Hi.
I'm using fio for the first time. Sorry for the basic question.
On RHEL 8.3
# fio -filename=/mnt/testfile -direct=1 -ioengine=libaio -rw=write
-bs=1m -size=5G -numjobs=1 -runtime=60 -group_reporting -name=test
IOPS=366, BW=366MiB/s
But when -numjobs=10
IOPS=3358, BW=3358MiB/s
This is 5 times faster than the physical speed of the HDD I am using
(600MB/s).
Similar results are obtained with Sequential write.
Random read/write is fine.(Results are within 600MB/s)
https://fio.readthedocs.io/en/latest/fio_man.html#target-file-device
I refer above and use -directory=/mnt/testdir instead of -filename gave
good results.
Am I using the -filename option incorrectly?
I confirmed this with the following ver.
fio-3.26(build from git), fio-3.19-3.el8, fio-3.1-1.el7
Thanks.
Nakajima.
