An organization plans to deploy a new business application in their environment. The new
application requires 2 TB of storage space. During peak workloads, the application is expected to
generate 9,800 IOPS with a typical I/O size of 4 KB. Because the application is business-critical,
the response time must be within acceptable range.
The available disk drive option is a 15,000 rpm drive with 100 GB capacity. The number of IOPS in
which the disk drive can perform at 100 percent utilization is 140.
What is the number of disk drives needed to meet the application’s capacity and performance
requirements?
A.
20
B.
60
C.
70
D.
100
If anyone is wondering why it’s 100 and not 70 i.e. 9800/140 it because it says application is latency sensitive, so we take the default 70% utilisation so;
140*0.7 = 98
9800/98 = 100, so need 100 disks
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