JPH05158760A - Migration processing system - Google Patents

Abstract

PURPOSE:To shorten time required for the migration processing. CONSTITUTION:To secure the space capacity received by a command processing part 20 as an idle space on a disk, a directory research part 40 searches all directories 10 to deliver the file information corresponding to each terminal node to a sort record preparation part 50. Upon receiving it, an unused days processing part 51 rounds the number of days not using the file by the constant number, and a record edition part 52 prepares a sort record by taking the unused days and the file size as a key to be outputted to a sort work file 80. After the sort processing of a sort processing part 60, a record input part 71 inputs record one by one and a data transfer part 72 reads the content of the file from the disk to be written in a migration medium 90.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a migration processing method for managing storage, and more particularly to a migration processing method for transferring user files that have not been used for a long time to a cheaper storage medium.

[0002]

2. Description of the Related Art Conventionally, a migration processing method that performs a storage management method is a file that has not been used for a long time as a migration target file
Or select the file with the least access frequency,
The migration process continued until a certain file space became available.

Alternatively, all the files that have not been used for a predetermined period of time or all of the files that are less frequently accessed than a predetermined frequency have been migrated.

[0004]

By the way, in the above-mentioned conventional migration processing method, since the size of the file to be migrated is not taken into consideration, many files having a small file space may have to be migrated. There was a problem that it took time to open a certain file space.

The present invention has been made in view of the above problems, and an object thereof is to provide a migration processing method in which the migration processing is shortened in consideration of the file size.

[0006]

In order to achieve the above object, the migration processing method of the present invention transfers a user file, which is on a large-capacity disk device and has not been used for a long time, to a cheaper medium. In the migration processing method, a command processing unit that inputs the amount of space to be migrated to start the migration process, a directory search unit that searches a directory in the system to extract migration candidate files, and the extracted directory From the unused days processing part that rounds the unused days with a constant, and the sort record in which the unused days created above and the file size of the corresponding file are used as the first key and the second key, respectively, and further have a directory address item. And the record editor that creates A record output unit that outputs the sorted records to a sort work file, a sort processing unit that performs sorting using the sort work file, and a record input unit that inputs the sort records one by one after the sort process is completed. , A data transfer unit that performs a process of inputting the corresponding file indicated by the sort record from the disk device and transferring it to the migration medium until the amount of space given by the command processing unit is reached.

[0007]

According to the migration processing system having the above configuration, the directory search unit searches all directories and newly secures the space capacity newly received by the command processing unit as a free space on the disk device. Information on the file corresponding to the node is passed to the sort record creation unit. In response to this, the unused days processing unit rounds the unused days of the file by a fixed number, and the record editing unit creates sort records using the unused days and the file size as keys and outputs them to the sort work file. After the sorting process of the sort processing unit, the record input unit inputs records one by one, and the data transfer unit reads the file contents from the disk device and writes them in the migration medium.

As a result, by preferentially migrating a file having a long unused period and a large file capacity, the migration process can be completed more quickly.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing components of a migration processing method according to an embodiment of the present invention,
FIG. 2 is a diagram showing the format of the sort record, and FIG. 3 shows a schematic flow of the processing.

In FIG. 1, reference numeral 10 denotes a directory existing in the disk device, and the user file space is also managed by this directory. Two
Reference numeral 0 denotes a command processing unit that inputs a migration start instruction from the console or a user program and a file space capacity to be freed by the migration process, and inputs the amount of space to be migrated to start the migration process.

Reference numeral 30 denotes a migration processing section. In the migration processing unit 30, 40 is a directory search unit that sequentially searches the directory 10 to search for files that are candidates for migration, and 50 is
This is a sort record creation unit that creates sort records for determining the priority of migration candidate files.

In the sort record creating section 50, 51
Processes the number of unused days in the file and determines a constant (7 days or 1
An unused days processing unit that rounds to 0 days, etc., and a record editing unit 52 that sets predetermined data items in a sort record, and indicates the unused days created by the above process and the file size of the corresponding file, respectively. A sort record is created in which the items of the directory address are further provided as the 1st key and the 2nd key. Reference numeral 53 is a record output unit that outputs a sort record to a sort work file 80 described later.

Reference numeral 60 denotes a sort processing unit included in the migration processing unit 30 for performing a known sort process for performing a sort using the sort work file 80. 7
0 is included in the migration processing unit 30, determines a file to be migrated, and transfers a user file in the disk device to a migration medium 90 described later, 71 is included in the file transfer unit 70,
A record input unit for inputting sort records one by one from the sort work file 80, and 72 a file transfer unit 70
And a command transfer unit 20 that is a data transfer unit that transfers the contents of the user file to the migration medium 90 and that transfers the corresponding file indicated by the sort record from the disk device to the migration medium. Repeat until the amount of space given is reached.

Reference numeral 80 denotes a sort work file which also serves as an input / output / work file for sort processing, and 90 denotes a migration medium composed of a magnetic tape, a magnetic disk device or the like.

In FIG. 2, 100 is a record editing section 5.
The format of the sort record created by No. 2 is shown.

Next, the operation of this embodiment will be described with reference to FIGS. 1, 2 and 3.

First, in step 200, the command processing unit 2
0 waits for a migration start instruction and a file space capacity (hereinafter abbreviated as “requested space capacity”) to be freed in the migration process from an arbitrary input device such as a console or a user program.

When a command is input, the command processing unit 2
0 transfers control to the migration processing unit 30 together with the required space capacity.

Next, in step 210, the directory search unit 40 sequentially searches the directory 10 in the disk device to obtain one piece of information of each node. Since the directory search method is not related to the present patent, a publicly known method is used without mentioning it.

In step 220, it is judged whether or not all directories have been searched, and if all directories have been searched, step 270 is proceeded to, and if all directories have not been searched, step 230 is proceeded to.

In step 230, if one directory obtained in step 220 is an intermediate directory, the process returns to step 210 to obtain the next directory.

If the obtained directory is a file, the process proceeds to step 240, where the unused days processing unit 51 obtains the number of unused days from the latest reference date and the current date in the directory, and further sets this number of days to a predetermined number. (For example, 7 is used for weekly units, and 30 is used for monthly units. The system determines this in advance.)

In step 250, the record editing unit 52 uses the number of unused days as the first key, obtains the file size from the corresponding directory and uses this as the second key, and further sets the address in the disk device in which the corresponding directory exists to 1 Create a sort record added as an item. As a result, a format such as 100 in FIG. 2 is obtained.

In step 260, the record output unit 53 outputs the sort record created in step 250 to the sort work file 80. This file becomes a migration candidate file. Proceed to step 210 to search for the next file, and repeat the same processing.

Among them, in step 220, it is determined that the directory search is completed, and the process proceeds to step 270.

In step 270, the sort processing unit 60 uses the sort work file 80 to sort the sort records. As a result, the sorted records are grouped into several types according to the number of unused days, sorted in descending order of unused days, and further sorted in descending order of file size for each group.

Next, in step 280, the record input unit 7
1 is 1 sort record from sort work file 80
Enter the item.

In step 290, the data transfer section 72 obtains the corresponding directory from the directory 10 using the directory address in the sort record.

At step 300, the address of the disk device where the file exists is obtained from the information of the corresponding directory, and the contents of the file are read.

Subsequently, the contents of the file read in step 310 are written in the migration medium 90.

Further, in step 320, the file space of the corresponding file is released. The total value of the released space amount is sequentially accumulated in a predetermined area of the data transfer unit 72.

At step 330, the required space capacity input at step 200 is compared with the total value of the released space amount, and if the required space capacity is not yet released, the process returns to step 280 and the same processing is performed. repeat. If the requested space capacity has been released, the migration process ends.

From the above description, files having substantially the same unused days are targeted for migration in order of increasing file size.

[0034]

As described above, according to the migration processing method of the present invention, during storage management, if the number of unused days of files is almost the same, migration is performed in descending order of file size. Finish faster. As a result, when there is no space on the disk device and you want to make space for the migration process and secure space on the disk device,
This has the effect of shortening the work interruption time and increasing the work efficiency.

[Brief description of drawings]

FIG. 1 is a block diagram showing a migration processing method according to an embodiment of the present invention.

FIG. 2 is a diagram showing a format of a sort record.

FIG. 3 is a flowchart showing an outline of processing of a migration processing method according to the embodiment.

[Explanation of symbols]

 10 directory 20 command processing unit 30 migration processing unit 40 directory search unit 50 sort record creation unit 51 unused days processing unit 52 record editing unit 53 record output unit 60 sort processing unit 70 file transfer unit 71 record input unit 72 data transfer unit 80 Sort work file 90 Migration medium 100 Sort record format

Claims (1)

[Claims] 1. A migration processing method for transferring a user file, which has not been used for a long period of time, to a medium with a lower price on a large-capacity disk device, and inputs the amount of space to be migrated to perform the migration processing. A command processing unit to start, a directory search unit that searches a directory in the system to extract migration candidate files, an unused days processing unit that rounds unused days by a constant from the extracted directory, and the above created A record editing unit that creates a sort record having the number of unused days and the file size of the corresponding file as the first key and the second key, respectively, and a directory address item, and the created sort record in a sort work file. The record output section for outputting, and After the sort processing section and the sorting process section that performs sorting using the sort work file,
A record input part for inputting one sort record at a time,
A migration process comprising: a data transfer unit that performs a process of inputting a corresponding file indicated by the sort record from a disk device and transferring the file to a migration medium until a space amount given by the command processing unit is reached. method.