[Samba] Third Try: Huge number of small files performance regression from 3.5.16 to 4.6.5 with identical smb.conf

[Jeremy Allison]

On Fri, Jul 14, 2017 at 07:56:11PM +0200, awl1 wrote:
> Hi again,
> 
> Am 14.07.2017 um 19:41 schrieb Jeremy Allison:
> >Start with a small, clean smb.conf file. This one is a horrible
> >mess looks like accumulated over many years.
> the complete content of the global section was provided by Thecus
> (who produced the NAS). Without "breaking into" the NAS through ssh
> as a "module developer", an end user is not even able to see the
> smb.conf file...

Yes, but I'm not Thecus support, I'm only helping you :-).

> So everything in the [global] section is nothing but Thecus'
> seemingly poor defaults (dating back from Samba 3.5.16) except one
> small change I did when I switched from "case sensitive = auto" to
> "case sensitive = true" in order to speed up the "write huge number
> of files into a single directory scenario" for the original Samba
> 3.5 some years ago.

Yes, but I'm guessing that some of the interactions
here with these smb.conf params have never been tested
with the move to SMB2.

> When you stated "the above" in your previous mail, did you only
> refer to the one line immediately above, or to the complete block of
> lines between two of your remarks?

One line.

> Just one example:
> >aio read size = 1
> >aio write size = 1
> >write cache size = 2097152
> You stated: "REMOVE THE ABOVE WITH PREJUDICE !!!!!"
> 
> So do you want me to remove just one line: "write cache size", or
> all three lines up to your previous comment?

Just the "write cache size".