hIOmon Services and Software

Pertinent, Empirical Disk and Application I/O Performance Metrics

 

Which Ranges of IOPS Do You Actually Use?

 

"Input/Output Operations per Second (IOPS)" is a commonplace disk storage I/O performance metric.  It is often mentioned within benchmarking test results/reviews, vendor performance claims, and various "rules of thumb”.

Average IOPS and maximum IOPS are typically cited.  The average IOPS value is generally calculated by simply dividing the total I/O operation count by the associated overall time duration, which can include seconds during which no I/O operations actually occurred.  And the maximum IOPS is usually a “one-off” value (that is, it represents the single occurrence of the maximum value).

While both of these IOPS metrics can be informative, they nevertheless provide a rather coarse view of disk I/O performance.

 

hIOmon I/O Trender Display for Write IOPS

 

As illustrated by the screen shot above, the hIOmon™ “Performance Threshold Range Metrics” provide a much more granular depiction of disk I/O operation performance.  These hIOmon metrics are specifically focused upon the ranges of IOPS as well as megabytes-per-second (MB/s) data transfer rates, response times (RT), I/O operation queue depths/lengths (QD), and data transfer sizes/lengths (DTS) actually observed by the hIOmon I/O Monitor software for individual devices, files, and processes.

For example, one Performance Threshold Range Metric is the "IOPS 1 - 99" Range Count metric for write I/O operations.  This metric reflects the number of one-second intervals during which the hIOmon I/O Monitor software actually observed a total number of monitored write I/O operations that was one or more, but less than 100 write I/O operations.

The IOPS metrics displayed within the screen shot reflect the actual I/O operation activity collected during the normal, everyday use of a desktop system by a SNIA SSSI WIOCP participant.  The demonstration version of the hIOmon DIORS On-the-Web (OTW) displays additional I/O metrics from this “SSSI WIOCP Metrics” package.

 

hIOmon Services and Software from hyperI/O

 

The hIOmon services and software from hyperI/O℠ enable you to capture, collect, display, export, and monitor a wide variety of disk I/O operation metrics based upon empirical data – and all from the perspective of the individual files, devices, and applications used within your own production environment, and with no operating system, disk, file, or application changes required.  See "hIOmon Benefits" to learn more about how hIOmon can help you.

For additional screen shots, see the hIOmon I/O Trender Display and the hIOmon Disk I/O Ranger Display.