JPH05225007A - Large-capacity data input/output device - Google Patents

Abstract

PURPOSE:To simultaneously read out data different from each other, which are divided by plural internally stored data numbers, to terminal equipments different from each other in parallel. CONSTITUTION:A management data storage part 9 is provided where storage places of data which are stored in storage devices 8A to 8N and are divided by data numbers are stored and a block record number is stored also in the case of storage of data having plural data numbers in the same storage device, and an input/output processing means 6 compares the data volume of data inputted from an input/output device 2 with a reference value and detects and designates storage devices different from each other to control storage of data in the case of the data volume equal to or larger than the reference value and designates a storage device for common storage to store data in the case of the data volume smaller than the reference value. When a read request comes from a terminal equipment, the input/output processing means 6 refers to the management data storage part 9 to detect the pertinent storage device and designates data read from this storage device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large-capacity data input / output device, and more particularly to storing character and graphic information such as videotex data, and reading data in response to a request from a terminal device to a terminal device as a request source The present invention relates to a large-capacity data input / output device for outputting.

[0002]

2. Description of the Related Art A conventional large-capacity data input / output device stores a plurality of data for each data number in one large-capacity storage device, and writes / reads data to / from this storage device. ing. Therefore, in response to read requests from a plurality of terminals, data processing for one data number, that is, reading of data for a certain data number is completed, and then data for other file names is read. ing. Also, while writing data input from the input / output device to the above-mentioned storage device, other data is not read,
The specified data is read out after the above-mentioned data writing is completed.

That is, after the writing or reading of one of various data is completed, the same processing is performed for other data.

[0004]

In the conventional large-capacity data input / output device described above, only the data having one data number is processed at the same time, and the process sequentially shifts to other data. For example, when the above-described processing is performed on data having an extremely large amount of data, there is a drawback that it takes a long time to shift to the processing of the next data.

An object of the present invention is to input / output a large-capacity data capable of performing these reading processes in parallel at substantially the same time when a plurality of terminals request reading of data corresponding to different data numbers. To provide a device.

[0006]

A large-capacity data input / output device of the present invention stores data input from a specific input / output device in accordance with an input command in any of a plurality of storage devices. In a large-capacity data input / output device that reads data specified by the read command from the storage device according to a read request from the terminal device and outputs the read data to the terminal device that has output the read request, When receiving the write command of the data including the data, the data following the write command is received, the received data amount is calculated, the data amount and the data are output together with the write command, and the read command or the data number is designated. Transmission / reception control means for outputting these commands when receiving the erasing command and for outputting the data read by the read command to the input / output device , For all data already stored in the storage device, the data number, file name, stored storage device number, and if the storage device is a specific storage device, data is stored in the storage device. A management data storage unit that stores management data in which corresponding block record numbers are associated with each other, and data is written according to the command when a corresponding command is individually connected to each of the plurality of storage devices. Alternatively, when an input / output control unit that controls reading and a plurality of terminal devices are connected to each other in a one-to-one manner and a read command including a data number is received from the connected terminal devices, the read command is output and the read command is also output. And a terminal communication control means for outputting the data to the terminal device when the data of the data number designated by When a write command is received, the amount of data input following the write command is compared with a reference value stored in advance. When the amount of data is less than the reference value, the specific storage device is selected and the management is performed. A free space is obtained by referring to the data storage unit, and a write command designating a corresponding storage device and a corresponding record number is output to the corresponding input / output control unit to update and input the corresponding portion of the management data storage unit. When the amount of stored data is greater than or equal to the reference value, a storage device other than the specific storage device in which no data is stored is detected by referring to the management data storage unit and connected to the detected storage device. When a write command is output to the input / output control unit, the corresponding portion of the management data storage unit is updated, and the erase command is received, the data of the data number designated by this command is stored. The storage device is detected by referring to the management data storage unit, an erase command is output to the corresponding input / output control unit, the contents of the management data storage unit are updated, and a read command is received. When the storage device corresponding to the data number is not operating, the input / output processing means for outputting the read command to the input / output control unit connected to the storage device is provided.

[0007]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the large-capacity data input / output device of the present invention, and FIG. 2 is an explanatory diagram showing the contents stored in the management data storage unit shown in FIG.

The mass data input / output device 1 of this embodiment is
As shown in FIG. 1, the transmission / reception control means 4 connected to the external input / output device 2 and the terminal communication control means 5A to 5N connected to the terminal devices 3A to 3N on a one-to-one basis.
And the transmission / reception control means 4 and the terminal communication control means 3A to
Input / output processing unit 6 connected to 3N, management data storage unit 9 connected to input / output processing unit 6, input / output control units 7A to 7N connected to input / output processing unit 6, and these input / output control The storage units 8A to 8N are individually connected to the units 7A to 7N.

The management data storage unit 9 stores a data number given to the data, a file name given to the data having this data number, and which one of the storage devices 8A to 8N corresponds to the data number. The device number assigned to each of the storage devices 8A to 8N indicating whether or not the data is stored in the storage device and the block record number in which the data is stored in the storage device 8A when the storage device is 8A are described above. The data numbers are stored in association with each other.

The storage device 8A is a storage device for storing a plurality of data having a data amount less than a predetermined reference value, and the other storage devices 8B to 8N store data having a data amount more than the reference value described above. A storage device is used to store each one.

First, data is input and the storage devices 8A to 8N are input.
The operation of storing data in any of the above will be described.

Input data is input by the input / output device 2 following a write command including a data number and a file name. The transmission / reception control means 4 receives this, identifies that this command is a write command, and sequentially stores the data to be subsequently input in a storage area internally having the transmission / reception control means 4 at the end of the data. When the attached data end code is detected, the stored data amount is calculated and output to the input / output processing means 6 together with the above-mentioned write command.

When the input / output processing means 6 receives the write command and the information indicating the data amount, it compares the previously stored reference value with the data amount, and when the data amount is less than the reference value, this data Select the storage device 8A as the storage destination,
The block record number stored in the storage device 8A is detected by referring to the contents of the management table storage unit 9, and the block record number of the unstored area adjacent to this block record number is selected to input / output control unit 7A. In response to the input, the write command including the data number, the file name, and the selected block record number and the input data are output. At the same time, the corresponding information in the management data storage unit 9 is updated.

The input / output control unit 7A that has received this write command
Controls the writing of data in the area corresponding to the racode block number in the storage device 8A according to the instruction.

If the above-mentioned amount of data is equal to or more than the above-mentioned reference value, the input / output processing means 6 refers to the information in the management data storage unit 9 and in the predetermined order for the storage devices 8B to 8N. A storage device in which no data is stored is detected, and a data number and a file of the data for the input / output control unit (one of the input / output control units 7B to 7N) connected to the detected storage device. The write command including the name and the input data are output, and the storage content of the management data storage unit 9 is updated.

The input / output control unit that receives this write command is
Control is performed to write the data output from the input / output processing means 6 into the storage device connected to this input / output control unit.

Next, the operation for erasing the data written in the storage device will be described with reference to FIG.

A data erasing command is input from the input / output device 2. That is, when an erase command designating a data number is input from the input / output device 2, the transmission control means 4 receives it, identifies it as an erase command, and outputs the erase command as it is to the input / output processing means. Output to 6.

The input / output processing means 6 detects which storage device the data is stored from among the corresponding information stored in the management data storage unit 9 using the data number as a key, that is, the corresponding storage device, that is, , A data erasing instruction is issued to the input / output control unit (any one of the input / output devices 7A to 7N) connected to any one of the storage devices 8A to 8N. Output. At this time,
If the corresponding storage device is 8A, the corresponding block record number is also included in the erase command and output. Further, the input / output processing means 6 updates the data in the management data storage unit 9.

The input / output control unit which has received the data erasing command controls erasing of the corresponding data stored in the connected storage device to erase the corresponding data.

When a read command including a data number is output from any of the terminal devices 3A to 3N, the terminal communication control means (5A to 5N) connected to the terminal device that has output the read command. Any of them receives this and outputs the command to the input / output processing means 6.

The input / output processing means 6 refers to the management data storage section 9 by using the data number included in the read command as a key and detects in which storage device the data corresponding to the data number is stored. If the corresponding storage device is 8A, the block record number in which the data is stored is also extracted from the management data storage unit 9.

The input / output processing means 6 outputs a read command to the input / output control unit connected to this storage device if the detected storage device is not already in operation. If the target storage device is 8A. If so, the corresponding record block number is also included in the read command. However, if the corresponding storage device is already in operation, the above command is output after the operation is completed.

Upon receipt of this read command, the input / output control unit controls the read of the corresponding data from the connected storage device in accordance with the command, and the read data is sent to the input / output processing means 6 and the above-mentioned read command. Output to the terminal device via the received terminal communication control means.

Similarly, when a read command including a data number is input from the input / output device 2, this command is added to the input / output processing means 6 via the transmission control means 4. At this time, the input / output processing means 6 controls the terminal communication control means 5A to 5N.
The same operation as when the read command is received from one of the above. The data read as a result is output to the input / output device 2 via the input / output processing means 6 and the transmission / reception control means 4.

The input / output processing means 6 monitors the end of the data writing or reading process, and in this way,
When a read command or a write command is separately added to the storage device in which the data is written or read, the input / output processing means 6 outputs the read command or the write command to the corresponding input / output control unit. The standby instruction is output after the corresponding storage device finishes the processing of the preceding instruction in the corresponding storage device.

When there is a large amount of data with data numbers corresponding to the above-mentioned data amount less than the reference value, not only the storage device 8A but also the storage device 8A is used as a storage device for storing such data. The device 8B may also be made to perform the same operation as the storage device 8A. In that case, the block record number may be included in the information regarding the storage device 8B in the stored contents of the management data storage unit 9.

[0029]

As described above, the large-capacity data input / output device of the present invention can be used for data having a data amount equal to or larger than a predetermined reference value which is divided from other data by the data number. By storing only the data corresponding to the number in one storage device and storing the data whose data amount does not reach the reference value described above in the storage device storing a plurality of these data, When data having a data amount equal to or greater than the reference value is being output, the data can be output in parallel in response to a read command from another terminal device or an input / output device. Even when reading data that has a long time, reading from other terminal devices can be done in a shorter time than conventional large-capacity data input / output devices of this type. It has the advantage of being able to cope with demand.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a large capacity data input / output device of the present invention.

FIG. 2 is an explanatory diagram showing storage contents in a management data storage unit 9 shown in FIG.

[Explanation of symbols]

 1 large-capacity data input / output device 2 input / output device 4 transmission / reception control means 6 input / output processing means 9 management data storage unit 3A to 3N terminal device 5A to 5N communication control unit for terminal 7A to 7N input / output control unit 8A to 8N storage device

Claims (1)

[Claims] 1. Data input from a specific input / output device in accordance with an input command is stored in any of a plurality of storage devices, and data specified by the read command according to a read request from a plurality of terminal devices. In the large-capacity data input / output device which reads out from the storage device and outputs the read request to the terminal device, when the write command of the data including the data number is received from the input / output device, the data following the write command is received. Is received, the received data amount is calculated, the data amount and the data are output together with the write command, and when a read command or an erase command designating the data number is received, these commands are output and the read command Transmission / reception control means for outputting the read data to the input / output device, and all data already stored in the storage device Regarding the data number, the file name, the stored storage device number, and if the storage device is a specific storage device, management data in which the block record number in which the data is stored in the storage device are associated with each other. A management data storage unit that stores the data; an input / output control unit that is individually connected to the plurality of storage devices and that controls writing or reading of data according to the command when the corresponding command is received; When a read command including a data number is received from each of the terminal devices and the read command including the data number is output from the connected terminal device, the read command is output, and the data having the data number designated by the read command is output. Terminal communication control means for outputting the data to the terminal device, and when the write command is received, the write command is input subsequently. The amount of data is compared with a reference value stored in advance, and when the amount of data is less than the reference value, the specific storage device is selected and the free space is obtained by referring to the management data storage unit and corresponding storage is performed. A write command designating a device and a corresponding record number is output to the corresponding input / output control unit to update the corresponding portion of the management data storage unit, and when the input data amount is equal to or more than the reference value, A storage device other than a specific storage device in which data is not stored is detected by referring to the management data storage unit, and a write command is output to the input / output control unit connected to the detected storage device. When the corresponding portion of the management data storage unit is updated and the erase command is received, the storage device in which the data of the data number designated by this command is stored is detected by referring to the management data storage unit and the corresponding When an erase command is output to the input / output control unit, the content of the corresponding management data storage unit is updated, and a read command is received, the storage device corresponding to the data number specified in the command is not operating. A large-capacity data input / output device comprising: an input / output processing unit that outputs the read command to the input / output control unit connected to a storage device.