A method of accelerating disk random input and output (io) reading and writing

Abstract

The invention discloses a method for accelerating random in-out (IO) read-write of a disk. The method is characterized by comprising the steps that a computer operating system application layer performs a data read-write operation and enters a kernel mode through invagination, a virtual file system layer encapsulates data into a BIO which is an interactive data structure between the virtual file system layer and a general block layer, and then the BIO is submitted to a general block layer subsystem; the BIO is cut into the fixed block size and transmitted to a BINLOGDEV module layer at a DEVICE-MAPPER driving layer of the general block layer subsystem, when the BIO enters the BINLOGDEV module layer, whether a caching condition is met or not is checked, that is, whether the initial position of the BIO is aligned or not, whether the length of the BIO is the block length or not, if the condition is met, a step 103 is conducted, and if the condition is not met, a step 106 is conducted. According to the method for accelerating the random in-out (IO) read-write of the disk, on the condition that the random IO is written, the random IO is converted into the sequence IO, the storing velocity is high, and the efficiency is high.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to a method for accelerating disk random input and output (IO) reading and writing. Background technique [0002] In the field of data storage, especially the input and output (IO) acceleration technology, since the mechanical disk stores data through the disk, it is inevitable to perform operations such as seeking and addressing to locate the storage location, resulting in a certain delay in IO reading and writing. , it is precisely because of this feature that the IOPS (number of IO reads and writes per unit time) of the mechanical disk is extremely inefficient when it is random. [0003] In terms of disk acceleration, the SSD is usually used as a cache, and the data is first cached to the SSD to reduce real-time IO read and write requests to the mechanical disk. By adding a cache layer in the middle, the number of IO reads and writes per unit time is increased. Due to the expe...

AI Technical Summary

Problems solved by technology

This method increases the risk of data loss. If the file system uses cache write-back, that is, data is written into the cache, the application layer will write successfully by default. When the power is off, the data is not written back to the disk in time, resulting in data lost

In enterprise applications, it is often a disaster event, resulting in unrecoverable data

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