4k Random Read/Write
We precondition the EDGE Boost Pro 300GB Enterprise SSD for 9,000 seconds, or two and a half hours, receiving performance reports every second. We plot this data to illustrate the drive's descent into steady state.
This dual-axis chart consists of 18,000 data points, with the IOPS on the left and the latency on the right. The red dots signify IOPS, and the grey dots are latency measurements during the test. We place latency data in a logarithmic scale to bring it into comparison range. The lines through the data scatter are the average during the test. This type of testing presents standard deviation and maximum/minimum I/O in a visual manner.
Note that the IOPS and latency figures are nearly mirror images of each other. This illustrates that high-granularity testing can give our readers a good feel for latency distribution by viewing IOPS at one-second intervals. This should be in mind when viewing our test results below. This downward slope of performance only occurs during the first few hours of use, and we present precondition results only to confirm steady state convergence.
Each level tested includes 300 data points (five minutes of one second reports) to illustrate performance variability. The line for each OIO depth represents the average speed reported during the five-minute interval. 4k random speed measurements are an important metric when comparing drive performance as the hardest type of file access for any storage solution to master is small-file random. One of the most sought-after performance specifications, 4k random performance is a heavily marketed figure.
The Boost Pro occupies the lowest position in the chart at 38,460 IOPS; the Micron M500DC averages 56,259 IOPS. The Intel DC S3500 averages 57,769 IOPS, and the Samsung SM843 takes a huge lead with 95,815 IOPS. The LSI SandForce controller is one of the few that experiences significant random read speed degradation in steady state. In FOB conditions, and under lighter workloads, it can peak much higher.
The SM843 leads convincingly with the lowest latency during 4k random read activity.
Garbage collection routines are more pronounced in heavy write workloads, leading to performance variability.
The Boost Pro averages 30,504 IOPS; the Micron M500DC leads the pack with an average of 39,089 IOPS. The Intel averages 13,841 IOPS, and the Samsung provides 12,432 IOPS at 256 OIO.
The great random write performance of the Boost Pro is the result of the LSI SandForce's previous role as a flagship-class SSD. The other SSDs in our test pool, though they are in the same price point, were designed from the ground up to be value-class SSDs.
The Boost Pro and M500DC both deliver a well-defined latency distribution during the test.
Our write percentage testing illustrates the varying performance of each solution with mixed workloads. The 100% column to the right is a pure write workload of the 4k file size, and 0% represents a pure 4k read workload. Mixed workload testing reveals strengths and weaknesses that remain hidden during typical tests. In reality, much of the real-world data is going to feature mixed data.
Here we observe the Samsung SM843 leading by a wide margin with the pure random read workload on the left, but with the slightest of writes interspersed (10%) it falls to the lowest performance of the test field. The Boost Pro leads this test as we mix in more write activity, with a slight lead over the M500DC in the 30-90% write mixtures. The M500DC also handles mixed workloads very well, and both drives outpace the DC S3500 and SM843 easily.
We record the power consumption measurements during our precondition run. We calculate the stated average results during the last five minutes of the test, after the device has settled into steady state.
The Boost Pro averages 3.7 watts. The M500DC averages 4.09 watts; the DC S3500 averages 3.8 Watts, and the SM843 averages 2.66 watts during the measurement window.
IOPS-to-Watts measurements are generated from data recorded during our precondition run, and the stated average is from the last five minutes of the test.
The Boost Pro delivers 8,189 IOPS-per-Watt; the DC S3500 averages 3,125, and the SM843 averages 4,621.
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- Page 1 [Introduction]
- Page 2 [Boost Pro Internals and Specifications]
- Page 3 [Test System and Methodology]
- Page 4 [Benchmarks - 4k Random Read/Write]
- Page 5 [Benchmarks - 8k Random Read/Write]
- Page 6 [Benchmarks - 128k Sequential Read/Write]
- Page 7 [Benchmarks - Database/OLTP and Web Server]
- Page 8 [Benchmarks - Email Server]
- Page 9 [Final Thoughts]
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