A customer complains about high response times. This occurs frequently with bursts of write I/O at 6,000 IOPS for 10 second periods during each minute. The write response is 60 ms during these 10 second periods. The average IOPS rate reported by Hitachi Tuning Manager over 1 minute is 600. In this scenario, what is the average response time over 1 minute?

Question

Quizplus · Accepted Answer

The average response time over 1 minute is calculated by considering the response time during the burst and the idle period. For 10 seconds, the response time is 60 ms at 6000 IOPS, and for the remaining 50 seconds, the response time is 0 ms at 0 IOPS. The average response time is (60 ms * 6000 IOPS * 10s) / (600 IOPS * 60s) = 10 ms.

A Customer Complains About High Response Times