CN101917326B - Distributed trans-coding system and task scheduling method thereof - Google Patents

Distributed trans-coding system and task scheduling method thereof Download PDF

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Publication number
CN101917326B
CN101917326B CN2009102375078A CN200910237507A CN101917326B CN 101917326 B CN101917326 B CN 101917326B CN 2009102375078 A CN2009102375078 A CN 2009102375078A CN 200910237507 A CN200910237507 A CN 200910237507A CN 101917326 B CN101917326 B CN 101917326B
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transcoding
server
task
information
scheduling
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CN101917326A (en
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李军
温晓瑶
闫鹏
王晶晶
魏国荣
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China Digital Video Beijing Ltd
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China Digital Video Beijing Ltd
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Abstract

The invention discloses a task scheduling method of a distributed trans-coding system comprising a plurality of trans-coding servers and user terminals, and a scheduling server arranged between the trans-coding servers and the user terminals. The method comprises the following steps of: registering information of each trans-coding server in the system in the scheduling server; feeding back the working state information of each trans-coding server to the scheduling server by each trans-coding server; and scheduling the corresponding trans-coding tasks to the corresponding trans-coding servers by the scheduling server in accordance with the working state information. The invention can ensure that the trans-coding tasks are more efficiently and more reasonably scheduled and system resources are saved.

Description

A kind of distributed trans-coding system and method for scheduling task thereof
Technical field
The present invention relates to the technical field of distributed treatment, particularly relate to a kind of method for scheduling task and device of distributed trans-coding system.
Background technology
Development along with the current media treatment technology; And, the rise of various new media modes such as Internet video, mobile video, traditional media is also gradually to the serviceization development at present; And pay attention to user's property of participation more; As on video website such as common excellent cruel, potato, the user can upload the video work of the various forms of own making, and other user just can form be online watches through unified FLV (Flash Video); In the traditional media industry; The news video data that the encouragement citizen obtain oneself is as the source of TV station's news clue; But present various front-end collection equipment adopts different forms; The file format that the camera acquisition of producing like different company goes out is different, and the different channel that broadcasts has different requirement to the file format code check.And along with the requirement to each high standard definition simulcast of TV station of the development of high definition and SARFT(The State Administration of Radio and Television) this year, except when the broadcast of preceding high definition program, the historical summary of SD program broadcasts requirement for adapting to high definition in the past, also need carry out corresponding code check conversion.Therefore, nowadays trans-coding system is widely used in various multimedia technology field and industry, like TV station, radio station, advertising company, video website etc.
In the application of network enabledization, video code conversion is realized based on distributed trans-coding system usually.This distributed trans-coding system generally includes a plurality of transcoding servers, when receiving the transcoding request of client (web terminal) submission, then through the control centre, handles to corresponding transcoding server the transcoding task scheduling.When scheduling, the control centre generally adopts the uniform distribution principle to intrasystem each transcoding server distribution transcoding task, for example; The center of calling successively receives three requests, the request of being respectively 1, request 2 and ask 3, and current have three transcoding server A, B, a C; For guaranteeing the load balancing of each station server, then will ask 1 fen to the A server, ask 2 fens to the B server; Ask 3 fens to the C server, rather than will ask 1, request 2 and ask 3 fens to a certain station server.
Yet in concrete the application, the fault of hardware, software aspect can appear in transcoding server inevitably, thereby possibly cause task to handle the situation of blocking; And as if being blocked by certain task of certain station server, task thereafter often also can't respond, thereby has a strong impact on transcoding efficiency.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method for scheduling task and device of distributed trans-coding system so that the transcoding task scheduling more efficiently, more reasonable, and save system resource.
In order to solve the problems of the technologies described above; The embodiment of the invention discloses a kind of method for scheduling task of distributed trans-coding system; Said distributed trans-coding system comprises a plurality of transcoding servers and user terminal; And, being connected the dispatch server between said transcoding server and the user terminal, described method comprises:
The information of each transcoding server in the Accreditation System in said dispatch server;
Each transcoding server feeds back its running state information in real time to said dispatch server, and the running state information of said transcoding server comprises the work at present state information and the resource occupation information of transcoding server;
Said dispatch server is handled corresponding transcoding task scheduling to corresponding transcoding server according to said running state information; Wherein, said transcoding task is the transcoding task requests generation of dispatch server according to each user terminal that receives; Said transcoding task has precedence information, and said dispatch server is dispatched processed steps and further comprised:
The transcoding task that priority level is the highest, it is free time and the minimum transcoding server of resource occupation that the work at present state is given in scheduling.
Preferably, the information of said transcoding server is the IP address information.
Preferably, said dispatch server is dispatched processed steps and is further comprised:
If the work at present state of all transcoding servers is busy in the current system, then suspend the debugging processing of said transcoding task.
The embodiment of the invention also discloses a kind of distributed trans-coding system; Said distributed trans-coding system comprises a plurality of transcoding servers and user terminal, and, be connected the dispatch server between said transcoding server and the user terminal; Dispatch server receives the transcoding task requests of each user terminal; Generate the transcoding task, wherein, said dispatch server comprises:
Registering modules is used for the information of each transcoding server in the Accreditation System;
Schedule process module is used for the running state information according to the real-time feedback of each transcoding server, and corresponding transcoding task scheduling to corresponding transcoding server is handled;
Said transcoding task has precedence information, and said schedule process module further comprises:
The priority scheduling submodule is used for the transcoding task that priority level is the highest, and it is free time and the minimum transcoding server of resource occupation that the work at present state is given in scheduling;
Said transcoding server comprises:
The active feedback module is used for feeding back its running state information in real time to said dispatch server, and the running state information of said transcoding server comprises the work at present state information and the resource occupation information of transcoding server.
Preferably, the information of said transcoding server is the IP address information.
Preferably, said schedule process module further comprises:
End the scheduling sublayer module, the work at present state that is used for all transcoding servers in current system is when having much to do, and suspends the debugging of said transcoding task and handles.
Compared with prior art, the present invention has the following advantages:
The present invention is through the information of each transcoding server in the Accreditation System in said dispatch server; Make dispatch server and each transcoding server can be on network mutual access; And each transcoding server can feed back its running state information initiatively, in real time to said dispatch server; When the transcoding task scheduling processing, the running state information that dispatch server only needs current each transcoding server of foundation to feed back is directly dispatched and is got final product; And do not need dispatch server at first initiatively to go to obtain the running status of each transcoding server, carry out once just can dispatch alternately earlier with transcoding server about running status.
And; The present invention is the transcoding task that priority is the highest directly; It is free time and the minimum transcoding server of resource occupation that the work at present state is given in scheduling, has not only guaranteed the timely processing of task, has also reduced the process that transcoding server is selected; Thereby make the transcoding task scheduling more efficiently, more reasonable, and effectively saved system resource.
Description of drawings
Fig. 1 is the flow chart of steps of the method for scheduling task embodiment of a kind of distributed trans-coding system of the present invention;
Fig. 2 is the structural representation of a kind of distributed trans-coding system of the present invention.
Embodiment
For make above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, below in conjunction with accompanying drawing and embodiment the present invention done further detailed explanation.
The present invention can be used in numerous general or special purpose computingasystem environment or the configuration.For example: multicomputer system, server, network PC, minicom, mainframe computer, comprise DCE of above any system or equipment or the like.
The present invention can describe in the general context of the computer executable instructions of being carried out by computer, for example program module.Usually, program module comprises the routine carrying out particular task or realize particular abstract, program, object, assembly, data structure or the like.Also can in DCE, put into practice the present invention, in these DCEs, by through communication network connected teleprocessing equipment execute the task.In DCE, program module can be arranged in this locality and the remote computer storage medium that comprises memory device.
One of core idea of the embodiment of the invention is; The information of each transcoding server in the Accreditation System in said dispatch server; Make dispatch server and each transcoding server can be on network mutual access; And each transcoding server can feed back its running state information initiatively, in real time to said dispatch server; When the transcoding task scheduling processing, dispatch server only needs directly dispatch according to the running state information of current each transcoding server feedback and gets final product, thus make the transcoding task scheduling more efficiently, more reasonable, and effectively saved system resource.
With reference to figure 1; Show the flow chart of steps of the method for scheduling task embodiment of a kind of distributed trans-coding system of the present invention; Wherein, said distributed trans-coding system can comprise a plurality of transcoding servers and user terminal, and; Be connected the dispatch server between said transcoding server and the user terminal, present embodiment specifically can may further comprise the steps:
Step 101, in said dispatch server the information of each transcoding server in the Accreditation System;
Step 102, each transcoding server feed back its running state information in real time to said dispatch server;
Step 103, said dispatch server are handled corresponding transcoding task scheduling to corresponding transcoding server according to said running state information.
Along with the continuous evolution of the Internet and cell phone network, the platform of broadcasting media is more and more, and the media formats of propagating the platform support accordingly is also more and more, and from mobile phone, to IPTV, high-definition digital broadcasting, different platform is different fully to the call format of content.In order to make the media data can be between the heterogeneous network, between different types of access device and transparent exchange between the different-format, the transcoding between the compressing video frequency flow becomes in the digital video the research direction of heat.The compressing video frequency flow transcoding. be exactly the compressing video frequency flow that a kind of compressing video frequency flow of Standards and formats is processed into the another kind of Standards and formats that more is adapted to certain application-specific.Video code conversion is handled the video code flow of compression end to end. and make the compressed bit stream behind the transcoding more can adapt to the requirement of transmission channel bandwidth and receiving terminal.
Because multi-media transcoding, especially video code conversion are processing procedures very consuming time, that expend computer resource, therefore, in reality, preferably, adopt Clustering to quicken this process, promptly adopt distributed trans-coding system.Use the present invention under dispatching management efficiently, let a plurality of transcoding tasks parallel carrying out in cluster, thereby greatly improve the throughput of transcoding.
For making those skilled in the art understand the present invention better, the roughly course of work of distributed trans-coding system described in following brief account the present invention.
Generally speaking; Dispatch server can carry out alternately with each user terminal (web terminal) and transcoding server, the transcoding task requests that the reception sources user terminal is submitted to and within it portion rank, then with the transcoding task in the formation; Dispatch to current optimal transcoding server based on requirement efficient, that rationalize; After transcoding server was carried out concrete video code conversion processing, the result was back to dispatch server with transcoding, is distributed to corresponding target terminal user by dispatch server again.
For make dispatch server and each transcoding server can be on network mutual access, in concrete the realization, the information of each transcoding server in the system that in dispatch server, registers can be the IP address and the equipment identification information of each transcoding server.Be that each transcoding server all can configuring fixed IP addresses and implementor name in the system, with said IP address, perhaps, IP address and implementor name are registered in the dispatch server, just can realize the communication interconnect of dispatch server and each transcoding server.
High efficiency and rationalization for the transcoding task scheduling; The inventor herein considers to realize from fast reaction two aspects of actual conditions that combine transcoding server and dispatch server, the actual conditions of transcoding server; Specifically can embody through the work at present state information and the resource occupation information of transcoding server, for example, current whether busy still idle; And internal memory, the CPU of transcoding server itself take situation.In the embodiment of the invention, these information by transcoding server initiatively, report to dispatch server in real time.In this case; Dispatch server just need be before each task of scheduling; Initiate once mutual about its running status with transcoding server again, only need promptly read the information of its storage inside according to the running state information of transcoding server active feedback; Corresponding distribution transcoding task is just passable, thereby makes dispatch server reach the rapid-action purpose for the scheduling of each task.
Dispatch better for combining user's actual need; The present invention is directed to further configuration preference class information of the transcoding task of lining up in the dispatch server; When dispatch server during in scheduler task; Can check the performance state of all idle transcoding servers earlier, the server to performance state best (resource occupation is minimum) is dispatched in then that priority level is the highest priority of task.If all transcoding servers all are in busy condition, then temporarily do not dispatch the transcoding task, there is idle transcoding server to dispatch again by the time.It is thus clear that; Use the embodiment of the invention; If certain server runs into hardware or software failure, cause task to be blocked, dispatch server can not continue to its distributed tasks yet; Handle and can other task be transferred to other transcoding server of handling of having ready conditions, thereby further improved the treatment effeciency of system.
Need to prove; For aforesaid method embodiment, for simple description, so it all is expressed as a series of combination of actions; But those skilled in the art should know; The present invention does not receive the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in the specification all belongs to preferred embodiment, and related action and module might not be that the present invention is necessary.
With reference to figure 2; Show the structural representation of a kind of distributed trans-coding system of the present invention; Said distributed trans-coding system can comprise a plurality of transcoding servers 21 and user terminal 23, and, be connected the dispatch server 22 between said transcoding server 21 and the user terminal 23; Wherein, said dispatch server 22 can comprise with lower module:
Registering modules is used for the information of each transcoding server in the Accreditation System;
Schedule process module is used for the running state information according to the real-time feedback of each transcoding server, and corresponding transcoding task scheduling to corresponding transcoding server is handled;
Said transcoding server 21 can comprise with lower module:
The active feedback module is used for feeding back its running state information in real time to said dispatch server.
The roughly course of work of said distributed trans-coding system does; Dispatch server 22 can carry out alternately with each user terminal 23 and transcoding server 21; The transcoding task requests that the reception sources user terminal is submitted to and within it portion rank; With the transcoding task in the formation, dispatch to current optimal transcoding server 21 then, after transcoding server 21 is carried out concrete video code conversion processing based on requirement efficient, that rationalize; The transcoding result is back to dispatch server 22, is distributed to corresponding target terminal user 23 by dispatch server 22 again.
In concrete the realization, the information of said transcoding server can be the IP address information; The running state information of said transcoding server comprises the work at present state information and the resource occupation information of transcoding server.
In a kind of preferred embodiment of the present invention, said transcoding task has precedence information, and said schedule process module may further include following submodule:
The priority scheduling submodule is used for the transcoding task that priority level is the highest, and it is free time and the minimum transcoding server of resource occupation that the work at present state is given in scheduling.
In reality, said schedule process module can also comprise following submodule:
End the scheduling sublayer module, the work at present state that is used for all transcoding servers in current system is when having much to do, and suspends the debugging of said transcoding task and handles.
Because present embodiment is basically corresponding to preceding method embodiment, so not detailed part in the description of present embodiment can just not given unnecessary details at this referring to the related description in the previous embodiment.What each embodiment in this specification stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
More than the method for scheduling task of a kind of distributed trans-coding system provided by the present invention and a kind of task scheduling apparatus of distributed trans-coding system have been carried out detailed introduction; Used concrete example among this paper principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.

Claims (6)

1. the method for scheduling task of a distributed trans-coding system; It is characterized in that said distributed trans-coding system comprises a plurality of transcoding servers and user terminal, and; Be connected the dispatch server between said transcoding server and the user terminal, described method comprises:
The information of each transcoding server in the Accreditation System in said dispatch server;
Each transcoding server feeds back its running state information in real time to said dispatch server, and said running state information comprises the work at present state information and the resource occupation information of transcoding server;
Said dispatch server is handled corresponding transcoding task scheduling to corresponding transcoding server according to said running state information;
Wherein, said transcoding task is the transcoding task requests generation of dispatch server according to each user terminal that receives; Said transcoding task has precedence information, and said dispatch server is dispatched processed steps and further comprised:
The transcoding task that priority level is the highest, it is free time and the minimum transcoding server of resource occupation that the work at present state is given in scheduling.
2. the method for claim 1 is characterized in that, the information of said transcoding server is the IP address information.
3. the method for claim 1 is characterized in that, said dispatch server is dispatched processed steps and further comprised:
If the work at present state of all transcoding servers is busy in the current system, then suspend the debugging processing of said transcoding task.
4. a distributed trans-coding system is characterized in that, said distributed trans-coding system comprises a plurality of transcoding servers and user terminal; And; Be connected the dispatch server between said transcoding server and the user terminal, dispatch server receives the transcoding task requests of each user terminal, generates the transcoding task; Wherein, said dispatch server comprises:
Registering modules is used for the information of each transcoding server in the Accreditation System;
Schedule process module is used for the running state information according to the real-time feedback of each transcoding server, and corresponding transcoding task scheduling to corresponding transcoding server is handled;
Said transcoding task has precedence information, and said schedule process module further comprises:
The priority scheduling submodule is used for the transcoding task that priority level is the highest, and it is free time and the minimum transcoding server of resource occupation that the work at present state is given in scheduling;
Said transcoding server comprises:
The active feedback module is used for feeding back its running state information in real time to said dispatch server, and the running state information of said transcoding server comprises the work at present state information and the resource occupation information of transcoding server.
5. system as claimed in claim 4 is characterized in that, the information of said transcoding server is the IP address information.
6. system as claimed in claim 4 is characterized in that, said schedule process module further comprises:
End the scheduling sublayer module, the work at present state that is used for all transcoding servers in current system is when having much to do, and suspends the debugging of said transcoding task and handles.
CN2009102375078A 2009-11-17 2009-11-17 Distributed trans-coding system and task scheduling method thereof Expired - Fee Related CN101917326B (en)

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