JP2005031807A - Data update method and data processing system in data processing system - Google Patents

Abstract

The present invention provides data consistency at each business terminal without interrupting the business.
The present invention provides a data management terminal in an environment in which a plurality of terminals connected using communication lines individually have information and update information individually, and update contents of the individual terminals are displayed. The update contents reflected on all terminals and the update contents reflected on the data management terminal are transmitted to each terminal in a differential format, and the data of each terminal is updated with this content, so that the consistency of data of multiple terminals is taken. It is a thing.
[Selection] Figure 2

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a data processing system having a plurality of business terminals each performing business and a data management terminal connected to each business terminal via a communication line.
[0002]
[Prior art]
As a method for maintaining consistency while sharing data between different terminals, there is a client server system in which a server that centrally manages data and a terminal that accesses data on the server are connected via a network. Since no data is held on the terminal side and the data in the server is the only data, the same level of data can be handled by a plurality of terminals.
[0003]
Such a method works in real time on individual data, such as application data entry on the application form, issuance examination for the entered data, and a certificate issuance system that creates a certificate based on the examination results. It is effective for a system that performs typical processing.
[0004]
As another method, there is a method of giving equivalent data to both a data management terminal instead of a server and a plurality of connected terminals. Each terminal updates its own data every time data is updated, and transmits the updated contents to the data management terminal. The data management terminal reflects the update content received from each terminal in the data in the data management terminal. By doing so, the data in the data management terminal is always kept up-to-date. However, since the update content at each terminal is not transmitted to other terminals, there is a difference in data between terminals. In order to eliminate this difference, data consistency can be improved by copying all data in the data management terminal to a storage medium at regular intervals and using this storage medium to totally replace the data of each terminal. keep. Consistency can also be maintained by a method of performing total replacement via a network without using a storage medium.
[0005]
When the scale is not so large, for example, when one server and several terminals are connected and a high-speed communication line can be used, this configuration is effective. However, when one server and hundreds of terminals are connected and the communication line is low speed, etc., the data transferred between the server and the terminal is reduced, and hundreds of units concentrate on the data in one server. It is conceivable that a temporary lock of the server occurs due to this.
[0006]
Further, in the method using the data management terminal, the operation at the terminal must be stopped while the storage medium / network is used to perform total replacement of data in the terminal.
FIG. 1 is a diagram schematically showing a system configuration of a conventional data processing system. (See Patent Document 1)
Business terminals 2 to 6 are connected to the data management terminal 1 via a network. The data management terminal 1 and the business terminals 2 to 6 each perform the same type of data management. The contents updated in each of the business terminals 2 to 6 are updated in the data management terminal 1. The data management terminal 1 that has received the transmission of the update content immediately reflects the update content in the data in the data management terminal 1. Thereby, the data held by the data management terminal 1 is always in the latest state, but the data held by the business terminals 2 to 6 does not reflect the update contents of other business terminals for a while. (For example, the business terminal 2 reflects its own update content as needed, but cannot reflect it because it has not received the update content notification from the business terminals 3 to 6).
[0007]
In the data update of the business terminals 2 to 6, since the data of the data management terminal 1 is always the latest, the data management terminal 1 outputs all data held in the data management terminal 1 to the storage medium at a specific time. . The data of the data management terminal 1 and the business terminals 2 to 6 become the same only when the data of the business terminals 2 to 6 are totally replaced with the contents of the storage medium. With this method, as the number of data items held in the data management terminal 1 increases, the data output to the storage medium increases, and as a result, the total replacement time in the business terminals 2 to 6 increases. It was.
[0008]
[Patent Document 1]
JP-A-10-091735.
[0009]
[Problems to be solved by the invention]
The present invention relates to a plurality of business terminals each performing business, and a data management terminal connected to each business terminal via a low-speed communication line, and each business terminal stores the processing contents of each business terminal in common. It is an object of the present invention to provide a data processing system that can maintain data consistency at each business terminal without interrupting the business.
[0010]
[Means for Solving the Problems]
The data update method in the data processing system according to the present invention includes a plurality of business terminals and a data management terminal connected to each business terminal via a communication line. Owns the data and periodically sends the data update contents in the business terminal to the data management terminal in the form of differential data, and the data management terminal that receives the data updates its own data and receives data from multiple business terminals. The data management terminal that has received the differential data for update transmits all the update contents to the business terminal in the form of differential data for all the data, and the business terminal that receives the data updates its own data.
[0011]
The data processing system of the present invention has a plurality of business terminals and a data management terminal connected to each business terminal via a communication line, and the data management terminal and the business terminal hold equivalent data The first transmission means for periodically transmitting the update contents of the data at the business terminal to the data management terminal in the form of differential data, and the first data management terminal updating its own data by the difference data. The update means, the second transmission means for receiving the update difference data from the plurality of business terminals, the second transmission means for sending all update contents to each business terminal in the form of differential data for all data, and the difference data Thus, each business terminal has second update means for updating its own data.
[0012]
The data processing system according to the present invention includes a plurality of business terminals and a data management terminal connected to each business terminal via a communication line. The business terminal is a time-series processing content of each business terminal. Is stored on the basis of the version information corresponding to the date and time, and the contents of the business process by the business terminal are given the latest version information of the first storage means and transmitted to the data management terminal A first transmission means, and a first series of time-series processing contents of each business terminal after the latest version information obtained in response to the transmission of the first transmission means is additionally stored in the first storage means. A second storage means for sequentially storing the contents of the business process supplied from the business terminals based on version information corresponding to the date and time, and the data management terminal The version information of each business terminal supplied together with the content of business processing supplied from the business terminal is compared with the latest version information of the first storage means, and the content of the business process of the difference together with the version information is compared. Second transmitting means for transmitting to each business terminal.
[0013]
The data processing system according to the present invention includes a plurality of business terminals and a data management terminal connected to each business terminal via a communication line. The business terminal is a time-series processing content of each business terminal. Is stored on the basis of the version information corresponding to the date and time, and the contents of the business process by the business terminal are given the latest version information of the first storage means and transmitted to the data management terminal A first transmission means, and a first series of time-series processing contents of each business terminal after the latest version information obtained in response to the transmission of the first transmission means is additionally stored in the first storage means. A second storage means for sequentially storing the contents of the business process supplied from the business terminals based on version information corresponding to the date and time, and the data management terminal The version information of each business terminal supplied together with the content of the business process supplied from the business terminal is compared with the latest version information of the first storage means, and the business process of the difference that differs for each business terminal is compared. Second transmission means for transmitting the contents together with the version information to each business terminal.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a data processing system according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 2 is a diagram schematically showing the system configuration of the data processing system of the present invention.
[0015]
Business terminals 12 to 16 are connected to the data management terminal 11 via a network. Each of the data management terminal 11 and the business terminals 12 to 16 performs the same kind of data management. The contents updated in each of the business terminals 12 to 16 are updated in the data management terminal 11. The data management terminal 11 that has received the transmission of the update content immediately reflects the update content on the data in the data management terminal 11. Thereby, the data held by the data management terminal 11 is always in the latest state, but the data held by the business terminals 12 to 16 does not reflect the update contents of other business terminals for a while. (For example, the business terminal 12 reflects its own update content as needed, but cannot reflect it because it has not received notification of the update content at the business terminals 13 to 16).
[0016]
The data management terminal 11 creates a difference file at regular time intervals using the update contents received from the business terminals 12 to 16. All the updated contents in the business terminals 12 to 16 are reflected in this difference file. The business terminals 12 to 16 periodically monitor the creation of the difference file in the data management terminal 11, and when the occurrence of the difference file is detected, the business terminals 12 to 16 acquire the difference file and reflect the updated contents in their own data. Since the difference data includes the data update contents in all the business terminals, the data held by the data management terminal 11 and the data owned by the business terminals become the same data when the contents of the difference data are reflected.
[0017]
Therefore, according to the present invention, in the conventional method, where the total data replacement is performed, the difference file created periodically is applied to reduce the replacement time and the data consistency with a slight time lag. Ensuring is feasible.
[0018]
Next, update data notification (business terminal 12 (13,...) → data management terminal 11) according to the present invention will be described with reference to FIG.
(1) The business terminal 12 periodically outputs generated data to a file and copies it to a specific folder 21 on the data management terminal 11.
(2) The data management terminal 11 refers to the specific folder 21 periodically. If the file to be processed exists, its own data update process is executed based on the file. After execution, the processed file is deleted, and the version of the completed file is set in a message between the data management terminal 11 and the business terminal 12.
(3) A version is assigned to the file.
File name (version): Data type_YYYYMMDDnnnn
Data type: Header YYYYMMDD for identifying the data type: Year, month, day nnnn: Serial number of data created periodically (4) A conceptual diagram of file exchange between the business terminal 12 and the data management terminal 11 is a diagram As shown in FIG. The data management terminal 11 side refers to a specific folder, acquires an unprocessed file, and updates its own data based on this.
[0019]
Next, update data notification (data management terminal 11 → business terminal 12 (13,...)) According to the present invention will be described.
(1) As shown in FIG. 4, the update data on the data management terminal 11 is updated every hour, and a file (difference data) storing update contents is created to reflect this on the business terminal 12.
(2) As shown in FIG. 5, separately from the difference data created every hour, date closing data is created by collecting these data in units of one day.
[0020]
Next, a version assignment format according to the present invention will be described.
(1) The difference data / date closing data for update is stored in the data management terminal 11 as a file as shown in FIG. A version is assigned to identify the file creation order, and is attached to the file name. The difference file is stored in the specific folder 21.
File name (version): Data type_YYYYMMDDnnnn
Data type: header for identifying the data type YYYYMMDD: year, month, day nnnn: serial number 0000 of the difference data created every hour → all data 9999 of the latest version of the day → date closing data of the day (2) As shown in FIG. 7, if the version of data in the business terminal 12 is “ABC — 200211010000”, the business terminal 12 can apply the difference data generated after 2002/11/01 and apply the data after applying this. The latest state is the same as that of the terminal 11.
[0021]
Next, the range of obtained data according to the present invention will be described.
(1) The latest version of the latest version data is stored in a message sent and received between the data management terminal 11 and the business terminal 12 (13,...) As shown in FIG. The business terminal 12 side can obtain the latest version of the difference data by referring to this.
(2) Captured version The business terminal 12 side manages the version of the captured differential data. For example, when the business terminal 12 is powered on, it obtains differential data from the data management terminal 11 onwards after the version that has been captured.
(3) Therefore, as shown in FIG. 9, if the latest version on the data management terminal 11 side is “200211040003” and the captured version on the business terminal 12 side is “200211030001”, the difference file between them is managed by data management. By acquiring and applying from the terminal 11, the latest data can be reflected.
[0022]
Next, obtaining a list of difference files according to the present invention will be described with reference to FIG.
(1) In order to update the data on the business terminal 12 (13,...) Side, the difference file is obtained from the data management terminal 11. Prior to this process, it is necessary to obtain a file list. To obtain the file list, the standard FTP command Dir is used.
(2) When the Dir command is unconditionally called to the data management terminal 11 when obtaining the file list for the specific folder 21 storing the difference file, the version information that has been updated is also obtained. Therefore, a load is applied to the network traffic, the data management terminal 11 and the business terminal 12.
(3) Therefore, the list of files to be obtained is narrowed down from the “latest version” stored on the message between the data management terminal 11 and the business terminal 12 and the “imported version” managed on the business terminal 12 side.
1) When the latest version = the imported version, there is no difference file to be obtained, so the Dir command is not called.
2) When the date of the latest version matches the date of the imported version a) Add a wild card to the last 4 digits of the serial number and call the Dir command.
[0023]
Example) Dir ABC_20021105? ? ? ? Result storage file name b) As a result, it is not necessary to obtain an unnecessary version before 200001104 as a file list. 3) When the last digit of DD does not match among the date of the latest version and the imported version a) Sequential number A wild card is assigned to the last 4 digits of the part and the last digit of the date, and the Dir command is called.
[0024]
Example) Dir ABC — 2002110? ? ? ? ?
b) As a result, it is not necessary to obtain unnecessary versions prior to 20021031 as a file list. 4) Thereafter, a search condition for the Dir command is generated from the latest version in the message and the imported version on the business terminal 12 side, and the file to be obtained Narrow down the list.
[0025]
Next, selection of the difference file and the date closing file according to the present invention will be described.
(1) The file to be acquired from the data management terminal 11 is determined from the obtained file list.
(2) The upper and lower limits of the version can be determined from the narrowed-down version with the latest version. (3) The date part has the same value in the version list, and the serial number part exists from 0001 to nnnn. If there is date closing data (serial number portion is 9999), it is not necessary to acquire files with serial number portions from 0001 to nnnn. You only need to get a date file.
[0026]
In this case, as shown in FIG. 11, when the latest version “20021106003” and the narrowed-down version “200211030002”, the contents of the files up to NO10 have already been acquired, so the difference files of NO11, NO16, NO19 day-end files, The difference files of NO21, NO22, and NO23 are to be acquired.
[0027]
However, the date closing file of NO12 is unnecessary because the corresponding difference file is acquired. Further, the difference file from NO13 to NO15 is unnecessary because the corresponding date closing file of NO16 is acquired. Further, the difference file from NO17 to NO19 is unnecessary because the corresponding date closing file of NO20 is acquired. Further, the difference file from NO13 to NO15 is acquired because there is no corresponding date closing file.
(4) Even if a date closing file exists between the version already imported and the latest version in the version list, if the application is completed with a difference file with the same date, the difference file is not the date closing file. Apply.
[0028]
In this case, as shown in FIG. 12, when the latest version “20021106001” and the narrowed-down version “200211050001”, the contents of the files up to NO17 have already been acquired, so the difference files of NO18, NO19, and NO21 are the acquisition targets. .
[0029]
As described above, the data management terminal and the business terminal have equivalent data, and the data update content at the business terminal is periodically transmitted to the data management terminal in the form of differential data, and the data management terminal that receives it Updates its own data. A data management terminal that receives differential update data from multiple business terminals sends all update contents to the business terminal in the form of differential data for all data, and the business terminal that receives the update updates its own data. .
In other words, data consistency with other terminals can be achieved without interrupting work.
[0030]
Also, in an environment in which a plurality of terminals connected using a communication line individually have information and the information is individually updated, the update contents at other terminals are reflected on the own terminal.
[0031]
A plurality of terminals connected using communication lines individually have information, and in an environment in which information is individually updated, a data management terminal is prepared and the updated contents of each terminal are reflected for all terminals. The update contents reflected by the data management terminal are transmitted to each terminal in a differential format, and the data of each terminal is updated with the contents, thereby ensuring the consistency of the data of a plurality of terminals.
[0032]
As a result, data consistency can be maintained in real time even during normal work without temporarily stopping the work, such as total replacement of data using the night, so that work hours due to business stagnation and night work can be reduced.
[0033]
In addition, since the data of each terminal is updated using the difference data instead of performing the total data exchange online / offline, the load on the network can be reduced.
[0034]
In addition, since the update contents are not notified from a plurality of terminals to a plurality of terminals, the update contents are notified from one terminal to one data management terminal, so that the data control is simple and the network Compared to data access via the network, access to local data makes it possible to increase the processing speed.
[0035]
Also, with the conventional method, it is possible to reduce the replacement time and ensure data consistency with a slight time lag by applying a differential file that is created periodically, where data is totally replaced. .
[0036]
【The invention's effect】
As described in detail above, according to the present invention, a plurality of business terminals each performing business, and each business terminal is connected to each business terminal via a low-speed communication line. A data processing system that can maintain data consistency in each business terminal without interrupting the business can be provided in a system having a data management terminal that is stored in common.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a system configuration of a conventional data processing system.
FIG. 2 is a schematic diagram showing a system configuration of a data processing system according to the present invention.
FIG. 3 is a conceptual diagram of file exchange between a business terminal and a data management terminal.
FIG. 4 is a diagram for explaining difference data creation processing;
FIG. 5 is a view for explaining date closing data creation processing;
FIG. 6 is a diagram for explaining a version assignment format;
FIG. 7 is a diagram for explaining a version assignment format;
FIG. 8 is a diagram illustrating an example of a message transmitted and received between a data management terminal and a business terminal.
FIG. 9 is a diagram for explaining difference data acquisition processing;
FIG. 10 is a diagram for explaining difference data acquisition processing;
FIG. 11 is a diagram for explaining a process for obtaining difference data and date closing data.
FIG. 12 is a diagram for explaining a process for obtaining difference data and date closing data.
[Explanation of symbols]
11 ... Data management terminal, 12 ... Business terminal

Claims (4)

In a data update method in a data processing system having a plurality of business terminals and a data management terminal connected to each business terminal via a communication line,
The data management terminal and the business terminal have the same data, and the data update content on the business terminal is periodically sent to the data management terminal in the form of differential data. The data management terminal that received the update differential data from multiple business terminals sends all the update contents to the business terminal in the form of differential data for all data, and the business terminal that received the data updates its own data A data processing system characterized by updating. In a data processing system having a plurality of business terminals and a data management terminal connected to each business terminal via a communication line, and holding the same data in the data management terminal and the business terminal,
First transmission means for periodically transmitting data update contents in the business terminal to the data management terminal in the form of difference data;
With this difference data, the data management terminal updates its own data, a first update means,
A data management terminal that receives differential data for update from a plurality of business terminals, a second transmission means for transmitting all update contents to each business terminal in the form of differential data for all data;
With this difference data, each business terminal updates its own data, a second update means,
A data processing system comprising: In a data processing system having a plurality of business terminals and a data management terminal connected via a communication line with each business terminal,
The business terminal
First storage means for storing time-series processing contents of each business terminal based on version information corresponding to the date and time;
First transmission means for giving the latest version information of the first storage means and transmitting the contents of the business processing by the business terminal to the data management terminal;
First processing means for additionally storing time series processing contents of each business terminal after the latest version information obtained in response to transmission of the first transmission means in the first storage means; ,
The data management terminal
Second storage means for sequentially storing the contents of the business process supplied from each business terminal based on version information corresponding to the date and time;
The version information of each business terminal supplied together with the contents of the business process supplied from each business terminal is compared with the latest version information of the first storage means, and the contents of the business process of the difference are compared with the version. A data processing system comprising: second transmission means for transmitting information to each business terminal. In a data processing system having a plurality of business terminals and a data management terminal connected to each business terminal via a communication line,
The business terminal
First storage means for storing time-series processing contents of each business terminal based on version information corresponding to the date and time;
First transmission means for giving the latest version information of the first storage means and transmitting the contents of the business processing by the business terminal to the data management terminal;
First processing means for additionally storing time series processing contents of each business terminal after the latest version information obtained in response to transmission of the first transmission means in the first storage means; ,
The data management terminal
Second storage means for sequentially storing the contents of the business process supplied from each business terminal based on version information corresponding to the date and time;
The version information of each business terminal supplied together with the contents of the business process supplied from each business terminal is compared with the latest version information of the first storage means, and the business of differences differing for each business terminal A data processing system comprising: a second transmission unit configured to transmit the content of processing to each of the business terminals together with version information thereof.

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