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Dell EMC Exam E20-526 Topic 3 Question 8 Discussion
Actual exam question for
Dell EMC's
E20-526 exam
Question #: 8
Topic #: 3
[All E20-526 Questions]
Topic #: 3
A customer is considering migrating their existing non-EMC storage arrays to an XtremIO array. The current environment consists of 350 servers running VMware ESXi 5.5 with 5000 virtual machines. The customer has various tools in place to monitor performance and collect statistics. On average, their service time is 32 ms and utilization is at 75%. In the past, the customer has had performance issues.
Based on Little's Law, what is the calculated response time on the existing environment?
Suggested Answer:
A
Disk service time T(s) = 32 ms (service time for one I/O).
Response time T(r) is calculated as: T(s) / (1 -- Utilization), which here calculates to 32 ms/ (1-0.75) = 128 ms.
References:https://community.emc.com/thread/145100?tstart=0
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