Data reading and writing method and device and data storage structure

Abstract

The invention provides a data reading and writing method and device and a data storage structure. The method comprises the steps that the additional numbers of data blocks are obtained; index content in data indexes is obtained according to the additional numbers and the data indexes; the hard disk number of the data blocks and partial page numbers of the data blocks are obtained according to global page numbers of the data blocks and the number of hard disks; an asynchronous reading request of the data blocks is submitted according to the page numbers, the hard disk numbers and the partial page numbers of the data blocks; according to the asynchronous reading request, after an operating system reads the data blocks, the data blocks are called back to corresponding processing flows; paging processing is carried out by the hard disks according to physical pages of the hard disks, so that hard disk storage pages comprising the physical pages of at least one hard disk is formed; each storage page corresponds to one data block. According to the data reading and writing method and device and the data storage structure, the positions of the corresponding data blocks can be obtained through the data indexes, and each storage page only corresponds to one data block, so that reading and writing operation of the data blocks is quickened.

Description

technical field [0001] The invention relates to the field of data processing, in particular to a method and device for reading and writing data and a data storage structure. Background technique [0002] SSD (Solid State Disk) is a storage device based on flash memory. It is a hard disk made of solid-state electronic memory chip arrays. It consists of a control unit and a storage unit (FLASH chip or DRAM (Dynamic Random Access Memory, Dynamic Random Take the memory) chip) composition. The SSD is inserted into the standard hard disk slot on the I / O bus, and handles requests from the CPU (Central Processing Unit, central processing unit) for reading and writing logical disk blocks. An SSD includes one or more flash memory chips and a flash translation layer. The flash chip replaces the mechanical drive in a traditional disk, and the flash translation layer is a hardware / firmware device that acts the same as the disk controller and translates requests for logical blocks Trans...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the embodiments of the present invention is to provide a data reading method to solve the technical problem that the existing data reading method is easy to block the application process, resulting in the application process being unable to effectively use the computing resources and storage resources of the device

[0010] The purpose of the embodiments of the present invention is also to provide a data writing method to solve the technical problem that the existing data writing method is easy to block the application process, resulting in the application process being unable to effectively use the computing resources and storage resources of the device

[0011] The purpose of the embodiments of the present invention is also to provide a data storage structure to solve the technical problem that the existing data reading and writing methods are easy to block the application process, resulting in the application process being unable to effectively use the computing resources and storage resources of the device

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