Very bad performance when copying large files from windows to samba-share

[Lars Heineken]

Let me summarize what we have:

-Win98 doing a write request to the last byte of the file to be copied
-My machine creates a tempfile of that size and if that takes too long  we get a timeout

-> My questions: What is samba doing if strict allocate is set to "no", is it ignoring the write request ?
                 Does it pass the write request on to the system, and the kernel creates the tempfile ?
		 What can I do to check who's fault the creation of the tempfile is ?

 

On Mon, 24 Jun 2002 22:13:12 +0200
Lars Heineken <Lars.Heineken at gmx.de> wrote:

> Y
> ou're right, the machine is filling up a tempfile. During the pause between write-request and writing my machine has heavy disk activity.  When I copy a very large file (large than this one) the win-client times out after 60 seconds and a file containing zeros is stored where the copy should be (with exactly the size of the copy). The Samba-Server behaves like "strict allocate" was set to "yes" . But it's turned of.. Maybe Samba isn't recognizing (or minding) the option ?
> 
> On Mon, 24 Jun 2002 12:36:19 -0700
> "MCCALL,DON (HP-USA,ex1)" <don_mccall at hp.com> wrote:
> 
> > 
> > Interesting;
> > it's fairly obvious  from the trace that your server is doing SOMETHING for
> > the ~45 seconds
> > between the initial smb write request of 0 bytes at offset whatever, and the
> > evenuual reply.
> > I am not familiar with the version of unix you are using (I'm an HPUX guy
> > myself) but I would 
> > concentrate at this point on finding some tool like sar, or something that
> > would let you see
> > WHAT's going on ON THE BOX during these 45 seconds of apparent network
> > inactivity.  Even something
> > as simple as doing repetitive du's or lls on the directory where the file is
> > being created, and watch
> > for block/file increases during this time would tell you if your os is
> > 'filling up' space for the 
> > write...
> > Just a thought,
> > Don
> > -----Original Message-----
> > From: Lars Heineken [mailto:Lars.Heineken at gmx.de]
> > Sent: Monday, June 24, 2002 14:49
> > To: samba-technical at lists.samba.org
> > Cc: don_mccall at hp.com; ulf.bertilsson at adcomdata.no
> > Subject: Re: Very bad performance when copying large files from windows
> > to samba-share
> > 
> > 
> > .. I stumbled over this option before and these are a few Lines from my
> > smb.conf:
> > 
> > 
> > # Security mode. Most people will want user level security. See
> > # security_level.txt for details.
> >    security = share
> >    write raw = no
> >    strict allocate = No
> > # Use password server option only with security = server or security =
> > domain
> > # When using security = domain
> > 
>