Myce/OakGate Entropy Tests
These tests are designed to show performance metrics for
different combinations of Queue Depth and Entropy % (Entropy % is the
percentage of the data that is random). Testing with different Entropy % has
become important with the advent of controllers, such as those from LSI
Sandforce, that compress data before writing it to NAND. Controllers that
compress data can be expected to perform better with highly compressible data
(i.e. data with a low Entropy).
The first test performs 5 minutes of Random 4K writes for
each combination of Queue Depth and Entropy %.
The second test does the same thing for a mixture of Read
and Write traffic (70% Reads, 30% Writes).
4K Entropy Write Test
As would be expected with a controller that does not
compress data, there is little or no variance in performance to be found in any
of the Entropy tests, as the degree of random data increases (and this comment
applies to all of the test results for the Myce/OakGate Entropy Tests).
4K Entropy 70%_Reads_30%_Writes Test
Now let’s head to the next page, to look at Power
Consumption and Data Reliability…..