Input/output operations per second (IOPS) is the measure of how many input/output operations a storage device can complete within one second.
IOPS is important for transaction-based applications.
IOPS performance is heavily dependent on the number and type of disk drives.
To calculate the IOPS of a Hard disk drive:
1
IOPS = —————————————
(Average Latency) + (Average Seek Time)
To calculate IOPS in a RAID:
(Total Workload IOPS * Percentage of workload that is read operations) + (Total Workload IOPS * Percentage of workload that is read operations * RAID IO Penalty)
