High-speed memory pre-read method and device

Abstract

This invention relates to one high speed memory pre-read method and device in memory technique, wherein the method comprises the following steps: in read operation, according current business type to compare pre-set information and determining pre-set data size and processing data. This invention aims at each certain business optimal data size of simple realization without computation or extra memory space for pre-read data.

Description

technical field [0001] The invention relates to the field of storage technology, in particular to a high-speed memory pre-reading method and device. Background technique [0002] With the rapid development of electronic technology, the performance of various processors doubles about every 2.25 years. In contrast, the disk, as the main online storage device of the computer system, although its capacity doubles every three years, However, the reading and writing speed has not improved much. As a result, the mismatch between disk and processor speeds has become increasingly prominent. [0003] Cache (high-speed memory) technology is an effective method to improve disk access speed. The location of Cache in the storage subsystem is as follows figure 1 shown. When reading the Cache, there may be a read hit or a read miss. When the read cache hits, the data is returned directly from the cache to the host. When the read cache misses, it is necessary to read the disk. The corr...

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of the prior art 1 is that the fixed read-ahead technology is not flexible, and the data to be read is rarely read in advance, and the data that the host does not read is often fetched

[0008] The multiple read-ahead technology described in the prior art 2 has certain flexibility, but it cannot really read the data to be read in advance

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