Data read-write method and device based on mixed storage device

Abstract

The invention discloses a data read-write method based on a mixed storage device. The mixed storage device comprises a small non-volatile particle addressing medium and a large non-volatile particle addressing medium. An address mapping table is stored in the small non-volatile particle addressing medium and comprises at least one address mapping record, and each address mapping record comprises a logic address, a physical address corresponding to the logic address and the number of times of write operations corresponding to the logic address. The method comprises the step of receiving an operation request, the step of analyzing the logic address of the operation request and determining the physical address of data corresponding to the operation request in the mixed storage device according to the address mapping table, the step of reading and writing the data at the corresponding position in the corresponding storage medium according to the physical address. The invention further provides a corresponding data read-write device. By means of the data read-write method and device, the extra write expenditure can be reduced, the read-write efficiency can be improved, and the service life of the storage device can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of computer data storage, and more particularly, relates to a data reading and writing method and system based on a hybrid storage device. Background technique [0002] With the development of computer technology, the number of processors in the computer system increases, and the pressure on the storage system is also increasing. Some well-known and critical applications are increasingly data-centric rather than compute-centric. Therefore, one of the main problems facing today is that under the design of a large-scale high-performance computer system, the storage system cannot maintain a matching performance growth rate. The difference in speed between processors and storage systems becomes a major bottleneck in computer performance. [0003] Existing storage systems are mainly hierarchical storage structures, and storage media are placed at different levels of the storage system according to the character...

AI Technical Summary

Problems solved by technology

The write-after-erase feature of flash memory requires an update operation of the address mapping table after the write operation; in addition, the solid-state disk is a coarse-grained read-write medium, and the read-write unit is a page, so a large number of additional writes will be caused when the address mapping table is updated. overhead

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