JP2891815B2 - Media name management method for loosely coupled systems - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to management of a medium name of a computer system, and more particularly to unified management of a non-shared medium and a shared medium in a loosely-coupled computer system.

[0002]

2. Description of the Related Art In a loosely-coupled computer system using a plurality of host computers, there are a medium shared by a plurality of host computers and a non-shared medium used only by each host computer.
In order to centrally manage these media in a loosely coupled computer system, a media management file created on a shared file has been used. In this case, duplicate media names registered in the media management file are not allowed through the loosely coupled system. Therefore, it is necessary to give a unique medium name through a loosely-coupled computer system even for a non-shared medium accessed only by each host computer.

[0003]

The problem to be solved is that when using a shared media management file,
The media name of the media to be managed must be unique throughout the loosely-coupled computer system, but the media name, such as system media, that exists in each host computer and must use a fixed media name as the system This is a point that must be changed for each host computer.

[0004]

SUMMARY OF THE INVENTION The present invention provides a shared medium connected to all host computers constituting a loosely coupled system and a non-shared medium solely connected to each host computer constituting a loosely coupled system. And a shared medium management file for centrally storing management information of shared media and non-shared media, and a host ID uniquely determined by each host computer. Therefore, according to the present invention, a medium name of a medium used as a shared medium is stored in a medium management file, and when a registration request for a medium is made, whether or not the medium is a shared medium is determined by referring to the shared medium management information. Is determined, and if the medium is a shared medium, a new conversion medium name is generated from the medium name and the host ID by a certain rule (for example, a host ID is added after the medium name), and the new medium is generated. A registration function that registers in the media management file by name and, if it is not a shared medium, a registration by using the medium name as it is. If it is a shared medium, convert the media name in the same way as the registration function, obtain the media information by referring to the media management file with the obtained new media name,
If the medium is not a shared medium, a reference function is provided to obtain the medium information by referring to the medium management file using the medium name as it is, and according to the medium information registration / reference request from the program, the medium is registered or the medium information is referenced. The feature is that it is configured to instruct.

[0005]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of a medium management system of a loosely coupled system according to the present invention.

[0006] The medium management system of the loosely coupled system of the present embodiment is composed of host computers 1 and 11, host IDs 2 and 12 set in each host computer, and media names realized in each host computer. Conversion means 3 and 13, medium access management means 4 and 14, medium management file 7 readable and writable by all host computers, shared medium 9 accessible by all host computers, and access only by respective host computers Possible non-shared media 8 and 10, consoles 5 and 15 for activating the media access management means to access the shared media or non-shared media, programs 6 and 16, and sharing in the media management file And the shared medium management information 17 holding the medium name of the medium 9.

[0007] The program 6 is started by an operator,
In order to obtain the medium information for accessing the shared medium 9 or the non-shared medium 8, the medium access management means 4 is started. The operator console is activated by the operator, and activates the medium access management 4 to obtain the medium information of the shared medium 9 or the non-shared medium 8. At this time, the console 5 or the program 6 sends the medium name to be accessed to the medium access management means 4.

[0008] The medium access management means 4 is activated from the console 5 or the program 6 to receive the medium name, activates the conversion means 9 and passes the medium name. Next, the medium access management means 4 obtains the medium management information obtained from the medium management file 7 by the conversion means 3 and returns the medium management information to the program 6 or the console 5. Next, the program 6 accesses the shared medium 9 or the non-shared medium 8 based on the medium management information received from the medium access management unit 4.
The console 5 displays the medium management information received from the medium access management means 4.

The conversion means 3 is activated by the medium access management means 4 and receives a medium name, for example, when a reference request for medium information is made. First, the conversion means 3 refers to the shared medium management information 17 in the medium management file 7 and It is determined whether the medium is the shared medium 9 or the non-shared medium 8. Next, when the target medium is the shared medium 9, the conversion means 3 searches the medium management file 7 with the received medium name. On the other hand, when the target medium is the non-shared medium 8, the converting means 3 sets the medium name and the host ID 2
Is a new media name that has been converted according to certain rules.
The medium management file 7 is searched. As a result, the conversion unit 3 reads the medium information, and returns the read medium information to the medium access management unit 4.

When registering the shared medium 9 in the medium management file 7, the medium name of the shared medium 9 is recorded in the shared medium management information 17. The host ID 2 is a unique 1-byte (8-bit) width number through the host computers 1 and 11 constituting the loosely coupled system, is determined when configuring the loosely coupled system, and is stored in each host computer.

The medium management file 7 is a shared file updated by the conversion means 3 and stores medium information (for example, medium protection information, used amount, etc.) on the shared medium 9 and the non-shared media 8, 10. The non-shared medium 8 is a medium that can be accessed only from the host computer 1, and the non-shared medium 10 is a medium that can be accessed only from the host computer 11. The shared medium 9 is a shared medium that can be accessed from both the host computers 1 and 11.

FIG. 2 is a flowchart showing the operation of the embodiment shown in FIG. FIG. 3 is an explanatory diagram showing the operation of the embodiment shown in FIG. Next, with reference to the flowchart shown in FIG. 2 and the description of the operation shown in FIG. 3, an embodiment of a procedure in which the conversion unit 3 converts the medium name will be described. First, the conversion means 3 determines in step 22 that the medium access management means 4
Is determined in the shared medium management information 17 in the medium management file 7, and if the target medium name is registered, it is determined that the target medium is a shared medium. As a result of the determination, if the target medium is a shared medium, the process proceeds to step 27 in step 24, and if the target medium is a non-shared medium, the process proceeds to step 25 in the same step.
Next, the conversion means 3 acquires the host ID 2 stored for each host computer in step 25.
Subsequently, the conversion means 3 executes step 2
The medium name is converted based on the host ID obtained in step 5.

Here, a method of converting a medium name will be described with reference to FIG. In the example of FIG. 3, the medium name is given by a character, "MEDIA", and the host ID is "01".
X (hexadecimal). The host ID is added after the last character of the medium name. When this is represented by the EBCDIC character code, “D4C5C4C9C1” X is changed to “D4C5C4
In step 27, the conversion means 3 searches the medium management file 7 using the medium name of the target medium or the converted new medium name, and obtains the medium information of the target medium.

According to the above procedure, the user of each host computer does not need to be aware of the name of the medium converted and stored in the medium management file 7. The above description is about the procedure for obtaining the medium information, but the medium name of the non-shared medium is also changed when the medium information is registered or the medium management file 7 is accessed when the medium information is changed. This provides a consistent procedure.

[0015]

According to the present invention, when a medium management file is shared in a loosely coupled system, the same medium name can be given to a non-shared medium connected to each host computer. is there.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a medium management system of a loosely coupled system according to the present invention.

FIG. 2 is a flowchart for explaining the operation of the embodiment shown in FIG. 1;

FIG. 3 is an explanatory diagram for explaining the operation of the embodiment shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Host computer 2 Host ID 3 Conversion means 4 Medium access management means 5 Operator console 6 Program 7 Medium management file 8 Non-shared medium 9 Shared medium 10 Non-shared medium 11 Host computer 12 Host ID 13 Conversion means 14 Medium access management means 15 Operation Desk 16 program 17 shared medium management information 21-28 processing steps

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-340140 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G06F 15/16 370 G06F 13/14 310

Claims (3)

(57) [Claims] A host ID uniquely determined,
Including a conversion unit and a medium access management unit for performing registration and reference, a plurality of host computers constituting a loosely coupled system, a shared medium connected to all of the plurality of host computers constituting the loosely coupled system, A medium of a loosely coupled system comprising: a plurality of non-shared media independently connected to respective host computers constituting a loosely coupled system; and a shared medium management file for centrally storing management information of the medium. Name management method. 2. The conversion means included in the host computer provides shared medium management information for holding a medium name of a medium used as a shared medium in the medium management file. It is determined whether or not the medium is a shared medium by referring to the shared medium management information. If the medium is a shared medium, a new conversion medium name is generated from the medium name and the host ID according to a certain rule, and the new converted medium is generated. A registration function for registering in the management file with a medium name medium and registering with the medium name as it is when the medium is not the shared medium; and when requesting reference to medium information, referencing the shared medium management information to the shared medium. It is determined whether or not the medium is a shared medium, the medium name is converted in the same manner as in the registration function, and the medium information is obtained by referring to the medium management file with the obtained new medium name. , If not a medium, the medium name management method of loosely coupled system of claim 1, and a reference function to obtain the medium information by referring to the media management file by intact media name. 3. The medium access management means included in the host computer instructs the conversion means to register a medium or refer to the medium information in accordance with a medium information registration / reference request from a program. 2. A medium name management system for a loosely coupled system according to claim 1, wherein