An organization is deploying a new business application in their environment. The new application requires 1TB of storage space for business and application data. During peak workload, applicationis expected to generate 4900 IOPS (I/O per second) with typical I/O size of 4KB.
The available disk drive option is 15,000 rpm drive with 100 GB capacity. Other specification of the drives are:
Av. Seek time = 5 millisecond and data transfer rate = 40MB/sec.
You are asked to calculate the required number of disk drives that can meet both capacity and performance requirements of an application.

Scenario

• Characteristics of new application:  
• Require 1TB of storage capacity
• Peak I/O workload 4900 IOPS
• Typical I/O size is 4KB
• Specifications of the available disk drives:
• 15K rpm drive with storage capacity = 100 GB
• Average seek time = 5ms
• Data transfer rate = 40 MB/sec
• As it is business critical application, response time must be within acceptable range

Task

• Calculate the number of disks required for the application

Exercise solutions