JPH05108442A - Master file reference system - Google Patents

Abstract

PURPOSE:To shorten the operation time of a computer system for processing a prescribed amount of data and to effectively utilize a resource (external storage device or the like). CONSTITUTION:A master file IO request processing part 22 refers to a request destination resource judgement information table 23, obtains a normal time request destination resource number corresponding to request data distribution information in request data and issues an 10 request to a master file IO processing part 4-1 or 4-2 having the normal time request destination resource number. When the fault of a master file 6-1 or 6-2 corresponding to the master file IL processing part 4-1 or 4-2 which has connection to the IO request is recognized, a master file IO request processing part 22 refers to a request destination resource judgement information table 23, obtains a fault time request destination resource number corresponding to request data distribution information in concerned request data and issues the IO request to the master file IO processing part 4-1 or 4-2 having the fault time request destination resource number.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a master file reference system in a computer system for performing data processing by referring to a master file on an external storage device such as a magnetic disk.

[0002]

2. Description of the Related Art Conventionally, in this type of master file reference method, when the master file is not multiplexed,
When a master file failed, data processing was interrupted until the master file recovery processing was completed.

When the master files are multiplexed (when a plurality of master files having the same contents are provided), the standby master files are used when the active master files are normal ( The backup master file was not used effectively as a resource.

[0004]

In the above-mentioned conventional master file reference method, if the master file is not multiplexed, the data processing must be interrupted when the master file fails (for restarting the data processing). Has to wait for the recovery of the master file), so there was a drawback that the operating time of the computer system for processing a certain amount of data becomes long.

When the master files are multiplexed, the standby master file is not used when the working master file is normal, so there is a problem in terms of cost performance in the computer system (identical. The high cost is required to process the data).

In view of the above points, an object of the present invention is to shorten the operating time of a computer system for processing a certain amount of data (promptly reduce the failure of a master file that has been multiplexed). It is possible to operate), and to provide a master file reference method that enables effective use of resources.

[0007]

The master file reference method of the present invention corresponds to one of a plurality of master files having the same contents in a one-to-one correspondence in a computer system which performs data processing by referring to the master file. A master file IO processing unit that reads data in the master file, a request destination resource determination information table that stores correspondence between request data distribution information, a normal request destination resource number, and a failure request destination resource number, The normal request destination resource number corresponding to the request data distribution information in the request data is acquired by referring to the request destination resource judgment information table, and the master file IO processing unit having the normal request destination resource number I
When the O request is issued and the failure of the master file corresponding to the master file IO processing unit related to the IO request is recognized, the request destination resource determination information table is referred to and the request data distribution information in the request data is set. A master file IO request processing unit that acquires a corresponding failure request destination resource number and issues an IO request to the master file IO processing unit having the failure request destination resource number.

[0008]

According to the master file reference method of the present invention, the master file IO processing unit reads the data in the master file in a one-to-one correspondence with one of a plurality of master files having the same contents, and requests the resource decision information. The table stores the correspondence between the request data distribution information, the normal request destination resource number, and the failure request destination resource number, and the master file IO request processing unit refers to the request destination resource determination information table to request data in the request data. A normal request destination resource number corresponding to the distribution information is acquired, and an IO request is issued to the master file IO processing unit having the normal request destination resource number
When a failure of the master file corresponding to the master file IO processing unit related to the request is recognized, the request destination resource determination information table is referred to and the failure request destination resource number corresponding to the request data distribution information in the request data is set. It acquires and issues an IO request to the master file IO processing unit having the requested resource number at the time of failure.

[0009]

The present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the master file reference system of the present invention. The master file reference method of this embodiment is the queuing file 1
, The data processing unit 2, and the data file IO (Inpu
t Output. (Input / output) processing unit 3, master file IO processing units 4-1 and 4-2, and data file 5
And master files 6-1 and 6-2 (master file 6-1 and master file 6-2 have the same contents). In the following description, when any one of the multiplexed master file 6-1 and master file 6-2 is shown, it is expressed as “master file 6” (master file I
The same applies to the O processing units 4-1 and 4-2). In addition,
Needless to say, the mode of multiplexing the master file 6 is not limited to "duplication" as in this embodiment.

The data processing unit 2 includes a data processing execution unit 21.
A master file IO request processing unit 22 and a request destination resource determination information table 23. A plurality of data processing units 2 may exist in a computer system to which the master file reference method of this embodiment is applied.

FIG. 2 is a block diagram showing the data processing unit 2 in detail.

The data processing execution unit 21 in the data processing unit 2
Includes a data file I including a station address part, a data number part, and a data file read buffer.
Master file I consisting of O request structure 211, station address part, master file read key code part, master file read buffer and completion code part
The O request structure 212 and the O request structure 212 are generated (these structures are not limited to be generated in the data processing execution unit 21 and may be generated in another area). The station address set in the station address section issues the request data registered in the queuing file 1 (data having a station address and a data number and requesting data processing including reference to the master file 6). Identification information indicating the original terminal,
This is a type of request data distribution information for realizing IO distribution for the master file 6.

The request destination resource determination information table 23 is composed of a station address portion 231, a normal request destination resource number portion 232, and a fault request destination resource number portion 233 (a type of request data distribution information). It stores the correspondence between a certain station address, normal request destination resource number, and fault request destination resource number). "100" in the normal request destination resource number section 232 and the failure request destination resource number section 233 in FIG. 2 is identification information (resource number) indicating the master file IO processing section 4-1.
“0” is identification information (resource number) indicating the master file IO processing unit 4-2.

Next, the operation of the master file reference method of this embodiment having the above-mentioned configuration will be described.

In the computer system to which the master file reference method of this embodiment is applied, data is read from the data file 5 based on the request data registered in the queuing file 1, and the data and the above-mentioned request are read. It is assumed that data processing is performed in which the data in the master file 6 is read (referenced) based on the data.

The data processing execution unit 21 in the data processing unit 2
Is the data corresponding to the request data, which is obtained from the queuing file 1 in which some request data (in this embodiment, request data is issued from a plurality of terminals) are registered. The file IO request structure 211 is generated in the area of the data processing execution unit 21 (see FIG. 2), and the station address and data in the request data are stored in the station address part and the data number part in the data file IO request structure 211. A number is set, the address of the data file IO request structure 211 (address indicating the position in the data processing execution unit 21) is notified to the data file IO processing unit 3, and the data file 5 is sent to the data file IO processing unit 3 from the data file 5. To read the data (refer to the data file 5).

In response to this request, the data file IO processing unit 3 reads the data corresponding to the data file read buffer in the data file IO request structure 211 from the data file 5.

Next, the data processing execution unit 21 generates a master file IO request structure 212 in the area of the data processing execution unit 21 (see FIG. 2), and a data read buffer in the data file IO request structure 211. The master file read key code (information that uniquely determines the data storage position in the master file 6) in the data in the master file is taken out and set in the master file read key code part in the master file IO request structure 212, and the master file IO
The station address in the station address part in the data file IO request structure 211 is set in the station address part in the request structure 212, and the master file IO request processing part 22 is notified of the address of the master file IO request structure 212. The master file IO request processing unit 22 is requested to read data from the master file 6 (refer to the master file 6).

The master file IO request processing section 22 searches the station address section 231 in the request destination resource judgment information table 23 in which the station address in the station address section in the master file IO request structure 212 is set, and A normal time request destination resource number in the normal time request destination resource number section 232 corresponding to the station address section 231 is acquired, and a master file read key code is issued to the master file IO processing section 4 having the normal time request destination resource number. And the address of the master file read buffer, and issues a request to refer to the master file 6. For example, if the station address is "0"
, The corresponding normal request destination resource number is "1".
00 ”from the request destination resource determination information table 23, and the master file 6 for the master file IO processing unit 4-1 having the normal request destination resource number“ 100 ”is acquired.
Issue a -1 reference request.

Upon receipt of this request, the master file IO processing unit 4 transfers the corresponding data (data of the area specified by the notified master file read key code) from the master file 6 corresponding to the master file IO.
Read to the master file read buffer in the request structure 212.

Further, the master file IO processing unit 4 is
A completion code indicating whether or not the reading is normally completed is set in the completion code part in the master file IO request structure 212, and the master file IO request processing part 22 is notified of the end of the reading (reference).

Master file IO which received this end notification
The request processing unit 22 uses the master file IO request structure 21.
When the completion code in the completion code section in 2 is “normal” or “no corresponding record”, control is returned to the data processing section 2 (after this, for example, the data in the data file read buffer and the master). The process of comparing with the data in the file read buffer is performed by the data processing unit 2).

The master file I which received the above-mentioned end notification
The O request processing unit 22 uses the master file IO request structure 2
When the completion code in the completion code section in 12 is “failure” (when the completion code of “failure” is notified from the master file IO processing section 4), the failure of the master file 6 is recognized and Perform IO processing. That is, the station address part 231 in the request destination resource determination information table 23 in which the station address in the station address part in the master file IO request structure 212 is set is searched, and the station address part 231 is searched.
The failure request destination resource number in the failure request destination resource number section 233 corresponding to the above is acquired, and the master file read key code and the master file read for the master file IO processing unit 4 having the failure request destination resource number The address of the buffer is notified and a request for referring to the master file 6 is issued. For example, when the station address is “0”, the corresponding failure request destination resource number “200” is set.
From the request destination resource determination information table 23, and issues a request to refer to the master file 6-2 to the master file IO processing unit 4-2 having the failure request destination resource number “200”.

Upon receipt of this request, the master file IO processing unit 4 reads the corresponding data from the master file 6 corresponding to itself to the master file read buffer in the master file IO request structure 212, and the reading is completed normally. Completion code indicating whether or not master file IO
It is set in the completion code section in the request structure 212, and the master file IO request processing section 22 is notified of the completion of reading.

It is needless to say that the present invention can be applied to data processing other than the data processing in the master file reference method of this embodiment as long as the data processing refers to the master file 6 based on the requested data. (In this embodiment, the master file read key code does not exist in the request data and the master file read key code is indirectly obtained from the data in the data file 5. However, depending on the content of the data processing, the request data In some cases, the master file read key code is set and the master file read key code is obtained directly from the request data). Moreover, the mode of issuing the request data is not limited to the issue from the terminal as in the present embodiment.

[0027]

As described above, according to the present invention, a master file IO processing unit, a request destination resource judgment information table and a master file IO request processing unit are provided which correspond to each of the multiplexed master files in a one-to-one relationship. This has the following effects.

In a normal state (when a plurality of master files are normal), a plurality of multiplexed master files can be used as an active system, and IO can be distributed to the master files. Effective use of resources becomes possible.

In the event of a failure (when a failure occurs in any of the master files), the degenerate operation of the master file can be performed promptly, and the operation time of the computer system to which the present invention is applied (a fixed amount of data It is possible to shorten the operation time) for performing the processing.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing details of a data processing unit in FIG.

[Explanation of symbols]

 1 Queuing File 2 Data Processing Section 3 Data File IO Processing Section 4-1 and 4-2 Master File IO Processing Section 5 Data File 6-1 and 6-2 Master File 21 Data Processing Execution Section 22 Master File IO Request Processing Section 23 request destination resource determination information table 211 data file IO request structure 212 master file IO request structure 231 station address part 232 normal request destination resource number part 233 failure request destination resource number part

Claims (1)

[Claims] 1. A master file IO processing unit for reading data in a master file in a one-to-one correspondence with one of a plurality of master files having the same content in a computer system for processing data by referring to the master file. And a request destination resource judgment information table that stores the correspondence between the request data distribution information, the normal request destination resource number, and the failure request destination resource number, and the request data Of the normal request destination resource number corresponding to the request data distribution information of No. 1, and issues an IO request to the master file IO processing unit having the normal request destination resource number.
When a failure of the master file corresponding to the master file IO processing unit related to the request is recognized, the request destination resource at the time of failure corresponding to the request data distribution information in the request data is referred to by referring to the request destination resource determination information table. Master file IO that acquires the number and issues an IO request to the master file IO processing unit that has the resource number requested at the time of failure
A master file reference method having a request processing unit.