8k Random Read/Write
Many server workloads rely heavily upon 8k performance, and we include this as a standard with each evaluation. Many of our server workloads also test 8k performance with various mixed read/write distributions.
Two ULLtraDIMMs at 70% utilization deliver 129,474 IOPS, and with 100% utilization, we receive an average of 137,415 IOPS. Both 100% and 70% utilizations of a single ULLtraDIMM weighed in with 73,000 IOPS.
Two ULLtraDIMMs in a striped RAID configuration deliver a resounding win in this test.
The benefits of extra overprovisioning are very clear. One ULLtraDIMM with 70% utilization nearly reaches the speed of two ULLtraDIMMs at 100% utilization. A single ULLtraDIMM with 100% utilization reaches 19,743 IOPS, and with 70% utilization, it weighs in with 34,547 IOPS. With two ULLtraDIMMs in RAID at 70% utilization, we observe 67,655 IOPS at 256 OIO, and higher speeds with lower loads. With 100% utilization, they score 38,897 IOPS at 256 OIO.
Once again, two ULLtraDIMMs dominate with an outstanding Latency-to-IOPS measurement.
The ULLtraDIMMs scale well in mixed workloads, and latency falls within expected scaling.
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