Hi ,
Please let me know if this is not a right place to ask this question. This is the first time I use mail list.
Problem summary:
The IOPS is very unstable since I changed the number of jobs from 2 to 4. even I changed it back, the IOPS performance also can't return back.
# cat 1.fio
[global]
rw=randread
size=128m
[job1]
[job2]
when I run fio 1.fio, the iops is around 31k. and then I add the following 2 entries:
[job3]
[job4]
The IOPS dropped to around 1k.
Even I remove these 2 jobs, the IOPS still be around 1k.
Only if I removed all the jobn.n.0 files, and re-run with 2 jobs setting, the IOPS can be 31k again.
My Env:
# fio --version
fio-2.1.4
# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 6.3 (Santiago)
# cat /sys/block/sda/queue/scheduler // I tried both cfq/deadline, no difference
noop anticipatory [deadline] cfq
# bash blkinfo.sh /dev/sda
Vendor : LSI
Model : MR9260-8i
Nr_request : 128
rotational : 1
Thank you very much for your time
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