his series attempts to make fragments per second results reported by
perf_fast_forward more stable. That includes running each test case
multiple time and reporting median, median average deviation, maximum
and minimum value. That should allow to relatively easily assess how
repeatable the presented results are. Moreover, since perf_fast_forward
does IO operation it is important that they do not introduce any
excessive noise to the results. The location of the data directory
is made configurable so that the user can choose less noisy disk or a
ramdisk.
* github.com/pdziepak/scylla.git stabilise-perf_fast_forward/v3:
tests/perf_fast_forward: make fragments/s measurements more stable
tests/perf_fast_forward: make data directory location configurable
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