question on log file command behavior change

question on log file command behavior change

[Roger Sibert]

Hello Everyone,

It's been a stretch since I last did something that required logging
logging, that would be going from 2.0 to the latest git clone from
today.

When I tried to use my older fio configuration files with the new fio
it barked about not specifying the write_bw_log name.  The 2.0.x
version used the name from the job so you could have the options
turned on in [global].

Is the change in behavior where you now have to specify the name of
the log (thus requiring it to be in each job) intentional?

fio 2.0.x config
[global]
direct=1
ioengine=libaio
zonesize=256m
zoneskip=768m
randrepeat=1
write_bw_log
write_lat_log
;
[sda-iodepth1-write-bs1k-1]
stonewall
filename=/dev/sda
iodepth=1
rw=write
bs=1k
runtime=45s
time_based
ramp_time=15s

fio 2.1.x git from today
[global]
direct=1
ioengine=libaio
zonesize=256m
zoneskip=768m
randrepeat=1
;
[sdc-iodepth8-write-bs128k-1]
stonewall
filename=/dev/sdc
iodepth=8
rw=write
bs=128k
runtime=45s
time_based
ramp_time=15s
write_bw_log=sdc-iodepth8-write-bs128k-1
write_lat_log=sdc-iodepth8-write-bs128k-1
write_iops_log=sdc-iodepth8-write-bs128k-1


Thanks,
Roger

Re: question on log file command behavior change

[Jens Axboe]

On Wed, Aug 28 2013, Roger Sibert wrote:
> Hello Everyone,
> 
> It's been a stretch since I last did something that required logging
> logging, that would be going from 2.0 to the latest git clone from
> today.
> 
> When I tried to use my older fio configuration files with the new fio
> it barked about not specifying the write_bw_log name.  The 2.0.x
> version used the name from the job so you could have the options
> turned on in [global].
> 
> Is the change in behavior where you now have to specify the name of
> the log (thus requiring it to be in each job) intentional?

Unfortunately it is intentional, it came with the merging of the gfio
code base. Someone else recently brought it up as well. But I will see
if I can come up with a good way to make it work as it did before...

-- 
Jens Axboe