JPH05274206A - Data managing device - Google Patents

Abstract

PURPOSE:To provide the data managing device which is convenient for users and enables exact management by managing data stored in plural storage devices. CONSTITUTION:A managing table is automatically generated by a managing table generating means (a) so as to unitarily manage managing information concerning data when storing the data in storage devices A. When the data in the storage devices are saved or erased, a managing table updating means (b) automatically updates the managing information in the managing table.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data management device for managing data (data files) stored in a storage device, and more particularly to a data management device for managing data stored in a plurality of storage devices.

[0002]

2. Description of the Related Art Various storage devices used in a computer system have a finite storage capacity, and when attempting to store ever-increasing data, before the data amount exceeds the storage capacity of the storage device. , Part of the data must be saved to another storage device.

In general, a storage device with a high access speed is expensive, and it is impossible to store all data in a storage device with a high access speed. Must be stored in a storage device with a high access speed, and data that is used less frequently must be saved in a storage device with a low access speed.

Conventionally, in these data management, the operator grasps all the data such as which data is used and how often, and which data is saved and stored in which storage medium. It was managing evacuation.

This is because the system itself only manages the physical management of data, so when generating, deleting or saving data, which data was generated, deleted or saved and when and who did it. And logical management such as where to save and which data is frequently used,
This is because the user himself had to manage the history such as which data was low.

[0006]

SUMMARY OF THE INVENTION In the above management method,
If there are multiple storage media to be saved, the amount of data is large, or multiple applications coexist and multiple data are mixed up, the state and location of each data cannot be managed. There was such a problem.

On the other hand, the error of the data erasing instruction is unavoidable even if the data is well managed,
In the unlikely event that an incorrect instruction is given, it may be erased even though it is originally necessary data. Conventionally, important data is backed up in another storage device in consideration of such an instruction error, so that there is a problem that the amount of stored data becomes enormous.

It is an object of the present invention to provide a data management system which is easy for a user to use and can perform accurate management by managing all of these data on the system side.

[0009]

The present invention has been made to solve the above problems, and a data management apparatus according to claim 1 is based on management information of data stored in a plurality of storage devices. A data management device that manages
Management table generating means a for generating a management table for centrally managing the management information of the data when the data is stored in the storage device, and management for updating the management information of the management table along with saving or deleting the data. Table updating means b is provided.

A data management apparatus according to a second aspect is based on the management information when the data management apparatus according to the first aspect is instructed to store data exceeding a storage capacity in one of the plurality of storage devices. It is characterized by including first control means c for specifying the data to be saved from the storage device and saving the specified data to another storage device.

According to a third aspect of the present invention, there is provided a data management apparatus, wherein when the data management apparatus according to the first aspect is instructed to delete the data in one of the plurality of storage devices, the data management apparatus deletes the data after a predetermined time has elapsed. The second control means d is provided.

[0012]

According to the data management apparatus of the first aspect, in a computer system having a plurality of storage devices,
When storing data, a management table that centrally manages management information such as which storage device the data was stored in is generated, and management data is saved when the data is saved to another storage device or erased. The history of is updated automatically. Therefore, by referring to the management data, the current data state, whereabouts, etc. can be known at a glance.

According to the data management device of claim 2,
When instructed to store data that exceeds the storable capacity,
The first control means gives a save instruction based on the data management information. For example, the data having the least frequently used history is specified and the data is saved in a storage device with a slow access speed.

According to the data management device of claim 3,
When the deletion of data is instructed, the second control means does not immediately delete the data, but deletes the data only when there is no change in the instruction even after a certain period of time.

[0015]

An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 4 is a block diagram showing the configuration of the data management apparatus of this embodiment. The CPU 10 manages a data file (data stored on a disk is called a data file) based on a management table. That is, with respect to the data existing in the storage device, management data such as the name of the data, the date of creation, the storage device (storage medium), the usage history of the data (the number of accesses), etc. are created and stored in the management table storage means 20. It has the function of storing data.

The mass storage devices 30 and 40 are optical disks,
It is composed of a magneto-optical disk or the like, and saves and stores the data generated on the computer system. The mass storage devices 30 and 40 can store a large amount of data, but the access speed is relatively slow.

The storage device 50 is composed of a hard disk or the like and stores data generated on the computer system. The storage device 50 temporarily stores all generated data, and then saves the data in the storage device 30 or the storage device 40 as needed. The storage device 50 has a faster access speed but a smaller storage capacity than the mass storage devices 30 and 40.

FIG. 2 shows the description contents of the management table in the management table storage means 20.
Shows an example of management items. 1 is the data name, 2
Is the author name of the data, 3 is the date of creation of the data, 4 is the storage medium (storage device name) of the data, 5 is the deletion attribute, 6 is the last access indicating the date when the data was last accessed,
Reference numeral 7 indicates the number of accesses using the data. In addition to these management items, arbitrary management items can be added.

The data name 1 and the data creator name 2 are entered by the creator or the like when creating the data, or are automatically given by the file management management function. Date created 3
The management information up to the access number 7 is automatically given by the file management function of the CPU 10. Of the management information, the contents of the storage medium 4 and the deletion attribute 5 are automatically updated when the data is saved in another storage device or deleted after the data is created. Further, the contents of the final access 6 and the access number 7 are automatically updated every time the data is accessed.

Next, the function of the file management function of this embodiment will be described with reference to FIGS. Generation of Management Data First, data to be stored is created by the processing of the CPU 10, or data is input from another system or the like, and these data are temporarily stored in the storage device 50.

At this time, the operator inputs data such as data name 1 and creator name 2 as management information about the data, while managing data such as data creation date 3, storage device name 4 and the like. Information data is automatically generated by the CPU 10, a management table is created based on these data, and stored in the management table storage means 20. The contents of the management table storage means can be confirmed at any time by the instruction of the operator.

Deletion of Data When deletion of stored data is instructed, the column of the deletion attribute 5 on the management table is changed to deletion for the instructed data by the instruction of the CPU 10. Specifically, a flag indicating deletion is set in the deletion attribute 5 column.

However, in consideration of the case where the deletion instruction is erroneous, the data whose deletion attribute is deleted is not immediately deleted, and the data is retained for an arbitrarily set predetermined time. Data is deleted when a predetermined time has elapsed. By doing so, it becomes possible to recover the data within a certain period of time even when an instruction to delete the data by mistake is given.

The data instructed to be deleted may be held in the storage device in which the data was stored for a certain period of time. However, if the storage device is a storage device having a high access speed, the access time is temporarily changed. The data may be held for a certain time after the data is avoided by the slow storage device. By performing the latter process, other frequently used data can be stored in the storage device with a high access speed.
An expensive storage device can be effectively used, and the processing speed of the entire system can be improved.

Saving / Restoring Data When the amount of stored data increases, it is necessary to save the data to the storage device 30 or storage device 40, which is another storage device, before the storage capacity of the storage device 50 is exceeded. .. In this case, data is automatically transferred from the storage device 50 to the storage device 30 or the storage device 4 by the file management function of the CPU 10.
The contents of the storage medium column 4 are updated in the management table in the management table storage means 20 while being saved to 0.

At this time, the operator can arbitrarily instruct which data is to be saved by referring to the management table, but the CPU 10 refers to the number of accesses in the management table and selects the data with a small number of accesses. Data can be avoided by giving priority.

On the other hand, when the data stored in the storage device 30 or the storage device 40 is restored to the storage device 10, the storage medium column 3 of the management table in the management table storage device 20 is also instructed by the CPU 10 as in the case of saving the data. Will be updated.

As described above, when a data file is manipulated or changed, the data file is manipulated through the management table. Therefore, data and a plurality of storage media in which the data is stored are used by using the management table. It is possible to manage centrally. Therefore, it is possible to easily know the state and whereabouts of the data only by referring to the management table.

[0029]

As described above, according to the present invention, since the system side centrally manages all data files by using the management table, it is not necessary for the operator to manage each data, and the data is saved. Even when there are a plurality of storage devices, the location of the data can be easily known by referring to the management table. Further, it is also possible to perform a search for each item by referring to the management table.

Further, since the file management function is independent of other applications, it is easy to install and all data files generated even when a plurality of applications coexist are managed by the management table. Integrated file management that can be selected.

Further, the data to be saved in another recording medium can be specified automatically based on the history of the management information, and the data can be retained for a certain time even if the data is erroneously deleted. In addition, the data recovery can be easily performed, and in addition, the access speed is fast according to the frequency of use of the data, an expensive storage medium and a large-capacity and inexpensive storage medium can be effectively used, and so on.

[Brief description of drawings]

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

FIG. 2 is an explanatory diagram showing a data management table according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing the operation of the present embodiment.

FIG. 4 is an explanatory diagram showing a configuration of an embodiment of the present invention.

FIG. 5 is a flowchart showing the operation of the present embodiment.

[Explanation of symbols]

 10 CPU 20 Management Table Storage Device 30 Mass Storage Device 40 Mass Storage Device 50 Storage Device

Claims (3)

[Claims] 1. A data management device that manages data stored in a plurality of storage devices based on management information, and a management table that centrally manages data management information when storing the data in the storage devices. Management table generating means for generating, and management table updating means for updating the management information of the management table in accordance with saving or deleting of data,
A data management device comprising: 2. When the storage of data exceeding the storage capacity is instructed to one of the plurality of storage devices, the data to be saved from the storage device is specified based on the management information, and
The data management apparatus according to claim 1, further comprising a first control unit that saves the specified data to another storage device. 3. A second control means for executing data deletion after a lapse of a predetermined time when data deletion is instructed to one of the plurality of storage devices. The described data management device.