I am using fio for storage benchmarking and fio2gnuplot for plotting graphs, every time I run a test and look into logfiles of iops, second coloumn is always 1 which is iops value and due to this graphs are just a straight line perpendicular to Y axis .Which makes no sense. I tried various iodepths,ioengines but no use.am I using any parameters(options)wrong?
following is my jobfile.
[global]
enter code here
rw=randwrite
size=128m
thread=1
iodepth=2
ioengine=libaio
per_job_logs=0
directory=/home/fio
[job_512]
write_bw_log=logfiles_libaio/fio-test_512
write_iops_log=logfiles_libaio/fio-test_512
write_lat_log=logfiles_libaio/fio-test_512
bs=512b
and this is the logfile
1, 1, 0, 512
2, 1, 1, 512
18, 1, 1, 512
19, 1, 0, 512
31, 1, 1, 512
53, 1, 1, 512
55, 1, 1, 512
56, 1, 0, 512
59, 1, 1, 512
63, 1, 1, 512
According to fio manual(man fio), under "FIO FILE FORMATS", it says:
Fio supports a variety of log file formats, for logging latencies, bandwidth, and IOPS. The logs
share a common format, which looks like this:
time (msec), value, data direction, offset
Time for the log entry is always in milliseconds. The value logged depends on the type of log, it
will be one of the following:
Latency log
Value is in latency in usecs
Bandwidth log
Value is in KB/sec
IOPS log
Value is in IOPS
Data direction is one of the following:
0 IO is a READ
1 IO is a WRITE
2 IO is a TRIM
However, I think the 'offset' should be 'IO size'.
So, in your bandwidth case, it's:
timestamp(ms), bandwidth(KB/sec), R/W, size