JPH0439749A - Editing data store control method for data processing system - Google Patents

Abstract

PURPOSE:To execute the protection processing of data by transferring a small quantity of data being in the course of editing processing on a main storage to a volatile memory of a small capacity at a high speed, and storing it in an external storage device of a large capacity independently from the editing processing, based on an arbitrary trigger. CONSTITUTION:An auxiliary storage means 4 consisting of a volatile memory is provided, and by using a store program operated asynchronously to an editing program, editing data with header information registered in the auxiliary storage means 4 is restored in a protective file of an external storage device 6, and also, based on the editing data with header information registered in the protective file, the data stored in the external storage device 6 is updated. In such a way, even in an unforeseen state such as a service interruption, etc., in the course of editing work, at least, for instance, data until five minutes before is stored in the external storage device, and the dissipation of all editing data can be prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a data protection and recovery method for a data processing system, and in particular, a method for protecting data in response to unexpected failures such as power outages, The present invention relates to an edited data storage control method for a data processing system suitable for efficiently automatically starting the system after recovery from a failure.

[Conventional technology]

Currently, various types of data are processed using systems using computers. These data are
The data is processed in the main memory of the computer and the contents of the data are changed. After the content has been changed, these data are stored from the main memory section to an external storage device for storage. In this way, the latest data is always stored in the external storage device. When the user uses these data, the user can retrieve the latest data from the external storage device into the main storage section and perform desired operations based on this data.

However, if the supply of external power is stopped during data processing, for example due to a power outage, the data being processed in the main memory will disappear without being registered in the external storage device. Therefore, the user has to retrieve the conventional data from the external storage device again and perform the same processing from the beginning.

In order to prepare for such unforeseen situations such as power outages, conventional technology involves installing a large amount of non-volatile memory in a computer system, and transferring and storing data being processed in this non-volatile memory during data processing operations. There are some methods that protect data by doing so.

Alternatively, data is protected by transferring and storing data being processed in a storage device such as a large-capacity disk, such as a hard disk.

When restoring the system, some systems use data stored in these nonvolatile memories, disks, and the like.

For example, ``Japanese Word Processor RIPORT 5300 Series'' published by Ricoh Co., Ltd. in 1988.
As described in "Usage Manual, Function Edition 1", pp. 226, there is a device that stores a document being edited and proofread in a temporary registration area of a fixed disk based on a predetermined key operation.

[Problem to be solved by the invention]

Conventionally, in order to protect the data being processed in response to unforeseen circumstances, a large amount of non-volatile memory has been installed, and the data being processed has been transferred and stored in this memory. The data being processed was transferred and stored on the disk to protect the data.

A method using a large amount of non-volatile memory allows high-speed processing, and the time required for data protection processing does not reduce the system processing capacity.

However, nonvolatile memory is expensive, making it unsuitable for low-cost systems.

Furthermore, although methods using large-capacity disks do not use expensive non-volatile memory, it takes time to write data to the disks, reducing the processing performance of the system.

An object of the present invention is to solve the problems of the prior art, to transfer a small amount of data that is being edited in the main memory to the volatile memory of the walking capacity at high speed, and to transfer the data transferred to the volatile memory at high speed. By storing data in a large-capacity external storage device based on an arbitrary trigger and independent of editing processing, data can be protected while reducing costs and maintaining system processing speed. An object of the present invention is to provide a method for controlling storage of edited data in a data processing system.

[Means to solve the problem]

In order to achieve the above object, the editing data storage control method of the data processing system of the present invention includes (1) reading data stored in an external storage device into the main memory, and displaying the data read out in the main memory on a display device. The data displayed on the display device is edited using an editing program, the edited edited data is transferred from the main memory to an external storage device using the editing program, and the data stored in the external storage device is In the edited data storage control method of a data processing system that changes to edited data, the data processing system has an auxiliary storage means consisting of a volatile memory, and uses an editing program to store data in the main memory each time the data is edited. Adding header information to the edited data edited in the editing process, consisting of a program identifier identifying the editing program and a page number indicating the storage location of the edited data, and
The step of registering the edited data with header information to which the header information has been added is registered in the auxiliary storage means from the main memory, and the edited data with header information registered in the auxiliary storage means using a storage program that operates asynchronously with the editing program. A step of updating the data stored in the external storage device based on the edited data with header information registered in the protected file of the external storage device and registered in the protected file, asynchronously with the operation of the editing program; When the processing system restarts after the power is turned off during data editing processing, the editing data with header information registered in the protection file of the external storage device is detected, and the editing program is identified by the program identifier of the detected editing data with header information. , the started editing program reads the data stored in the external storage device into the main memory, and displays on the display device the data corresponding to the page number of the edited data with header information registered in the protected file. It is characterized by including.

(2) In the edited data storage control method for a data processing system described in (1) above, the auxiliary storage device is backed up by a battery, and the auxiliary storage device is If edited data with header information that is registered in the storage device but not registered in the protected file of the external storage device is detected, the storage program is started and the detected edited data with header information is transferred from the auxiliary storage device to the external storage. The editing program is characterized in that the editing program is started based on the editing data with header information registered in the protection file of the device and stored in the external storage device.

[Function] In the present invention, a small capacity volatile memory is used as an auxiliary storage device.

When data in the main storage device is edited by an editing program based on a data editing instruction from a user, an editing program ID or the like is assigned to the edited data each time one editing process is completed. Save to auxiliary storage.

Further, the storage program writes the data stored in the auxiliary storage device to the external storage device at a timing asynchronous to the editing program, for example, at intervals of 5 minutes, and updates the data in the external storage device. As a result, even in unforeseen situations such as a power outage during editing work, at least 5
Data up to the previous minute is stored in an external storage device.
It is possible to prevent the loss of all edited data.

Furthermore, when restoring the system, by referring to the editing program ID and editing data stored in the external storage device, it is possible to restore the system to the state it was in just before the unexpected situation occurred, at least 5 minutes ago.

In addition, by providing battery backup to the volatile memory, all edited data can be prevented from being lost even in unexpected situations such as a power outage. A small amount of data being processed is transferred at high speed, and the data transferred to this volatile memory is transferred based on an arbitrary trigger.
It is stored in a large-capacity external storage device independently of editing processing. This allows data to be stored while keeping costs down and maintaining system processing speed.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the configuration of a document creation system according to the present invention.

An input device 1 consisting of a keyboard, etc. for inputting kana-kanji conversion and editing instructions, a printing device 3 for editing and printing the created document, and created document data 16
an external storage device 6 consisting of a fixed disk that semi-permanently stores data being edited, a display device 7 for displaying document data being edited, and a central processing unit (CPU).
The system controller 2 includes a main storage device 5 and a main storage device 5, and controls these devices to control processing operations such as document creation, editing, and printing.

With such a configuration, the document creation system creates, edits, displays, registers, etc. document data based on input instructions via the input device 1.

For example, document data 16 stored in the external storage device 6
, the system control unit 2 reads the document data 16 to be updated from the external storage device 6 into the main storage device 5 based on the editing program 11 registered in the main storage device 5. , and displays the read document on the screen of the display device 7.

The user updates the target document via the input device 1 while viewing the document being displayed on the display device 7.

Based on the document update information from the input device 1, the system control unit 2 updates the document data 16 in the main storage device 5,
In addition, the updated document is displayed on the display device 7 each time.

Further, the user can obtain a print result from the printing device 3 by inputting a print output command via the input device 1 as necessary.

While performing such processing, the system control unit 2 protects data according to the present invention.

That is, in this embodiment, the system control unit 2 is provided with the auxiliary storage device 4 and the auxiliary storage device control information flag 13 according to the present invention.

The main storage device 5 also stores an editing program 11 read out from an external storage device 6 or the like, a storage program 12,
Then, document data 14, which is an updated version of the document data 16, is stored. Then, the system control unit 2 performs the following processing operations according to the present invention.

First, the central processing unit 8 executes a document editing instruction from the input device 1 based on the editing program 11, edits a portion of the document data 16, and creates the document data 14.

After editing the document data 14, the central processing unit 8 registers the editing data from the document data 16 to the document data 14 in the auxiliary storage device 4. At this time, in the editing data,
Header information consisting of a program ID for specifying the editing program 11 and a page number indicating the storage position of the editing data in the document data 14 is added, and the data is registered in the auxiliary storage device 4 as the edited document data 15.

Next, the central processing unit 8 starts the stored program 12 at intervals of 5 minutes, for example, based on preset conditions.
The edited document data 15 registered in the auxiliary storage device 4 is transferred to the external storage device 6. And this edited document data 1
5, the document data 16 stored in the external storage device 6 is updated to the document data 14.

Furthermore, something like this! ! When performing recording, storage, and update processing, the central processing unit 8 sets the auxiliary storage device control information flag 1.
Refer to the state in step 3 to avoid processing conflicts.

By doing this, even if an unexpected failure such as a power outage occurs, at least the partially edited document data 15 up to a 5-minute song will be reflected in the document data in the external storage device 6, and the document data 14 will be reflected in the document data 14. protection can be provided.

If the auxiliary storage device 4 is backed up by a battery, even if the system power is turned off due to an unexpected failure such as a power outage, the latest edited document data 15 will be retained and the latest document data will be retained. Data 14 can be protected.

In this way, according to the present embodiment, only the edited document data 15 is stored in the auxiliary storage device 4.
A small capacity one is fine. Further, the auxiliary storage device 4 is composed of, for example, an SRAM, and the editing document data 15 can be registered from the main storage device 5 to the auxiliary storage device 4 at high speed without interfering with system processing.

Furthermore, the storage of the edited document data 15 from the auxiliary storage device 4 to the external storage device 6 is carried out using a storage program 12 that operates asynchronously with the editing program 11 under conditions that do not interfere with system processing. It does not adversely affect processing performance.

Furthermore, the edited document data 15 has header information including a program ID for identifying the editing program 11 and a page number indicating the storage location of the edited data in the document data 14, and is stored in the external storage device 6 as a protected file. It is registered as 17. As a result, when restarting editing after recovery from a failure, the central processing unit 8 can read the program ID on the protected file 17 and identify the editing program 11 that corresponds to the document data 14 that was being edited. In addition, it becomes possible to recognize the edited data portion based on the page number and automatically display the edited data portion on the display device 7, and editing can be resumed quickly.

Hereinafter, the processing operation according to the present invention of the system control unit 2 shown in FIG. 1 will be explained in more detail.

FIG. 2 is a flowchart showing one embodiment of the processing operation of the system control unit in FIG. 1 based on the editing program according to the present invention.

First, an editing program that is creating or editing a document is in a steady state, waiting for key input from an input device (step 201).

When a key is activated, the editing process specified by that key is performed. Through the editing process, for example, the document data 16 in the main storage device 5 in FIG. 1 is updated to the document data 14 (step 202).

When the series of editing processes is completed, the auxiliary storage device control information flag 13 shown in FIG. 1 is checked (step 203). If this auxiliary storage device control information flag is “O”, the first @
Since there is no program currently using the auxiliary storage device 4, the auxiliary storage device control information flag should be set to "1" (step 204), and the edited document data 15 in FIG. 1 is transferred to the auxiliary storage device 4 in FIG. Transfer (step 205). Then, to indicate the end of the transfer, the auxiliary storage device control information flag is set to "0" (step 206).

In step 203, if the auxiliary storage device control information flag is not "o", since there is a program using the auxiliary storage device, the edited document data is not transferred to the auxiliary storage device, and the process returns to step 201. Waiting for key personnel.

In this way, the document data 1 is stored on the main storage device 5 in FIG.
Edited document data 15 is registered in the auxiliary storage device 4 each time document data 14 is updated from 6 to 14.

At this time, by backing up the auxiliary storage device with a battery, the edited document data can be completely protected.

Next, processing using the storage program 12 shown in FIG. 1 will be explained.

FIG. 3 is a flowchart showing one embodiment of the processing operation of the system control unit in FIG. 1 based on the stored program according to the present invention.

The storage program 12 of FIG. 1, which performs processing independently and asynchronously of the editing program 11 of FIG. 1, waits for a preset fixed time (step 301).

After a certain period of time has elapsed, the auxiliary storage device control information flag 3 in FIG. 1 is checked (step 302). If this auxiliary storage device control information flag is "0", there is no program using the auxiliary storage device 4 shown in FIG. 1, so the auxiliary storage device control information flag is set to "2" (step 303).

The contents that already exist, that is, the edited document data, are deleted from the data protection protection file 17 of the external storage device 6 shown in FIG. 1, and new edited document data is registered (step 304). At the same time, the external storage device 6 in FIG.
The corresponding part of the document data 16 of
5, and the document data 16 is updated to the document data 14 (step 305).

Thereafter, to indicate the end of storage, the auxiliary storage device control information flag is set to "○j" (step 306).

In step 302, if the auxiliary storage device control information flag is not "0", there is a program using the auxiliary storage device 4 in FIG. 1, so the edited document data 15 on the auxiliary storage device 4 in FIG. is not stored in the external storage device 6, and returns to step 302 to wait until the auxiliary storage device control information flag becomes rQJ.

In this way, the document data 14 in FIG.
Edited document data 15 is stored in external storage device 6 in a manner that does not affect system processing.

Next, the structure of the edited document data 15 in the auxiliary storage device 4 in FIG. 1 will be explained.

FIG. 4 is an explanatory diagram showing an example of the structure of edited document data in the auxiliary storage device of FIG. 1.

Edited document data 15 includes, as header information, a program ID 41 indicating the type of editing program that created this edited document data, such as text, graphics, image, etc., and data on which page in the document. When editing an area such as graphics or images, the page number 42 indicates the page where the area being edited exists, and if there are multiple areas of the same type being edited, , indicates this area, and is configured with an area ID 43 that is not set during text editing.

The editing data 44 is text data when editing text;
Graphic data is used when editing graphics, and image data is used when editing images.

When editing an area, it is assumed that the text data in the document is stored in the external storage device 6 shown in FIG.

With this configuration, the edited document data 15 is held on the auxiliary storage device 4 in FIG. 1 as management data for the minimum unit of editing. Further, the edited document data 15 is registered in the protected file 17 on the external storage device 6 of FIG. 1 by the storage program 12 of FIG. will be updated to.

Next, a processing operation for reading a corresponding editing program from the header information of the edited document data 15 shown in FIG. 4 when the system recovers from a failure will be explained.

FIG. 5 is a flowchart showing an embodiment of the recovery processing operation of the system control unit in FIG. 1 according to the present invention.

In particular, this is an example in which the auxiliary storage device 4 in FIG. 1 is backed up by a battery, and when the system recovers from a failure, the editing program 11 in FIG. 1 that was running at the time of the failure is automatically activated. This explains the operations to be performed.

First, when the power is turned on and the edited document data 15 exists in the battery-backed auxiliary storage device 4 or the external storage device 6 shown in FIG. 1 (step 501),
Launch a text editing program (step 502)
.

The text editing program executes (
Step 503), the storage program 12 of FIG. 1 is activated (Step 504), and the edited document data 15 in the auxiliary storage device 4 of FIG. 1 is written to the external storage device 6 (Step 505).

After that, or if the auxiliary storage device control information flag is "l" in step 503, the edited document data 15 in the protected file 17 of the external storage device 6 in FIG.
Then, the editing program ID 41 shown in FIG. 4 is read (step 506).

If the read editing program ID 41 is not text editing (step 507), the text data is
Since it exists in an external storage device, the external storage device 6 in FIG.
Text data is read from (step 508).

If the editing program ID is text editing (step 507), the text data exists in the edited document data 15 of the external storage device 6 in FIG. The editing data 44 in the diagram is read as text data (step 50
9).

Next, the page number 42 of the edited document data 15 in FIG. 4 is read (step 510), and the read page is displayed on the screen of the display device 7 in FIG. 1 in a text updated state (step 511).

Then, if the editing program ID 41 is text editing (step 512), the process ends.

In step 512, the editing program ID of FIG.
41 is not text editing, the edited data 4 in FIG. 4 in the edited document data 15 in the external storage device 6 in FIG.
4 as area data (step 513), and then reads the area ID 43 in FIG. 4 in the edited document data 15 of the external storage device 6 in FIG. 1 (step 514).
). Then, using the editing data 44 in FIG. 4 as area data and updating the area of area ID 43, start the editing program corresponding to the editing program ID (step 51).
5) End the process.

In this way, when recovering from a failure, the system is automatically restored to the state immediately before the failure occurred.

In the document editing system explained in FIG. 5, the auxiliary storage device was backed up by a battery, but the present invention uses D
This can also be done using a volatile storage medium such as.

In this case, when the power is turned on, the edited document data 15 does not exist in the battery-backed auxiliary storage device 4 shown in FIG. 1, and the storage program 12 shown in FIG. The process of writing the edited document data 15 to the external storage device 6 (steps 501 to 506) is as follows:
From the beginning, from the edited document data 15 in the protected file 17 of the external storage device 6 in FIG.
Load the editing program ID41 in the diagram.

As described above, the difference between using a volatile memory without battery backup as an auxiliary storage device and using a volatile memory with battery backup is in the processing operation at the time of recovery.

That is, in a system using battery-backed volatile memory as the auxiliary storage, all data being processed is stored in the auxiliary storage and is completely protected.

On the other hand, when using volatile memory without battery backup, the data being processed is not protected until it is finally stored in the external storage device; Data disappears as soon as the power is turned off. However, with this method, it is also possible to use a part of the main storage device as the auxiliary storage device, and there is no need to provide new hardware, which is advantageous in terms of cost.

As described above with reference to FIGS. 1 to 5, according to this embodiment, the editing program: - At the end of the editing process, only the editing data is stored in the auxiliary storage device such as DRAM. It is only necessary to transfer the data, for example, 64 KB, and the storage process is completed in several tens of milliseconds, so there is almost no deterioration in performance during editing.

In addition, the storage program is different from the editing program in that it stores the data being worked on asynchronously at regular intervals.
Data can be protected without affecting performance during editing.

Furthermore, the recovery program can restore the system to the state immediately before the unexpected occurrence by starting the editing program using the protected editing data.

〔Effect of the invention〕

According to the present invention, a small amount of data being edited in the main memory is transferred to a low-cost volatile memory with a capacity that can be stored at high speed, and furthermore, the data transferred to the volatile memory is transferred independently from the editing process. Furthermore, by storing data in a large-capacity external storage device, it is possible to reduce costs and protect data while maintaining the processing speed of the system, thereby improving the performance of the data processing system.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, FIG. 1 is a block diagram showing an embodiment of the configuration of a document creation system according to the present invention, and FIG. FIG. 3 is a flowchart showing an example of the processing operation based on the editing program according to the invention; FIG. 1 is an explanatory diagram showing an example of the configuration of edited document data in the auxiliary storage device shown in FIG. 1, and FIG. 5 is a flowchart showing an example of the recovery processing operation according to the present invention of the system control unit shown in FIG. 1. It is. 1: Input device, 2 System control unit, 3: Printing device, 4
: Auxiliary storage device, 5: Main storage device, 6: External storage device,
7: Display device, 8: Central processing unit. 11: Editing program, 12: Storage program 13: Auxiliary storage device control information flag, 14: Document data, 15:
Edited document data, 162 document data, 17: Protected file, 41 Niprogram ID. 42: Page number, 43: Area ID, 44: Edit data. Figure Figure Figure Figure

Claims (2)

[Claims] (1) reading data stored in an external storage device into main memory, displaying the data read into the main memory on a display device, and editing the data displayed on the display device using an editing program; Edited data storage of a data processing system that transfers the edited edited data from the main memory to the external storage device using the editing program and changes the data stored in the external storage device to the edited data. In the control method, the data processing system has an auxiliary storage means consisting of a volatile memory, and uses the editing program to store the edited data edited in the editing process each time data in the main memory is edited. header information consisting of a program identifier that identifies the editing program and a page number that indicates the storage location of the data that has undergone the editing process, and the edited data with header information that has been added with the header information is edited by the above-mentioned method. registering the edited data with header information registered in the auxiliary storage means in the auxiliary storage means using a storage program that operates asynchronously with the editing program; , updating the data stored in the external storage device based on the edited data with header information registered in the protection file of the external storage device; When restarting after the power is turned off during the editing process of the above data, the above edited data with header information registered in the protection file of the above external storage device is detected, and identified by the above program identifier of the detected edited data with header information. An editing program is started, and the started editing program reads out the data stored in the external storage device into the manual memory, and generates data corresponding to the page number of the edited data with header information registered in the protected file. Displaying the edited data on the display device. (2) In the edited data storage control method for a data processing system according to claim (1), the auxiliary storage means is backed up by a battery, and the data processing system is restarted after the power is cut off during editing processing of the data. Sometimes,
When the above-mentioned edited data with header information registered in the above-mentioned auxiliary storage means but not registered in the protection file of the above-mentioned external storage device is detected, the above-mentioned storage program is started, and the detected edited data with header information is Register from the auxiliary storage means to the protection file of the external storage device,
A method for controlling the storage of edited data in a data processing system, characterized in that the editing program is activated based on the edited data with header information stored in the external storage device.