Re: [Lsf-pc] [LSF/MM TOPIC] async buffered diskio read for userspace apps

[Jeremy Allison <jra@samba.org>]

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 ?

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.

Cheers,

	Jeremy.