Kingston DC500 SSD Review: High Capacity Enterprise Storage

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Kingston DXC500R/M - Latency Under Load

For this next set of tests, we measured access latency at various queue depths with the same fully random IOmeter 4K access pattern (67% reads, 33% writes), while each of the drives was also under a sustained sequential write workload. A sustained sequential write across the entire volume was initiated, and when performance plateaued, access latency was measured with IOMeter.

Latency Under Load
Sustained Writes w/ 100% Random 4K Access Pattern
lat1


lat2


lat3


lat4

While under load, access latency increases across the board with all drives and all every queue depth. As the load on the drives increases, however, a trend emerges. The Kingston drives offered similar (though slightly better) latency at QD1, but as queue depths increased, the Kingston drives took a larger hit and latency under load was markedly higher than the Samsung drives.

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