fio tool reports unrealistic performance numbers when measuring instance performance in Red Hat OpenStack Platform
Issue
fio tool reports unrealistic performance numbers when measuring instance performance in Red Hat OpenStack Platform
FIO results on a VM report unrealistically high performance numbers.
The profile for the test is:
cat seq-read.fio
[seq-read]
rw=read
size=56g
directory=/test
fadvise_hint=0
blocksize=8k
direct=0
numjobs=1
nrfiles=1
runtime=1h
time_based
exec_prerun=echo 3 > /proc/sys/vm/drop_caches
exec_postrun=rm -rfv /test/*
Environment
Red Hat OpenStack Platform
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