1MB big in file
Hour, transmission rate is relatively low.When transmission file is big, ratio shared by control message is reduced, and transmission speed fluctuation is based on steady.
The present invention has given full play to joint behavior, reduces the load of server, improves the efficiency of entire transmission process.
Claims (7)
1. a kind of real-time highly reliable message distributing system towards large scale network, which is characterized in that including multi-medium data, in
Entreat server, transfer server and terminal user；The multi-medium data is the producer of multimedia resource, for producing more matchmakers
Body resource is numerous multimedia platforms；The central server is distributed for resources control, stores all multimedia resources；
The transfer server is erected at each different area, distributes resource to this area user for being stored with Resource Replica；Institute
State the requestor and user that terminal user is multimedia resource；The multimedia platform connects central server, one
Central server connects several transfer servers, and one transfer server connects several terminal users, described several
A terminal user is divided into several groups, and the terminal user between each group is connected with each other.
2. the real-time highly reliable message distributing system towards large scale network according to claim 1, which is characterized in that described
Control command is transmitted by AMQP between central server and transfer server, realizes disappearing for a control information with RabbitMQ
Channel is ceased, passes through the message channel transmitting and scheduling order between the transfer server and terminal user.
3. a kind of face that the real-time highly reliable message distributing system based on as claimed in claim 1 or 2 towards large scale network is realized
To the method for the real-time highly reliable message distribution of large scale network, which is characterized in that include the following steps：
Step a, central server broadcasts a control information to terminal user by transfer server by control RabbitMQ,
Determine current online terminal user and its state；
Step b, when central server is needed to terminal user's dispatch messages, central server is connect down by RabbitMQ transmission
The information for carrying out the file to be sent makes each terminal user receive central server end hair by each transfer server
After the information sent, a reception feedback information is returned, according to the information transmitted, establishes corresponding message transmission team
Column；
Step c, for central server before message transmission, can send a confirmation message confirmation current message queue establishes feelings
Condition broadcasts corresponding message to the channel after meet demand；
Step d, when the message of required transmission is excessive, system will use the distribution that P2P carries out multimedia file, can first send
The length information of one seed gives each terminal user for needing to receive the message, terminal user's feedback reception situation；
Step e, the message file distributed required for after central server end is transmitted by transfer server to terminal user
Seed file after terminal user receives complete seed file, sends a feedback to central server by transfer server,
Terminal user opens local P2P downloading process, downloads seed file by the information in the seed file.
4. the method for the real-time highly reliable message distribution towards large scale network according to claim 3, which is characterized in that step
After each terminal user receives the information that central server end is sent in rapid b, terminal user can read the message letter
It ceases, whether the file to be distributed described in judgement is transmitted across, if being transmitted across, without processing；If not sent mistake, basis
The size of file is distributed file using corresponding distribution is affected.
5. the method for the real-time highly reliable message distribution towards large scale network according to claim 4, which is characterized in that when
The file hour of required transmission is distributed small documents using RabbitMQ, and distribution method is as follows：
During file distributing, transfer server reads the node that present multimedia file needs to issue, and will need lower dispatch
The file information of part is by the channel transfer to the current online received node of needs；When terminal user receive transmission and
After the document base information come, it is anti-that the nodal information of oneself and the file configuration information received are verified transfer server
Central server is presented, while establishing corresponding file reception queue；Central server has been completed to lead to by the channel, collection
The information for the user node that road is established, to the node distribution of document content for establishing completion receiving channel；It connects terminal user is asynchronous
The file is received, and returns to one after finishing receiving and is properly received feedback.
6. the method for the real-time highly reliable message distribution towards large scale network according to claim 5, which is characterized in that make
When being distributed with RabbitMQ to small documents, it is divided into two kinds of ways of distribution, is direct distribution mode and subscription/broadcast point respectively
Hair mode；If only needing to transmit file to part of nodes, direct distribution mode is preferentially used, distributes text to these nodes respectively
Part；If necessary to preferentially use subscription/broadcast mode to whole node distributions of document.
7. the method for the real-time highly reliable message distribution towards large scale network according to claim 3, which is characterized in that step
Described in rapid d when message is excessive, it is distributed using P2P, distribution method is as follows：
Step d1, central server reads catalogue, and scanning needs the file distributed, and generates the seed file of file；
Step d2, the seed file information of file is issued to the node for needing to receive this document by central server；
Step d3, after central server receives the feedback that the foundation of receiving node receiving channel is completed, channel transfer seed is used
File；
Step d4, the file information is issued to transfer server by channel by central server；It establishes and receives when transfer server
Behind channel, central server is issued the documents to transfer server；
Step d5, central server receives the feedback that transfer server finishes receiving, and connects file to all terminal users distribution
The file information, node after receiving the file information, open BitTorrent downloading, the seed information of resolution file, Xiang Zhong
Turn server request downloading；
Step d6, terminal node transmits and receives to server end after finishing receiving file and completes feedback；
If step d7, most of node receives to complete configuration, return step d1；Otherwise wait for terminal node reception.
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| CN111131515A (en) * | 2019-12-31 | 2020-05-08 | 武汉市烽视威科技有限公司 | CDN edge injection distribution method and system |
| CN114448962A (en) * | 2022-01-17 | 2022-05-06 | 南昌华勤电子科技有限公司 | Web application instant message notification system, method and server |
| CN115314512A (en) * | 2022-10-09 | 2022-11-08 | 中孚信息股份有限公司 | Massive terminal data synchronization method and system |
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