On 01/19/2015 07:18 AM, Milosz Tanski wrote:
On Mon, Jan 19, 2015 at 2:34 AM, James Bottomley
<James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> wrote:
On Sun, 2015-01-18 at 23:12 -0800, Jeremy Allison wrote:
On Sun, Jan 18, 2015 at 10:49:36PM -0500, Milosz Tanski wrote:
I have the first version of the FIO cifs support via samba in my fork
of FIO here: https://github.com/mtanski/fio/tree/samba
Right now it only supports sync mode of FIO (eg. can't submit multiple
outstanding requests) but I'm looking into how to make it work with
smb2 read/write calls with the async flag.
Additionally, I'm sure I'm doing some things not quite right in terms
of smbcli usage as it was a decent amount of trial and error to get it
to connect (esp. the setup before smbcli_full_connection). Finally, it
looks like the more complex api I'm using (as opposed to smbclient,
because I want the async calls) doesn't quite fully export all calls I
need via headers / public dyn libs so it's a bit of a hack to get it
to build: https://github.com/mtanski/fio/commit/7fd35359259b409ed023b924cb2758e9efb9950c#diff-1
But it works for my randread tests with zipf and the great part is
that it should provide a flexible way to test samba with many fake
clients and access patterns. So... progress.
One problem here. Looks like fio is under GPLv2-only,
is that correct ?
Seems so from the LICENSE file.
If so there's no way to combine the two codebases,
as Samba is under GPLv3-or-later with parts under LGPLv3-or-later.
fio needs to be GPLv2-or-later in order to be
able to use with libsmbclient.
That's one of these pointless licensing complexities that annoy
distributions so much ... they're both open source, so there's no real
problem except the licence incompatibility. The usual way out of it is
just to dual licence the incompatible component.
James
Sadly, in this case there's nothing I can do about the license; both
projects have a right to determine their own licensing. Hopefully, the
parties can come to some kind of agreement since it would be
beneficial to use fio to test samba.
This works well enough for me to test test preadv2 using samba and get
numbers. So I'll use this to do some preadv2 testing using samba for
different workloads.
I didn't look at your code yet, but I'm assuming it's a self contained
IO engine. So we should be able to make that work, by only linking the
engine itself against libsmbclient. But sheesh, what a pain in the butt,
why can't we just all be friends.
So don't worry about licensing for now, just work on improving the
engine and we'll sort the non-technical details out.
--
Jens Axboe
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