JPH03125240A - File control system for electronic computer system - Google Patents

Abstract

PURPOSE:To improve the productivity for production of software of an application program by having a logical access to the data with no dependence on the physical characteristic and the attribute of an external storage and to attain an access to the data regardless of the processing form of software of the application program. CONSTITUTION:A virtual storage 113 is provided with a file control software means 111 which includes the means to carry out the control for the resources, the maintenance, the data access, the security, the hierarchical storage, the operation, etc. Then a logical access is given to the data via the application program software of a certain type even if a user program or the application program softwares 101-104 may run in any dimensional process form. At the same time, the data access is controlled in response to the process forms of the softwares 101-104. Then the producitivity is improved for production of the application program software.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is applied to a computer system that manages files or data stored on an external storage device and read and written. The present invention relates to computer system control programs, computer system software, and more particularly to files accessed by application program software (meaningful collections of logical data, files, datasets, or database files). resource management, maintenance management, security management, +7-tei management, hierarchical memory management, etc.)
The present invention relates to a control program or operating system program software having various functions such as data access management.

〔overview〕

The present invention is a file management method for a computer system connected to an external storage device, which logically accesses data without depending on the physical characteristics or attributes of the external storage device, and which processes application programs in any form. By enabling data to be accessed even by software, the productivity of creating application program software that accesses data and files is improved.

[Conventional technology]

Traditionally, file management for this type of file and data access involves how application program software is stored and stored on an external storage device, how the data to be read and written is organized, the storage medium, the physical characteristics of the external storage device, attributes, etc. I accessed files and data with this in mind.

Furthermore, it does not have functions for data maintenance, security, and other operational management, and the application program software creates these functions while being aware of the characteristics of the external storage device, and performs these functions on behalf of the application program software.

[Problem that the invention seeks to solve]

The conventional file management described above is as follows: (1) Application program software that accesses data and files has to know on what media and on what device the data and files are stored, whether they exist, and how to access them. It is necessary to be aware of the physical properties and attributes that are different from data and files, such as whether it is a file or not.

(2) It is necessary to be aware of which type of processing mode, such as an interactive processing mode, a batch processing mode, or a real-time processing mode, the application program software that accesses data and files runs.

(3) For this reason, it is necessary to incorporate or prepare a physical awareness part (logic and operations that should originally be handled by file management software) in addition to the logical awareness of data and files into the application program software itself.

(4) Even though the same data and files are accessed, it is necessary to prepare a plurality of application program software separately for each medium, device, and processing type.

(5) Application program software that accesses data and files is required to perform complex processing and operations related to data preservation, data security, disaster recovery, operational management, etc., which are originally the responsibility of file management software. need to be created.

(6) Application program software for accessing data and files requires a long time to create a program, even if it is a simple program that is disposable.

There are drawbacks such as.

The present invention aims to eliminate such drawbacks and provides a file management system that functions in an integrated manner as control program software.

[Means for solving problems]

The present invention provides a file management method for a computer system equipped with an external storage device, in which a virtual storage device is set,
The present invention is characterized by comprising file management software means including means for respectively performing resource, maintenance, data access, security, hierarchical storage, operation, and other management with respect to the virtual storage device.

[Effect]

An interactive processing format in which a user program or application program software accesses data logically without depending on the data organization method, storage method, or physical characteristics or attributes of the external storage device used to read or write the storage medium.
No matter which dimension of processing is run, such as batch processing or real-time processing, data is accessed by either type of application program software. In addition, depending on the processing form of the application program software, securing and recognizing resources for data access (data storage media, data, file areas, external storage devices for reading and writing media, etc.), asynchronous access control of data and files, and synchronous access. Data access management is based on control, security management, maintenance management including failure countermeasures, and hierarchical storage management.

This makes it possible to improve the productivity of creating application program software that accesses data and files.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention.

In the embodiment of the present invention, a computer system 112 is connected to an external storage device 119, the external storage device 119 is provided with a virtual storage device 113, and the computer system 112 has the following functions:
Conversation processing mode application program software (API, AP2, -) 101, remote job input/output car batch processing mode application program software (A
2B) 102 - an application program area 109 including batch processing type application program software (AP4., ...) 103 and real-time processing type application program software (AP5, APn) 104, and conversation processing control software (TSS); 105, Remote job input/output car batch processing control software (RJE) 106, Batch processing control software (BATCH) 107,
and an operating system area 110 including real-time processing control software 108, resource management means 1111, maintenance management means 1112, data access management means 1113, security management means 1114, hierarchical storage management means 1115, operation management means 1116, and other File management software means 111 including management means 1117.

The virtual storage device 113 also includes the magnetic disk device 11
4, the disk cache unit 115, the paging disk unit 116, and the disk cache unit 1
17 and a catalog information area 118, and the external storage device 119 includes a magnetic disk device 120, a disk cache device 121, a magnetic tape device 122, a line device 123, a floppy disk device 124, and an optical disk device 125. and a mass storage device 126.

The resource management means 1111 performs conversational processing, real-time processing,
- Define and recognize file data areas, media, and device resources necessary for accessing data for multiple jobs, command programs, and application program software that operate simultaneously in multiple processing formats such as batch processing, and allow multiple users to access data at the same time. , job, command program, application program software, any specific user, job, command program,
Control is exclusively assigned only to application program software.

The maintenance management means 1112 includes asynchronous access that allows multiple jobs, command programs, and application program software to access data, and exclusively allows data access to only one specific job, command program, and application program software. , a function that prevents other data accesses according to the type of access (data reading, data writing, data updating, etc.) to ensure data integrity, and data caused by intentional, accidental, or unavoidable events. A journal function that manages data update history in order to deal with data corruption and loss; a backup recovery function that automatically restores data and files to the state before the occurrence of these unexpected events when a data corruption or loss event occurs; It also has a save-load function that saves and restores the entire file data, and a generation management function that manages this save-load function in chronological order.

The data access management means 1113 has a logical input/output function, a database input/output function, a file data It has a storage medium for database data, a medium depending on the device, and a physical input/output function for accessing the device.

This physical input/output function is also called a device driver, and is prepared for each device, such as a magnetic tape device driver for the magnetic tape device 122, a line device driver for the communication line device 123, and a paging disk device driver for the paging disk device 116. be done.

When accessing data, the security management means 1114 controls the types (data creation, data reference, data updates, expansions, etc.) and excludes access from unauthorized users, job command programs, and application program software.

Hierarchical storage management means 1115 manages physical media and devices on which data and files are stored. Unless otherwise specified, data and files are recognized from the application program software by viewing only logical data and logical attributes. However, this hierarchical storage management means 11
15, application program software cannot see at all what kind of media data and files are stored on, what devices they exist on, and how they are physically output, but there is no need to be aware of this. do not have.

In addition, in conjunction with the data access management means 1113, it statically or dynamically manages the relationship between physical media and devices on which logical data and files are stored, and controls the storage format, storage format, space capacity, access speed, etc. It absorbs physical properties and characteristics, virtualizes them, and performs control to ensure logical access to data and files.

The operation management means 1116 recognizes files, data, or databases using logical names, and uses these logical names and physical names (medium, device, space, etc.) and operational conditions (security, amount of usage, number of accesses, time, etc.). Provides a centrally managed file catalog function, database catalog function, and function to manage users who use resources.

The virtual storage device 113 is a storage device that has a storage capacity that can temporarily store all or part of data such as Finope data or a database, and can be accessed directly. For example, RAM.

Storage devices with relatively high access speeds, such as semiconductor magnetic storage devices and high-speed large-capacity magnetic disk devices, are used.

In the configuration example of this embodiment shown in FIG. 1, the application program software in each dimension such as eight application programs Pi, AP2, .
It is a system that simultaneously operates in multiple processing formats such as real-time processing format, and is control program software that belongs to operating system software.

In FIG. 1, ■ indicates that all application program software accesses data, and ■ indicates that data is accessed through the virtual storage device 113.
Indicates that logical access to the file is guaranteed. Also ■
indicates that data and files are sent and received between the external storage device 119 and the virtual storage device 113, and ■ indicates a conventional method that does not necessarily guarantee 100% logical access to data and files; in this case, the file This indicates that the management directly accesses the external storage device 119.

Figure 2 shows the phase structure (Tree 5t
-structure) is a diagram showing a logical name set 224.

An identification name consisting of alphanumeric characters that starts with an alphabetic character is called a simple identification name, and a logical name is a fully qualified (per iod) identification name that is a combination of simple identification names. In addition, each simple identifier of the phase structure is designated as a node or directory.
directory'). In this second figure, A1B5
C, D, X, Y, Z, GRP, GRP 1(7)/-
FILEI, FILE2, FILE3, FILE
4, FILE5, VOLl, VOL2, VOLGRP
1, PUBLrCSUSERI, USER2, USER
3 objects indicate simple names, A, B, C, FI
LEI, GRP, GRPi, USERI, X, Y, Z,
VOLI and the like indicate fully modified salts.

Also, * is called root and indicates the highest node, the preceding node is called the upper node, and the succeeding node is called the lower node. There is a node called an object at the lowest level, which includes a Finope volume, a database, a user, and so on.

File names, database names, volume names, user names, etc. are in the phase structure A, FILEl, A, B.

C, FILE2, X, Y, Z, VOLISGRP.

It is expressed by logical names such as GRPI and USERI, and these logical names are used when using data and files.

In addition, a set of logical names consisting of nodes and objects (tree 5structured naming
5pace) is called a catalog, and this includes a 7file catalog that manages files.
catalog), database catalog (data base catalog) that manages the database
), volume catalog (vo
lume catalog), and a user management catalog (user catalog) for managing users.

FIG. 3 is a diagram showing a file catalog 312 according to the embodiment of the present invention. In the figure, * is the root, A, B, C.

D indicates a node, FILEI, and 2.3 indicate a file. This file catalog 312 manages various attribute information of files.

The medium name is the volume name (volume identification name: volume 5erial n) that stores this file and data.
um-ber), volume group name (volume group identification name: volume group name
), manage the amount of space.

The device name indicates the device that loads and reads/writes the volume containing this file.

File names are logical names, e.g. A, B, C, FI
It manages the real name (the name recorded on the medium; in this case, the logical name and real name are the same) and aliases of files with LEI.

Generation salt is the generation file name if the file is a generation management file.
, if it is an evacuation recovery management file, the evacuation recovery file name (
copyfile name).

Access control list
1ist) manages file integrity information.

Other operational management information manages the file creation date, access date, number of accesses, etc.

FIG. 4 is a diagram showing a polycomb catalog 416 according to an embodiment of the present invention. In the diagram, * mark is root, VOLI, 2.3 is volume, w, x, y, z are nodes, VOLGRP 1
, PUBL IC indicates a volume group. The volume catalog manages volumes such as magnetic disk polyμm and magnetic tape volumes that store data and files, volume groups that collectively manage multiple volumes, terminal devices, and the like.

The media name is the volume name that stores the file and data (volume identification name: volume 5erial nun
+ber), the real name of the volume group name (volume group identification name: volume gpoup name) (the name recorded on the medium, and generally the logical name and real name are the same), or their aliases (alias).
), and also manage the attributes (resident, private, public, etc.) and amount of space of volumes and volume groups.

If the copy salt is an evacuation and recovery management volume, the generation file evacuation and recovery volume name (copy volume
manage me).

Access control list (access control 1
ist) manages volume integrity information.

Other operational management information includes the volume creation date,
Access dates, access counts, etc. are managed.

FIG. 5 is a diagram showing a user catalog of the user management system 514 in the embodiment of the present invention.

User management registers users who use the system, sets the scope of use of the system for each user, and prevents use outside of authority or unauthorized use to maintain system operation and make it more effective. It is intended to be utilized.

The user management system 514 has a phase structure (tree 5 true) consisting of users (users) and groups (gr'oup).
A group is an element that constitutes a management system, for example, a department in a company organization,
Corresponds to a section or section.

A user is an element that constitutes a group,
For example, it corresponds to a club member, section staff, or person in charge. G1, G2,
G3, G4, G5 are groups, UISU2, U3, U4
, U5, U6, U7, and U8 correspond to the users. Groups G4 and G5 hierarchically belong to group G2;
3 belongs to G1.

Also, this figure shows that user U1 belongs to group Gl, U2 belongs to G2, U3 belongs to G3, U4, U
6, U7 belongs to G4, and U5 and U8 belong to G5.

Next, data access operations using the file management method according to the embodiment of the present invention will be described. FIG. 6 is an overall diagram showing the operation of application program software and file management when using data and file resources;
Figure 7 (a), (b), (C), (company), (e) are the 6th
It is a detailed diagram showing the contents of catalog information in the figure.

The application program software APn is the file G1. The operation when trying to use Ull and FILEI is as follows: File G1. A declaration to use Ull and FILEl is made to the file management software 111, and then the file management software 111
refers to the file catalog 312 and verifies the existence of the file and the validity of file usage (■).

In order to prevent system damage or data loss due to intentional or mistaken use of systems and resources (files, volumes, devices, etc.), access rights are established for each user of resources.
right) to manage and protect resource usage.

The access rights include ALTER, which allows all access to resources such as update, addition, extension, deletion, and renaming; UPDATE, which allows updates, additions, extensions, deletions, and references; READ, which allows updates, additions, extensions, deletions, and references; and EXEC, which allows references. N0NE - I cannot access the switch.

An access right list (access control 1) is information that records access rights to users and resources.
ist) is managed in a catalog that manages resources.

Access to resources is checked for each resource in a catalog such as the file catalog 312, volume catalog 416, or database catalog, and for each user, and if the rights are valid, access is possible. Unauthorized users are denied access to resources.

According to the information in the file catalog 312 shown in FIG. 7, files G1. Ull and FILEI are stored in the large-capacity storage volume VOOOOI, as shown in Figure (a) D, and has a file area of 100.
OOOI has a public attribute (PUBLIC: a volume that can be used by all users).

In the access rights list, the file owner (owner: the user who created the file and has all rights to the file, such as updating and deleting) is the user Ull who belongs to group G1, and the user Ull who belongs to group G2, Ull, who belongs to G2. All users except the user U14 to whom it belongs can read (READ), and all other users cannot access.

(DACC=NONε) The system determines whether the user of the application program software APn is Gl, Ull, G3. Is the access request valid for a user belonging to group G3 other than U14 (G1.Ull allows all access; G3.user belonging to group G3 other than U14 allows reference access) Verify. If it is valid, the system allows the user and APn to use the files in the mass storage volume VQO (11). If it is not valid, the request is rejected.

■ and ■ in Figure 6 indicate A who is allowed to use the file.
Pn is 7. Il G 1. Ull, FILE
1 data access is being performed. Data access is not performed directly to the mass storage device 126 but to the virtual storage device 113 via system data access management.

Therefore, the hierarchical storage management of the system moves all or part of the file from the mass storage polynym VOOI) 01 to the virtual storage device 113 (■).

Furthermore, when APn declares the end of file use through the route (■) shown in Figure 6, the system writes the file in the virtual storage device 113 back to the mass storage volume (■), and then the hierarchical storage management described above writes the file back to the mass storage volume. Update the relevant operational information of the file catalog 312 and polyneme catalog 416 related to the file to bring it to the latest state (■, ■)
.

〔Effect of the invention〕

As explained above, according to the present invention, when creating application program software that accesses data and files, the data and files can be accessed without being aware of the physical properties and attributes of the media, devices, space capacity, etc. on which the data and files are stored. , you only need to be aware of the logicality of the file, and when accessing the same data or file,
Data and files can be accessed using a single application program software without having to prepare application program software for each medium or device in which they are stored. In addition, when using operating system software that centrally manages multiple processing formats, it is possible to use one application program software that accesses the same data and files as part of its functions, instead of having to prepare multiple application program software for each processing format. It is possible to run in each dimension as is, which has the effect of improving the productivity of creating application program software that accesses data and files.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a diagram showing a phase structure logical name set in the embodiment of the present invention. FIG. 3 is a diagram showing a file catalog according to an embodiment of the present invention. FIG. 4 is a diagram showing a volume catalog according to an embodiment of the present invention. FIG. 5 is a diagram showing a user catalog of the user management system in the embodiment of the present invention. FIG. 6 is a diagram showing the operation of application program software and file management when using data and file resources in the embodiment of the present invention. FIGS. 7(a), Q:1), (C), (6), and (e) are diagrams showing details of catalog information according to the embodiment of the present invention. 101... Conversation processing type application program software, 102... Remote job input/output car batch processing type application program software, 103
...-Batch processing type application program software, 104... Real-time processing type application program software, 105... Conversation processing control software, 106... Remote job input/output car batch processing control software, 107...- Batch processing control software, 108... Real-time processing control software, 109... Application program area, 110... Operating system area, 111... File management software means, 112... Computer system, 113. ...Virtual storage device, 114.120.614...Magnetic disk device, 115.117.121...Disk cache device, 116...Paging disk device, 11
8... Catalog information area, 119... External storage device,
122... Magnetic tape device, 123... Line device,
124... Floppy disk device, 125... Optical disk device, 126... Mass storage device, 224...
... Phase structure logical name set, 312 ... File catalog, 416 ... Volume catalog, 514 ... User management system, 612 ... File G on virtual storage device
1, Ull, FILEI, 616...User catalog, 709...Magnetic tape volume.

Claims (1)

[Claims] 1. In a file management method for a computer system equipped with an external storage device, a virtual storage device is set, and for this virtual storage device, resources, maintenance, data access, security, hierarchical storage, 1. A file management method for a computer system, characterized by comprising file management software means including means for performing operation and other management, respectively.