It's failing when there are no files exist in the directory. If I have files that already exist, it's working. I think that's expected as it defaults to read if --rw is not specified. Will try the -git latest and let you know. On Wed 3 Aug, 2016, 11:54 PM Jens Axboe, wrote: > On 08/03/2016 08:42 AM, Jens Axboe wrote: > > On 08/02/2016 07:29 AM, Srinivasa Chamarthy wrote: > >> Hi All, > >> > >> With the latest version of FIO, i see that create_on_open failing > >> always with error "err=5/file:backend.c:498" > >> > >> # fio --name=test --directory=/testdata --nrfiles=10 --size=1g > >> --refill_buffers=1 --direct=1 --create_on_open=1 > >> test: (g=0): rw=read, bs=4K-4K/4K-4K/4K-4K, ioengine=psync, iodepth=1 > >> fio-2.13-28-g059b6 > >> Starting 1 process > >> fio: pid=8439, err=5/file:backend.c:498, func=full resid, > >> error=Input/output error > >> > >> test: (groupid=0, jobs=1): err= 5 (file:backend.c:498, func=full > >> resid, error=Input/output error): pid=8439: Tue Aug 2 10:24:08 2016 > >> cpu : usr=0.00%, sys=0.00%, ctx=1, majf=0, minf=57 > >> IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, > >> >=64=0.0% > >> submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, > >> >=64=0.0% > >> complete : 0=50.0%, 4=50.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, > >> >=64=0.0% > >> issued : total=r=1/w=0/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0 > >> latency : target=0, window=0, percentile=100.00%, depth=1 > >> > >> Run status group 0 (all jobs): > >> > >> Disk stats (read/write): > >> dm-0: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%, > >> aggrios=0/0, aggrmerge=0/0, aggrticks=0/0, aggrin_queue=0, > >> aggrutil=0.00% > >> sda: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00% > >> > >> # fio --version > >> fio-2.13-28-g059b6 > >> > >> The execution was on RHEL7.2 and CentOS7.2 > > > > Did that ever work for readable workloads? For a writeable workload it > > should be fine. > > I take it back, it should still work. Try current -git, I think I fixed > it for you. > > -- > Jens Axboe > >