JP2913774B2 - Editing data storage control method for data processing system - Google Patents

Description

The present invention relates to a method for protecting data in a data processing system and a method for recovering the data, and more particularly, to protecting data in response to an unexpected failure such as a power failure, The present invention relates to a method for controlling the editing data storage of a data processing system suitable for efficiently starting the system automatically after recovery from a failure.

[Conventional technology]

At present, various types of data are processed using a system using a computer. These data are processed in the main storage unit of the computer, and the contents of the data are changed. These data are stored in the external storage device from the main storage unit after the content change processing. 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 to the main storage unit and perform a desired operation based on the data.

However, if the supply of external power is stopped during data processing due to, for example, a power failure, the data being processed in the main storage unit will be lost without being registered in the external storage device. For this purpose, the user must retrieve the conventional data again from the external storage device and perform the same processing from the beginning.

In order to prepare for such an unexpected situation such as a power failure, in the related art, a large amount of non-volatile memory is mounted on a computer system, and during the data processing operation,
Some data are protected by transferring and storing the data being processed.

Alternatively, there is a device that protects data by transferring and storing data being processed to a storage device such as a large-capacity disk, for example, a hard disk.

When restoring the system, there is a method that uses data stored in these nonvolatile memories or disks.

For example, as described in pp. 226 of "Japanese Word Processor RIPORT 5300 Series User's Manual, Function 1" issued by Ricoh Company, Ltd. in 1988, a document being edited and proofread based on a predetermined key operation. Some are stored in a temporary registration area of a fixed disk.

[Problems to be solved by the invention]

Conventionally, in order to protect data during processing in response to unexpected situations, a large amount of non-volatile memory has been installed,
In this memory, the data being processed can be transferred and stored,
Further, the data being processed is transferred and stored in a large-capacity disk to protect the data.

The method using a large amount of non-volatile memory enables high-speed processing, and a decrease in the processing capacity of the system due to the time required for the data protection processing is small. However, since the nonvolatile memory is expensive, it is not suitable for a low-cost system.

The method using a large-capacity disk does not use an expensive non-volatile memory, but takes a long time to write data to the disk, thereby lowering the processing performance of the system.

An object of the present invention is to solve these problems of the prior art, transfer a small amount of data during editing processing on a main memory to a small-capacity volatile memory at high speed, and transfer the data transferred to the volatile memory. , Based on an arbitrary trigger, independent of the editing process, and stored in a large-capacity external storage device, thereby reducing costs and maintaining the processing speed of the system.
An object of the present invention is to provide a method for controlling the storage of edited data in a data processing system that enables data protection processing.

[Means for solving the problem]

To achieve the above object, the present invention provides an editing data storage control method for a data processing system, comprising the steps of: (1) reading data stored in an external storage device into a main storage; and reading the data read into the main storage into a display device. Display and edit the data displayed on the display device using an editing program, the edited editing data, using an editing program, transferred from the main storage to the external storage device, the data stored in the external storage device, In the edit data storage control method for a data processing system that changes to edit data, the data processing system has an auxiliary storage unit including a volatile memory, and uses an editing program to edit data in the main storage. A program identifier for specifying an editing program, a page number indicating the storage location of the edited data, and Registering the edit data with header information to which the header information is added from the main storage to the auxiliary storage means, and using a storage program which operates asynchronously with the editing program. The edited data with the header information registered in the external storage device is registered in the protected file of the external storage device asynchronously with the operation of the editing program, and stored in the external storage device based on the edited data with the header information registered in the protected file. A step of updating data; and, at the time of restarting after power-off during data editing processing of the data processing system, detecting edited data with header information registered in the protected file of the external storage device, and detecting the detected header information. Starts the editing program specified by the program identifier of the editing data with the By an,
Reading the data stored in the external storage device into the main storage, and displaying, on a display device, data corresponding to the page number of the edited data with header information registered in the protected file.

(2) In the editing data storage control method for a data processing system according to the above (1), the auxiliary storage device is backed up by a battery, and when the data processing system is restarted after power-off during data editing processing, If the edited data with the header information registered in the auxiliary storage means and not registered in the protection file of the external storage device is detected, the storage program is started and the detected edited data with the header information is transferred from the auxiliary storage device to the external storage device. The editing program is started based on the editing data with the header information registered in the protection file of the storage device and stored in the external storage device.

[Action]

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

Then, based on a data editing instruction from the user, when editing data in the main storage device by an editing program, each time one editing process is completed, an editing program ID or the like is added to the editing data, Store in auxiliary storage.

The storage program writes the data stored in the auxiliary storage device to the external storage device at a timing asynchronous with the editing program, for example, at intervals of five minutes, and updates the data in the external storage device. As a result, even in the event of an unexpected situation such as a power outage during editing,
The data up to 5 minutes ago is stored in the external storage device, and all edited data can be prevented from being lost.

Further, when the system is restored, the system can be restored to a state immediately before the occurrence of the unexpected situation, at least five minutes before, by referring to the editing program ID and the editing data stored in the external storage device.

In addition, by performing battery backup in the volatile memory, it is possible to prevent all edited data from being lost even in an unexpected situation such as a power failure.

As described above, a small amount of volatile memory is transferred at a high speed to a small amount of data being edited on the main memory while the data transferred to the volatile memory is edited based on an arbitrary trigger. Independently, it is stored in a large-capacity external storage device. As a result, data can be stored while suppressing costs and maintaining the processing speed of the system.

〔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 a configuration according to the present invention of a document creation system according to the present invention.

An input device 1 such as a keyboard for inputting kana-kanji conversion and editing instructions, a printing device 3 for printing edited and created documents, and created document data 16
, An external storage device 6 such as a fixed disk for semi-permanently storing data being edited, a display device 7 for displaying document data being edited, and a central processing unit (CPU). ) 8 and a main storage device 5. These devices are controlled to create and edit documents,
It comprises a system control unit 2 for controlling processing operations such as printing.

With such a configuration, the document creation system creates and manages document data based on an input instruction through the input device 1.
Edit, display, register, etc.

For example, the document data 16 stored in the external storage device 6
Is updated, 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. . Then, the read document is displayed 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,
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 needed.

While performing such processing, the system control unit 2
Performs data protection 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 stores an editing program 11 and a storage program 12 read from the external storage device 6 and the like, and document data 14 obtained by updating the document data 16. Then, the system control unit 2 performs the following processing operation 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 part of the document data 16, and creates the document data.

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

Next, the central processing unit 8 activates the storage program 12 based on a preset condition, for example, at intervals of 5 minutes,
The edited document data 15 registered in the auxiliary storage device 4 is transferred to the external storage device 6. Then, based on the edited document data 15, the document data 16 stored in the external storage device 6 is read.
Is updated to document data 14.

When performing such registration, storage, and update processing, the central processing unit 8 sets the auxiliary storage device control information flag 13
Refer to the state of, so that there is no processing conflict.

In this way, even if an unexpected failure such as a power failure occurs, the partially edited document data 15 at least up to 5 minutes before is reflected in the document data in the external storage device 6 and the document data 14 Protection can be provided.

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

As described above, according to the present embodiment, since only the edited document data 15 is stored in the auxiliary storage device 4,
May be of small capacity. The auxiliary storage device 4 is made of, for example, an SRAM, and the registration of the edited document data 15 from the main storage device 5 to the auxiliary storage device 4 is performed at high speed, and does not hinder the processing of the system.

Further, the storage of the edited document data 15 from the auxiliary storage device 4 to the external storage device 6 is performed using a storage program 12 that operates asynchronously with the editing program 11 under conditions that do not hinder system processing. There is no adverse effect on processing performance.

Further, the edited document data 15 includes a program ID for specifying the editing program 11 and the document data of the edited data.
It has header information including a page number indicating a storage position in 14 and is registered as a protected file 17 in the external storage device 6. Thus, when editing is resumed after recovery from the failure, the central processing unit 8 reads the program ID on the protected file 17 and identifies the editing program 11 corresponding to the document data 14 that was being edited. This makes it possible to recognize the edited data portion based on the page number, automatically display the edited data portion on the display device 7, and quickly resume editing.

Hereinafter, the processing operation of the system control unit 2 in FIG. 1 according to the present invention will be described 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, the editing program in the process of creating and editing a document waits for a key input from the input device in a steady state (step 201).

When a key input is received, the editing process specified by the key is performed. By 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 a series of editing processes is completed, the auxiliary storage device control information flag 13 shown in FIG. 1 is checked (step 203). If the auxiliary storage device control information flag is "0", there is no program using the auxiliary storage device 4 in FIG. 1, so the auxiliary storage device control information flag is set to "1" (step
204), the edited document data 15 in FIG. 1 is transferred to the auxiliary storage device 4 in FIG. 1 (step 205). Then, the auxiliary storage device control information flag is set to “0” to indicate the end of the transfer.
(Step 206).

In step 203, if the auxiliary storage device control information flag is not “0”, 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. Wait for key input.

As described above, the document data is stored in the main storage device 5 in FIG.
Each time the document data 16 is updated from the document data 14, the edited document data 15 is registered in the auxiliary storage device 4.

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

Next, processing using the storage program 12 of FIG. 1 will be described.

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

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

After a lapse of a certain time, the auxiliary storage device control information flag 13 in FIG. 1 is checked (step 302). If the auxiliary storage device control information flag is "0", the auxiliary storage device 4 shown in FIG.
Since no program is currently using, the auxiliary storage device control information flag is set to "2" (step 303).

In the protection file 17 for data protection in the external storage device 6 of FIG. 1, the existing content, that is, the edited document data is deleted, and new edited document data is registered (step 304). At the same time, the corresponding part of the document data 16 in the external storage device 6 in FIG. 1 is changed to the edited data of the edited document data 15, and the document data 16 is updated to the document data 14 (step 305).

Thereafter, the auxiliary storage device control information flag is set to "0" to indicate the end of storage (step 306).

In step 302, if the auxiliary storage device control information flag is not "0", there is a program in use of 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, the process returns to step 302, and waits until the auxiliary storage device control information flag becomes “0”.

Thus, the document data 14 in FIG.
The process of storing the edited document data 15 in the external storage device 6
Perform this without affecting the processing of the system.

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

FIG. 4 is an explanatory diagram showing one embodiment of the configuration of edited document data in the auxiliary storage device of FIG.

The edit document data 15 includes, as header information, the edit data 44 with, as header information, a program ID 41 indicating the type of the edit program that created the edit document data, for example, text, graphics, an image, and the like. Indicates the page is being edited, and 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 This area is provided with an area ID 43 that is not set during text editing.

The editing data 44 is text data at the time of text editing,
It is graphic data when editing graphics, and image data when editing images. At the time of region editing, the text data in the document is stored in the external storage device 6 in FIG. 1, and then the target region is edited.
Has no text data.

With such a configuration, the edited document data 15 is held on the auxiliary storage device 4 in FIG. 1 as management data of the minimum unit of editing. Further, the edited document data 15 is registered in the protection file 17 on the external storage device 6 in FIG. 1 by the storage program 12 in FIG. 1, and based on the edited document data 15, the document data 16 is converted into the document data 14 Will be updated to

Next, a description will be given of a processing operation for reading a corresponding editing program from the header information of the edited document data 15 in FIG. 4 at the time of system recovery from a failure.

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

In particular, this is an example in which a battery backed-up device is used as the auxiliary storage device 4 in FIG. 1, and when the system recovers from a failure, the editing program 11 in FIG. This is an explanation of the operation performed.

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

When the auxiliary storage device control information flag 13 in FIG. 1 is “0” or “2” (step 503), the text editing program starts the storage program 12 in FIG. 1 (step 504). Write the edited document data 15 in the auxiliary storage device 4 in FIG. 1 to the external storage device 6 (step
505).

Thereafter, or if the auxiliary storage device control information flag is "1" in step 503, the editing program ID 41 shown in FIG. 4 is read from the edited document data 15 in the protected file 17 of the external storage device 6 shown in FIG. (Step
506).

If the read editing program ID 41 is not a text edit (step 507), since the text data exists in the external storage device, the text data is read from the external storage device 6 in FIG. 1 (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.
Of the edited document data 15 in FIG.
Read as text data (step 509).

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 a text editing (step 512), the process ends.

In step 512, the editing program ID 41 shown in FIG.
Is not a text edit, the edit data 44 of FIG. 4 in the edit document data 15 of the external storage device 6 of FIG. 1 is read as area data (step 513). The area ID 43 shown in FIG. 4 in the edited document data 15 is read (step 514). Then, the editing program corresponding to the editing program ID is started with the area of the area ID 43 being updated using the editing data 44 of FIG. 4 as the area data (step 515), and the process is terminated.

In this way, at the time of restoration from a failure, the system is automatically restored to the state immediately before the occurrence of the failure.

In the document editing system described with reference to FIG. 5, a battery backup is used in the auxiliary storage device. However, the present invention is performed using a volatile storage medium such as a DRAM (Dynamic RAM). Can also.

In this case, when the power is turned on, the edited document data 15 does not exist in the battery-backed-up auxiliary storage device 4 in FIG. 1, and the storage program 12 in FIG. The edited document data 15 is stored in the external storage device 6
The processing for writing to the external storage device 6 (steps 501 to 506) is not performed.
The editing program ID 41 shown in FIG. 4 is read from the edited document data 15 in FIG.

As described above, the difference between the case where the volatile memory without the battery backup is used as the auxiliary storage device and the case where the volatile memory with the battery backup is used lies in the processing operation at the time of restoration.

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

On the other hand, when volatile memory without battery backup is used, the data being processed is not protected until it is finally stored in the external storage device, and is only stored in the auxiliary storage device. Data disappears as soon as the power is turned off. However, in this method, a partial area of the main storage device can be used as the auxiliary storage device, and it is not necessary to provide new hardware, which is advantageous in cost.

As described above with reference to FIGS. 1 to 5, according to the present embodiment, at the end of one editing process, the editing program stores only the editing data in the auxiliary storage device constituted by a DRAM or the like. Only the transfer is required. For example, since the storage processing is completed at a speed of several tens of ms at 64 KB, there is almost no deterioration in performance during editing.

The storage program stores the data being worked on at regular intervals asynchronously with the editing program, and can protect the data without affecting the performance during editing.

In addition, the recovery program can start the editing program using the protected editing data, and can recover the system to a state immediately before the occurrence of the unexpected itself.

〔The invention's effect〕

According to the present invention, a small amount of data being edited on the main memory is transferred at high speed to a low-cost, small-capacity volatile memory, and the data transferred to the volatile memory is independent of the editing process. In addition, by storing the data in a large-capacity external storage device, it is possible to reduce the cost and to perform data protection processing while maintaining the processing speed of the system, thereby improving the performance of the data processing system.

[Brief description of the drawings]

1 shows an embodiment of the present invention. FIG. 1 is a block diagram showing an embodiment of the configuration of the document creating system according to the present invention to which the present invention is applied. FIG. 2 is a block diagram of a system control unit in FIG. FIG. 3 is a flowchart showing one embodiment of a processing operation based on an editing program according to the present invention; FIG. 3 is a flowchart showing one embodiment of a processing operation based on a storage program according to the present invention of the system control unit in FIG. 1; FIG. 5 is an explanatory diagram showing an embodiment of the configuration of edited document data in the auxiliary storage device of FIG. 1, and FIG. 5 is a flowchart showing an embodiment of a recovery processing operation of the system control unit in FIG. 1 according to the present invention. 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: stored program, 13: auxiliary storage device control information flag, 14: document data, 15: edited document data, 16: document data, 17: protected file, 41: program
ID, 42: page number, 43: area ID, 44: edit data.

Continuation of the front page (56) References JP-A-63-65548 (JP, A) JP-A-62-154150 (JP, A) JP-A-60-3735 (JP, A) JP-A-2-7156 (JP) JP-A-62-282318 (JP, A) JP-A-2-87241 (JP, A) JP-A-63-175949 (JP, A) JP-A-63-217441 (JP, A) 3-19046 (JP, A) JP-A-4-24752 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G06F 12/00, 12/16 G06F 17/21, 11 / 00

Claims (2)

(57) [Claims] The data stored in an external storage device is read into a main storage, the data read into the main storage is displayed on a display device, and the data displayed on the display device is edited using an editing program. Then, the edited edit data is transferred from the main storage to the external storage device using the editing program, and the data stored in the external storage device is
In the editing data storage control method of the data processing system for changing to the editing data, the data processing system has an auxiliary storage unit composed of a volatile memory, and edits data in the main storage using the editing program. For each process, the edit data edited in the edit process is provided with header information including a program identifier for specifying the edit program and a page number indicating a storage position of the edited data, Registering the edited data with header information to which information has been added from the manual storage to the auxiliary storage means; and using the storage program operating asynchronously with the editing program, the header data registered in the auxiliary storage means. The editing data is registered in the protected file in the external storage device asynchronously with the operation of the editing program. Updating the data stored in the external storage device based on the edited data with the header information registered in the protected file; and after a power failure during the data editing process of the data processing system. Upon restarting, the edit data with the header information registered in the protected file of the external storage device is detected, and the edit program specified by the program identifier of the detected edit data with the header information is started,
With the activated editing program, the data stored in the external storage device is read into the manual storage, and the data corresponding to the page number of the editing data with the header information registered in the protection file is stored in the display device. Displaying the edited data storage method of the data processing system. 2. The editing data storage control method for a data processing system according to claim 1, wherein said auxiliary storage means is backed up by a battery so that said data can be stored in said data processing system after a power cut during a data editing process. If the edited data with the header information registered in the auxiliary storage means and not registered in the protection file of the external storage device is detected at the time of restart, the storage program is started and the detected header information is added. Editing data, from the auxiliary storage means, in a protection file of the external storage device, and activating the editing program based on the editing data with header information stored in the external storage device. Editing data storage control method.