An evolutionary storage system based on a solid state disk and its working method

Abstract

The invention discloses a solid-state disk-based evolving storage system. The system comprises three parts: a working area, a first SSD pool and a second SSD pool, wherein the working area is used for providing storage services for users, predicting residual lifetime of SSDs and comparing the residual lifetime with a preset threshold value; the first SSD pool is used for providing new SSDs for the working area when the SSDs of the working area lose efficacy or need to be changed; the second SSD pool comprises SSDs which exit from the working area and lose efficacy; when the SSDs in the system work in a healthy state, the system works normally and provides high performance, when the SSDs in the system are marked unhealthy, the new SSDs in the first SSD pool are selected, and data in the original SSDs is gradually transferred to the new SSDs; and after data transmission is completed, the original SSDs are completely replaced by the new SSDs. Compared with an RAID-5 system, the system has same performance under a normal mode, and oversteps the RAID-5 system and has good lifetime prediction precision under an abnormal mode.

Description

technical field [0001] The invention belongs to the field of computer storage, and more specifically relates to an evolutionary storage system based on a solid state disk and a working method thereof. Background technique [0002] Nowadays, solid state disks (SSD for short) are widely used because they can provide higher I / O performance than mechanical hard disks. [0003] However, SSD also has serious limitations in some aspects, one of which is that in SSDs currently using the RAID-5 architecture, when an SSD fails, another SSD in the same SSD array has a similar service life. , and it is also likely to fail, which will cause the data of the entire SSD array to be unrecoverable; on the other hand, in SSDs using RAID-5 or RAID-6, when one SSD fails, the rest of the SSDs in the same SSD array Data must be reconstructed into a new SSD using redundant information, a process that greatly degrades SSD system performance. Contents of the invention [0004] Aiming at the above...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides an evolutionary storage system based on a solid-state disk, the purpose of which is to reasonably predict the service life of the SSD by analyzing the attributes of the NAND flash memory in the SSD, thereby solving the problem of existing RAID In the SSD of -5 architecture, when one SSD fails, the other SSD also fails, resulting in the technical problem that the data of the entire SSD array cannot be recovered, and in SSDs using RAID-5 or RAID-6, when a After an SSD fails, the remaining SSDs in the same SSD array must use redundant information to reconstruct data into a new SSD, which greatly reduces the technical problem of SSD system performance

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