E20-526 · Question #61
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…
The correct answer is A. 128 ms. 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-
Question
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?
Options
- A128 ms
- B192 ms
- C256 ms
- D332 ms
How the community answered
(46 responses)- A80% (37)
- B11% (5)
- C2% (1)
- D7% (3)
Explanation
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-
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