JPH05181730A - Volume access environment managing system - Google Patents

Abstract

PURPOSE:To automatically access a file without requiring an operator by automatically recovering an access environment in accordance with the processing of an access environment recovering part and an access environment forming part. CONSTITUTION:In an access disabled state that a storage device is disconnected though an access environment for a corresponding volume exists when an access is requested from a file access requesting source, an access environment recovering part 14 recovers the access environment, and when the volume concerned exists because the storage is connected though the access environment of the volume does not exist at the time of accessing the volume, an access environment forming part 15 forms the access environment of the volume.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a volume access in a data processing apparatus having a structure for acquiring an access environment of a volume in which a file exists and executing an access process to a requested file according to the acquired access environment. The present invention relates to an environment management method, and more particularly, to a volume access environment management method that enables access to a file automatically expanded in a storage device even when the failed storage device is restored, without operator intervention. Is.

In a data processor, when a failure occurs in a storage device such as a disk during system operation, the failed storage device is removed to remove the failure. When the removal of the failure is completed, the storage device is removed. Will be incorporated into the data processing device again. When recovering a storage device that has recovered from such a failure, it is necessary to make it possible to automatically access the files expanded in the volume stored in the recovered storage device without the operator's intervention. is there.

[0003]

2. Description of the Related Art Conventionally, when a failed storage device is incorporated into a data processing device again, an operator issues a command to access a volume created before the failure according to this command. By discarding the environment and recreating a new access environment, it has become possible to access the files expanded in the volume stored in the restored storage device.

[0004]

However, according to such a conventional technique, the operator must issue a command in order to incorporate the faulty storage device into the data processing device so that it can be used again. You have to do it. Therefore, such a conventional technique has a problem that a large load is imposed on the operator when the failed storage device is incorporated into the data processing device again.

The present invention has been made in view of the above circumstances, and a data processing apparatus for acquiring an access environment of a volume in which a file exists and executing an access process to a requested file according to the acquired access environment. In order to provide a new volume access environment management method that enables access to files automatically expanded in a storage device without operator intervention even when the storage device in which a failure has occurred is restored. To do.

[0006]

FIG. 1 illustrates the principle configuration of the present invention. In the figure, 1 is a data processing device configured according to the present invention, and 2 is a plurality of storage devices such as disks included in the data processing device 1.

Reference numeral 10 denotes a path name resolution unit provided in the data processing device 1, which issues an access request for file information expanded in a volume stored in the storage device 2,
A file management unit 11 included in the data processing device 1 manages an access environment of a volume stored in the storage device 2 and, when an access request is issued from the path name resolution unit 10, corresponds to the access environment. The volume information is read out, and the file of the requested file is acquired by tracing the file of the volume and notified to the path name resolution unit 10.

The file management unit 11 reads the corresponding volume from the storage device 2 according to the access environment management unit 12 that manages the access environment of the volume and the access environment managed by the access environment management unit 12, and the file of the volume. A file information acquisition unit 13 that acquires the file information of the requested file by tracing
An access environment collection unit 14 that dynamically collects the access environment managed by the access environment management unit 12 and an access environment creation unit 15 that dynamically creates the access environment managed by the access environment management unit 12.

[0009]

In the present invention, when there is an access request from the path name resolution unit 10, the file information acquisition unit 13 follows the access environment managed by the access environment management unit 12.
The volume information is read from the corresponding volume and the file of the volume is traced to acquire the file information of the requested file and notify the path name resolution unit 10. While this file access process is being executed, the access environment recovery unit 14 determines that the access environment of the volume corresponding to the access environment management unit 12 exists, but the storage device 2
If the access environment management unit 1 detects that it is in an inaccessible state due to disconnection due to failure
The process of collecting the access environment from 2 is executed. On the other hand, the access environment creation unit 15 includes the access environment management unit 1
If the access environment of the volume corresponding to No. 2 does not exist, but the presence of the volume is detected by the restoration of the storage device 2, the process of creating the access environment of the volume and registering it in the access environment management unit 12 is executed. ..

As described above, according to the present invention, according to the processing of the access environment collecting section 14 and the access environment creating section 15,
Since the access environment is dynamically collected and created, the storage device in which the failure has been recovered can be incorporated into the data processing device 1 again without requiring the operation of the operator.

[0011]

EXAMPLES The present invention will be described in detail below with reference to examples. As shown in FIG. 2, the file management unit 11 described with reference to FIG. 1 has two functions, an IOS function and a FILE function. Here, the symbol “Δ” described in the volume represents a directory, and the symbol “◯” represents a file other than the directory. Further, in this figure, it is assumed that a file "/ x / y / z" is accessed.

This IOS function detects the connection / disconnection processing of the storage device 2 and, when the storage device 2 is connected, refers to the specified specific area of the storage device 2, thereby The volume name stored in the storage device 2 is specified, and the recognition process of the volume existing in the storage device 2 is executed. By this processing, an access environment is obtained that indicates which volume is stored in which address position of which storage device 2. Then, in addition to these processing functions, a specific access process to the volume stored in the storage device 2 is executed.

On the other hand, the FILE function executes a process for identifying which file exists in which volume, and manages the access environment of the volume provided by the IOS function, so that the path name explained in FIG. When the file name of the access request is received from the resolution unit 10, processing is performed so that the corresponding volume can be quickly read. Then, in addition to these processing functions, a dynamic management process of the volume access environment provided by the IOS function is executed.

FIGS. 3 and 4 show an embodiment of a processing flow executed by the FILE function of the file management section 11 shown in FIG. Next, the processing of the present invention will be described in detail according to this processing flow.

When the path name resolution unit 10 described with reference to FIG. 1 receives a path name from an application program (not shown) or the like, it uses the FILE function of the file management unit 11 to
Executes path name resolution processing up to the request file. That is, as shown in the processing flow of FIG. 3, first, in step 1, it is determined whether or not the end of the path name described in the request file has been reached, that is, whether or not the request file has been reached. If it is determined that the volume does not reach, the volume in which the file having the path name at that time exists is specified and the access environment of the volume is acquired in the next step 2. The access environment acquisition process executed in step 2 will be described in detail later with reference to the process flow of FIG.

Then, in step 3, it is judged whether or not the access environment of the volume has been acquired by the processing of step 2. When it is determined in step 3 that the volume access environment cannot be acquired, the process proceeds to step 5 and the FIL of the file management unit 11 is determined.
The E function notifies the path name resolution unit 10 that the volume does not exist. In this way, when the storage device 2 is disconnected due to a failure in the storage device 2, the path name resolution unit 10 is executed according to the processing of step 5.
Will be notified that the volume no longer exists. On the other hand, when it is determined in step 3 that the volume access environment has been acquired,
Go to step 4 and follow the access environment IOS
A volume access request is issued to the function, and the volume returned in response to this issuance request is accessed to trace the directory. If the requested file cannot be reached, the volume where the next directory exists Is obtained and the process is returned to step 1.

In this way, the path name resolution unit 10 uses the FILE function of the file management unit 11 to execute the processes of Steps 1 to 4 to determine the directories to be expanded in one or a plurality of volumes. To follow.
Then, when it is determined that the end of the path name described in the request file has been reached according to the processing of step 1, the process proceeds to step 6 and the notification of the file information of the request file is received from the FILE function of the file management unit 11. To process.

Next, the process of acquiring the access environment of the volume, which is executed in step 2 of the process flow of FIG. 3, will be described in detail according to the process flow of FIG. As described below, the FILE function of the file management unit 11 of the present invention is
A feature of the present invention is that, unlike the prior art, the volume access environment is dynamically managed.

As shown in the processing flow of FIG. 4, the FILE function of the file management unit 11 is firstly step 2
At 0, it is determined whether or not an access environment of the corresponding volume exists in its own function. If it is determined in step 20 that the access environment of the corresponding volume exists, the process proceeds to step 21 and a volume access request is issued to the IOS function according to the access environment. Determine whether access is possible. Then, if it is determined in step 21 that the access is impossible, the existing access environment is meaningless because the storage device 2 is disconnected. Proceeding to step 22, the access environment of the volume is collected and the process returns to step 20. On the other hand, when it is determined in step 21 that access is possible, the process proceeds to step 23, and the access function of the volume is notified to the processing function of step 3 in the processing flow of FIG.

In this way, the FILE function of the file management unit 11 of the present invention dynamically collects the access environment for the volume stored in the storage device 2 which is separated due to the occurrence of a failure. To do.

On the other hand, in the judgment of step 20,
When it is determined that the access environment of the corresponding volume does not exist, the process proceeds to step 24, and the IOS function is inquired whether the volume exists.
Then, when it is judged from the inquiry in step 24 that the volume exists, the process proceeds to step 25 in response to the fact that the volume exists when the storage device 2 in which the failure has been recovered is connected. , IOS
The access environment is obtained by issuing a request to create the access environment of the volume to the function, and the access environment of the volume is obtained for the processing function of step 3 of the processing flow of FIG. Will be notified. On the other hand, if it is determined by the inquiry in step 24 that the volume does not exist, the process proceeds to step 26, and the processing function of step 3 in the processing flow of FIG. 3 is notified that the volume does not exist.

In this way, the FILE function of the file management unit 11 of the present invention dynamically acquires the access environment of the volume stored in the storage device 2 when the storage device 2 in which the failure is recovered is connected. It is processed as it is done.

[0023]

As described above, according to the present invention,
In a data processing device that acquires an access environment of a volume in which a file exists and executes access processing to a requested file according to the acquired access environment,
Even when the failed storage device is restored, it becomes possible to automatically access the files expanded in the storage device without operator intervention.

[Brief description of drawings]

FIG. 1 is a principle configuration diagram of the present invention.

FIG. 2 is a detailed configuration diagram of a file management unit.

FIG. 3 is an example of a processing flow executed by a path name resolution unit.

FIG. 4 is an example of a processing flow executed by a FILE function.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Data processing device 2 Storage device 10 Path name resolution part 11 File management part 12 Access environment management part 13 File information acquisition part 14 Access environment collection part 15 Access environment creation part

Claims (1)

[Claims] 1. A data processing apparatus that acquires an access environment of a volume in which a file exists and executes access processing to a requested file according to the acquired access environment, when an access request is issued from a file access request source. The access environment recovery unit (14) recovers the access environment when the access environment of the corresponding volume exists but is inaccessible because the storage device is disconnected, and the access request from the file access request source. If there is no access environment for the corresponding volume, but the volume exists because the storage device is connected, an access environment creating unit (15) for creating the access environment for the volume is provided. The access environment collection unit (14) and the access environment creation unit
By managing the access environment dynamically according to (15),
A volume access environment management method characterized in that it is configured so that even when a failed storage device is restored, it is possible to automatically access a file that is expanded in the storage device.