JPH04309162A - Method for copying file between dual disks - Google Patents

Abstract

PURPOSE:To obtain the file copying method between dual disks which applies only the irreducibly minimum load to a system. CONSTITUTION:This copying method is provided with a console 1 to input a copy processing start command for designating the disk storing objective data and the number of days, a command analysis part 2 to confirm normality by analyzing the copy processing start command inputted by the console, a system control part 3 to generate a copy task by recognizing the contents of the copy processing start command while receiving the output of this command analysis part, and a copy task part 6 to calculate the address of a position storing the relevant data from a master disk storing the objective data inputted by the console and the number of days for the objective data while exclusively controlling files in the two disks according to the copy task generated by the system control part 3 and to copy the data designated by this address from the master disk 4 to the same file in a slave disk 5.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for copying files between dual disks.

0002

[Prior Art] In the conventional method for copying files between dual disks, the copy instruction is to copy all records from the data start position to the final address in the file allocated to the disk.

0003

[Problem to be Solved by the Invention] In the conventional method for copying files between dual disks described above, the copy instruction content is such that all records from the data start position to the final address in the file allocated to the disk are copied. For example, even if the time when one disk was disconnected from an online job was within the same day that the copy was performed, all records managed in the file for the past seven days would be copied. This poses a problem in that unnecessary records are also copied, which puts more load on the system than necessary and delays the original processing.

[0004] An object of the present invention is to create a system between dual disks that can specify the disk storing target data and the number of days of target data, and that places only the minimum necessary load on the system. The goal is to provide a method for copying files.

[0005]

[Means for Solving the Problems] A method for copying files between dual disks according to the present invention is a method for copying files between dual disks that automatically records reports sent and received by an online information processing device. a console for inputting a copy processing start command that specifies the stored disk and the number of days of the target data; a command analysis unit for analyzing the copy processing start command input by the console and confirming normality; a system control unit that receives the output of the analysis unit, recognizes the content of the copy processing start command, and generates a copy task; and a system control unit that receives the output of the analysis unit, recognizes the contents of the copy process startup command, and generates a copy task; The address of the storage location of the applicable data is determined from the master disk that stores the input data and the number of days of the target data, and the data specified by this address is transferred from the master disk to the same slave disk. This configuration includes a copy task unit that copies to a file.

[0006]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

The functions of the present invention include a console 1 that inputs a copy process start command that specifies the disk storing target data and the number of days of the target data, and a console 1 that inputs a copy process start command input by the console 1. A command analysis unit 2 that analyzes and confirms normality, a system control unit 3 that receives the output of the command analysis unit 2, recognizes the content of the copy processing start command, and generates a copy task, and a copy task generated by the system control unit 3. console 1 while taking exclusive control of the files on the two disks.
The address of the storage location of the relevant data is determined from the master disk 4 storing the input target data and the number of days of the target data, and the data specified by this address is transferred from the master disk 4 to the slave disk 5. This is realized by a copy task unit 6 that copies to the same file.

Next, the operation will be explained.

FIG. 2 is a flow chart of the first half of the copy task operation of the present invention.

[0011] In step (hereinafter referred to as S) 1, as an initial process, the system control task is notified that copy processing is to be started, and the system control task generates and generates a copy task.
Recognize startup. Next, in S2, the program recognizes from the copy processing start command information input from the console 1 what disk is the target of copying and how many days' worth of data is instructed to be copied.
Get the start position of the file to be copied as a pointer. Next, in S3, set data indicating today in the "Date identification" area that indicates the date and day on which copying is currently being performed, and
Set the identification of the data to be copied first (the order of copying is set in advance when creating the program) in the "Data identification" area that indicates the type of data. Next S5
The address of the starting point of the data area used in this online system (in this case, the address is S2
By referring to the "file management table" that has the relative position (relative to the start position of the file to be copied calculated in ) and the address of the end point of the used area within the same area, date identification and data identification can be avoided. Get the address of the data. Next, in S6, exclusive processing is performed on the file being copied, the first half of the processing is completed, and the program jumps to FIG. 3 using jump symbol A.

FIG. 3 is a flowchart of the latter half of the operation of the copy task according to the present invention.

In S7, the data in the area indicated by the address obtained in S5 is read from the master disk. Next, in S8, the data read in S7 is written to the same address of the same file on the slave disk, and in S9, exclusive processing of the file is canceled. followed by S
In step 10, it is determined whether the data is finished or not by whether the address value to which the copy was performed is smaller than the end point address in S5 of FIG. Add the value of , jump to Figure 2 with the jump symbol B, perform the processing from S6 to S9 mentioned above, and make sure that the address value copied in S10 is the same value as the end point address of S5 in Figure 2. If so, it is determined that the data is complete, and the process proceeds to S12.
It is determined whether there is the next data identification or not, and if there is data identification, the data identification is set as the next data in S13,
Jump to FIG. 2 using jump symbol C and perform the processes from S5 to S9 described above. In this way, when it is determined in S12 that copying of data corresponding to all data identification has been completed, S1
In step 4, it is determined whether or not the date identification needs to be changed to the previous day, and if necessary, in step S15, the date identification is set one day earlier, jump to FIG. The processing from to S9 is performed. If it is determined in S14 that date identification is not necessary, the process ends at this point, and in S16, the system control task is notified of the end of the process, and the process of this copy task is ended.

[0014]

As explained above, the present invention provides a console for inputting a copy process startup command that specifies the disk containing target data and the number of days for the target data, and a copy process input by the console. A command analysis section that analyzes processing startup commands and confirms normality;
A system control unit receives the output of this command analysis unit, recognizes the content of the copy processing start command, and generates a copy task, and a copy task generated by the system control unit performs two operations.
While performing exclusive control over files in one disk, the address of the storage location of the data is determined from the disk that stores the data entered by the console and the number of days of the data. By having a configuration that includes a copy task section that copies the specified data from the master disk to the same file on the slave disk, the disk that stores the target data and the number of days of the target data can be specified. This has the effect of requiring only the minimum necessary load on the system.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention.

FIG. 2 is a flowchart of the first half of the operation of a copy task according to the present invention.

FIG. 3 is a flowchart of the second half of the operation of a copy task according to the present invention.

[Explanation of symbols]

1 Console 2 Command analysis section 3 System control section 4 Master disk 5 Slave disk 6 Copy task section

Claims (1)

[Claims] Claim 1: In a file copy method between dual disks that automatically records reports sent and received by an online information processing device, a disk storing target data and the number of days of the target data are specified. A console for inputting a copy processing start command, a command analysis section for analyzing the copy processing start command inputted by the console and confirming its normality, and a command analysis section for receiving the output of the command analysis section and recognizing the contents of the copy processing start command. a system control unit that generates a copy task; and a master disk that stores the target data input by the console while performing exclusive control of files in two disks by the copy task generated by the system control unit. The present invention is characterized by comprising a copy task unit that determines the address of the storage location of the data based on the number of days of the target data and copies the data specified by this address from the master disk to the same file in the slave disk. How to copy files between dual disks.