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Number of hard drive required based on number of IOPS PDF Print E-mail
Written by Siva   
Saturday, 06 November 2010 16:09

As an example, let’s assume the following:

  • Total IOPS need: 250 IOPS
  • Read workload: 50%
  • Write workload: 50%
  • RAID level: 6 (IO penalty of 6)

Result: You would need an array that could support 875 IOPS to support a 250 IOPS RAID 6-based workload that is 50% writes.

This could be an unpleasant surprise for some organizations, as it indicates that the number of disks might be more important than the size (i.e., you’d need twelve 7,200 RPM, seven 10K RPM, or five 15K RPM disks to support this IOPS need).

 

Source: http://www.yellow-bricks.com/2009/12/23/iops/

 

You may try this site: http://wmarow.com/strcalc/

Last Updated on Saturday, 06 November 2010 16:41
 
 

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