JPS582939A - File controlling system - Google Patents

Abstract

PURPOSE:To perform processings without contradiction between the write side and the read side, by providing a write operation flag, a controlling part, index areas having data addresses and processing flags respectively, and data areas generating subvolumes in a file. CONSTITUTION:A direct access storage device DASD 1 is provided with a write operation flag which indicates whether the write processing is executed or not, a controlling part 4 having the latest index IDX number, IDXes 5-1-5-m having start and end data addresses and processing flags respectively, and subvolumes 6-1-6-m consisting of n-number of unit length data and is connected to an on- line real time processing part 2 and a batch processing part 3. In case of the data write from the processing part 2 to the device DASD1, data is written in the volume 6-m, and the end data address of the IDX5-m is updated, and the latest IDX number of the controlling part 4 is updated. In case of the data read from the device DASD1 to the processing part 3, IDXes are retrieved in order form the controlling part 4, and retrieval results are referred to read data subvolumes in parallel with the write operation.

Description

DETAILED DESCRIPTION OF THE INVENTION In a system where data is sent from device A to device B via a file, the present invention enables processing to be performed without contradiction on the device A side and device B side. Regarding the method, ◎ Real-time data exchange has traditionally been carried out via files, but the file structure in that case is simple with simple sequential data and its pointers.
I can do 1ll. However, when the logical internal structure of a file becomes more complex, it is not easy to perform consistent processing on the writing and reading sides of the seven isles.

The present invention is based on the above considerations.

Device A via a file with a complex logical internal structure
In a system in which data is transferred from device B to device B, the purpose of the present invention is to provide a nine-file control method that allows processing to be performed without contradiction on the writing side and on the displaying side. For this reason, the file control method of the present invention includes a management section that has a write operation flag indicating whether or not a write process is in progress and the latest index number, a start data φ address, a final data address, and a processing flag t.
An index area for creating an index society,
and provide a data area for creating a nap polymechanism consisting of data of unit length (s is a positive integer),
When writing data, a predetermined event for opening a sub-poly, -5 occurs, and at 9 o'clock, the above index area KfIfr is next created, and an empty area of the above data area is created in the wrinkled index. Write the start address of the newly created sub-fist polychrome and write the ON place 317 lag, then update the latest index number of the management section to point to the current index, and write the above write operation Buddha. Turn on t.

After the above index has been created and the management section has been updated, the unit-length data is sequentially folded into the newly created index and the final data address of the corresponding index is updated. At 9 o'clock, the predetermined event for terminating the meeting occurs.
When reading data by turning off the processing flag of the index corresponding to the sub-policy being written, first search the management S, then index [Search, refer to these results, and The present invention will be described with reference to the drawings.

The figure illustrates one embodiment of the invention.

In the same figure, 1 is a DA8D (direct access storage device), 2 is an on-twin real-time processing unit, 3 is a Fi high 9161111m-4B tube n1ls, 5-171
It, 5-Tsuru indicates the index, and 6-1 to 6m indicate the sub-poly drum meeting, respectively.

DA8DIH, tube j1ms4.4 number fylx5-1 to 1, sub-polymers 6-1 to 6-IIIt 0 management 1 part 4, online side operation Buddha, latest index number and latest index processing Has a flag. If the online side operation Buddha is ON, the online real-time processing 11112 is activated by the DA801.
The latest index number 0, which indicates that t access is being made, indicates which index is the latest index. In the illustrated example, the latest index is 5-s. 0 latest index processing flag indicates whether the latest index is in use 0 index 5-1.5-2
．． ...Song... G1 is subpoly-凰-5 and 1, respectively.
On a one-to-one basis, there is no match. Index 5-1 to 5
In the illustrated example, the start address of index 5-1 is the first address of index 5-1, which has a first data address, a last data address, and a sub-poly address flag. Indicates address 6 of the first data of 6-1, and the final data address is sub-poly, -5b
Since the sub-poly island is not accessed after the address b of the last data written in the address b is set to 1, the processing flag is set to OFF. In the illustrated example, the first address of index 5-2 is, and the last address is d1.
Processing 7 lag is turned off. Index 5 - Tsuru is in use, but the first address of this index is -
The final address is f, and in the example shown in the figure, the sub-address is f.
Since data is being written to the polygraph 6-book, the process [
17 The lag is on 0 The online real-time processing unit 2 collects data such as measurement processing 1 edits the data, so it rarely handles the data sent from the artificial intelligence. Processing result IDAsDK write 0 At this time, if a change in data type occurs, the sub-poly island-5 is switched and the data is written to a new sub-poly island. Online real-time processing s2 always writes/rewrites from the bottom of the hierarchical structure. In other words, when creating an index in a new way, the index [after creating]
Update management s4. When data management is to be written to the tfI-, sub-I, Muro-wound, the index 5-s is updated after writing the Nappoli Island 6-mK data. The batch processing 11113 performs science and technology planning such as analysis of plan data. batch processing 111s
3, when outputting data tlI, always index from the top of the hierarchical structure and identify the data pipe. In order to keep track of the latest data, it is possible to perform indexing at regular intervals.0 Note that the unit of reading/writing data is a record.0 From the online real-time processing unit 2 to the DA8D1. Writing of data is performed as follows. Assuming that the data is written in the sub-poly and memory areas, the data is written to the nap-poly memory by l records.
s K is written and the final data address of index 5-m is updated accordingly. When a predetermined event occurs, such as a change in the data type, a change in the originating station, or an instruction to switch the sub-poly mode from the console,
5M knot processing is performed, and sub-Bo 9. - After the system termination process is completed, the sub-polyme construction process is performed. sub·
In the Pori Island-5 finalization process, the processing flag of Napu Pori Island-55-s is turned off.

In the sub-polyom opening process, index 5-s+
1 (not shown) is created in the new 1g-, and the sub-
At the same time as the start address of poly, -mut 1+1 is written, its processing flag is turned on.

Next, the latest index number of the management section 4 is updated to Collect+1. After this sub-poli island opening process is done,
Data is written to sub-poly, -muro-10 one record at a time. The above-mentioned sub-system termination process is performed four times in response to a process termination instruction from the console. Note that the above processing is performed by the online real-time processing unit 2.
This is done under the control of

There are two methods for the patch process to read data from the DA8D1. One method is to read the file after the writing side has completed creating the file, and the other is to read it after the writing side has completed creating the file, and the other is to read it after the writing side has finished creating the file. Melt it using the following method. The former method is executed as follows.

0) Identify the index group corresponding to the created nap polyme based on the latest index number in the management section, and search the index group for the corresponding sub-polyme.

(→ Read data according to the first data address and last data address in the index.

Moreover, the latter method is executed as follows.

0) Refer to the latest index number in the management section at regular time intervals to determine whether there is a sub-lIJ&-me that has reached write 7 aids.

-) If there is, the last data e-address in the corresponding index is referred to at regular time intervals, and whether or not data has been written is determined by updating the last data address.

(c) If data has been written, read the data according to its final data address.

As is clear from the above description, according to the present invention, DA
Semi-real-time KDA in parallel with data writing process to SD
It is also possible to export data from SD.61. It was.

You can simply read past data without any contradictions.

[Brief explanation of drawings]

The figure illustrates one embodiment of the invention. 1...DASD (direct access storage device)%2...
・Online real-time processing section, 3...Batch processing section, 4...Management section, 5-1 or 5-s-index, 6-1 or 6-s...Sub-fist poly-random 0
Patent Applicant: Fujitsu Limited Representative Patent Attorney Yotsube Kyotani

Claims (1)

[Claims] A management unit that has a write operation flag indicating whether or not a write process is in progress and the latest index number 1, and a destination data file.
An index area for creating an index with an address, a final data address, and a processing flag, and a sub area consisting of unit length data on the negative side (% is a positive integer).
When creating a poly-mechanism, setting up a data area with a smooth structure, and writing data, when the ninth predetermined event that opens a sub-poly-me occurs, a new index is created in the above index area. , and write the newly created Nap Volume 1 O start address in the empty area of the data area to the Todoroki index, and write the processing flag 11 on, and then write the latest index number of the management section. Update the scissors index to point to it, set the write operation flag to on, and after creating the index and updating the management section, add a unit length data session to the newly created nap poly 1-5. While writing sequentially, the last data command address of the newly created corresponding index is updated, and when a predetermined event occurs to terminate the subpolynyme, the subpolynyme being written is updated.
When the processing bladder for the index corresponding to the system is turned off and the data is read, the management section is first searched, and then the index is