SSD Application Environment

Compared with ordinary mechanical hard disk, SSD disk has the same performance of sequential and random data reading, and the response time is less than 1 millisecond. It has no mechanical parts and high reliability. After careful research, analysis and testing of SSD disks from many manufacturers, H3C selected SLC SSD disks with high reliability and performance to match with 10 Gigabit storage and give the best performance. The read performance of each disk can reach 250MB / s, and the write performance of each disk can reach

170MB / s, each disk can reach 35kiops in the case of 4KB block reading and 3.3kiops in the case of 4KB block writing.

SSD disk has high performance and reliability, but the price is relatively high, and the capacity is small. This determines that SSD is more suitable for application fields with high random read ratio and high response time requirements, mainly including the following: database environment. The data disk of the database is generally used for random reading and writing of small data blocks, with high response time requirements, and the capacity below 2TB accounts for the vast majority. RAID5 composed of SSD disks can not only provide high IOPs but also maximize its capacity.

Shared data disk of high-performance cluster system. In the cluster system, a large amount of data needs to be shared, and the data needs to be frequently accessed by each node, which requires fast response. In this system, by using SSD disks, the waiting time for each node to access the shared disks can be greatly reduced, and its performance can be improved.