Single Client Throughput
HD Video Play - 720p HD stream from Windows Media Player, 256kB reads
HD Video Record - 720p HD stream, 256kB writes
File Copy from NAS - 4GB file copy, 64kB reads
File Copy to NAS - 64kB writes
In testing the Qsan, I decided to test with SSD cache as well. I ran each test three times to give the NAS a chance to cache data and recorded the results. I started with NASPT or single client testing, this gave us a green bar for standard testing and teal for SSD. As you can see the Qsan reached 110 MB/s for record and playback and 109 MB/s for file copy operations. With the cache, we saw a slowdown in video playback and no change for file copy or record.
RAID 1 was slightly different, the cache boosted performance in video record while playback lost slightly. File copy operations came in at 107 MB/s
Benchmarks - Sequential and Workloads
Our Sequential read/write workload is centered on 128K transfer sizes at QD32.
Sequential performance reached 117 MB/s read and 115 MB/s write for the Qsan. Adding in SSD cache, performance dropped 1 MB/s on read and 2 MB/s on write.
RAID 1 showed a larger performance loss with SSD cache, dropping from 118 MB/s read and 69 MB/s read while write performance was untouched.
Moving into workloads, we see a much larger difference using the SSD cache, upwards of a 2 or 3x performance bump depending on the workload.
RAID 1 showed similar performance, SSD cache giving web server alone a 8x performance increase.
Last updated: Nov 15, 2019 at 01:16 pm CST
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