Method for mixed utilization of SSD and SMR hard disks in disk file system

A technology of disk files and file systems, applied in special data processing applications, instruments, electrical digital data processing, etc., and can solve problems such as random modification of information

Inactive Publication Date: 2015-12-09
ICLOUD INNOVATION BEIJING TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the design of the journal file system is that all data is written sequentially, there are still write

Method used

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  • Method for mixed utilization of SSD and SMR hard disks in disk file system
  • Method for mixed utilization of SSD and SMR hard disks in disk file system

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Embodiment Construction

[0021] The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings:

[0022] A method for mixing SSD and SMR hard disks in a disk file system includes the following steps:

[0023] Step 1: Create an SMR hard disk description table in the SSD hard disk to form the mapping relationship between the SSD hard disk and the SMR hard disk.

[0024] The mapping relationship between the SSD hard disk and the SMR hard disk established in this step can be one SMR hard disk corresponding to one SSD hard disk, or multiple SMR hard disks corresponding to one SSD hard disk. In this way, the file system can store the status information of all SMR hard disks in the system in one SSD hard disk.

[0025] Such as figure 1 As shown, an SMR hard disk description table is established in an SSD hard disk. Each SMR hard disk description table stores the following information of each SMR hard disk, including:

[0026] (1) Hard disk GUID or serial...

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Abstract

The invention relates to a method for mixed utilization of a solid state disk (SSD) and a shingled magnetic recording (SMR) hard disk in a disk file system. The method is characterized by comprising the following steps of: establishing an SMR hard disk description list in the SSD hard disk so as to form a mapping relationship between the SSD hard disk and the SMR hard disk; allocating data blocks to to-be-written data by the file system; writing the allocated data into the SSD hard disk and the SMR hard disk separately by the file system according to a data block allocation result; and updating affair group information of the SMR hard disk description list, thereby finishing a data writing cycle. According to the method, the data of the file system are divided into a part that frequently needs to be modified and a data part, the SSD hard disk is used for storing the frequently-changed part, such as metadata, so as to improve the access efficiency; and the SMR hard disk is used for storing the data blocks of a file, and because the SSD hard disk stores most random modifications, the fragment rate of the system is greatly reduced and the storage efficiency and performance are improved.

Description

Technical field [0001] The invention belongs to the technical field of magnetic disk storage, and in particular relates to a method for mixed utilization of SSD and SMR hard disks in a magnetic disk file system. Background technique [0002] With the development of hard disk technology, the capacity of a single disk has grown rapidly, and the capacity per disk area has now approached the theoretical upper limit. When traditional magnetic disks record data, they write data on non-overlapping parallel tracks with a certain distance between tracks. Shingled magnetic recording (SMR) technology is a technology to increase the storage density of magnetic disks. It will cover part of the existing tracks when writing new tracks, so that the existing tracks will be narrowed, thereby increasing the data storage density . [0003] Although the shingled magnetic recording (SMR) technology has increased the storage density, the data can only be written in sequence. For random read and write, ...

Claims

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Application Information

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IPC IPC(8): G06F3/06G06F12/08G06F17/30
Inventor 李卫华
Owner ICLOUD INNOVATION BEIJING TECH CO LTD
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