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Wednesday, May 14, 2014

How to convert Disk throughput and Block size into IOPS
How to convert IOPS and Blcok size to throughput


Formula

To calculate IOPS

IOPS = (MBps throughput / Block Size) * 1024

Explanation:

Throughput is how much a disk can write per seconds
Block size is how much one IO can write per seconds
1024 is given from the formula to conversion like KBps or MBps

Example:


  • What number of IOPS should be used with Storage I/O Control to limit disk throughput to roughly 10MBps if the guest application writes 64KB blocks?


  1. IOPS= (10 / 64) *1024

         = 160 IOPS


To calculate Throughput

Throughput = (IOPS * Block Size) / 1024

Example:


  • What number of IOPS should be used with Storage I/O Control to limit disk throughput to roughly 10MBps if the guest application writes 64KB blocks?



  1. Throughput = (160 * 64) /1024

                           = 10

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