70/30 Mixed Workload Test (Sledgehammer)
Version and / or Patch Used: Iometer 2014
Heavy Workload Model
This test hammers a drive so hard we've dubbed it "Sledgehammer". Our 70/30 Mixed Workload test is designed to simulate a heavy-duty enthusiast/workstation steady-state environment. We feel that a mix of 70% read/30% write, full random 4K transfers best represents this type of user environment. Our test allows us to see the drive enter into and reach a steady state as the test progresses.
Phase one of the test preconditions the drive for 1 hour with 128K sequential writes. Phase two of the test runs a 70% read/30% write, full random 4K transfer workload on the drive for 1 hour. We log and chart (phase two) IOPS data at 5-second intervals for 1 hour (720 data points). 60 data points = 5 minutes.
What we like about this test is that it reflects reality. Everything lines up, as it should. Consumer drives don't outperform Enterprise-Class SSDs that were designed for enterprise workloads. Consumer drives based on old technology are not outperforming modern Performance-Class SSDs, etc.
Just when we thought it couldn't get any worse for the SSD Plus and Z410 this happens. Even while filling the SSD Plus and Z410 with sequential writes the drives would drop to as low as 40MB/s, which is something we've never seen before. The SP550 delivers the highest average performance, but does so with massive performance variability.
The SSD Plus and Z410 would drop to as low as 30 IOPS with an average response time of nearly 1 second for long periods of time while running our preconditioned 70/30 random mixed workload.
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