1.

You Need To Provision San Storage With A Certain Iops. How Will You Find What Kind Of Disks You Need?

Answer»
  • 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 IOPS of a HARD disk drive:

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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)

To calculate 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)


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