Intel® SSD Data Center S3700 Series Quality of Service
This paper covers the Quality of Service (QoS) and performance consistency of the Intel® SSD DC S3700, hereon referred to as S3700. It introduces the metrics on which Quality of Service and performance consistency are measured and characterized. It also focuses on the importance of QoS in multiple data center applications.
Quality of Service (QoS)
Quality of Service of an SSD consists of the predictability of low latency and consistency of high IOPS while servicing read/write I/O workload. This means the latency or the I/O command completion time needs to be within a specified range without having unexpected outliers. Throughput or I/O rate also needs to be within a tight regulation without causing sudden drop in performance level. QoS metric needs to be set for applications ranging from read intensive to write intensive workload.
Latency distribution of an SSD needs to hit certain service level, which can be measured by the latency of an application workload for 99.9% of the time or on a tighter scale 99.99999% of the time. SSD that optimizes around this metric will exhibit superior level of performance predictability.
Read the full Intel® SSD Data Center S3700 Series Quality of Service Technology Brief.