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

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.

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