JPH10105339A - Network file server device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accelerate a processing speed by writing write-requested data to data already stored in a buffer memory in the case of judging that they are continuing data. SOLUTION: A data look-ahead part 104 reads the write-requested data and the data continuing to the data from a storage device 101 and outputs them to the buffer memory 105 only in the case that a request judgement part 103 judges that a data write request from data write request parts B1-Bn is not the data continuing to the data write-requested in a previous time. Also, a buffer judgement part 107 judges whether or not the write-requested data are stored in the buffer memory 15 from the information of a buffer management part 106. Then, a data write part 108 writes the write-requested data in the buffer memory 105 and writes the data of the buffer memory 105 to the storage device 101.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network file server device, and more particularly to a storage device that operates in a network environment and stores a large amount of data such as audio / video information in response to write requests from a plurality of terminal devices. The present invention relates to a network file server device for writing data requested to be written.

[0002]

2. Description of the Related Art A recent computer system has a large-capacity storage device.
Increasing the speed of access to the storage device is inevitable.
Hereinafter, a conventional file server device will be described.

First, the configuration of a conventional file server device will be described with reference to FIG. In the figure, reference numeral 1600 denotes a file server device for providing data to a terminal. A terminal device 1601 requests the file server device 1600 to write data. 16
02 is a storage device for storing data. 16
A read unit 03 reads data from the storage device 1602 that has been requested to be written by the terminal device 1601. Reference numeral 1604 denotes a buffer memory.
Is temporarily stored. Reference numeral 1605 denotes a management unit that manages information of data stored in the buffer memory 1604. 16
Reference numeral 06 denotes a determination unit which determines whether or not data requested to be written by the terminal device 1601 is stored in the buffer memory 1604 based on information of the management unit 1605. A writing unit 1607 writes data requested to be written by the terminal device 1601 to the buffer memory 1604, and writes data stored in the buffer memory 1604 to the storage device 1602.

The above file server device is disclosed in Japanese Patent Application Laid-Open No. Hei 4-5723.

[0005] Next, the operation of the conventional file server device configured as described above will be described for each step with reference to FIG. (Step 1) The determination unit 1606 determines whether the terminal device 1601
It is determined whether or not the data requested to be written from the storage device 1602 is pre-read from the storage device 1602 and stored in the buffer memory 1604.

(Step 2) In step 1, data requested to be written by the terminal device 1601 is pre-read from the storage device 1602, and is read from the buffer memory 1604.
If the writing unit 1607 determines that the
Writes the data requested to be written by the terminal device 1601 to the data stored in the buffer memory 1604, and then outputs the data written to the buffer memory 1604 to the storage device 1602.

(Step 3) In step 1, data requested to be written by the terminal device 1601 is pre-read from the storage device 1602, and is read from the buffer memory 1604.
If it is determined that the data has not been output to the
3 reads the data requested to be written by the terminal device 1601 and the data following the data from the storage device 1602 and outputs the data to the buffer memory 1604. Thereafter, the operations of (Step 1) to (Step 3) are repeated.

However, when there are a plurality of terminal devices 1601 and a plurality of terminal devices simultaneously request data writing, the conventional file server device receives a data writing request from a specific terminal device among the plurality of terminal devices. Accordingly, the data requested to be written from the storage device 1602 is pre-read and output to the buffer memory 1604, and the buffer memory 1604 is occupied by the pre-read data corresponding to the data write request of the specific terminal device. In some cases, the process of pre-reading the data requested by the device from the storage device 1602 to be in a standby state. That is, the disk access of a specific terminal device is performed continuously, and there is a problem that data write is performed at a biased rate for each terminal device in response to a write request from a plurality of terminal devices. I was

Also, once data prefetching is performed,
After the data written in the buffer memory 1604 is output, it is not possible to continue to pre-read data subsequent to the data. Therefore, in response to a continuous data write request, the data is always pre-read in the buffer memory 1604. However, there is a problem that data cannot be written continuously and efficiently.

Next, a conventional network file server device will be described. In recent years, with the advancement of network technology, the use of a network file server device based on a server-client system including a server device for providing data via a network and a client device for requesting data has been active.

First, the configuration of a conventional network file server device will be described with reference to FIG.
In the figure, reference numeral 1700 denotes a network file server device for providing data to a terminal. Reference numeral 1710 denotes a first terminal device, and 1720 denotes a second terminal device, which requests the network file server device 1700 to write data. Network file server device 17
00 and the terminal devices 1710 and 1720 exchange data via a network. 1711 is the first
Data write request unit of the terminal device 1710, 1721
Is a data write request unit of the second terminal device 1720,
The data write requests of the terminal devices 1710 and 1720 are sequentially transmitted to the network file server device 1700,
It receives a data write response from the network file server device 1700. A request input unit 1701 receives data write requests from the data write request units 1711 and 1721. 1702
Is a data write unit for writing data in response to a data write request. Reference numeral 1703 denotes a response transmission unit.
A data write response indicating that the data write unit 1702 has written data is sent to the data write request unit 17.
11, 1721.

Next, the operation of the conventional network file server device configured as described above will be described with reference to FIG.

(Step 1) First terminal device 1710
The data write request unit 1711 transmits a data write request to the request input unit 1701 of the network file server device 1700.

(Step 2) The request input unit 1701
The received data write request is sent to the data write unit 170
Output to 2. The data writing unit 1702 writes data in response to the data writing request, and sends a data writing response indicating that the data has been written to the response transmitting unit 1.
703.

(Step 3) The response transmitting unit 1703
A data write response is transmitted to the data write request unit 1711 of the first terminal device 1710.

Further, the operation when the data write request unit 1721 of the second terminal device 1720 transmits many data write requests to the network file server device 1700 at a time will be described with reference to FIG.

(Step 4) Second terminal device 1720
The data write request unit 1721 of the network file server device 17
00 to the request input unit 1701.

(Step 5) First Terminal 1710
The data write request unit 1711 transmits a data write request to the request input unit 1701 of the network file server device 1700.

(Step 6) The request input unit 1701
The received data write request from the data write request unit 1721 of the second terminal device 1720 is output to the data write unit 1702. Data writing unit 17
02 writes data in response to the large number of data write requests, and outputs a data write response indicating that the data has been written to the response transmitting unit 1703.

(Step 7) The request input unit 1701
The received data write request from the data write request unit 1711 of the first terminal device 1710 is output to the data write unit 1702. Data writing unit 1702
Writes the data in response to the data write request, and outputs a data write response indicating that the data has been written to the response transmitting unit 1703.

(Step 6) The response transmitting unit 1703
A data write response to the data write request from the second terminal device 1720 is sent to the data write request unit 17.
21. After that, a data write response to the data write request from the first terminal device 1710 is
The data is transmitted to the data write request unit 1711.

As described above, in the conventional network file server device, when the data write request unit 1721 of a certain terminal device 1720 sends a large number of data write requests to the network file server device 1700 at once, the data write request Since the data writing unit 1702 and the network are occupied for processing the request, processing for the data writing request of the other terminal device 1710 is delayed, and there is a problem that continuous and efficient data writing cannot be performed.

[0023]

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and has a high processing speed for a write request from a plurality of terminal devices, and has a uniform processing speed for each terminal device. It is an object of the present invention to obtain a network file server device capable of writing data to a storage device at an appropriate rate.

[0024]

According to a first aspect of the present invention, there is provided a network file server apparatus comprising: a plurality of data write request units transmitted from a plurality of data write request units included in a plurality of terminal devices; A network file server device for receiving a data write request via a network, reading data requested to be written by a certain terminal device among the terminal devices from a storage device, and providing the read data to the certain terminal device, And a request receiving unit that receives a data write request transmitted by the certain terminal device, and a data write request from the certain terminal device output by the request receiving unit is input, and the write request is received. Determines whether the data is continuous with the data that was previously requested to be written by the terminal device Request determination unit, and when the request determination unit determines that the data requested to be written by the certain terminal device is not data continuous with the data previously requested to be written, the write request is received from the certain terminal device. A data prefetch unit for reading data and data following the data from the storage device, and a plurality of buffers corresponding to each of the plurality of terminal devices for temporarily storing the data read from the storage device A buffer memory unit having a memory, a buffer management unit that manages information on data temporarily stored in the plurality of buffer memories, and the terminal device based on information on data managed by the buffer management unit. It is determined whether or not the data requested to be written from is stored in the buffer memory corresponding to the terminal device. A buffer determination unit that writes data requested by the terminal device to a buffer memory corresponding to the terminal device, reads the written data from the buffer memory, and outputs the data to the storage device; With
The data pre-reading unit, when there is an empty area in the buffer memory corresponding to the certain terminal device, the data read from the storage device and requested to be written by the certain terminal device and the data continuous with the data, Stored in the buffer memory corresponding to the terminal device, if there is no free space in the buffer memory corresponding to the certain terminal device, wait for data read from the storage device until a free space is secured in the buffer memory, The data writing unit, when the buffer determination unit determines that the data requested to be written from the certain terminal device is not stored in the buffer memory corresponding to the certain terminal device, a write request is issued from the certain terminal device. Until the stored data is stored in the buffer memory corresponding to the terminal device. If waiting for data writing to the buffer memory, the buffer amount determining unit, the data write request from said certain terminal apparatus is determined to have been stored in the buffer memory corresponding to the terminal device in the above,
Data requested to be written by the terminal device is written to the buffer memory, the written data is read from the buffer memory, and output to the storage device.

According to a second aspect of the present invention, there is provided a network file server device according to the first aspect, wherein the plurality of data write requests from the plurality of terminal devices output by the request receiving unit are output. A request storage unit that separately stores the plurality of terminal devices; and a data write request stored in the same number of the request storage units for each of the plurality of terminal devices within a preset time interval. A request order control unit that reads out from the request storage unit in the order of storage in the request storage unit and outputs the data to the data writing unit, and the data writing unit buffers the data requested to be written from the plurality of terminal devices. A data write response from the data write unit indicating that the data has been written to the memory is sent via the network. Is characterized in that and a response transmitting unit that transmits to the terminal device.

According to a third aspect of the present invention, there is provided the network file server device according to the second aspect, wherein the request order control unit is configured to control the plurality of terminals within a predetermined time interval. Request rate control for reading data write requests stored in the request storage unit for a predetermined number of devices from the request storage unit in the order in which they are stored in the request storage unit, and outputting the data write requests to the data writing unit Part.

According to a fourth aspect of the present invention, there is provided the network file server device according to the first aspect, wherein the data writing unit stores the data requested to be written by the plurality of terminal devices in the buffer memory. A response storage unit that stores a data write response from the data write unit indicating that data has been written to each of the plurality of terminal devices, and within a predetermined time interval, A response order control unit that reads and outputs the same number of data write responses stored in the response storage units from the response storage unit in the order in which the data write responses are stored in the response storage unit; and A response transmitting unit that transmits a data write response to the terminal device via the network. The one in which the features.

According to a fifth aspect of the present invention, there is provided the network file server device according to the fourth aspect, wherein the response order control unit is configured to control the plurality of terminals within a predetermined time interval. A response rate control unit that reads out and outputs the data write responses stored in the response storage unit for a predetermined number of devices from the response storage unit in the order in which the data write responses are stored in the response storage unit. It is a feature.

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. Hereinafter, the network file server device according to the first embodiment of the present invention will be described. First,
The configuration of the network file server device according to the first embodiment will be described with reference to FIG. 1 in the figure
Reference numeral 00 denotes a network file server device for providing requested data to a terminal. A1, A
.., An are terminal devices for requesting data writing. The network file server device 100 and the terminal devices A1, A2,..., An exchange data via a network. B1, B2, ..., B
n is a data write request unit, which sequentially transmits data write requests from the terminal devices A1 to An to the network file server device 100,
It receives a data write response from 00.
A storage device 101 stores data. 1
02 is a request receiving unit, and data write request units B1 to Bn
The data write request is received from the server. 10
Reference numeral 3 denotes a request determination unit which determines whether or not the data write request from the data write request units B1 to Bn is data continuous with the previously requested data. 1
Reference numeral 04 denotes a data pre-reading unit. Only when the request determination unit 103 determines that the data write request from the data write request units B1 to Bn is not data that is continuous with the previously requested data, the data that has been requested to be written. The data following the data is read from the storage device 101 and output to the buffer memory 105. 105 is a buffer memory for temporarily storing data, and has buffer memories A1 to An respectively corresponding to the terminal devices A1 to An. For example, data from the terminal device A1 is stored in the buffer memory A1. The stored data from the terminal device A2 is stored in the buffer memory A2. A buffer management unit 106 stores information of data temporarily stored in the buffer memory 105. Reference numeral 107 denotes a buffer determination unit which determines whether or not the data requested to be written is stored in the buffer memory 105 based on information of the buffer management unit 106. Reference numeral 108 denotes a data writing unit that writes the data requested to be written to the buffer memory 105 and stores the data in the buffer memory 105 in the storage device 1.
01 is written.

In addition to the above configuration, actually, the storage device 10
1 and various components such as a control unit for controlling the input and output of data of the buffer memory 105 are required, but are omitted since they are not the main subject of the present invention.

Next, a method of determining data by the request determination unit 103 will be described with reference to FIG. 4A is a diagram showing data X composed of n blocks, FIG. 4B is a diagram showing data previously requested to be written by the terminal device A1, and FIG. FIG. 9 is a diagram showing data requested to be written this time from A1. 4 (b), if the data requested to be written last time is block X1 of data X, and from FIG. 4 (c), the data requested to be written this time is block X2 of data X, the block X
Since the end address B of No. 1 and the start address B of the block X2 match, it is determined that the data requested to be written this time is continuous with the data requested to be written last time. As described above, the start address and the end address of the data requested to be written are stored, and the request is determined based on whether the start address of the data requested to be written this time matches the end address of the data requested last time. The determination unit 103 determines whether the current request data is continuous with the previous request data.

Next, the operation of the network file server apparatus according to the first embodiment configured as described above, for example, when a write request is made for the block data whose start address is A shown in FIG. Figure 2
This will be described with reference to FIG. The network file server device 100 according to the first embodiment performs processing according to the algorithm shown in FIG.

(S1) As shown in FIG. 2, in S1, the request determination unit 103 determines whether the data requested to be written by the write request unit of the terminal device is continuous with the data requested to be previously written.

If it is determined that the data requested to be written is continuous with the data requested to be written last time, the process proceeds to S3 described later.

If it is determined that the data requested to be written is not continuous with the data requested to be written last time, the data prefetching unit 104 executes a prefetch process in S2. The processing flow of this look-ahead process follows the algorithm shown in FIG.

Hereinafter, the prefetch process will be described with reference to FIG. (S30) In S30, the data prefetch unit 104
Confirms data to be read from the storage device 101 from the data requested to be written. For example, it is assumed that the data requested to be written is data for one block of the head address A.

(S 31) In S 31, the buffer determination section 107 determines whether or not there is a free area in the buffer memory 105 based on the information of the buffer management section 106. As shown in FIG. 5, for example, information on data stored in each of the buffer memories A1 to An corresponding to each of the terminal devices A1 to An and a free area of each of the buffer memories A1 to An are stored in the buffer management unit 106. Information is stored. According to the information of the buffer memory management unit 106, if there is a free area in the buffer memory A1, S32
If there is no free area, the standby state for writing to the buffer memory 105 continues until a free area is secured.

(S32) In S31, the buffer memory 10
If it is determined that there is a free area in the storage device 10, in S32, the data pre-reading unit 104 stores the block data whose head address is A and the data that follows the block data.
Read from 1. When the reading of data from the storage device 101 is completed, the process proceeds to step S3 (see FIG. 2) described later.

(S33) In S33, the data read in S32 is stored in the buffer memory 105, and the buffer management unit 106 updates the information. When the buffer memory management unit 106 manages information in a format as shown in FIG. 5, the data length is incremented and the value of the empty area is decremented to thereby increase the buffer management unit 106.
Update information. For example, here, the data length is incremented by one.

As described above, when it is determined that the data requested to be written is not continuous data of the data requested to be previously written, the data pre-reading unit 104 proceeds to (S31).
To (S33) are repeated.

A description will be given of the steps after step S3. (S3) In S3, the buffer determination unit 107 determines whether the data requested to be written is stored in the buffer memory 105 with reference to the information of the buffer management unit 106. If it is determined that the data requested to be written is stored in the buffer memory 105, the process proceeds to the next S4. If it is determined that the data requested to be written is not stored in the buffer memory 105, the process waits until the data requested to be written is stored in the buffer memory 105. The process proceeds to the next S4.

(S4) In S4, only when it is determined in S3 that the data requested to be written is stored in the buffer memory 105, the data writing unit 108
Writes the requested data to the data stored in the buffer memory 105.

(S5) The data written in the buffer memory 105 is output to the storage device 101.

(S6) In S6, the buffer management unit 106 updates the information in the buffer memory. When the buffer memory management unit 106 manages information in a format as shown in FIG. 5, it updates the values of the start address, data length, and free area.

The above is the processing flow of the network file server device 100 according to the first embodiment.

Next, the transition of data stored in the buffer memory A1 and the transition of information in the buffer memory A1 managed by the buffer management unit 106 at that time will be described with reference to FIGS.
This will be described with reference to FIG. FIG. 6 shows a buffer memory A1 corresponding to the terminal device A1 and a buffer memory A2 corresponding to the terminal device A2 among the buffer memories A1 to An.
Is shown. First, as shown in FIG. 6A, there is an empty area in the buffer memories A1 and A2. Since no data is stored in the buffer memory A1 as in this case, the information format of the buffer memory A1 managed by the buffer management unit 106 is as shown in FIG.

In FIG. 6A, it is assumed that a block X1 (see FIG. 4) of data X not continuous with the previously requested data has been requested to be written by the terminal device A1.
Since there is free space in the buffer memory A1, the data prefetch unit 104 reads the block X1 from the storage device 101 and outputs it to the buffer memory A1, as shown in FIG. FIG. 7B shows the information format of the buffer management unit 106 at this time. Thereafter, the data pre-reading unit 104 pre-reads the data continuing from the block X1 sequentially from the storage device 101 and outputs the data to the buffer memory A1.

In FIG. 6B, it is assumed that a block Y1 (not shown) of data Y not continuous with the previously requested data has been requested to be written by the terminal device A2.
Since there is an empty area in the buffer memory A2, the data prefetch unit 104 reads the block Y1 and the block Y2 following the block Y1 from the storage device 101, and first stores the block Y1 in the buffer memory A2 as shown in FIG. Output. At the same time as the output of the block Y1 to the buffer memory A2, the block X2 is output to the buffer memory A1. FIG. 7C shows the information format of the buffer management unit 106 at this time. Thereafter, the data pre-reading unit 104 sequentially pre-reads data continuing from the block Y1 from the storage device 101 and outputs the data to the buffer memory A2.

In FIG. 6C, the data prefetch unit 104
Tries to output the block X3 to the buffer memory A1, but since there is no free space in the buffer memory A1, the data prefetch unit 104 stores the block X3 in the buffer memory A1.
Enters the standby state without outputting 3. On the other hand, since there is an empty area in the buffer memory A2, the block Y2 is output to the buffer memory A2 as shown in FIG.
FIG. 7D shows the information format of the buffer management unit 106 at this time.
Shown in

In FIG. 6D, when the block X1 stored in the buffer memory A1 is sent to the storage device 101, as shown in FIG.
Free space is created in The buffer management unit 106 at this time
Fig. 7 (e) shows the information format.

In FIG. 6 (e), since there is a free area in the buffer memory A1, the data prefetch unit 104 outputs the block X3 to the buffer memory A1, and enters the state shown in FIG. 6 (f). FIG. 7F shows the information format of the buffer management unit 106 at this time.

In FIG. 6 (f), when the block Y1 stored in the buffer memory A2 is sent to the storage device 101, as shown in FIG. 6 (g), the buffer memory A2
Free space is created in The buffer management unit 106 at this time
Fig. 7 (g) shows the information format.

In FIG. 6G, since there is a free space in the buffer memory A2, the data pre-reading unit 104 outputs the block Y3 to the buffer memory A2, and the state shown in FIG. FIG. 7H shows the information format of the buffer management unit 106 at this time.

As described above, as long as there is an empty area in the buffer memories A1 and A2, the data pre-reading unit 104 stores data continuous with the data requested to be written last time in the storage device 10.
1 and continue to output to the buffer memory 105.

As described above, in the network file server according to the first embodiment, the plurality of terminal devices A1 to A1
A plurality of buffer memories A1 to An corresponding to each of An
Provided, when the request determination unit determines that the data requested to be written from the plurality of terminal devices is not data that is continuous with the data requested to be written from the same terminal device last time,
As long as there is free space in the buffer memory, the data read-ahead unit pre-reads the data requested to be written and the data following it from the storage device, and outputs the data to the buffer memory corresponding to the terminal device that requested the write, and When it is determined that the data is data, the data requested to be written is written to the data already stored in the buffer memory, so that the data requested to be written by a plurality of terminal devices is always read from the storage device. Are stored in a plurality of buffer memories, so that data can be written at a uniform rate with respect to each terminal device data write request without being biased toward processing of a specific terminal device data write request. This has the effect of reducing the processing speed for a plurality of data write requests.

In the first embodiment, a plurality of data prefetch units 104 may be provided for each of the terminal devices A1 to An, and one data prefetch unit 104 may execute the data sequentially.

In FIG. 3 of the first embodiment, it is assumed that the prefetching of data is incremented by one block. However, the present invention is not limited to this, and the value may be set arbitrarily.

In FIG. 4 of the first embodiment, whether or not the current request data is continuous with the previous request data is determined by referring to the address of the block data. A method may be used in which the block number of the current request data is determined by directly referring to the block number instead of the data address and determining whether or not the block number of the current request data starts with the block number following the last block number of the previous request data.

In FIG. 5 of the first embodiment, the buffer memory 10 corresponding to each of the terminal devices A1 to An
5 blocks 150 terminals, but the terminal devices A1 to An
It may be different every time, and is not limited to this numerical value.

In FIGS. 5 to 7 of the first embodiment,
Although the format of the data information managed by the buffer management unit 106 is composed of the head address and the data length, the format is not limited to this, but is actually limited to the address (cylinder number, header number, sector number) on the disk. Any format may be used as long as the range of data stored in the buffer memory 105 can be understood, such as a management format.

In FIG. 6 of the first embodiment, the transition of data stored in the buffer memories A1 and A2 has been described, but the same applies to the buffer memories A3 to An.

In FIG. 6 of the first embodiment, the case where each of the buffer memories A1 and A2 has a storage area for two blocks has been described. However, the present invention is not limited to two blocks, but is more than two blocks. Is also good.

In FIGS. 6 and 7 of the first embodiment,
Although the information in the buffer memory A1 has been described, the same applies to the buffer memories A2 to An.

Embodiment 2 Hereinafter, a configuration of a network file server according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 8 is a block diagram of a network file server device according to the second embodiment. In FIG. 8, 8
Reference numeral 00 denotes a network file server device for providing data to a terminal. 810 is a first terminal device,
A second terminal device 820 issues a data write request. Network file server device 800
And the terminal devices 810 and 820 exchange data via a network. Reference numerals 811 and 821 denote data write request units, which sequentially send data write requests from the terminal devices 810 and 820 to the network file server device 800.
, And receives a data write response from the network file server device 800. A request receiving unit 801 receives data write requests from the data write request units 811 and 821. 802
Is a request accumulating unit that receives and accumulates a data write request output from the request accepting unit 801. At this time, a data write request from the data write request unit 811 and a data write request from the data write request unit 821 are stored. Are stored separately for each of the data write request units 811 and 821. A request order control unit 803 outputs the data write requests output from the request storage unit 802 to the data write unit 804 in the order in which the data write requests are received, one at a time interval set in advance. 804, a data writing unit;
3 is to write data in response to the data write request output from. Reference numeral 805 denotes a response transmission unit which sends a data write response indicating that the data writing unit 804 has written data to the data writing request units 811 and 82.
1 is transmitted.

Next, the operation of the network file server device according to the second embodiment configured as described above will be described for each step with reference to FIG. FIG. 9 is a timing chart showing transmission timings of a data write request transmitted by the data write request units 811 and 821 and a data write response transmitted by the response transmission unit 805.

(Step 1) At time interval 1, the data write request unit 811 of the first terminal device 810 sends two data write requests -a and -b to the request receiving unit 801 of the network file server device 800. I do.

(Step 2) The request receiving unit 801 outputs the data write requests -a and -b to the request storage unit 802, and the request storage unit 802 stores the data write requests.

(Step 3) At time interval 2, the request order control unit 803 takes out one data write request-a stored in the request storage unit 802 and outputs it to the data write unit 804.

(Step 4) At time interval 2, the data writing unit 804 writes data in response to the data writing request-a, and sends a data writing response to the response transmitting unit 8.
Output to 05.

(Step 5) At time interval 2, the response transmitting unit 805 transmits the data write response -a to the data write request unit 811 of the first terminal device 810.

(Step 6) Next, after the elapse of a preset time (at time interval 3), the request order control unit 803 extracts one data write request-b stored in the request storage unit 802 and retrieves the data. Output to the writing unit 804.

(Step 7) Data writing unit 804
Writes data in response to the data write request-b at time interval 3 and sends a data write response to the response transmitting unit 8
Output to 05.

(Step 8) At time interval 3, the response transmission unit 805 transmits the data write response-b to the data write request unit 821 of the second terminal device 820.

Thereafter, the network file server device 800 repeats the processing of steps 6 to 8 until there is no more data write request stored in the request storage unit 802.

On the other hand, during the time interval 3 while the above processing is repeated, a data write request from the second terminal device 820 and a data write request from the second terminal device 820 are sent to the request receiving unit 801 at time interval 3 and later. The operation of the network file server device 800 when it is input will be described below.

(Step 9) At time interval 3, the data write request unit 811 of the first terminal device 810 receives two data write requests -c and -d from the request receiving unit 801.
To the second terminal device 820 at time interval 3 as well.
The data write request unit 821 transmits two data write requests -a and -b to the request receiving unit 801.

(Step 10) The request receiving unit 801 outputs the data write requests -c, -d, -a, -b to the request storage unit 802, and the request storage unit 802 stores the data write requests.

(Step 11) At time interval 4, the request order control unit 803 extracts one data write request-c stored in the request storage unit 802 and outputs it to the data write unit 804. Similarly, at time interval 4, the request order control unit 803 extracts one data write request-a and outputs it to the data write unit 804.

(Step 12) At time interval 4, the data writing unit 804 writes data in response to the data writing request-c, and outputs a data writing response to the response transmitting unit 805. Similarly, at time interval 4, the data writing unit 804 writes data in response to the data writing request-a, and sends a data writing response to the response transmitting unit 805.
Output to

(Step 13) At time interval 4, the response transmitting unit 805 transmits the data write response-c to the data write request unit 811 of the first terminal device 810.
Similarly, at time interval 4, the response transmission unit 805 transmits the data write response -a to the data write request unit 821 of the second terminal device 820.

(Step 14) Next, after the elapse of a preset time (at time interval 5), the request order control unit 803
One data write request-d stored in the request storage unit 802 is extracted and output to the data write unit 804. Similarly, at time interval 5, the request order control unit 803
One data write request-b is extracted and output to the data writing unit 804.

(Step 15) At time interval 5, the response transmitting unit 805 transmits the data write response -d to the data write request unit 811 of the first terminal device 810.
Similarly, at time interval 5, the response transmission unit 805 transmits the data write response-b to the data write request unit 821 of the second terminal device 820.

Thereafter, the network file server 800 repeats the processing of steps 14 to 15 until there is no more data write request stored in the request storage unit 802.

As described above, in the network file server according to the second embodiment, the request order control unit 803
Sends a data write request at a preset time interval.
In addition, since data is taken out from the request storage unit 802 in which a plurality of data write requests are stored, and data is written in accordance with the data write request taken out by the data write unit 804, data can be written at an equal rate. That is, even when a large number of data write requests are transmitted from a certain terminal device to the network file server device at a time among a plurality of terminal devices, the data write unit and the network may be occupied by the processing for the request. Thus, there is an effect that, in response to a data write request from a plurality of terminal devices, data can be written to each terminal device at an equal rate.

Third Embodiment A network file server according to a third embodiment of the present invention will be described with reference to FIGS. FIG. 10 is a block diagram showing a configuration of the network file server device according to the third embodiment. 1 in the figure
000 is a network file server device according to the third embodiment. This network file server device 1000 is a modification of the network file server device 800 according to the above-described second embodiment, and the request order control unit 803 in the second embodiment becomes a request rate control unit 1003 in the third embodiment. Is different. The request rate control unit 1003
02, and receives the data write request output from the data write request unit 10 at predetermined time intervals.
Data write requests of a predetermined number for each of the data write units 100 and 100 are received in the order in which the data write requests are received.
4 is output. For example, there is one data write request from the data write request unit 1011, two data write requests from the data write request unit 1021,
The case where the request rate control unit 1003 is set to output the data to the data writing unit 1004 will be described.

Next, the operation of the network file server apparatus 1000 according to the third embodiment configured as described above will be described for each step with reference to FIG. FIG. 11 shows a data write request unit 101.
10 is a timing chart showing transmission timings of a data write request transmitted by a communication transmission unit and a data write response transmitted by a response transmission unit.

(Step 1) At time interval 1, the data write request unit 1011 of the first terminal device 1010
The data write requests -a and -b are input to the request receiving unit 1001 of the network file server 1000.

(Step 2) The request receiving unit 1001 stores the data write requests -a and -b in the request storage unit 1002.
And the request accumulation unit 1002 accumulates the data write request.

(Step 3) At time interval 2, the request rate control unit 1003 retrieves one data write request-a stored in the request storage unit 1002 according to a preset value, and sends it to the data write unit 1004. Output.

(Step 4) At time interval 2, the data writing unit 1004 writes data in response to the data writing request-a, and outputs a data writing response to the response transmitting unit 1005.

(Step 5) At time interval 2, the response transmission unit 1005 transmits the data write response -a to the data write request unit 1011 of the first terminal device 1010.

(Step 6) Next, after a preset time has elapsed (at time interval 3), the request rate control unit 1003 according to the preset value stores the data write request stored in the request storage unit 1002 in accordance with the preset value. b is taken out and output to the data writing unit 1004.

(Step 7) At time interval 3, the data writing unit 1004 writes data in response to the data writing request-b, and outputs a data writing response to the response transmitting unit 1005.

(Step 8) At time interval 3, the response transmission unit 1005 transmits the data write response-b to the data write request unit 1021 of the second terminal device 1020.

Thereafter, the network file server 1000 repeats the processing of steps 6 to 8 until there is no more data write request stored in the request storage unit 1002.

On the other hand, while the above processing is repeated, at time interval 3 and thereafter, a data write request from the second terminal device 1020 and a data write request from the second terminal device 1020 are sent to the request receiving unit 1001 together with the data write request from the first terminal device 1010. The operation of the network file server device 1000 when it is input will be described below.

(Step 9) At time interval 3, the data write request unit 1011 of the first terminal device 1010
The data writing requests -c and -d are transmitted to the request receiving unit 1001 of the network file server device 1000. Similarly, at time interval 3, the second terminal device 1020
Transmits the four data write requests -a, -b, -c, -d to the request receiving unit 1001.

(Step 10) The request receiving unit 1001 outputs the data write requests -c, -d, -a to -d to the request storage unit 1002, and the request storage unit 1002 stores the data write requests.

(Step 11) At time interval 4, the request rate control unit 1003 obtains a value according to a preset value.
One data write request-c stored in the request storage unit 1002 is extracted and output to the data writing unit 1004. Similarly, at time interval 4, the data write requests -a and -b stored in the request storage unit 1002 are
And outputs it to the data writing unit 1004.

(Step 12) At time interval 4, the data writing unit 1004 writes data in response to the data writing request-c, and outputs a data writing response to the response transmitting unit 1005. Similarly, at time interval 4, the data writing unit 1004 sends the data write request -a,-
Data is written according to b, and a data write response is output to the response transmission unit 1005.

(Step 13) At time interval 4, the response transmitting unit 1005 transmits the data write response-c to the data write request unit 1011 of the first terminal device 1010. Similarly, at time interval 4, the response transmission unit 1005 transmits the data write responses -a and -b to the second terminal device 10.
Two are transmitted to the twenty data write request units 1021.

(Step 14) Next, after a preset time has elapsed (at time interval 5), the requested rate control unit 1003
Is stored in the request storage unit 1002 according to a preset value.
Of the data writing request-d stored in the data writing unit 1004. Similarly, at time interval 5, the request rate control unit 1003 extracts two data write requests -c and -d and outputs them to the data write unit 1004.

(Step 15) At time interval 5, the data writing unit 1004 writes data in response to the data writing request -d, and outputs a data writing response to the response transmitting unit 1005. Similarly, at time interval 4, the data writing unit 1004 sends the data write request -c, -c.
Data is written according to d, and a data write response is output to the response transmission unit 1005.

(Step 16) At time interval 5, the response transmission unit 1005 transmits the data write response -d to the data write request unit 1011 of the first terminal device 1010. Similarly, at time interval 5, the response transmission unit 1005 transmits the data write response-b to the data write request unit 1021 of the second terminal device 1020.

Thereafter, the network file server 1000 repeats the processing of steps 14 to 16 until there is no more data write request stored in the request storage unit 1002.

As described above, in the network file server according to the third embodiment, the request rate control unit 10
03 retrieves, at a preset time interval, data write requests of a preset number for each terminal device from the request storage unit 1002 in which a plurality of data write requests are stored, and retrieves the data write requests by the data write unit 1004. Since the data is written in response to the data write request, the second terminal device 1020 can write twice as much data write request as the data write request from the first terminal device 1010. That is,
Even if a large number of data write requests are transmitted from a certain terminal device to the network file server device at a time among a plurality of terminal devices, the data write unit and the network are not occupied in the processing for the request, It is possible to write data in response to data write requests from a plurality of terminal devices at a preset ratio, and there is an effect that the data writing unit and the bandwidth of the network can be used effectively.

Fourth Embodiment A network file server according to a fourth embodiment of the present invention will be described with reference to FIGS. FIG. 12 is a block diagram of a network file server device according to the fourth embodiment. In the figure, 1200 is a network file server device, 1210 is a first terminal device, 1220 is a second terminal device, 1211 is a data write request unit of the first terminal device 1210, and 1221 is data write request of the second terminal device 1220. Request part, 120
Reference numeral 1 denotes a request receiving unit, and 1202 denotes a data writing unit.
Reference numeral 1203 denotes a response accumulation unit which stores a data write response indicating that the data writing unit 1202 has written data.
1204 is a response order control unit for storing the data write responses stored in the response storage unit 1203, separately for each data write request unit 1211, 1221.
The data is output to the response transmission unit 1205 in the order of reception at one rate at a preset time interval. 1205
Is a response transmission unit.

Next, the operation of the network file server device according to the fourth embodiment configured as described above will be described with respect to each step with reference to FIG. FIG. 13 shows the data write request units 1211 and 122
1 and the response transmission unit 120
5 is a timing chart showing a transmission timing of a data write response transmitted by the transmission unit 5;

(Step 1) At time interval 1, the data write request unit 1211 of the first terminal device 1210
The data write requests -a and -b are transmitted to the request receiving unit 1201 of the network file server device 1200.

(Step 2) The request receiving unit 1201
The data write requests -a and -b are output to the data write unit 1202.

(Step 3) Data writing unit 120
2 writes data in response to the data write request -a, outputs a data write response to the response accumulation unit 1203, and the response accumulation unit 1203 accumulates the data write response. Subsequently, the data writing unit 1202 writes data in response to the data writing request-b, outputs a data writing response to the response accumulation unit 1203, and the response accumulation unit 1203 accumulates the data writing response.

(Step 4) At time interval 2, the response order control unit 1204 extracts the data write response -a stored in the response storage unit 1203, and sends the response transmission unit 1a.
Output to 205.

(Step 5) At time interval 2, the response transmission unit 1205 transmits the data write response -a to the data write request unit 1211 of the first terminal device 1210.

(Step 6) Next, after a preset time has elapsed (at time interval 3), the response order control unit 1204
The data write response-b stored in the response storage unit 1203 is extracted and output to the response transmission unit 1205.

(Step 7) At time interval 3, the response transmission unit 1205 transmits the data write response -b to the data write request unit 1211 of the first terminal device 1210.

Thereafter, the network file server 1200 repeats the processing of steps 6 and 7 until there is no longer a data write response stored in the response storage unit 1203.

On the other hand, during time interval 3 while the above processing is repeated, a data write request from the second terminal device 1220 and a data write request from the second terminal device 1220 are sent to the request receiving unit 1201 together with the data write request from the first terminal device 1210. The operation of the network file server device 1200 when input is described below.

(Step 7) At time interval 3, the data write request unit 1211 of the first terminal device 1210
The request receiving unit 1 receives the data write requests -c and -d.
201. Similarly, at time interval 3, the terminal device 12
The 20 data write request units 1221 transmit two data write requests -a and -b to the request receiving unit 1201.

(Step 8) The request receiving unit 1201
The data write requests -c, -d, -a, and -b are output to the data writing unit 1202.

(Step 9) Data writing unit 120
2 writes data in response to the data write request -c, outputs a data write response to the response accumulation unit 1203, and the response accumulation unit 1203 accumulates the data write response. Subsequently, the data writing unit 1202 writes data according to the data write requests -d, -a, and -b, and outputs each data write response to the response storage unit 1203. To accumulate.

(Step 10) At time interval 4, the response order control unit 1204 retrieves one data write response-c stored in the response storage unit 1203 and outputs it to the response transmission unit 1205. Similarly, at time interval 4, the response order control unit 1204 retrieves one data write response -a stored in the response storage unit 1203 and outputs it to the response transmission unit 1205.

(Step 11) At time interval 4, the response transmission unit 1205 transmits the data write response-c stored in the response storage unit 1203 to the data write request unit 1211 of the first terminal device 1210. Similarly, at time interval 4, the response transmission unit 1205 transmits the data write response -a to the data write request unit 1221 of the second terminal device 1220.

(Step 12) Next, after a preset time has elapsed (at time interval 5), the response order control section 1204
Retrieves one data write response -d stored in the response storage unit 1203 and outputs it to the response transmission unit 1205. Similarly, at time interval 5, the response order control unit 1204
Extracts one data write response -b and outputs it to the response transmission unit 1205.

(Step 13) At time interval 5, the response transmission unit 1205 transmits the data write response -d to the data write request unit 1211 of the first terminal device 1210. Similarly, at time interval 5, the response transmission unit 1205 transmits the data write response-b to the data write request unit 1221 of the second terminal device 1220.

Thereafter, the network file server 1200 repeats the processing of steps 12 and 13 until there is no data write response stored in the response storage unit 1203.

As described above, in the network file server according to the fourth embodiment, the first terminal 121
A data write response to a data write request from 0 and a data write response to a data write request from the second terminal device 1220 can be output to the response transmitting unit 1205 equally. That is, the data write request units 1211, 1112 of the terminal devices 1210, 1220
1221 transmits a new data write request to the network file server device 1200 after receiving the data write response, so that one of the data write request units of the plurality of terminal devices The write request is not transmitted to the network file server device, and an effect is obtained that an even data write request can be transmitted to each terminal device.

Fifth Embodiment A network file server according to a fifth embodiment of the present invention will be described with reference to FIGS. FIG. 14 is a block diagram showing a configuration of the network file server device according to the fifth embodiment. 1 in the figure
Reference numeral 400 denotes a network file server according to the fifth embodiment. The network file server 1400 is a modified example of the network file server 1200 according to the fourth embodiment. The response order control unit 1204 in the fourth embodiment is different from the fifth embodiment in that
The difference is that a response rate control unit 1404 is provided. The response rate control unit 1404 receives the data write response output from the response accumulation unit 1403, and sets a predetermined number of data write responses for each data write request unit of the terminal device at a preset time interval. Are output to the response transmission unit 1405 in the order in which they are received. Here, the data write request unit 14
11 and one data write request from the data write request unit 1421 and the response rate control unit 14 so as to output them to the response transmission unit 1405.
The case where the value is set to 04 in advance will be described.

Next, the operation of the network file server device configured as described above will be described with reference to FIG. FIG. 15 is a timing chart showing transmission timings of a data write request transmitted by the data write request units 1411 and 1421 and a data write response transmitted by the response transmission unit 1405.

(Step 1) At time interval 1, the data write request unit 1411 of the first terminal device 1410
The data write requests -a and -b are transmitted to the request receiving unit 1401 of the network file server device 1400.

(Step 2) The request receiving unit 1401
The data write requests -a and -b are output to the data write unit 1402.

(Step 3) Data writing section 140
2 writes data in response to the data write request -a, outputs a data write response to the response storage unit 1403, and the response storage unit 1403 stores the data write response. Subsequently, the data writing unit 1402 writes data in response to the data write request-b, outputs a data write response to the response accumulation unit 1403, and the response accumulation unit 1403 accumulates the data write response.

(Step 4) At time interval 2, the response rate control unit 1404 extracts one data write response -a stored in the response storage unit 1403 according to a preset value, and sends it to the response transmission unit 1405. Output.

(Step 5) At time interval 2, the response transmission unit 1405 transmits the data write response -a to the data write request unit 1411 of the first terminal device 1410.

(Step 6) Next, after a preset time has elapsed (at time interval 3), the response rate control unit 1404 sets the data write response stored in the response accumulation unit 1403 according to the preset value. b is extracted and output to the response transmission unit 1405.

(Step 7) At time interval 3, the response transmission unit 1405 transmits the data write response -b to the data write request unit 1411 of the first terminal device 1410.

Thereafter, the network file server apparatus 1400 repeats the processing of steps 6 and 7 until there is no data write response stored in the response storage section 1403.

On the other hand, during the time interval 3 while the above processing is repeated, the data write request from the second terminal device 1420 and the data write request from the second terminal device 1420 are sent to the request receiving unit 1401 together with the data write request from the first terminal device 1410. The operation of the network file server device 1400 when it is input will be described below.

(Step 8) At time interval 3, the data write request unit 1411 of the first terminal device 1410
The request receiving unit 1 receives the data write requests -c and -d.
Send to 401. Similarly, at time interval 3, the terminal device 14
The twenty data write request units 1421 transmit four data write requests -a to -d to the request receiving unit 1401.

(Step 9) The request receiving unit 1401
The data write requests -c, -d, -a to -d are output to the data writing unit 1402.

(Step 10) Data writing unit 14
02 writes data in response to the data write request -c, outputs a data write response to the response storage unit 1403, and the response storage unit 1403 stores the data write response. Subsequently, the data writing unit 1402 writes data in response to the data write requests -d and -a to -d, and outputs each data write response to the response storage unit 1403. To accumulate.

(Step 10) At time interval 4, the response rate control unit 1404 obtains a value according to a preset value.
One data write response -c stored in the response storage unit 1403 is extracted and output to the response transmission unit 1405. Similarly, at time interval 4, the response rate control unit 1404 stores the data write responses -a and -b stored in the response storage unit 1403 by 2 according to a preset value.
And outputs it to the response transmitting unit 1405.

(Step 11) At time interval 4, the response transmitting unit 1405 transmits the data write response -c stored in the response storage unit 1403 to the data write request unit 1411 of the first terminal device 1410. Similarly, at time interval 4, the response transmission unit 1405 transmits two data write responses -a and -b to the data write request unit 1421 of the second terminal device 1420.

(Step 12) Next, after a preset time has elapsed (at time interval 5), the response rate control unit 1404
Is a response accumulating unit 140 according to a preset value.
Then, one data write response -d stored in No. 3 is taken out and output to the response transmission unit 1405. Similarly, at time interval 5, the response rate control unit 1404 extracts two data write responses -c and -d according to a preset value and outputs the data write responses -c and -d to the response transmission unit 1405.

(Step 13) At time interval 5, the response transmitting unit 1405 transmits the data write response -d to the data write request unit 1411 of the first terminal device 1410. Similarly, at time interval 5, the response transmission unit 1405 transmits two data write responses -c and -d to the data write request unit 1421 of the second terminal device 1420.

Thereafter, the network file server apparatus 1400 repeats the processing of steps 12 and 13 until there is no longer a data write response stored in the response storage section 1403.

As described above, in the network file server device according to the fifth embodiment, a predetermined number of data write responses for each terminal device and a plurality of data write responses are generated at predetermined time intervals. The response transmission unit 140 is extracted from the stored response storage unit 1403.
5 so that the first terminal device 1410
The second terminal device 1420 sends twice the amount of data write response as compared to the data write response to
10, 1420. That is, the data write request unit 12 of the terminal devices 1210 and 1220
11, 1221 transmits a new data write request to the network file server device 1200 after receiving the data write response, so that any one of the data write request units of No data write request is sent to the network file server device, and data corresponding to data write requests from a plurality of terminal devices can be written at a preset rate. There is an effect that can be used effectively.

In the second to fourth embodiments, a case has been described where there are two terminal devices, but any number of terminal devices may be used.

Further, in the second to fourth embodiments, the case has been described in which each terminal device has one data write request unit, but the number of data write request units may be one or more.

[0149]

As described above, in the network file server device according to the present invention, a plurality of buffer memories are provided corresponding to a plurality of terminal devices, respectively, and the data requested to be written by the plurality of terminal devices are stored in the same terminal device last time. If the data is not continuous with the data requested to be written from the storage device, the data requested to be written and the data following it are pre-read from the storage device and output to the buffer memory corresponding to the terminal device requested to write, and If it is determined that the data is to be written, the data requested to be written is written to the data already stored in the buffer memory, so that the processing speed of each terminal device for the data write request can be reduced. As well as deviating from the processing for data write requests from specific terminal devices Ku, it is possible to write data at a uniform rate to the data write request of the plurality of terminal devices, the practical effect is large.

Further, in the network file server device according to the present invention, even if a large number of data write requests are transmitted from a plurality of terminal devices at once, the same number of data write requests are sent to each terminal device. Since data write processing is performed, and an equal number of data write responses are transmitted to each terminal device to the terminal devices, a large number of data write requests from a specific terminal device Even if the data is centrally transmitted to the network file server device, the data can be written equally in response to the data write request of each terminal device without occupying the network for the data write process of one terminal device. It becomes possible.

Further, in the network file server device according to the present invention, even if a large number of data write requests are transmitted from a plurality of terminal devices at once, the number of data write requests set in advance for each terminal device is satisfied. Data write processing is performed, and a predetermined number of data write responses are transmitted to the terminal devices for each terminal device, so that the data write request has a different transfer rate for each terminal device. Even if the data is transmitted to the network file server device, the data can be written equally in response to the data write request of each terminal device, so that the network bandwidth can be used more effectively and the practical effect is great. .

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a system including a network file server device according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing a processing flow of a network file server device according to the first embodiment.

FIG. 3 is a flowchart illustrating a flow of a data prefetch process performed by a data prefetch unit according to the first embodiment;

FIG. 4 is a schematic diagram showing an example of data stored in a buffer memory management unit according to the first embodiment.

FIG. 5 is a schematic diagram showing an example of data requested from a terminal device according to the first embodiment.

FIG. 6 is a schematic diagram illustrating an example of data stored in a buffer management unit according to the first embodiment.

FIG. 7 is a schematic diagram showing an example of a state of transition of data in a buffer memory according to the first embodiment.

FIG. 8 is a block diagram showing a configuration of a network file server device according to a second embodiment.

FIG. 9 is a timing chart showing transmission timings of a data write request and a data write response in the second embodiment.

FIG. 10 is a block diagram showing a configuration of a network file server device according to a third embodiment.

FIG. 11 is a timing chart showing transmission timings of a data write request and a write response in the third embodiment.

FIG. 12 is a block diagram illustrating a configuration of a network file server device according to a fourth embodiment.

FIG. 13 is a timing chart showing transmission timings of a data write request and a write response in the fourth embodiment.

FIG. 14 is a block diagram showing a configuration of a network file server device according to a fifth embodiment.

FIG. 15 is a timing chart showing transmission timings of a data write request and a write response in the fifth embodiment.

FIG. 16 is a block diagram showing a configuration of a system including a conventional file server device.

FIG. 17 is a block diagram showing a configuration of a conventional network file server device.

[Explanation of symbols]

100, 800, 1000, 1200, 1400, 17
00 network file server device, 101, 16
02 storage device, 102, 801, 1001, 120
1, 1401, 1701 request receiving unit, 103 request determining unit, 104 data pre-reading unit, 105 buffer memories A1 to An, 106 buffer managing unit, 107 buffer determining unit, 108, 804, 1004, 1202, 1
402, 1702 data write unit, A1 to An terminal device, B1 to Bn data write request unit, 810,
1010, 1210, 1410, 1710 First terminal device, 820, 1020, 1220, 1420, 172
0 second terminal device, 811, 821, 1011, 10
21, 1211, 1221, 1411, 1421, 17
11,1721 Data write request unit, 802,10
02 request storage unit, 803 request order control unit, 805,
1005, 1205, 1405, 1703 Response transmission unit, 1003 Request rate control unit, 1203, 1403
Response accumulation unit, 1204 Response order control unit, 1404
Response rate control unit, 1600 file server device, 1
601 terminal device, 1603 reading unit, 1604
Buffer memory, 1605 management unit, 1606 determination unit, 1607 writing unit

Claims (5)

[Claims] A plurality of data write requests transmitted from a plurality of data write request units of each of a plurality of terminal devices are received via a network, and a write request is received from one of the terminal devices. Data
A network file server device that reads from a storage device and provides the terminal device with the data, wherein the storage device stores data, a request receiving unit that receives a data write request transmitted by the terminal device, and the request receiving unit. A request determination unit that receives a data write request from the certain terminal device that is output as input, and determines whether the write-requested data is data that is continuous from the previously requested data from the certain terminal device, When the request determination unit determines that the data requested to be written by the certain terminal device is not data that is continuous with the data that was previously requested to be written, the data that has been requested to be written by the certain terminal device and the continuous data A data read-ahead unit for reading data to be read from the storage device; A buffer memory unit having a plurality of buffer memories respectively corresponding to each of the plurality of terminal devices for temporarily storing the stored data, and managing information on data temporarily stored in the plurality of buffer memories. Buffer management unit to perform, from the information of data managed by the buffer management unit,
A buffer determination unit that determines whether or not the data requested to be written by the certain terminal device is stored in a buffer memory corresponding to the certain terminal device; A data writing unit that writes the data to the buffer memory corresponding to the device, reads the written data from the buffer memory, and outputs the data to the storage device. When there is a free area, the data requested to be written from the certain terminal device read from the storage device and the data continuous with the data are stored in the buffer memory corresponding to the certain terminal device, and the certain terminal device If there is no free space in the corresponding buffer memory, free space is Waiting for data reading from the storage device until the area is secured, the data writing unit, the buffer determination unit, the data requested to be written from the certain terminal device is stored in the buffer memory corresponding to the certain terminal device If it is determined that the data is not stored, the data is written to the buffer memory until the data requested to be written from the certain terminal device is stored in the buffer memory corresponding to the certain terminal device. However, if it is determined that the data requested to be written from the certain terminal device is stored in the buffer memory corresponding to the certain terminal device, the data requested to be written by the certain terminal device is written to the buffer memory and written. Data from its buffer memory and output it to the storage device Network file server and wherein the door. 2. The network file server device according to claim 1, wherein a plurality of data write requests from the plurality of terminal devices output by the request receiving unit are stored separately for each of the plurality of terminal devices. A request storage unit for storing the data write requests stored in the same number of the request storage units for each of the plurality of terminal devices within a preset time interval in the order in which the data write requests are stored in the request storage unit; A request order control unit that reads from the unit and outputs the data to the data writing unit; and the data from the data writing unit that indicates that the data writing unit has written the data requested to be written by the plurality of terminal devices into the buffer memory. A response transmitting unit that transmits a write response to the terminal device via the network. Network file server device. 3. The network file server device according to claim 2, wherein the request order control unit is configured to execute a request within a predetermined time interval.
A predetermined number of data write requests stored in the request storage unit for each of the plurality of terminal devices are read from the request storage unit in the order stored in the request storage unit, and output to the data writing unit. A network file server device, which is a request rate control unit that performs the request. 4. The network file server device according to claim 1, wherein the data writing unit writes data requested to be written by the plurality of terminal devices to the buffer memory, and writes the data from the data writing unit. A response accumulating unit that accumulates responses separately for each of the plurality of terminal devices; and data accumulated in the same number of the response accumulating units for each of the plurality of terminal devices within a preset time interval. A response order control unit that reads and outputs a write response from the response accumulation unit in the order in which the response is accumulated in the response accumulation unit, and the data write response from the response order control unit,
A network file server device, comprising: a response transmission unit that transmits the terminal device via the network. 5. The network file server device according to claim 4, wherein the response order control unit sets the response order within a predetermined time interval.
A response rate control unit for reading and outputting from the response storage unit the data write responses stored in the response storage unit for the preset number of the plurality of terminal devices in the order in which the data write responses are stored in the response storage unit A network file server device, characterized in that: