JP2556841B2 - File access device and method for accessing the file - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] A file access method for a computer network system including a file server, wherein each computer connected to the network system is provided with a storage means such as a RAM disk, and the file server The operating status of the file server is detected, and when the load is high, the storage means provided in the computer is temporarily written to improve the access efficiency of the file server regardless of the number of accesses.

[Industrial applications]

The present invention relates to a file access device for a computer network system having a file server shared by a plurality of computers and a method of accessing the file, and more specifically, a temporary load concentration on the file server. The present invention relates to a file access device and a method for accessing the file, in which the access efficiency is prevented from being lowered.

A system in which a large number of computers distributed in offices, factories, etc. are connected to a network and a file server such as a large-capacity hard disk is shared via the network is widely used. In such a system, if the file server is accessed by many computers at the same time and the load increases, the access of the computer that needs access to the file server for processing may be delayed. Although it is possible to improve the processing speed by increasing the speed of the server and the network system, a large amount of cost is required.

Therefore, it is desired to provide a system that can efficiently use the file server without requiring a large-scale change of the system.

[Conventional technology]

A computer network system provided with a conventional file server is a file server computer 1 as shown in FIG.
A storage device 2 such as a large-capacity hard disk connected to
A plurality of computers 4 connected via the packet switch 3 or the like
, And each computer 4 can operate without the need for a filing device.

Therefore, when a plurality of computers 4 access the storage device 2 at the same time, the load on the file server side temporarily becomes high and many computers 4 wait for a long time. Although it is possible to reduce the waiting time by increasing the speed of the hardware of the server and the network system, a large amount of cost is required.

[Problems to be solved by the invention]

In this conventional method, there is a case where a long waiting time is caused due to the load state of the server, and in order to shorten the waiting time, a work requiring a great deal of cost such as changing the hardware including the network is required.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a file device and a method for accessing the file, in which the access waiting time is reduced and the access efficiency of the file server is improved. There is.

[Means for solving problems]

FIG. 1 shows the principle of the file access device of the present invention.

In the figure, 5 is a file server computer system, which includes a load detection device 6 for detecting a load state and a communication processing device 7 in addition to the file server computer 1. Reference numeral 2 is a storage device such as a hard disk shared by a plurality of computers 4. Each computer 4 is provided with filing means 8 for temporary storage such as a RAM disk and is connected to the file server computer system 5 via the packet switch 3 or the like.

The present invention has the following configuration in a file access device including a file server computer 1 to which a storage device 2 shared by a plurality of computers 4 is connected. That is, the load detection device 6 that detects the operating state of the file server computer 1, the file server computer 1, and the plurality of computers 2
And a communication processing device 7 to which the output signal of the load detection device 6 is applied, and a temporary storage means 8 incorporated in each of the computers 4.
Detects that the operating state of the file server computer 1 is high load, applies an output signal to the communication processing device 7, and the communication processing device 7 temporarily stores the computer 4 that has issued a request to the file server computer 1. When the load detection device 6 detects that the operating state of the file server computer 1 has become a low load by issuing a command to the means 8 for writing information related to the request, an output signal is output to the communication processing device 7. It is configured by performing processing for reading out the information in the temporary storage means 8 that has been applied and written, and sending it to the file server computer 1.

Another invention is a file access method for a computer network system. The hardware used for the file access method is the same as above.

[Work]

When the load detection device 6 detects the load state of the file server computer 1 and it is detected that the file server computer 1 is overloaded, the load detection device 6 notifies the computer 4 accessed through the communication processing device 7 and notifies the main memory of the computer 4 Write data of each computer 4
The data is written in the filing means 8 for temporary storage such as a RAM disk provided inside. Next, when the file server becomes lightly loaded, a signal of transmission permission is sent to the notified computer 4 side, and the contents of the filing means 8 are written in the storage device 2.

Therefore, it is possible to significantly reduce the waiting time by only adding some hardware to the existing system.

〔Example〕

FIG. 2 shows a block diagram on the file server side of the embodiment of the present invention. Compared to FIG. 1, which is a principle diagram of the file access device of the present invention, a write request detection device 9, a notification device 10 for notifying whether writing is possible and a storage device for storing a suspended computer. 11 has been added.

FIG. 3 is a block diagram of the computer 4 side of the embodiment of the present invention. The computer 4 has a main memory 12 and a part of the main memory 12 is used as a RAM disk 13. Reference numeral 14 is a detection device for detecting a write restart signal, and 15 is a detection device for detecting a write interruption signal. The computer 4 and the detection devices 14 and 15 are connected to the network via the communication processing device 16.

Next, the operation of the system shown in FIGS. 2 and 3 will be described together with FIG. 4 which is a data flow diagram in the method of accessing the file of the present invention.

The write request detection device 9 indicates that there is a write request from the computer 4 via the communication processing device 7 to the file server computer 1 equipped with the multitasking operating system.
Then, the different processing is performed by the output of the load detection device 6 which detects the load state of the file server computer 1 by using the number of tasks and the amount of memory used. That is, in the case of a light load, a writing permission signal is generated in the notification device 10 and sent to the communication processing device 16 shown in FIG. 3 via the communication processing device 7 and a packet switch (not shown). As a result, the data is sent from the main memory 12 of the computer 4 and written in the storage device 2 of the server system.
On the other hand, when the load detection device 6 detects that the load is equal to or higher than the predetermined state, the computer that has made the write request is stored in the storage device 11 and the notification device 10 indicates that the write is impossible. Write request is made to the computer. On the computer side, the detection device 15 detects a write interruption signal, and as a result, the transmission data of the main memory 12 is temporarily written in the RAM disk 13. After that, when the load detection device 6 detects that the load on the file server computer 1 has become lighter, the computer 4 that has sent the interruption signal is read from the storage device 11 and the notification device 10 enables writing. You will be notified that it has become. Next, when the detection restart signal is detected by the detection device 14, the data accumulated in the RAM disk 13 is written in the storage device 2 of the server system via the communication processing device 16.

〔The invention's effect〕

As described above, according to the present invention, there is provided a file access device and a method for accessing the file, which reduce the waiting time without significantly changing the conventional device and improve the access efficiency of the file server. It can be provided and is extremely useful in practice.

[Brief description of drawings]

FIG. 1 is a principle diagram of a file access device of the present invention, FIG. 2 is a block diagram of an embodiment of the present invention, FIG. 3 is a block diagram of an embodiment of the present invention showing a computer side, and FIG. FIG. 5 is a flow chart of data in the method of accessing the file of FIG. 1 to 4, 1 is a file server computer, 2 is a storage device, 3 is a packet switch, 4 is a computer, 5 is a file server computer system, 6 is a load detection device, 7 is a communication processing device, and 8 is Filing means, 9 is a write request detection device, 10 is a notification device, 11 is a storage device, 12 is a main memory, 13 is a RAM disk, 14, 15 are detection devices, and 16 is a communication processing device.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sadao Fukatsu 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Fujitsu Limited (72) Inventor Nobuo Watanabe 1015, Kamedotachu, Nakahara-ku, Kawasaki City, Fujitsu Limited (56) References JP-A-57-103540 (JP, A) JP-A-56-17424 (JP, A)

Claims (3)

(57) [Claims] 1. A file access device including a file server computer to which a storage device shared by a plurality of computers is connected, a load detection device for detecting an operating state of the file server computer, the file server computer and the And a communication processing device to which an output signal of the load detection device is applied, which is inserted and connected in the middle of a plurality of computers, each of the computers having a temporary storage unit incorporated therein, and the load detection device, When it is detected that the operating condition of the file server computer is high, the communication processing device applies an output signal to the communication processing device, and the communication processing device sends a request to the temporary storage means of the computer that issued the request to the file server computer. Issuing a command to write related information, the load detection device detects that the operating state of the file server computer has become a low load When in, and applies the output signal to the communication processing device, the file access device and performs a process of sending the information of the temporary storage means is of the write reads the file server computer. 2. A file access device, wherein the temporary storage means according to claim 1 is a RAM file. 3. A file access method for a computer network system comprising a file server shared by a plurality of computers, comprising: means for detecting an operating state of the file server; Each of the computers is provided with a temporary writing file means, and when the file server operating status detecting means indicates that the file server is under heavy load, the computer that has issued the write request sends the data to the file server. Is temporarily written to the temporary writing file means, and when the file server operating state detecting means indicates that the file server has become lightly loaded, the computer that has issued the write request temporarily writes the The contents of the embedded temporary writing file means are transmitted to a file server. Remote file access method.