JPS6083151A - Control system of data processing level - Google Patents

Abstract

PURPOSE:To enable a specific applied program to access to a data store part in accordance with the contents of work by selecting the work to control the effective items of a control table which controls the accessible applied program according to the work. CONSTITUTION:A work selecting circuit 13 outputs a selection signal A when the work A is performed. Then a control table 12 informs a data base control circuit 11 that all applied programs RO-WO are ready for working. Therefore the programs RO-WO are controlled by the exclusive control based on a table T1 to perform the on-line work. Then the table 12 informs that programs RO, ER and CER are ready for working when a selection signal B is outputted. Then the circuit 11 performs the exclusive control based on the table T1 and also stops the working of programs MD, UP and WO by the working indications of only programs RO, ER and CER.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a data processing level control method, and in particular, a method for adding restrictions to data processing modes that can be operated in accordance with the business in order to guarantee data identity. This allows data processing only for modes within a pre-allowed range.

[Technology background]

In current data processing devices, multiple application programs simultaneously use one data to perform data processing. In this case, it is necessary to guarantee data consistency (integrity), and the data processing level is taken into consideration in order to increase data processing efficiency while guaranteeing data consistency. For example, when a first application program accesses database A and updates its data a to a', and then a second application program updates data a' to a'', the first application program When this becomes an abnormal end due to an unexpected accident, it is necessary to restore the data updated by this f4S1 application program, but at this time, the second application program updates the data from a' to a'. Therefore, it is not possible to restore a'→a. In order to prevent this, the data processing level is specified by performing exclusive control so that the second application program cannot operate when the first application program that has such a relationship updates the database. are doing.

By the way, application programs can be broadly classified into those having the following six types of access modes. In other words, ■Read-only mode (ReadOnly: RO
), ■Exclusive read-only mode (Exc-Iusiv
e Read: ER), ■Completely exclusive read only
Read: CER), ■Data record update mode (Modify: MD) +■Data structure update mode (Update: UP) +■Creation mode or write-only mode (Write 0nly: W)
O). In each of these modes, simultaneous processing is possible (○ mark) and simultaneous processing is impossible (x mark) in a state as shown in the 1m2 diagram, and the preceding program has priority.

[Prior art and problems]

By the way, as shown in Figure 1, for example, from 9:00 a.m. to 3:00 p.m., an online business person updates the contents of records and blocks sequentially in the database or data set DB, and from 3:00 p.m. to 9:00 p.m. and Data Sera)
When performing batch-type job B of search-like data processing that outputs the contents of records and blocks in a form to a DB, a business application program for the business person and job B must be developed separately.

Exclusive rose-off work was required for each break in the business, making operation difficult. That is, when a task is completed halfway and 3:00 pm arrives, it is necessary to finish the partially executed task and then move on to task B, which is difficult to manage.

Moreover, if the system environment remains unchanged, that is, if the input data can perform both job A and job B, the operator's input error may cause job B to be executed, which would normally only involve data retrieval. There is also a risk that the data may be updated.

In banking operations, etc., there is also a problem in terms of reliability.

Note that when data is opened, it is necessary to indicate whether the data can be shared with other programs or not, indicating whether it can be shared or not.

Moreover, in some cases, it may not be possible to successfully switch jobs A and B without changing not only the job control statement (JCL) but also the catalog that defines how these application programs open data.

Moreover, as mentioned above, data protection is incomplete because unnecessary data may be updated due to operator error.

[Purpose of the invention]

The purpose of the present invention is to improve this problem by defining a data processing level that is not used in the execution of the business, and
The present invention provides a data processing level control system that allows only those programs that conform to this regulation to operate when executing application programs.

[Structure of the invention]

To accomplish this purpose, the data processing level 1 of the present invention
In the ttln method, different tasks are performed by a plurality of application programs, and when the application programs access the data storage section, the plurality of application programs are executed in a data processing device controlled by an access mode defined by exclusive control. a database management unit that manages access operations of application programs to the data storage unit; a management table that defines application programs that can be accessed according to business;
The present invention is characterized in that a task selection section is provided to control valid items in the management table by selecting a task, and control is performed so that only a specific application program can access the data storage section according to the task content.

[Embodiments of the invention]

Before describing the present invention in detail based on one embodiment.

The outline will be explained with reference to FIG.

FIG. 2 is an explanation of the case of switching from job A to job B, where job A shows the case where the data processing level is not specified, and job B shows the case where the data processing level is specified. The M tasks A and B correspond to the tasks A and B in FIG. 1, respectively, and each application program uses the database B in common. And RO, ER, CER
, MD, U.P.

WO is an application program that operates in the modes shown in (1) to (4) above. The control unit 1 also stops the data processing operations of the MD, UP, and WO application programs.

Therefore, when a business person performs an online task that does not specify a data processing level, the preceding task is prioritized and access is prohibited, as described below, according to the exclusive level indicated by 2 in Figure 2. Database B is under exclusive control, and each application program executes data processing while sharing database B. And at some point, for example.

In order to perform work B, the control unit 1' causes the application programs MD, UP, and WO to stop operating. Therefore, when carrying out work, only the application programs RO, BR, and CER that can process plugs can run on the database BK, and the application programs MD and UP that can rewrite data can only run on the database BK.
, WO does not operate, so even if the operator mistakenly inputs update data, database B will not be updated incorrectly. Of course, in this case as well, priority is given to advance access according to exclusive level 2 in FIG.

An embodiment of the present invention will be described based on FIG.

In the figure, 10 is a data processing unit, 11 is a database management control circuit, 12 is a management table, 13 is a business selection circuit, 2
0 is the database.

The data pace management control circuit 11 is an application program RO,
It manages the operations of ER, CER, M, D, UP, and WO, and in addition to performing exclusive control as shown in table Tl, it also performs control according to management items transmitted from management table 12.

The management table 12 selectively operates each of the above application programs according to the business content.

For example, management data such as table T2 is entered. Here, A and B indicate jobs A and B, and a circle mark indicates that the operation is possible, and an x mark indicates that the operation is stopped. Therefore, when performing work A, all application programs RO to WO can operate, and when performing work B, application programs RO, ER, and CER can operate, but MD, U
P, W”0 does not work.

The business selection circuit 15 selectively validates the management items entered in the management table 12.

For example, when activating job A, all application programs 2
When the system becomes operational and service B is enabled, application programs RO, ER, and CER operate, but MD,
UP and WO are in a stopped state. This task selection operation can also be selected by 5 hours when 5 hours is specified as in table T2 of FIG. Of course, if this time-selected work conversion is performed by the work selection circuit, table T2 may contain only either work items or 2-hour items.

Next, the operation of the present invention will be explained with reference to FIG.

When performing work MA in FIG. 3, work selection circuit 1
3 outputs selection signal A. As a result, management table 1
2 notifies the data pace management control circuit 11 that all application programs RO to WO are operable. Therefore, the database/U management control circuit 11 controls the application programs RO to WO using the exclusive fi+lI fdll based on the table T, and performs, for example, online business while reading and writing the database B.

Then, when the time is, oo, the business selection circuit 1
6 outputs selection signal B. As a result, management table 1
2 notifies the data pace management control circuit 11 that the application programs RO, BR, and CBR are operable. Therefore, the data pace management control circuit 11
In addition to exclusive control based on I, this management table 12
The operation of the application programs MD, UP, and WO is stopped based on the instruction to operate only the application programs RO, ER, and CBR transmitted from the application program RO, ER, and CBR.

Therefore, it is possible to perform batch-like tasks such as search-like data processing that outputs the contents of records and blocks in form. However, even if an operator accidentally inputs update data, all application programs can update the database 20 using data.

Since the base management control circuit 11 has stopped the operation, the database 20 will not be updated.

A second embodiment of the present invention will be explained based on FIG.

In FIG. 4, data B1. B2 with a plurality of processors 30.
40 is shared. Here, data B1 is inter-system shared data whose data processing level is specified to be searchable only by using the data processing level specifying function, and data B2 is the data processing level which is specified by using the data processing level specifying function. indicates that the data is shared between systems and is specified as update mode. In this case, inter-system shared data that does not use the data processing level regulation function is also included, that is, the update mode also includes the search mode.

Therefore, the application program E of the processor 30.

F is in update mode and processor 40. When the application program E' is in the search mode and F' is in the update mode, the database management control units 31 and 41 respectively control the operation based on the correspondence between each application program and the data Bi and B2. Therefore, application programs E' and F' cannot access data B1, but
Application programs E' and F can be accessed, and application programs Fi, F, and E' can access data B2.
, F' can be accessed entirely. Note that for the fourth factor, the management table and the like are not shown.

As described above, according to the present invention, it is possible to dynamically define the data processing level for specific data, and depending on the application, it is also possible to limit the application programs that can process the data. Further, data integrity/integrity, that is, a coupled exclusion level that allows application programs to run multiple times while guaranteeing data consistency, can be specified in the conventional manner. Moreover, if the data processing level is specified.

Not only can this be guaranteed, but it is also effective for shared data between systems on a computer complex system.

In addition, in the management table, in addition to defining the data processing level for each access mode of the application program as described above, search mode (RO, ER, etc.) is used.

It is also possible to define the data processing level 'ft by roughly dividing it into two types, such as IR) and update mode (MD, UP, WO). In this case, the update mode is RO, ER,
Includes CER.

〔Effect of the invention〕

According to the present invention, it is possible to extremely easily design a fail-safe system.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of data processing, FIG. 2 is a schematic explanatory diagram of the present invention, and FIG. 3 is a configuration diagram of an embodiment of the present invention. FIG. 4 shows the configuration of another embodiment of the present invention. In the figure, 10 is a data processing unit, 11 is a database management control circuit, 12 is a management table, 1°3 is a business selection circuit,
20 comes from data pace. Patent applicant Akira Yamatani, patent attorney representing Fujitsu Limited.

Claims (1)

[Claims] In a data processing device that performs different tasks composed of a plurality of application programs, the application programs are controlled by an access mode defined by exclusive control when accessing a data storage unit. , a database management unit that manages access operations of multiple application programs to the data storage unit; It has a management table that defines application programs that can be accessed according to the job, and a job selection section that controls the valid items in the management table depending on the job selection. A data processing level control method that controls so that only specific application programs can access the data storage unit depending on the business content.