IOPS and latency are not related – HDD performance explored

Recently came across this interesting and thought provoking post around IOPS and Latency.

We all know we need to consider IOPS as well as and often more critically than overall storage volume – 10TB of storage can effectively be saturated from a performance perspective but under 1TB of data that is read / written to at a high rate.  This is a message that many people don’t consider when they just say project X or application Y just needs xx GB of storage.

However even with the understanding of the need to assess IOPS required by a solution it is still possible to get caught out if you don’t consider the profile of these IOPS, and the impact of random reads and writes on the actual performance of the drives / array.  Add to this the fact that many manufacturers’ figures for their products are somewhat on the optimistic side and it is very easy to deploy a solution that at first glance appears to meet the performance requirements, but turns out to be very inadequate in practice.

So; of course consider your storage volume requirements, but make sure you pay great attention to the IOPS and latency requirements along with the usage profile. Then carefully design and test the storage solution to make sure it works as expected.

Post can be found here, interesting reading;

http://blog.richardelling.com/2012/03/iops-and-latency-are-not-related-hdd.html

K

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Author: Kevin Fielder

Innovative and dynamic security professional, with a passion for driving change by successfully engaging with all levels of the business. I am a determined individual with proven ability to provide security insights to the business, in their language. These insights have gained board buy in for delivering security strategy aligned to key business goals. This is achieved by understanding the need to drive change through people, process and technology, rather than focusing exclusively on any one area. I take pride in being a highly articulate, motivational and persuasive team-builder. I have a strategic outlook with the ability to engage with and communicate innovative and effective security solutions to all levels of management. Along with a proven ability to translate security into business language and articulate the business benefits I am also passionate about leading security innovations and making security a key part of the business proposition to its customers. Security should be made a key differentiator to drive sales and customer retention, not just a cost centre! Outside of work I am a proud husband and father to an awesome family, and a passionate CrossFit coach and athlete.

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