Mixed Read / Write Workloads
In this series of tests, we measure mixed workload performance. We start with 100% read and then add data writes to the mix until we get to 100% writes, in 10% increments. We believe this will be the next major area SSD manufactures will address after performance consistency.
Mixed Workload Bandwidth
In our mixed IO test with sequential data, we observed the Ultra II losing a significant amount of performance when writes are included in the mix.
80% Read / 20% Write Bandwidth
With 80% reads and 20% writes, the Ultra II is the slowest drive on the charts. This test pushes the drive into steady state with 128K sequential blocks so the SLC doesn't really have a chance to kick in and increase the performance.
Mixed Workload Response Time
The random mix test is 50% reads and 50% writes and does not run in steady state. Here the SLC has a chance to work properly, and as you can see in the chart, the SLC layer really helps.
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- Page 1 [Introduction & Specifications, Pricing and Availability]
- Page 2 [Advanced Technology and SanDisk TLC]
- Page 3 [SanDisk Ultra II 240GB SSD]
- Page 4 [Test System Setup and ATTO Baseline Performance]
- Page 5 [Benchmarks - Sequential Performance]
- Page 6 [Benchmarks - Anvil Storage Utilities]
- Page 7 [Benchmarks - Mixed Read / Write Workloads]
- Page 8 [PCMark 8 Consistency Test]
- Page 9 [PCMark 8 Consistency Test - Continued]
- Page 10 [Benchmarks - Power Testing]
- Page 11 [Final Thoughts]