SNIA Latency Test
Here is the specification for this test –
The Latency Test measures average and maximum response times
using random IOs at specified Block Sizes and Read/Write mixes, taken under
steady state conditions. The test runs at a Queue Depth of 1 (1 outstanding
IO), thus the results give the baseline response time for a single IO request.
The test also reports maximum latency values, which can be
helpful to see if there might be processes within the drive that may cause max
Latency values to become larger.
Here is the report of the results –
These are the Average and Maximum Latency Values observed in
the Measurement Window (measured in Milliseconds).
You can see here that Steady State Convergence was achieved
at the end of Round 9 (for a detailed specification of the rules for the
determination of Steady State, please see the Myce Enterprise SSS Testing
You can see here a graph of the Maximum Latency results.
Here is a 3D graph showing, at a glance, the Maximum Latency
values for each combination of Read/Write Mix and IO Size. You can see that
the Max Latency Values are far greater than the following Average values – it
begs the question of how frequently they occur (we’ll look at this later on).
Here is a 3D graph showing, at a glance, the Average Latency
values for each combination of Read/Write Mix and IO Size.
Now let’s head to the next page, to look at the results
for the Myce/OakGate Read and Write Latency Tests……