CN105306532A - System and method for improving data downloading reliability and speed in meteorological model system - Google Patents
System and method for improving data downloading reliability and speed in meteorological model system Download PDFInfo
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L67/00—Network arrangements or protocols for supporting network services or applications
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- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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Abstract
The invention relates to a meteorological model. Specific to the problems of low data downloading speed and poor reliability in a meteorological model system in the prior art, the invention provides a system for improving the meteorological data downloading reliability and speed in the meteorological model system. The system comprises a meteorological data downloading main server and at least one slave server, wherein the meteorological data downloading main server is used for receiving a downloading task, and decomposing the downloading task into a plurality of parts which are transmitted to the slave server(s) and the meteorological data downloading main server respectively; a task part number is a sum of the number of the slave server(s) and the number of the meteorological data downloading main server; the meteorological data downloading main server is used for downloading data according to a received downloading task, and integrating the downloaded data with data transmitted by the slave server(s); and the slave server(s) is/are used for downloading data according to the received downloading task, and transmitting the downloaded data to the meteorological data downloading main server. The system is suitable for meteorological data downloading.
Description
Technical field
The present invention relates to meteorologic model, particularly in meteorologic model system, meteorological data is downloaded.
Background technology
In the business such as current weather forecast and Air Quality Forecast forecast, generally have employed the meteorologic models such as WRF, MM5, the operation of these meteorologic models all needs to input the meteorological data matched with simulated time, as initial condition and the boundary condition of model.In the weather forecast, Air Quality Forecast forecast system of businessization operation, before model running, need to download up-to-date meteorological data, this type systematic is generally unattended operation, automatically runs, and meteorological data is also downloaded automatically by program control.
With current Mesoscale numerical model WRF the most frequently used in weather forecast and Air Quality Forecast forecasts services, for example, as shown in Figure 1, before each model running, all need the meteorological field data of download grid, the most frequently used is the GFS meteorological data that Environmental forecasting centre (NCEP) provides.This type systematic General Requirements automatic operating, the automatic download of NCEPGFS meteorological data is the first step of system cloud gray model.Meteorological data normal, quick-downloading is the key factor that can system normally be run.
The meteorological data of current meteorologic model system (foregoing WRF model) is downloaded, modal is in a linux download server, call download tool (as wget) by program (as Cshell script) and meteorological data is downloaded to server, then input meteorologic model.Inventor finds, this kind of technical scheme exists following defect:
1, speed of download is slow.With the NCEPGFS data instance of 72 hours spatial resolutions 0.5 degree, data set size is about 1.5G, and download time needs 2-3 hour.
2, downloading reliability is poor.As network failure or unstable networks, often cause system card to download link in data, model cannot run.
It is the topmost fault of meteorologic model system that businessization is run that meteorological data downloads fault.According to certain Air Quality Forecast forecast system operating statistic, the frequency of the forecast result that is monthly out of order, cannot exports on time, three or four days at least, seven or eight days even ten days at most, and failure cause to be nearly all meteorological data fail normally downloads.
Summary of the invention
Technical problem to be solved by this invention, the speed of download existed for meteorological data download in meteorologic model system is slow, the problem of poor reliability, the present invention proposes a kind of system improving meteorological data downloading reliability and speed in meteorologic model system, ensure that meteorological data is downloaded master server and dependent server and all can obtain complete meteorological dataset on the intact basis of arbitrary network, substantially increase the reliability that meteorological data is downloaded; Multiple download server downloads different contents simultaneously, and adopts multithreading download tool to download on each server, greatly accelerates speed of download.
The present invention solve the technical problem, and the technical scheme of employing is, improves the system of meteorological data downloading reliability and speed in meteorologic model system, comprises meteorological data and downloads master server, also comprise at least one dependent server;
Described meteorological data downloads master server, dependent server and meteorological data download master server is sent to respectively for receiving downloading task and downloading task being decomposed into some parts, described task number is the quantity summation that dependent server and meteorological data download master server, meteorological data is downloaded master server and is carried out data download according to the downloading task received, and downloading data and dependent server are transmitted data integrates;
Described dependent server, for carrying out data download according to the downloading task received, and downloads master server by download data transmissions to meteorological data.
Concrete, described meteorological data downloads master server and dependent server is in different network environments respectively.
Concrete, described meteorological data is downloaded in master server and is provided with data detection module one;
Described data detection module one, transfer to meteorological data download downloading data in master server for detecting dependent server, if detect wrong, the downloading task after meteorological data download master server transfers decomposition corresponding to this dependent server carries out task download, otherwise is failure to actuate.
Further, data detection module two is provided with in described dependent server;
Described data detection module two, the downloading data of master server is downloaded for remote detection meteorological data, if detect wrong, downloading task after dependent server transfers decomposition corresponding to meteorological data download master server is carried out task download and download data transmissions is downloaded master server to meteorological data, otherwise is failure to actuate.
Further, dependent server downloads master server by FTP transmission means transmission downloading data to meteorological data.
Further, described dependent server and meteorological data are downloaded in master server and are adopted multithreading download tool to carry out data download respectively.
Further, described dependent server and meteorological data are downloaded in master server and are respectively arranged with download file correction verification module;
Described download file correction verification module, for detecting the file downloaded in real time, if the file downloaded is wrong, again downloading, otherwise being failure to actuate.
Improve the method for meteorological data downloading reliability and speed in meteorologic model system, comprise the following steps:
Step 1, system issue meteorological data downloading task and download master server to meteorological data, the downloading task of reception is decomposed into some parts and is sent to dependent server and meteorological data download master server respectively by meteorological data download master server, and described task number is the quantity summation that dependent server and meteorological data download master server;
Step 2, meteorological data download master server and dependent server carries out data download according to the downloading task received respectively;
Download data transmissions is downloaded master server to meteorological data by step 3, dependent server, and self downloading data and dependent server are transmitted data by meteorological data download master server to be integrated.
Concrete, in described step 1, meteorological data downloads master server and dependent server is in different network environments respectively.
Concrete, further comprising the steps of:
Step 4, system detect dependent server in real time and transfer to meteorological data and download downloading data in master server, if detect wrong, meteorological data is downloaded master server and transferred downloading task corresponding to this dependent server and carry out data download, otherwise is failure to actuate.
Concrete, further comprising the steps of:
Step 5, Systematical control dependent server remote detection meteorological data download the downloading data of master server, if detect wrong, dependent server is transferred downloading task corresponding to meteorological data download master server and is carried out data download and downloaded data are transferred to meteorological data downloading master server, otherwise is failure to actuate.
Concrete, in described step 3, dependent server downloads master server by FTP transmission means transmission downloading data to meteorological data.
Concrete, described dependent server and meteorological data are downloaded in master server and are adopted multithreading download tool to carry out data download respectively.
Concrete, further comprising the steps of:
While dependent server and meteorological data download master server carry out data download, system detects the file downloaded in real time, if downloaded file is wrong, again downloads, otherwise is failure to actuate.
The invention has the beneficial effects as follows: downloaded respectively by several subordinate download servers and master server respectively by increasing at least one subordinate download server and downloading task being decomposed into some parts, server downloads different contents simultaneously, dependent server and meteorological data are downloaded in master server and are adopted multithreading download tool to carry out data download respectively simultaneously, greatly accelerate speed of download;
Subordinate download server and master server are in different network environments, ensure that master server and dependent server all can obtain complete meteorological dataset on the intact basis of arbitrary network; Simultaneously, whether the downloading data that dependent server and master server detect the other side is mutually correctly complete, is correctly then failure to actuate, otherwise the downloading task transferring the other side is downloaded again, ensure that the integrality that data are downloaded, substantially increase the reliability that meteorological data is downloaded.
Accompanying drawing explanation
Fig. 1 is the meteorologic model system construction drawing based on WRF model in background technology of the present invention;
Fig. 2 is network topological diagram in the embodiment of the present invention;
Fig. 3 is working-flow figure in the embodiment of the present invention.
Below in conjunction with the embodiment of embodiment, foregoing of the present invention is described in further detail again.But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following example.Without departing from the idea case in the present invention described above, the various replacement made according to ordinary skill knowledge and customary means or change, all should comprise within the scope of the invention.
Embodiment
Technical scheme of the present invention is described in detail below in conjunction with drawings and Examples:
To the present invention is directed in prior art meteorological data in meteorologic model system and download that the speed of download existed is slow, the problem of poor reliability, a kind of system improving meteorological data downloading reliability and speed in meteorologic model system is provided, comprise meteorological data and download master server, also comprise at least one dependent server; Described meteorological data downloads master server, dependent server and meteorological data download master server is sent to respectively for receiving downloading task and downloading task being decomposed into some parts, described task number is the quantity summation that dependent server and meteorological data download master server, and meteorological data is downloaded master server and carried out data download according to the downloading task received; Described dependent server, for carrying out data download according to the downloading task received, and downloads master server by download data transmissions to meteorological data.Improve the method for meteorological data downloading reliability and speed in meteorologic model system, first, system issues meteorological data downloading task and downloads master server to meteorological data, the downloading task of reception is decomposed into some parts and is sent to dependent server and meteorological data download master server respectively by meteorological data download master server, and described task number is the quantity summation that dependent server and meteorological data download master server; Secondly, meteorological data download master server and dependent server thereof carry out data download according to the downloading task received respectively; Finally, download data transmissions is downloaded master server to meteorological data by dependent server.Downloaded respectively by several subordinate download servers and master server respectively by increasing at least one subordinate download server and downloading task being decomposed into some parts, server downloads different contents simultaneously, dependent server and meteorological data are downloaded in master server and are adopted multithreading download tool to carry out data download respectively simultaneously, greatly accelerate speed of download; Subordinate download server and master server are in different network environments, ensure that master server and dependent server all can obtain complete meteorological dataset on the intact basis of arbitrary network; Simultaneously, whether the downloading data that dependent server and master server detect the other side is mutually correctly complete, is correctly then failure to actuate, otherwise the downloading task transferring the other side is downloaded again, ensure that the integrality that data are downloaded, substantially increase the reliability that meteorological data is downloaded.
Embodiment
The system of meteorological data downloading reliability and speed in the raising meteorologic model system of this example, comprises meteorological data and downloads master server, also comprise at least one dependent server.Wherein, meteorological data downloads master server, dependent server and meteorological data download master server is sent to respectively for receiving downloading task and downloading task being decomposed into some parts, described task number is the quantity summation that dependent server and meteorological data download master server, and meteorological data is downloaded master server and carried out task download according to after the downloading task after the decomposition received; Described dependent server, for carrying out task download according to the downloading task after the decomposition received, and download master server by FTP transmission means transmission downloading data to meteorological data, self downloading data and dependent server are transmitted data by meteorological data download master server to be integrated.After completing the download of all data and integration, meteorological data is downloaded master server and the data after integration is sent to meteorologic model server.Preferably, dependent server and meteorological data are downloaded in master server and are adopted multithreading download tool to carry out data download respectively.Downloaded respectively by several subordinate download servers and master server respectively by increasing at least one subordinate download server and downloading task being decomposed into some parts, server downloads different contents by multithreading download tool simultaneously, greatly accelerates speed of download.
Preferably, described server and dependent server are in different network environments respectively.When any one network environment breaks down, as long as another network keeps clear, data all can normally be downloaded.Network topological diagram is shown in Fig. 2.
In order to ensure reliability and the accuracy of downloading data further, described meteorological data is downloaded in master server and is provided with data detection module one; Described data detection module one, transfer to meteorological data download downloading data in master server for detecting dependent server, if detect wrong, the downloading task after meteorological data download master server transfers decomposition corresponding to this dependent server carries out task download, otherwise is failure to actuate.Data detection module two is provided with in described dependent server; Described data detection module two, the downloading data of master server is downloaded for remote detection meteorological data, if detect wrong, downloading task after dependent server transfers decomposition corresponding to meteorological data download master server is carried out task download and download data transmissions is downloaded master server to meteorological data, otherwise is failure to actuate.Whether the downloading data that dependent server and master server detect the other side is mutually correctly complete, is correctly then failure to actuate, otherwise the downloading task transferring the other side is downloaded again, ensure that the integrality that data are downloaded, and substantially increases the reliability that meteorological data is downloaded.Preferably, described dependent server and meteorological data are downloaded in master server and are respectively arranged with download file correction verification module; Described download file correction verification module, for detecting current download file in real time, if current download file is wrong, again downloading, otherwise being failure to actuate.Ensure that the validity of download file.
The system specific works flow process of meteorological data downloading reliability and speed in the raising meteorologic model system that this example provides, as shown in Figure 3.
Meteorological data is downloaded subprogram and is started, and meteorological data is downloaded master server, according to certain mode, downloading task is decomposed into default number, decomposes the quantity summation of number preferably master server and dependent server.Carrying out decomposition to downloading task is those skilled in the art's conventional techniques means, repeats no more herein and how to enter Task-decomposing.After carrying out downloading task decomposition, system is downloaded in master server and dependent server in meteorological data respectively and is performed respective downloading task.
Meteorological data is downloaded master server and is started to perform downloading task, calls multithreading download tool and downloads, until self downloading task completes by downloading.In task downloading process, after each file download completes, meteorological data is downloaded master server and is verified the file that current download completes, and method of calibration is determined according to file attributes, the attribute byte, MD5 condition code etc. of such as file size, top of file and afterbody.As unsuccessful in verified, then restart the download of this file.
Meanwhile, dependent server performs downloading task and verifies, and verification mode is consistent with the file verification mode in master server.The file downloaded and verified is transferred to main download server by modes such as FTP after completing the task download of self by dependent server.
After meteorological data download master server completes the downloading task of oneself, the file started dependent server transmits checks, as file is complete, is then carried out integrating and gathering by all meteorological data files, for meteorological model server, download end of subroutine.As file is imperfect, then meteorological data is downloaded master server continuation and is downloaded the part lacked, until by All Files completion, then carries out integrating and gathering, downloads end of subroutine.
After dependent server completes the downloading task of oneself, the file situation that meteorological data downloads master server download is obtained by modes such as remote accesses, file meteorological data being downloaded to master server download checks, as file is complete, then dependent server EP (end of program) is run; As file is imperfect, then dependent server continues to download the part lacked, and transfers to meteorological data download master server, downloads master server carry out integrating and gathering by meteorological data.
By above measure, ensure that meteorological data is downloaded master server and dependent server and all can obtain complete meteorological dataset on the intact basis of arbitrary network, substantially increase the reliability that meteorological data is downloaded; Two servers download different contents simultaneously, greatly accelerate speed of download.
For a certain Air Quality Forecast forecast system, its meteorological data downloads the original mode adopting Cshell to call wget single-threaded download NCEPGFS data, the fault of frequent generation meteorological data failed download, cause system cannot submit forecast result on time, failure rate higher (more than 20%), and its meteorological data is downloaded and is consuming timely reached 2-3 hour.After adopting the technological means in the present invention, failure rate is reduced to less than 5%, and meteorological data download is consuming time foreshortens to about 40 minutes, and system reliability, real-time improve greatly.
Claims (10)
1. improve the system of data downloading reliability and speed in meteorologic model system, comprise meteorological data and download master server, it is characterized in that, also comprise at least one dependent server;
Described meteorological data downloads master server, dependent server and meteorological data download master server is sent to respectively for receiving downloading task and downloading task being decomposed into some parts, described task number is the quantity summation that dependent server and meteorological data download master server, meteorological data is downloaded master server and is carried out data download according to the downloading task received, and the data that downloading data and dependent server transmit is integrated;
Described dependent server, for carrying out data download according to the downloading task received, and downloads master server by download data transmissions to meteorological data.
2. according to the system of data downloading reliability and speed in raising meteorologic model system according to claim 1, it is characterized in that, described meteorological data downloads master server and dependent server is in different network environments respectively.
3. according to the system of data downloading reliability and speed in raising meteorologic model system according to claim 1, it is characterized in that, described meteorological data is downloaded in master server and is provided with data detection module one; Described data detection module one, transfer to meteorological data download downloading data in master server for detecting dependent server, if detect wrong, the downloading task after meteorological data download master server transfers decomposition corresponding to this dependent server carries out task download, otherwise is failure to actuate;
Data detection module two is provided with in described dependent server; Described data detection module two, the downloading data of master server is downloaded for remote detection meteorological data, if detect wrong, downloading task after dependent server transfers decomposition corresponding to meteorological data download master server is carried out task download and download data transmissions is downloaded master server to meteorological data, otherwise is failure to actuate.
4. according to the system of data downloading reliability and speed in the raising meteorologic model system in claim 1-3 described in any one, it is characterized in that, dependent server downloads master server by FTP transmission means transmission downloading data to meteorological data; Described dependent server and meteorological data are downloaded in master server and are adopted multithreading download tool to carry out data download respectively.
5. according to the system of data downloading reliability and speed in raising meteorologic model system according to claim 4, it is characterized in that, described dependent server and meteorological data are downloaded in master server and are respectively arranged with download file correction verification module;
Described download file correction verification module, for detecting the file downloaded in real time, if the file downloaded is wrong, again downloading, otherwise being failure to actuate.
6. improve the method for data downloading reliability and speed in meteorologic model system, it is characterized in that, comprise the following steps:
Step 1, system issue meteorological data downloading task and download master server to meteorological data, the downloading task of reception is decomposed into some parts and is sent to dependent server and meteorological data download master server respectively by meteorological data download master server, and described task number is the quantity summation that dependent server and meteorological data download master server;
Step 2, meteorological data download master server and dependent server carries out data download according to the downloading task received respectively;
Download data transmissions is downloaded master server to meteorological data by step 3, dependent server, and self downloading data and dependent server are transmitted data by meteorological data download master server to be integrated.
7. according to the method for data downloading reliability and speed in raising meteorologic model system according to claim 6, it is characterized in that, in described step 1, meteorological data downloads master server and dependent server is in different network environments respectively.
8., according to the method for data downloading reliability and speed in raising meteorologic model system according to claim 6, it is characterized in that, further comprising the steps of:
Step 4, system detect dependent server in real time and transfer to meteorological data and download downloading data in master server, if detect wrong, meteorological data is downloaded master server and transferred downloading task corresponding to this dependent server and carry out data download, otherwise is failure to actuate;
Step 5, Systematical control dependent server remote detection meteorological data download the downloading data of master server, if detect wrong, dependent server is transferred downloading task corresponding to meteorological data download master server and is carried out data download and downloaded data are transferred to meteorological data downloading master server, otherwise is failure to actuate.
9. according to the method for data downloading reliability and speed in raising meteorologic model system according to claim 6, it is characterized in that, in described step 3, dependent server downloads master server by FTP transmission means transmission downloading data to meteorological data; Described dependent server and meteorological data are downloaded in master server and are adopted multithreading download tool to carry out data download respectively.
10., according to the system of data downloading reliability and speed in raising meteorologic model system according to claim 6, it is characterized in that, further comprising the steps of:
While dependent server and meteorological data download master server carry out data download, system detects the file downloaded in real time, if downloaded file is wrong, again downloads, otherwise is failure to actuate.
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Application publication date: 20160203 |