TEST BENCH AND PROTOCOL
In testing the Intel SSD DC S3500, along with all enterprise drives, we focus on long term stability. In doing so, we stress products not only to their maximum rates, but also with workloads suited to enterprise environments.
We use many off-the-shelf tests to determine performance, but we also have specialized tests to explore specific behaviors we encounter. With enterprise drives, you will see that we do not focus on many consumer level use-cases.
Our hope is that we present tangible results that provide relevant information to the buying public.
To specifically measure latency, we use a series of 512b, 4K, and 8K measurements. At each block size, latency is measured for 100% read, 65% read/35% write, and 100% write/0% read mixes.
A couple of things stood out when we looked at average latency, especially when compared to the SM843. The first is that even though the S3500 is rated for higher IOPS (75K v. 70K), it consistently had higher latency at 100% read operations. The second piece that caught our eye was how well the S3500 did when there were mixed read/write operations. This was something that left us disappointed in our Samsung SM843 SSD review.
Except for a few instances, the S3500 had higher maximum latency than the SM843. This was a little surprising considering the performance consistency of the S3700. Speaking of consistency, lets take a deeper dive into latency.