JPS6267629A - File rearranging device - Google Patents

Abstract

PURPOSE:To rearrange files quickly and accurately and to reduce the average seek operation range of a disc head by executing saving, reallocating, copying, etc. of files through a monitor program and a file rearranging program. CONSTITUTION:A monitor program 4 counts the number of times of physical input/output for a certain time of each file stored in a magnetic disc device 8 and sets the counted value to an input/output count table 3 with a prescribed format. When the measurement object time elapses, the program 4 stops counting and reports it to a terminal equipment 10 and instructs a file rearranging program 5 to start the file rearranging processing. The program 5 sorts files in the order of the number of times of physical input/output and allocates and copies files from the device 8 to a magnetic disc device 9 for saving and reallocates files on the devices 8 in the order of the number of times of physical input/output. Files are copied from the device 9 to the device 8 in file units.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a file relocation device.

[Conventional technology]

Conventionally, in order to reduce the average seek operation range of the disk head, relocation of files on a magnetic disk device requires manual efforts such as file evacuation, file reallocation, and file relocation.
Work such as file copying was performed, and measurement data of the number of physical inputs and outputs for each file, which is a reference for determining the physical location of each file on the magnetic disk device, was not collected.

[Problem that the invention seeks to solve]

The conventional relocation method described above has the following problems. That is, (1) Since the work is done manually, errors may occur.

(2) Since the work is done manually, the number of man-hours required is high.

(3) The physical location of each file on the magnetic disk device after file relocation is not based on data measuring the input/output frequency for each file, so the file location after relocation is not necessarily the average of the disk heads. There were problems such as the fact that the operating range could not be said to be small.

The present invention provides a file relocation device that solves the above problems.

[Means for solving problems]

The file relocation device of the present invention includes means for a monitor program to record the number of physical inputs and outputs for each file managed on a magnetic disk device in a table on a memory device, means for sorting each file in descending order of number of inputs and outputs, means for storing each file in an evacuation area on an external storage device, and a magnetic disk device before evacuation in which all files in the evacuation area are sorted in descending order of input/output based on the sorting results. By reallocating and copying while physically adjacent to the area above,
The present invention is characterized by having means for arranging files so as to reduce the average seek operation range of the disk head.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a file relocation system according to an embodiment of the present invention. The main computer system consists of an IFi memory device 2, a central processing unit 6, and a peripheral device control device 7, and the memory device 2 has an input/output count table 3 that records the physical input/output number of each file, a monitor program 4, and files. Relocation program 5 is stored. In addition, the peripheral device control device 7 includes a magnetic disk device 8 that is the target of file relocation, a magnetic disk device 9 for saving each file when file relocation processing is executed, and a file relocation processing program 5. A terminal device 10 that issues an instruction to start relocation processing is connected. Figure 2 is the format of input/output count table 3)
shows.

In the embodiment, the file relocation process of the present invention is performed as follows.

That is, the monitor program 4 counts the number of physical inputs and outputs for each file stored in the magnetic disk device 8 that is the target of file relocation in a certain period of time, and creates an input/output count table 3 in the format shown in FIG.
Set the physical input/output count to ・Monitor program 4
When the measurement target time elapses, the physical input/output count is stopped and the terminal device 10 is notified of the end of the measurement. When the operator receives the measurement completion notification, the operator uses the terminal device 10 to instruct the file relocation program 5 stored in the memory device 2 to start file relocation processing. Next, the file relocation program 5 converts the contents of the input/output count table 3 that records the number of physical input/outputs to each file into the file name F of each file.
The number of physical input/outputs It(
i=1 to n), the sorting process is performed in descending order of the number of physical input/outputs. Next, the file relocation program 5 performs file allocation/copying processing on the magnetic disk device 8 that is the object of file relocation, and on the magnetic disk device 9 for saving all files for each file. In this process,
Each file is placed in the file saving magnetic disk device 9 in the same physical order as the magnetic disk device 8 to which the file is to be relocated.

Next, the file relocation program 5 refers to the input/output count table 3 and selects each file in the order of the number of physical input/outputs to the magnetic disk device 8 that is the target of file relocation.
Re-allocation) k is performed. In this process, each file is allocated in the order of the number of physical input/outputs while making the files adjacent to each other so that the seek distance is the shortest.

Finally, the file relocation program 5 copies each file from the file saving magnetic disk device 9 to the magnetic disk device 8 that is the target of all file relocation.

〔Effect of the invention〕

As explained above, the present invention requires less manual intervention, so
All files on the magnetic disk can be quickly and accurately relocated, and all files can be relocated according to the frequency of input/output for each file, so the application program can perform input/output operations on each file after the relocation. This has the effect of reducing the average seek operation range of the disk head according to instructions.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a file relocation system showing an embodiment of the present invention, and FIG. 2 is a diagram showing the format of a table for recording the number of physical inputs and outputs for each file shown in FIG. DESCRIPTION OF SYMBOLS 1... Computer system body, 2... Memory device, 3... Input/output count table, 4... Monitor program, 5... File relocation program, 6...
...Central processing unit, 7...Peripheral device control device, 8...
・Magnetic disk device subject to file relocation, 9.
. . . Magnetic disk device for file saving, 10 . . . Terminal device. 9I 笈 (1≦shi≦7'L)

Claims (1)

[Claims] (1) means for a monitor program to record the number of physical input/outputs for each file managed on a magnetic disk device in a table on a memory device; means for sorting, means for storing each file in an evacuation area on an external storage device, and storing each file in the evacuation area on a magnetic disk device before evacuation in order of the number of input/outputs based on the sorting processing result; A file relocation device comprising means for arranging files so as to reduce the average seek operation range of a disk head by reallocating and copying files while physically adjoining the area.