Samsung 983 ZET AIC Performance Comparisons vs. Intel Optane DC P4800X 750GB

Alright, after pages and pages of charts, here are a few more, but these are to compare and contrast the new Z-SSD with the Intel Optane SSD DC P4800X. I'm going to present the data and then explain what we are seeing (and more importantly, why). First up we'll compare QoS results:

High-Resolution QoS – Random 4KB Read:

High-Resolution QoS – Random 4KB 70/30 R/W mix:

High-Resolution QoS – Random 4KB Write:

While more of the P4800X's IO's are faster than the Z-SSD, Samsung's parts have a higher performance consistency so long as the queue depth remains low and the requests are not mixed. This is very impressive.

Random IOPS R/W (10% increment) and QD (2^x) sweep:

Sequential R/W (10% increment) and QD (2^x) sweep:

The Optane SSD generally performs better and does so at lower queue depths when compared in terms of average IOPS and sequential throughput.

Write Pressure:

This test was originally developed by Intel, but it constitutes a valid workload (for Optane) and makes a very strong point in favor of Optane parts, so I felt it was worth showing here to get an idea of where something like the Z-SSD falls in this particular workload.

Long story short, it does not do well at all in this test, but that's not to say the Z-SSD is a bad product. NAND flash, regardless of the latency magic Samsung has pulled off with it, still has its limits. In particular is the random write limitation of the Z-SSD, which comes in at less than 100k IOPS. I stop the plot for each SSD on this chart once the drive is unable to keep up with the applied paced random write workload, and that happens at the expected point for the Z-SSD. What is worth noting is that even under the lower random write pressures early in the test, the Z-SSD read latency is climbing much more quickly than the Optane SSD. This is again not a particularly bad thing – it only further backs the type of workload that the Samsung Z-SSD is designed to accelerate. Data analytics typically reads from random locations across a relatively large storage pool. There would not normally be a heavy write pressure taking place during these particular operations, so for that use case, the Z-SSD may be a more economical solution than the Intel Optane part, along with any other similar workloads where there would be minimal writes expected to take place during relatively low QD reads.

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