These benchmarks measure the performance of persistent devices across multiple cloud platforms.
Those statistics are aggregates of data collected over hundreds of 10-minute benchmarks. Those were run using our Cloudbench library, which uses Fio to measure Disk IO.
Now viewing GCE HDD vs SSD - IO Depth >= 16: Average of Overall Latency, Random Read.
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Bandwidth is reported in KB/s, Latency is reported in microseconds.
All tests are documented as "Mode", "Block size", "IO Queue Depth".