JPH0519169B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a file device that independently provides a plurality of data related to general information, audio signals, and video signals in parallel.

[Conventional technology]

2. Description of the Related Art Conventionally, file apparatuses have been known that employ a time-division reading method in order for a plurality of users to read out information signals stored on, for example, a magnetic disk or the like in parallel and independently.

[Problem to be solved by the invention]

In the above-mentioned conventional file devices, real-time and continuous playback of stored information was not guaranteed. a main memory section that stores an information signal corresponding to information to be reproduced; and a main memory section that reads the information signal from the main memory section at a speed M times (M≧2) a speed at which the information is continuously reproduced in real time. an M-times speed playback section; a distribution section that divides the M-times playback information signal outputted from the M-times speed playback section into N parts (an integer of M≧N≧2) and outputs a write signal; and a distribution section that temporarily stores the write signal. a temporary storage section for storing the information; a real-time reproduction section for continuously reproducing the information in real time from a signal output from the temporary storage section; and the main storage section;
The apparatus is configured to include a control section that executes a series of operations of the M times speed playback section, the distribution section, the temporary storage section, and the real-time playback section. However, the problem is that terminals using this information may access it at the same time, so the reading speed must be increased according to the number of terminals, and it is difficult to maintain the provision of information without waiting time. It was hot. In particular, when transmitting real-time information as a signal on a real time axis, the time occupation rate of one terminal occupying a communication line is high, and the above-mentioned problem becomes serious.

An object of the present invention is to provide a file device that improves the efficiency of information provision by preventing access to the same storage section or the same file even though the file device is of the same scale.

[Means and actions to solve the problem]

In order to achieve the above object, the present invention is based on the fact that as the number of terminals accessing the same storage means or the same file increases, the probability that the number of accesses to other storage means or other files will decrease increases. , the file device is provided with a management means for managing information (data) transmission requests, and this management means stores the information of storage means or files that have a high number of accesses or accesses to other storage means or storage means that have a low access number or access frequency. By copying, moving, or exchanging files, the number of accesses to each storage means or file is equalized,
This apparently increases the number of accessible files in a file device having the same size of storage means as a whole.

That is, a plurality of storage means each for storing a plurality of files, means for reading data of a desired file from the storage means in response to a transmission request from the outside, and data of the read desired file. and a means for transmitting the data to the outside via a transmission line, wherein the reading means has a plurality of outputs, divides the data of the desired file from each output, and then outputs the data intermittently; reading means for outputting a read end signal of the storage means for storing the desired file and a read end signal of the desired file when reading of the desired file is completed; means for writing the signal read by any of the reading means into the storage means; and when a transmission request is received from the outside, an external The number of transmission requests from the outside and the number of transmission requests from the outside for each file stored in each storage means are counted, and a reading end signal of the desired file and the number of transmission requests from the outside for each file stored in each storage means are counted. Each time a read end signal is generated, the counted number of transmission requests is subtracted to obtain the first current number of transmission requests and the second number of current transmission requests, and the first number of current transmission requests becomes the first number of transmission requests. and when the second current number of transmission requests exceeds the second reference value, reading the desired file into the reading means,
It is characterized by having a management section that outputs a control signal for outputting to any other writing means and outputting a control signal for writing data of the desired file to any of the other writing means. A file device is provided.

〔Example〕

Examples will be described with reference to the drawings. 1st
The figure is a block diagram of the file device of the present invention.

In Figure 1, 2-1 to 2-n are memories as storage means, which store real-time information (data) in each file (information storage unit), and store information from multiple files at once. In other words, after being read out at high speed in a time-sharing manner, it is reproduced as a continuous signal on the real time axis, and real-time information, such as audio signals, is output independently and in parallel from multiple outputs. 2
-1 to 2-n. Real time memory 2-1
2-n are provided, but for the sake of convenience, the real-time memory 2-1 will be explained. The real-time memory 2-1 stores real-time information such as music information and video information file by file, and stores continuous, Then, it is converted into a real-time signal and output. The information to be outputted can be outputted to different terminals 6 in parallel from a plurality of files. This output is sent to the communication circuit 3-1 through input/output lines 2-1-1 to 2-1-n, and
1 to 3-1-m to the transmission line 5. This signal is received by one or more terminals 6 connected to the transmission path 5 and reproduced as music or video.

The above operation is performed after the terminal 6 sends a request for desired information to the management section 4 through the transmission line 5. The management unit 4 stores necessary information files and any of the real-time memories 2-1 to 2-1 according to the index described later.
2-n and select the corresponding real-time memory 2.
-1 to 2-n, a control signal 18 is outputted to the terminal 6 to output the information of the corresponding file.

As described above, the file device sends data from the real-time memories 2-1 to 2-2 in response to a transmission request from the terminal 6.
-n is transmitting a real-time signal to the terminal 6. In addition, real-time memory 2-1 to 2-
The main storage unit 7 of the main memory unit 7 is composed of a hard disk, a semiconductor memory, etc., and currently has the fastest readout speed, and when the audio signal is divided into multiple outputs and output, approximately 50 outputs can be obtained. If it is composed of semiconductor memory, the number will be much larger.

Next, the real-time memories 2-1 to 2-n, ie, the real-time memory 2 in FIG. 2, will be explained. FIG. 2 is a block diagram of the real-time memory 2. The real-time signal reproduction system of the real-time memory 2, that is, the readout section 1
6 has the same configuration as the "file system" of the above-mentioned Japanese Patent Application No. 62-235673, but the writing circuits 13a to
13c is added, and signals from the communication circuits 3-1 to 3-n can be stored in the main storage section 7. Information from a plurality of files stored in the main storage section 7 is read out by an M times speed reproduction section 8 at a speed M times the real time. The distribution unit 9 then distributes the information to the outputs 12a, 12b, and 12c to be sent. The distributed signals are signals whose time axes are different from the actual ones, so they are stored in the temporary storage units 10a,
The information is temporarily stored in 10b and 10c. The stored information is transferred to real-time playback units 11a, 11b, 11c.
is converted into real time and played back by the output 12
a, 12b, and 12c, and this output is output to the input/output line 2-1- in the real-time memory 2-1.
1 to 2-1-n to the communication means 3-1. Although the number of outputs is set to three here, it can be increased if the read speed of the main memory is fast. That is, the number of outputs is determined by the read speed.
The control section 17 controls the above operations in response to the control signal 18.

The reproduction operation of the above data will be explained with reference to FIG. In FIG. 3, the main memory section 7 stores data A, B, and C which are continuously reproduced in the real-time memory.
Information signals corresponding to (a ₁ + a ₂ + a ₃ +…), (b ₁ + b ₂ +
b ₃ +...), (c ₁ +c ₂ +c ₃ +...) [shown in FIGS. 3A to 3C] are stored.

The M double speed reproduction section 8 reproduces the above data (a ₁ + a ₂ + a ₃ +...) ~ from the main storage section 7 at a speed that is three times or more faster than the speed at which each of the above data A to C is reproduced.
(c ₁ + c ₂ + c ₃ +...) is read out in fixed time intervals. This read signal is an M times speed reproduction information signal (a ₁ , b ₁ , c ₁ , a 2 , b ₂ , c ₂ , a ₃ , b _{3 ,} c ₃ ,...)
[Illustrated in Figure 3D].

The distribution unit 9 distributes this M times speed reproduction information signal into three parts and sends the write signal to the temporary storage units 10a, 10b, 10.
Output to c. Write signals (a ₁ , a ₂ , a ₃ , . . . ) [shown in FIG. 3E] are temporarily stored in the temporary storage unit 10a, and write signals (b ₁ , b _{2 ,} b ₃ , _... ) [shown in _FIG .
shown in Figure G] are temporarily stored.

Real-time playback sections 11a, 11b, 11c
are the signals (a ₁ , a ₂ , a ₃ , ...), (b ₁ ,
b ₂ , b ₃ , ...), (c ₁ , c ₂ , c ₃ , ...) in real time, an information signal corresponding to the data A to C stored in the main storage section 7 is generated. (a ₁ +a ₂ +a ₃ +...) to (c ₁ +c ₂ +c ₃ +...) [shown in FIG. 3 H, I, J] are continuously reproduced in real time.

The control unit 17 can instruct the main storage unit 7 to store information in response to the control signal 18 . input 1
4a, 14b, 14c are real-time memory 2
-1, input/output lines 2-1-1 to 2-1-3
Signals from the communication circuit 3-1 are inputted through the respective communication circuits 3-1, and these signals can be stored in the main storage section 7 by the write circuits 13a, 13b, and 13c. That is, in response to the control signal 18, the inputs 14a, 14
After temporarily storing the signals b and 14c, the main storage section 7
to be memorized. The control section 17 performs this control in response to the control signal 18. Also, the control signal 18 is sent to the management section 4.
is output from.

As described above, the real-time memory 2 can convert real-time information into real time and reproduce it, as well as store information from the outside. Therefore, it becomes possible to move, copy, and exchange information in one real-time memory 2-1 to 2-n to other real-time memories 2-1 to 2-n. In this case, a spare storage area, that is, a spare memory is provided in the real-time memories 2-1 to 2-n, and spare input/output lines 2-1-1 to 2-n are provided for data movement, copying, and exchange. 2-1-m is provided, that is, a part of the storage areas of the real-time memories 2-1 to 2-n is normally not used for data transmission service, and an input/output line 2 is provided.
Avoid using some of -1-1 to 2-1-m as well.

In addition, when moving, copying, or exchanging data, the real-time playback units 11a and 11 read out the data.
Although it was explained that data is exchanged through the two main storage units 7, there is no need for the data to be played back in real time.
The output is sent directly to the communication circuits 3-1 to 3-n. This also has the advantage that the data transmission time is shorter. In addition, when transmitting data to the terminal 6, the outputs of the temporary storage units 10a, 10b, 10c are directly sent to the communication circuits 3-1 to 3-n, and the data is transmitted to the terminal 6 using a time division multiplex transmission method in real time. The playback units 11a, 11b, and 11c may be provided in the terminal 6.

Next, the operation of the management section 4 will be explained.

When the management unit 4 receives a storage request from the inbound terminal 6', it responds to the request, determines one of the real-time memories 2-1 to 2-n, and sends a control signal 18 for storing each file. It outputs to the corresponding real-time memories 2-1 to 2-n and also outputs a transmission permission to the input terminal 6'. At the same time, an index of data for each real-time memory 2-1 to 2-n is created. Next, when a transmission request is received from any of the terminals 6, the management unit 4 responds to the request, searches for the corresponding file based on the above-mentioned index, and stores the control signal 18 of the transmission command in the corresponding real-time memory 2-1. ~2
-n, and at the same time, the terminal 6 counts the number of times the corresponding real-time memory 2-1 to 2-n and the corresponding file are currently being accessed.

The number of transmission requests is for each real-time memory 2-1 to 2.
-n and each of the real-time memories 2-1 to 2-n, a counting means is provided in the management unit 4, and when a request for transmission of a desired file is received, this counting means is Real-time memory 2-1 to count and store the file
2-n counting means is counted positively. On the other hand, when the sending of the data of the file is completed, the read end signal 15 subtracts the counting means of the file and the real-time memory storing the file. In this way, the current number of accesses, in this case the number of transmission requests, for each real-time memory 2-1 to 2-n and each file stored therein is obtained.

If the following conditions occur here, the management unit 4
attempts to equalize the number of accesses.

Condition 1 Access has started and the number of transmission requests in real-time memory 2 exceeds the reference value _r1 .

Condition 2: The number of transmission requests for the file for which access has started exceeds the reference value _r2 .

When both conditions 1 and 2 are satisfied, the management unit 4 selects the corresponding real-time memory 2-1 that has started accessing.
By copying the file in ~2-n to other real-time memories 2-1 to 2-n with a small number of transmission requests, the same information is copied to each real-time memory 2-n.
The same information is distributed to real-time memory 2-n, which has a small number of transmission requests.
The control signal 18 is managed to be outputted from the file with the least number of transmission requests (1 to 2-n).
That is, the management section 4 starts processing from the flowchart shown in FIG.
After passing through step 3, conditions 1 and 2 are both satisfied at block 24, so processing begins. Here, block 2
3 is the real-time memory 2-1 that started the transmission
2-n and the number of file transmission requests are counted correctly. On the other hand, when the transmission of the file is completed, the read end signal 15 is generated, and the interrupt 31 is processed.
By adding -1 to the counts of the real-time memories 2-1 to 2-n and files whose transmission has been completed in block 32, each count is made to represent the current number of transmission requests.

Next, when the process proceeds, the real-time memories 2-1 to 2-n as destinations are detected in block 26a, and
In block 27, if the destination that should be detected in block 26a cannot be detected, error processing is entered.
If detected, proceed to block 28. Next, blocks 28 and 29 detect whether there is an empty area in the storage section, and if there is no empty area, block 26
Return to process a. Block 3 if there is a free area
0, that is, the data of the file is copied to the destination real-time memories 2-1 to 2-n, and the process returns.

Next, when only condition 1 is satisfied, real-time memories 2-1 to 2-n with a small number of transmission requests are detected, files with a large number of transmission requests in the corresponding real-time memories 2-1 to 2-n are detected, and this Real-time memory 2 with a small number of files and the above transmission requests
By exchanging information with files -1 to 2-n that have a small number of transmission requests, the number of transmission requests for the corresponding memory can be reduced. That is, in FIG. 4, the process starts from the flowchart, passes through blocks 20, 21, 22, 23, and 24, and moves to block 2.
If condition 1 is satisfied in step 5, the process shown in FIG. 5 begins.
Each process of blocks 26b, 34, 35, 36, and 37 is performed, and the corresponding real-time memories 2-1 to 2-2-
The number of transmission requests of n is decreased, and if the number of transmission requests has not decreased sufficiently, the above processing is repeated. That is, in block 37, the corresponding real-time memories 2-1 to 2-
The number of transmission requests n is detected, and if the number of transmissions falls below the reference value _r1 in block 38, the process returns again, and if it does not, the process returns to block 26b and repeats the same process.

Note that when moving the above information, the information is actually copied first, and the source file is treated as a free area. Here, for exchange, if there is an empty area in either the real-time memory 2-1 to 2-n of the destination or the source, it is sufficient to copy to the empty area and delete the copy source file, but if there is not, then is performed via spare memory.

In addition, when there are multiple files with the same information, that is, when there is copied information, the management unit 4 determines that the number of transmission requests within a predetermined time, that is, the access frequency, is a reference value r ₃
If the value is lower than that, the file containing the copied information will be deleted. In other words, it is a vacant area. In this way, the real-time memories 2-1 to 2-n are kept free of unnecessary information, thereby preventing overflow of transmission requests, that is, occurrence of waiting time. still,
The access frequency can be obtained by running a timer set to the predetermined time when counting the number of accesses, and subtracting the number of accesses when the predetermined time has elapsed.

As described above, by changing the arrangement of information according to the number of accesses from terminals, it is possible to prevent accesses from concentrating on the same real-time memory 2-1 to 2-n and the same file, and the overall appearance of access It has now become possible to provide a file device that can increase the number of files that can be processed.

〔Effect of the invention〕

As explained in detail above, the file device of the present invention changes the arrangement of information according to the number of transmission requests from terminals, thereby preventing accesses from concentrating on the same real-time memory and the same file. , it was possible to increase the apparent number of accesses as a whole with the same size of storage means.

[Brief explanation of the drawing]

1 is a block diagram of a file device according to an embodiment of the present invention, FIG. 2 is a block diagram for explaining a part of FIG. 1, and FIG. 3 is a block diagram for explaining the operation of FIG. 2. The waveform diagrams, FIGS. 4 and 5 are flowcharts for explaining the operation of the file apparatus shown in FIG. 1... File device, 2, 2-1 to 2-n...
Real-time memory, 3-1 to 3-n... Communication circuit, 4... Management section, 5... Transmission path, 6... Terminal,
6'...Input terminal, 7...Main storage unit, 8...M double speed playback unit, 9...Distribution unit, 10a, 10b, 10
c...Temporary storage section, 11a, 11b, 11c...
Real-time playback section, 13a, 13b, 13c...
...Writing circuit, 16...Reading section.

Claims (1)

[Scope of Claims] 1: a plurality of storage means each for storing a plurality of files; means for reading data of a desired file from the storage means in response to an external transmission request; A file device comprising means for transmitting data of a desired file to the outside via a transmission line, wherein the reading means has a plurality of outputs, and after dividing the data of the desired file from each output, and when the reading of the desired file is completed, the reading means outputs a read end signal of the storage means for storing the desired file and a read end signal of the desired file, further comprising: a control signal; means for writing the signal read out by any of the other reading means into the storage means in response to the request, and storing the desired data when the transmission request is received from the outside. The number of external transmission requests to each storage means and the number of external transmission requests to each file stored in each storage means are respectively counted, and the reading end signal of the desired file and the desired file are stored. Each time a reading end signal of the storage means is generated, the counted number of transmission requests is subtracted, and the result is determined as a first current transmission request number and a second current transmission request number, respectively. When the number of requests exceeds the first reference value and the second current number of transmission requests exceeds the second reference value, the data of the desired file is read out by the reading means, and any other A file characterized in that it has a management section that outputs a control signal for outputting to the writing means and a control signal for writing data of the desired file to any of the other writing means. Device. 2 a plurality of storage means each for storing a plurality of files; a means for reading data of a desired file from the storage means in response to a transmission request from the outside; and means for reading data of a desired file read out. In the file device, the reading means has a plurality of outputs, divides the data of the desired file from each output, and then outputs the data intermittently. reading means for outputting a read end signal of the storage means for storing the desired file and a read end signal of the desired file when reading of the file is completed; means for writing a signal read out by any of the reading means into the storage means; and the number of external transmission requests for each file stored in each storage means, respectively, and a signal indicating the completion of reading of the desired file and reading of the storage means storing the desired file. Each time an end signal is generated, the counted number of transmission requests is subtracted and becomes a first current number of transmission requests and a second current number of transmission requests, respectively, and the first number of current transmission requests becomes the first number of transmission requests. exceeds the reference value, and when the second current number of transmission requests does not exceed the second reference value, the first number of current transmission requests is stored in the first storage means for storing the desired file. said first storage means of
detecting a second storage means that is another storage means that is less than the current number of transmission requests of the first storage means, and detecting a second current transmission request for the first file that is the file of any of the first storage means; The reading means detects a second file for which the second current transmission request number is smaller among the files in the second storage means than the number of files in the second storage means, and reads the second file from the first storage means. outputting a control signal for reading out the data in the first file and outputting a control signal for writing the first file to the writing means outputting to the second storage means, and outputting the data of the second file to the reading means for reading from the second storage means. and management means for outputting a control signal for writing data of the second file to the writing means for outputting the data to the first storage means.