JPH08161211A - Method and device for restoring file by logging - Google Patents

Abstract

PURPOSE: To improve the maintainability, reliability and efficiency of the partial fault restoration of the hard disk of a terminal for which the capacity of the hard disk is limited and measures at the time of a file fault can not be duplexed in the terminal used standing alone such as a POS terminal. CONSTITUTION: When a job means 1 is activated, a job management means 7 uses a logging means 5 and a data saving means 8. The data saving means 8 reads the data of a data file 11 to be saved from a data file group 4 and stores them in a saving device 9. Then, they are entirely stored in a logging device 6 while a job is activated by the logging means 5. When a fault is generated in the data file 11 while the job means 1 is activated, after the hard disk is restored, the data before updating saved in the saving device 9 are transferred to the data file 11 by a file restoration means 10, the job means 1 updates the data file 11 after transfer is completed and thus, the data file group 4 is restored to a state immediately before the fault is generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a terminal that is used stand-alone, such as a POS terminal, and has a limited hard disk capacity. Therefore, the present invention relates to a file recovery method and device when the terminal becomes unusable.

[0002]

2. Description of the Related Art As a conventional file recovery method, when a hard disk fails, particularly when a terminal becomes unusable due to a failure in some sectors, the hard disk is completely unusable. In the same way as when it became, the data was recovered by the procedure shown below. Back up the file that has no file error, that is, the file to be updated, to another medium. Replace the hard disk. Install the terminal. Install the backed up data files. Perform recovery work for the failed data file.

[0003]

However, when the hard disk is restored by the conventional method, the backed up file can be restored until just before the failure even after the disk replacement. Cannot be recovered at all. Therefore, when recovering a failed data file, the method described in (a) or (a) below has been adopted. (A) Process the data file based on the input journal. Alternatively, create it based on another data file.
Alternatively, (a) the terminal is used from the initial state without restoring the data file. The information entered up to immediately before the failure will be created later by the maintenance department based on the input journal.

In the case of the above-mentioned method (A), since the data file is artificially processed, there is a problem that it takes a long time to check the input information and the data consistency. In addition, there is a problem that the number of workers is limited because it is necessary for the workers to be familiar with the specifications of the data file.

In the case of the above-mentioned method (a), the data up to the time immediately before the failure is once invalidated, so that if continuous data such as inventory data cannot be recovered, business processing is affected. There is a problem of doing. Also, PO
When it is desired to immediately grasp the current day's data as with the S terminal, there is a problem that data omission occurs and legitimate data cannot be obtained. Further, since data is created by re-inputting based on the input journal, there is a problem that it takes a long time.

Therefore, a first technical object of the present invention is to provide a file recovery method and device by logging, which makes it possible to reduce an evacuation device for failure recovery of a hard disk.

A second technical object of the present invention is to provide a file restoration method and apparatus which can reduce the maintenance man-hours and hence the influence on other work.

Further, a third technical object of the present invention is to provide a file restoration method and apparatus in which data consistency at the time of restoration is ensured and data reliability is improved.

[0009]

According to the file recovery method by logging of the present invention, a storage unit which is used standalone and has a limited capacity is provided.
In the file recovery method for terminals that cannot be duplicated,
A logging step of performing logging for recording input information, a job management step of managing the start and end of the logging, a data saving step of storing data before update of an update destination data file, and a logging step when a file failure occurs. And a file restoration step of restoring the data file by performing the job management step.

Further, in the file restoration apparatus of the present invention, the logging which records the input information in the terminal which is used as a stand-alone, has the storage means with a limited capacity, and cannot duplicate the measures against the file failure. By means of the logging means for performing the above, the job management means for managing the start and end of the logging, the data saving means for storing the data before update of the update destination data file, and the logging means and the job management means at the time of a file failure, File recovery means for recovering a data file is provided, and failure recovery can be performed in the event of a partial failure of the storage means.

Here, in the file restoration device by logging of the present invention, the data files in the data file group are updated from the input information, and the job management means transfers the input information to the logging means. The data is transferred to the internal logging device, the usage information including the file name of the data file to be saved is notified to the data saving means, the data of the data file to be saved is read from the data file group, and the data is saved to the saving device. When the data file is stored and a failure occurs in the data file, the job management means terminates the logging means, and, via the file restoration means, the data from the save device storing the data before the failure is stored. And transfer the saved data to the data files in the data file group. After the transfer of the saved data, receives the input information from the internal logging device via the logging means, it is preferable to carry out the updating of the data file.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the overall configuration of a file restoration device using logging according to an embodiment of the present invention. As shown in FIG. 1, the file restoration device 20 includes a screen input / output unit 3
An input / output control unit 2, a job management unit 7 connected to the I / O control unit 2, a logging unit 5 connected to the job management unit 7, and a job unit 1 connected to the job management unit 7. A file recovery means 10 similarly connected to the job management means 7, a data saving means 8 similarly connected to the job management means 7, a data file group 4 connected to the job means 1, and an internal logging device. 6 and a retractor 9. Among these, job means 1, job management means 7, logging means 5, data saving means 8,
And the file recovery means 10 may actually be considered as a step executed by a software program.

Next, an example in which the job means 1 for updating the data file is activated will be described.

First, referring to FIG. 1, when the job means 1 is started, the job management means 7 notifies the start of use of the logging means 5 and the data saving means 8 and the use information at the start of starting. As the usage information, the file name of the data file 11 to be saved is notified to the data saving means 8. The data saving means 8 receives the usage information from the job management means 7, reads the data of the data file 11 to be saved from the data file group 4, and stores it in the saving device 9. A plurality of data files 11 can be saved. After the processing of the data saving means 8 is completed, the job management means 7 notifies the logging means 5 of the start of use, and requests the operator by the screen input / output unit 3 through the input / output control unit 2.

When a key input is made in the screen input / output section 3, the input key information is passed to the logging means 5 by the job management means 7 and stored in the internal logging device 6. From the information input from the screen input / output unit 3, the job unit 1
Updates the data file 11 in the data file group 4. While the job unit 1 is activated, all the keys input from the screen input / output unit 3 are stored in the internal logging device 6 by the logging unit 5. When the job means 1 is terminated, the job means 1 sends to the job management means 7,
The operation completion notification of the logging means 5 is given.

Data file 11 during job means 1 startup
If there is a failure, the job means 1 notifies the job management means 7 of the failure. The job management means 7 terminates the logging means 5 upon the notification of the occurrence of the failure, displays a message indicating the occurrence of the failure on the screen input / output section 3, and notifies the operator of the occurrence of the failure. After that, the maintenance department restores the hard disk in the following order (i) to (ho). (Ii) Backup of the file in which no file error has occurred to another medium is performed. At this time, logging device 6
Or, if the backup device exists in the hard disk, back up. (B) Replace the hard disk.
(Ha) Install the terminal. Install the backed up data files.
At this time, if the logging device 6 or the saving device exists in the hard disk, the installation is performed. (Ho) Perform restoration work for the failed data file. here,
Follow the procedure below to restore the failed data file.

The failure recovery start key is operated from the screen input / output unit 3 to notify the failure recovery start. The job management means 7 notifies the file restoration means 10 of the restoration start by notifying the failure restoration start. The file restoration means 10 reads the data from the save device 9 in which the data before the failure occurs is stored, and transfers the saved data to the data file 11 of the data file group 4. When the transfer is completed, the file transfer unit 10 notifies the job management unit 7 of the transfer end. Next, the job management means 7 notifies the logging means 5 of the reading of the internal logging device 6 and activates the job means 1. The job management means 7 receives the input information from the logging means 5 and delivers it to the job means 1. The job means 1 receives the input information from the screen input / output section 3 as if the operator had input it, and updates the data file 11. The job management unit 7 controls the logging unit 5 and the job unit 1 until all the input key information stored in the logging device 6 is executed, and after all the input key information has been executed,
Screen input / output unit 3 and job unit 1 through the input / output control unit 2
The process returns to the normal process for controlling. Since all the input key information becomes the environment just before the failure at the end of execution, the operator can continue the work.

FIG. 2 is a diagram showing the contents of the internal logging device 6 of FIG. Logging information 2 which is an input key table
1 is composed of key data 22 of K1 to Kn. Input key data is continuously stored. The storage number n is determined as needed. When the operation of the logging means 5 starts, the data is stored in order from K1 and is sequentially read from K1 when data recovery starts. The internal logging device 6 is prepared in a hard disk, a floppy disk, or a non-volatile memory.

3 and 4 are views showing the construction of the retracting device 9. The save device 9 includes a management unit 31 and a save information unit 32 shown in FIG. 3, and a save data unit 33 shown in FIG. The management unit 31 includes an information number area 34 for storing the number of saved data files and a storage position area 35 for indicating a storage startable position (address) in the saved file. The save information section 32 has a file information section 36 that stores information for each file, and includes F1 to Fm according to the number of files to be saved. Each file information section (F1
To Fm) 36 is a portion 37 (F11 to F) showing the file name.
m1) and the storage unit 38 (F12 to F) indicating the storage position of the evacuation device
m2) and. The storage section 38 has a start section 38a (F121 to Fm21) indicating a start position (address) and an end section 38b (F122 to Fm221) indicating an end position (address).
It is composed of

The save data section 33 (S1) shown in FIG.
Is composed of a data length 51 for storing a data length (l1) area of the saved data file, a number of areas 52 for storing the number of saved data cases (b1), and an area 53 for storing data (d11, d12). There is. When there are a plurality of data files to be saved, the save data unit 33 stores a plurality of data files.

The save device 9 is provided in a hard disk, a floppy disk, or a non-volatile memory.

The data saving operation will be described with reference to FIGS.

The data saving means 8 stores the file name in the file name F111 of the file information section (F1) 36 of the saving device 9 according to the saved file information notified from the job management means 7, and stores the storage position in the area 35. To store. In addition, the start position of the storage position is stored in the start portion F121, the data file is read, and the data length is set to the data length (l
1) to area 51, read data (d11, d12,
...) are sequentially stored in the area 53. After storing all the data, the number of stored data items, the number of data items (b1) are stored in the area 52, and the storage end position (address) is the storage position 3
Store in 5. When there are a plurality of saved data files, they are sequentially stored in the file information part of F2 to Fm and the saved data part of S2 to Sm. Finally, the number of saved files is stored in the information number 34.

When the job management means 7 notifies the file restoration means 10 of the restoration start, the file restoration means 10 reads the data of the file information portion 36 from the saved information portion 32 of the saving device 9. In this case, the file name area 37 and the storage location area 38 are loaded into the file name and storage location, respectively, and the saved data section 33 outputs the data to the loaded data file group 4. Furthermore, the number of saved files is acquired from the number of information items in the area 34, the data of the corresponding saved data section 33 is read by the file information sections F1 to Fm, the data length is acquired by the data length area 51, and the acquired data length is used. Data corresponding to the number of data items 52 stored in the area 52 are sequentially output from the area 54 to the data file group 4. After outputting to all data files, the storage position area 35 is initialized.

In the embodiment of the present invention, only the input key information is shown as an example of the input information, but the input information other than the input key information, for example, the input information input via the external line is also applicable. What can be used is
it is obvious.

[0027]

As described above, according to the present invention, since the file information about the file used in the job is stored, the capacity of the evacuation device for recovering from a hard disk failure can be reduced.

Further, according to the present invention, since the input key is stored, the input information is re-executed in the data recovery work in the event of a failure, so that the maintenance personnel may execute the operation of the recovery means. The man-hours can be reduced. Therefore, the influence on other work can be reduced.

Further, in the present invention, since the restored data is the data after the re-execution, the consistency is maintained and the reliability of the data is improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a file restoration device by logging according to an embodiment of the present invention.

2 is a diagram showing the logging device of FIG. 1. FIG.

FIG. 3 is a diagram showing the retractor of FIG.

FIG. 4 is a diagram showing the evacuation device of FIG.

[Explanation of symbols]

 1 job means 2 input / output control section 3 screen input / output section 4 data file group 5 logging means 6 internal logging device 7 job management means 8 data saving means 9 saving apparatus 10 file restoring means 11 data file 21 logging information (input key table) 22 input keys (K1 to Kn) 31 management section 32 save information section 33 save data section (S1 to Sm) 34 information number area 35 storage position area 36 file information section (F1 to Fm) 37 file name (F11 to Fm1) Part indicated 38 38 Storage position (F11 to Fm2) area 38a Start part (F121 to Fm21) 38b End part (F121 to Fm21) 51 Data length (l1 to lm) area 52 Data count (b1 to bm) area 53 data (D1 to dm) area 54 data (d11 to dma) area

Claims (5)

[Claims] 1. A logging stage for logging input information in a file restoration method of a terminal which is used standalone and has a storage unit with a limited capacity, and which cannot duplicate a countermeasure against a file failure. Data by performing a job management step of managing the start and end of the logging, a data saving step of storing the pre-update data of the update destination data file, and the logging step and the job management step at the time of a file failure. A file recovery method by logging, comprising a file recovery stage for recovering a file. 2. The file recovery method by logging according to claim 1, wherein the storage unit is composed of a memory having an evacuation device for storing data to be evacuated and an internal logging device for storing input information. A file recovery method using logging. 3. The file recovery method by logging according to claim 2, further comprising a data file in a data file group including a data file updated from the input information, wherein the input information is stored in the logging step. In addition to storing in the internal logging device, in the data saving step, the usage information including the file name of the data file to be saved and the data of the data file to be saved are read from the data file group and stored in the saving device. If a failure occurs in
In the job management step, the logging step is ended, the file recovery step is started, data is read from the save device in which the data before the failure is stored, and the save data is saved in the data file of the data file group. A method for recovering a file by logging, which comprises transferring the saved data, receiving the input information from the internal logging device, and updating the data file. 4. A logging unit which is used as a stand-alone unit, has a storage unit with a limited capacity, and which performs logging for recording input information in a terminal in which duplication of measures against a file failure is impossible, and the logging unit. Management means for managing the start and end of data, a data saving means for storing the data before update of the update destination data file, and a file recovery means for recovering the data file by the logging means and the job management means in the event of a file failure And a file recovery device by logging, which is capable of performing failure recovery in the event of a partial failure of the storage means. 5. The file recovery device by logging according to claim 4, wherein the storage means stores a save data from the data save means, and an internal logging device stores input information from the logging means. A file recovery device by logging having a memory provided with.