JPS5818747A - File controlling system - Google Patents

Abstract

PURPOSE:To take out highly frequently used files at high speed, by controlling files in such a way that recently used files are always stored in a random memory and, at the same time, the indexes of the files are stored in a high speed memory in the table. CONSTITUTION:Files FA-FS are stored in a random access memory 5, a disk device 6, and a magnetic tape device 7. A table T is stack type one which controls the files FA-FS and is composed of a high speed, a medium speed, and a low speed memory. Indexes A-S of the files FA-FS are stored in the table T. When the file FR is to be read out, a processor 4 searches the table T and knows that in which device the file FR is stored. Then, a memory controlling section 8 stores the file FR stored in the device 7 in a main memory 1 and performs necessary processings. After the necessary processings are performed, the file FR is again stored in the device 7 by moving the storing location of the other files. Moreover, the index R is stored in the high speed memory in the table T and the other indexes are successively moved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a file management method for managing files in which data is stored.

As processing systems become larger and the amount of information to be stored increases dramatically, storage units +It for storing data are required to be high-speed, large-capacity, and low-priced. However, although it is difficult for two individual storage devices to simultaneously satisfy the above three conditions, it is possible to implement it as a memory system or a file system. In the conventional method, data is stored in high-speed, medium-speed, and low-speed storage devices, and each storage device is used appropriately. Even in a memory system constructed in this manner, the average access time is not necessarily short when a required file needs to be accessed.

The present invention was made to solve the above-mentioned drawbacks,
The purpose is to provide a file management method that reduces file access time.

The present invention provides a processing system having a processing device and a storage unit, which includes a storage unit configured of a plurality of memory devices having different access speeds, and a table for managing files stored in the storage unit. , wherein the processing device retrieves a required file from the storage unit and executes processing, and then stores the file in a storage device having the fastest access speed of the storage unit. 0 The present invention will be explained below with reference to the drawings. The drawing is a block diagram illustrating an embodiment of the present invention.

1 is the main memory, 2.3 is the area, and 4 is the processor.

5 is a random access memory, and 6 is a disk device.

7 is a magnetic tape device, 8 is a memory control unit # At B
jC* Ds E* Gt L Jt Kt
Ot P* Q+ Rt 8 is index, Flt FDt Flt Fx, FOt FR+
Fs* is a file, H is a high-speed memory, and M is a medium-speed memory.

L is low-speed memory, T is table hIt htt
h@.

1110t tnll ml, ms, ml
6 111g, 11 + 4s j,,
Lln is an address. 5. Random access memory as shown in the drawing. A file system is configured with the disk device 6 and the magnetic tape device 7, and the file Fm~
The table T in the drawing 0 in which F8 is stored is a stack-type table that is composed of a high-speed memory H9, a medium-speed memory M, and a low-speed memory L, and manages the files FA-PI.

Index A-8 of files Fm to F8 is stored.

In the drawing, when the processor 4 accesses the file FR, the memory controller 8 searches the table T. The order of purple-chi is from high-speed memory H to low-speed memory LO. When the index R of the file Fl is retrieved from the address 4 of the low-speed memory L, the memory control unit 8 reads the file F in the magnetic tape device 7 based on this and stores it in the area 3 of the main storage device 1. Store ◎Processor 4
teeth.

Execute processing related to the data in this file FR.

Upon completion of the process, the memory controller 8 is notified of the completion.Memory system #8 stores the file FM& in the area 3 in the random access memory 5, and stores the file FM& in the random access memory 5 in the 9 random access memory 5. Further, the file pK in the disk device 6 is transferred to the magnetic tape device 7 and stored therein. On the other hand, the memory control unit 8 stores the index R of the file in the table T.
In this case, it is stored at the highest address h of the high-speed memory H. As mentioned above, high-speed memory H to low-speed memory L are in stack format, so index A of address h1 goes to address h, and then to address ha.
The index D of the address hIo is shifted to the address m1 of the medium-speed memory M, and the index D of the address hIo is shifted to the address m1 of the medium-speed memory M, and the index D of the address hIo is shifted to the address m1 of the low-speed memory L to the index of 9 address m1 (1). In this way, the order of the indexes in table T is j
! be renewed.

As described above, the present invention *always stores recently used files in random access memory.

In addition, the index of the file is also stored in the high-speed memory in the table to manage the file.
It has the advantage that files with high tL can be retrieved at high speed.

[Brief explanation of the drawing]

The drawings are block diagrams illustrating one embodiment of the present invention.
The nine symbols used in the figure are as follows: ◎1 is the main memory;
2 and 3 are areas, and 4 is a processor. 5 is a random access memory, and 6 is a disk device. 7 is a magnetic tape device, 8 is a memory control unit I AS Bj
C* Ds E+ Gt L Jt Kt
0+ P* Q* RI S is index,
Flt FDt Fms FKt F(b Flt F
& is a file, Hd ＾ fast memory, medium speed memory. L is low-speed memory, T is table, hI, hl, h□ht
o s ms + met mas me
Number ml@, z, I 41 z,, z
. indicates an address.

Claims (1)

[Claims] In a processing system including a processing device and a storage unit,
The processing device is equipped with a storage unit composed of a plurality of storage devices with different access speeds and a table for managing files stored in the storage unit, and the processing device extracts the required files from the first copy of Mayukiki and processes them. A file management method characterized in that, after execution, the file is stored in a device having the highest access speed of the storage section.