JPS62282341A - Data managing system - Google Patents

Abstract

PURPOSE:To relieve the load of a user by using a data set management means so as to allocate or access a data set through only the designation of a data set name and a group identifier. CONSTITUTION:The titled system is provided with a data set information storage means 2 storing the location of a data set and the attribute of the data set, a group management means classifying the data set into a group and managing it, and a data set accessing means 4 accessing the dataset depending on the data set name and the group identifier stored by the data set information storage means 2. The data set information storage means 2 uses the management table to store the location of the data set and the attribute of the data set, the group management means 3 uses a group identifier to classify the data set into a group and manages it and the data set accessing means 4 uses the dataset name and the group identifier in the management table to access the data set.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a data management method, and particularly to a data management method for managing datasets in a complex distributed data processing system.

[Conventional technology]

Conventionally, in this type of data management method, when creating a dataset and using a dataset, the user directly inputs the dataset name to identify the dataset and the storage media device such as the unit number of the magnetic disk device. I had it specified.

[Problem that the invention seeks to solve]

The conventional data management method described above requires the user (dataset creator) to specify the physical storage medium device of the dataset when creating the dataset and declaring the use of the dataset (opening). The disadvantage is that as networks become networked and decentralized, the burden on users increases.

In addition, if you relocate the data set (move the data set to another external storage location, move it to the external storage device of another central processing unit, etc.), you can partially modify the user program (use the data set). The disadvantage is that it requires modification of the declaration.

In view of the above-mentioned points, it is an object of the present invention to eliminate the need to specify a data set storage medium device when creating and using a data set, and to provide a place where a user program declares the use of a data set when relocating a data set. The objective is to provide a data management method that does not require modification.

[Means for solving problems]

The data management method of the present invention is a data management method for inputting and outputting data between an external storage device and a central processing unit in a complex distributed data processing system.
); a group management means for classifying and managing data sets) into groups; and dataset names and group identifiers stored in the dataset information storage means. and dataset access means for accessing the dataset by.

[Effect]

In the data management method of the present invention, the dataset information storage means stores the locations of the datasets and the attributes of the datasets using a management table, the group management means classifies and manages the datasets into groups based on group identifiers, and Data set access means accesses the data set using the data set name and group identifier on the management table.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a diagram showing a module configuration of an embodiment of the data management system of the present invention. The data set management means 1 of the data management method of this embodiment is composed of a data set information storage means 2 and a group management means 3, which mainly function when creating a data set, and a data set access means 4, which functions when using a data set. has been done.

Referring to FIG. 2, in the data management method of this embodiment, the management table 5 created on the main memory and searched includes the data set name 51 and the data set name 51 when the user creates or uses the data set. A group identifier 52, such as a host computer number, which specifies the storage location of a data set in order to classify it into a group, a data set location 53 for each central processing unit, which is also called a physical host computer number, and a data set location 53, which is also called a physical host computer number. Attribute 5 indicating the device name 54 of the existing external storage device and the data set instruction method
5.

For example, there are two central processing units in a group classified by the group identifier 52 of host computer number HO3TO1, and the data set location 53 for each central processing unit is classified into PH03T01 and PH03TO2. DK# belonging to PH03TO1
The information unit of a sequential data set called DATA existing in a magnetic disk device called O is stored on the management table 5 in the format shown in FIG.

FIG. 3 shows an example in which each piece of information is stored in the management table 5 shown in FIG. 2, in correspondence with a group of external storage devices in which data sets are stored.

Referring to FIG. 4, in the data management method of this embodiment, the process of creating a data set and allocating it to an external storage device includes a step 11 of confirming the number of existing locations;
Step 12 for determining the number of locations and presence location designation; steps 13 and 14 for determining device designation; area securing step 15; and device 1! ! The process includes a step 16 for acquiring and securing an area, a step 17 for acquiring a location and securing an area, and a step 18 for acquiring a location and device and maintaining the area 61.

Referring to FIG. 5, in the data management system of this embodiment, the processing when a user attempts to use a dataset includes a dataset search step 21, a dataset non-judgment step 22, and a dataset existence location step 22. The process consists of a II setting step 23, a data set oven abnormal termination step 24, another system connection step 25, and a data set open normal termination step 26.

Next, the operation of the data management system of this embodiment configured as described above will be explained.

First, the operation when a user creates a data set and allocates it to an external storage device will be explained.

At this time, the user uses the data set name 51 and the group identifier 52.
It is sufficient to specify the location 53, the device name 54 (it is also possible to specify only the type of device), or both, if necessary.

Upon receiving such a designation from the user, the number of existing locations within the group classified by the group identifier 52 is confirmed (step 11).

Subsequently, it is determined whether the number of locations confirmed in step 11 is one or whether the location 53 has been designated by the user (step 12).

If the existence location 53 is limited by this determination, the external storage device is installed by the user! It is determined whether or not the name 54 (it is also possible to specify only the device type) is specified (step 13).
), if specified, the specified external storage device is acquired and space on that device is reserved for dataset allocation (step 15); if not specified, the attributes of the dataset are 55 is acquired and space on that device is reserved for data set allocation (step 16).

If the location 53 is not limited as determined in step 12, it is determined whether the user specifies the type of external storage device (step 14), and if there is a designation, the location 53 is The specified external storage device is acquired and space on that device is reserved for data set allocation (step 17). If there is no specification, an external storage device that does not conflict with the attribute 55 of the dataset in any existing location is acquired, and the area on that device is reserved for the allocation of the dataset (
Step 18).

As described above, when the group management means 3 secures an area and allocates the data set, the data set information storage means 2 stores the data set name 51, the group identifier 52, the location 53, and the device name 54 of the external storage device. and the attributes 55 of the data set are stored on the management table 5 and stored thereafter.

Note that when data sets are relocated, the data set information storage means 2 and the group management means 3 change the location 53 of the data set without changing the group identifier 52 corresponding to the data set name 51 on the management table 5. or the device name 54 or both are changed.

Next, the operation when a user tries to use a dataset will be explained.

The dataset access means 4 searches the management table 5 using the dataset name 51 and group identifier 52 specified by the user at the time of use declaration (opening) (step 2).
1).

Through this search, it is determined whether the specified data set name 51 managed by the specified group identifier 52 exists on the management table 5 (step 22).
.

If dataset name 51 is not found in this judgment,
Data set open processing ends abnormally.

(Step 24).

If the dataset name 51 is found in step 22, the location 5 corresponding to the dataset name 51 is found.
3, it is determined whether or not the external storage device in which the data set exists belongs to another system (another central processing unit) (step 23). In this determination, the data set exists in the external storage device of another system. If so, the system is connected (step 25), and the data set open process ends normally (step 26). In addition, if the dataset exists in the external storage device of the own system as determined in step 23, the data set open processing ends normally in the own system (step 2
6).

Note that in the data management method of this embodiment, the group identifier 52
If not specified, all external storage devices in the complex distributed data processing system become one-dimensional storage structures as extensions of main storage.

〔Effect of the invention〕

As explained above, the present invention provides a data set management means that allows the user to specify only the data set name and group identifier when allocating a data set (when creating a data set, relocating a data set, etc.) and when using a data set. By being able to allocate and access datasets implicitly, the user's burden can be reduced.

In addition, even if the data set is relocated, the group identifier specified by the user during use does not need to be changed.
This has the advantage that the user program can be used without any modification even after data sets are relocated.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the module configuration of an embodiment of the present invention, Fig. 2 is a diagram showing a management table used in the data management method shown in Fig. 1, and Fig. 3 is a diagram showing the management table used in the data management method shown in Fig. 2. Figure 4 is a flowchart showing the processing at the time of data set allocation in the data management method shown in Figure 1. Figure 5 is a diagram illustrating the management table in more detail. 12 is a flowchart illustrating processing when using a dataset. In the figure, 1... Data set management means, 2... Data set information storage means, 3... Group management means, 4... Data set access means, 5... Management table.

Claims (1)

[Claims] In a data management method for inputting and outputting data between an external storage device and a central processing unit within a complex distributed data processing system, data that stores the location of a dataset and attributes of the dataset a set information storage means, a group management means for classifying and managing data sets into groups, a data set access means for accessing the data set using the data set name and group identifier stored in the data set information storage means; A data management method characterized by including.