Error while running fio on a samba share

Error while running fio on a samba share

[Stefano Doni]

Hi Jens,

First of all many thanks for this great tool!


I wanted to test the performance of a samba network share with fio,
file server access pattern.

I can execute it on a local directory without any issue. Too bad, that
is not the case when I run fio on a directory mounted from a samba
share.

I get this error:


ste@ubuntu:~/.gvfs/fio on localhost$ ~/Downloads/fio-1.50/fio
~/iometer-file-access-server.ro --timeout=120
iometer: (g=0): rw=randread, bs=512-64K/512-64K, ioengine=sync, iodepth=64
fio 1.50
Starting 1 process
fio: pid=4999, err=22/file:filesetup.c:495, func=open(iometer.1.0),
error=Invalid argument


Run status group 0 (all jobs):


I even tried to use a normal sync engine, but the error is still there.


Any idea?


Many thanks in advance.

Re: Error while running fio on a samba share

[Jens Axboe]

On 2011-01-28 23:34, Stefano Doni wrote:
> Hi Jens,
> 
> First of all many thanks for this great tool!
> 
> 
> I wanted to test the performance of a samba network share with fio,
> file server access pattern.
> 
> I can execute it on a local directory without any issue. Too bad, that
> is not the case when I run fio on a directory mounted from a samba
> share.
> 
> I get this error:
> 
> 
> ste@ubuntu:~/.gvfs/fio on localhost$ ~/Downloads/fio-1.50/fio
> ~/iometer-file-access-server.ro --timeout=120
> iometer: (g=0): rw=randread, bs=512-64K/512-64K, ioengine=sync, iodepth=64
> fio 1.50
> Starting 1 process
> fio: pid=4999, err=22/file:filesetup.c:495, func=open(iometer.1.0),
> error=Invalid argument
> 
> 
> Run status group 0 (all jobs):
> 
> 
> I even tried to use a normal sync engine, but the error is still there.

It looks like O_DIRECT is not supported for CIFS, since it fails on the
open. It will probably work if you change the direct=1 to direct=0 in
the job file you use.

-- 
Jens Axboe