On Wed, May 9, 2012 at 1:53 PM, Jens Axboe <axboe@xxxxxxxxx> wrote: > On 2012-05-09 22:52, Vikram Seth wrote: >> On Wed, May 2, 2012 at 5:25 AM, Georg Schönberger >> <gschoenberger@xxxxxxxxxxxxxxxx> wrote: >>> Am 2012-05-02 14:15, schrieb Jens Axboe: >>>> On 05/02/2012 02:12 PM, Georg Schönberger wrote: >>>>> Same error after a clean compilation. >>>>> $ fio --version >>>>> fio-2.0.7-13-g3b7f >>>>> $ fio --create_only --name=test-read-4k-4G-1-jobs --directory=./tests >>>>> --rw=read --size=10M --bs=4k --numjobs=4 >>>>> max value out of range: 4 (1 max) >>>>> max value out of range: 4 (1 max) >>>> Please don't top post, reply beneath what you are replying to. >>>> >>>> Parser looks confused, because you forgot to add the value for the >>>> create_only option. If you use --create_only=1 instead, it should work. >>>> >>>> I wonder why that isn't caught in the command line variant, if you put >>>> it in a job file it does catch it: >>>> >>>> axboe@nelson:/home/axboe/git/fio $ ./fio seq-null >>>> Option create_only requires an argument >>>> fio: failed parsing create_only >>>> fio: job global dropped >>>> >>>> I'll take a look at that separately. >>>> >>> That works now: >>> $ fio --create_only=1 --name=test --directory=./tests --rw=read >>> --size=10M --bs=4k --numjobs=4 >>> test: (g=0): rw=read, bs=4K-4K/4K-4K, ioengine=sync, iodepth=1 >>> ... >>> test: (g=0): rw=read, bs=4K-4K/4K-4K, ioengine=sync, iodepth=1 >>> fio-2.0.7-13-g3b7f >>> Starting 4 processes >>> test: Laying out IO file(s) (1 file(s) / 10MB) >>> test: Laying out IO file(s) (1 file(s) / 10MB) >>> test: Laying out IO file(s) (1 file(s) / 10MB) >>> test: Laying out IO file(s) (1 file(s) / 10MB) >>> >>> >>> Run status group 0 (all jobs): >>> $ ls tests/ >>> test.1.0 test.2.0 test.3.0 test.4.0 >>> >>> Nice! >>> Thanks, Georg >>> >>> P.S.: Sorry for top posting >>> >>> >>> -- >>> To unsubscribe from this list: send the line "unsubscribe fio" in >>> the body of a message to majordomo@xxxxxxxxxxxxxxx >>> More majordomo info at http://vger.kernel.org/majordomo-info.html >> >> Hi Jens, >> >> Does this mean that if we create the files with appropriate names and >> size before starting fio, then fio will not lay them out explicitly? >> Just confirming .. this will be very useful (reduce runtime) when >> performing tests on large filesystems. > > It does, yes, or you can just use this create_only option for the same > effect. > > Fio uses repeatable file names, it always has. > > -- > Jens Axboe > I guess my question was is that if I created the files using some other method other than create_only option, will this still work ? Will fio look for needed files and skip layout step if they already exist? Vikram -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
