[Samba] Fwd: SMB question

[Volker Lendecke]

Hi!

Search the net for "SMB oplocks". User2 does not get one, so
it uses smaller chunks.

Volker

On Wed, Jul 30, 2014 at 09:41:33AM +0000, Uri Abramson wrote:
> Hi, I sent you an email but now when I read it again, it looks like there
> were some mistakes in it... Please ignore that and address only the
> following message:
> 
> 
> Hi,
> I don't know if this is the right place to ask, but I really couldn't find
> it anywhere on the web and if you could only provide me with a quick hint,
> it would be really helpful!
> 
> I'm experiencing the following problem with the SMB file share protocol:
> 1. User1 logs into windows.
> 2. User1 loads a file (from a network share) and works on it
> 3. User2 logs into windows on a different machine.
> 4. User2 loads the same file (from the same location on network) but the
> loading of the file is much much slower. When check the network traffic for
> User2 during the loading of the file (using WireShark) I can see that the
> file is devided into much smaller packets than it was when User1 loaded it.
> This behaviour is reproducable 80% of the times.
> 
> User1 ALWAYS gets the file much faster than User2 and the packet sizes for
> the file when User1 downloads it are ALWAY larger, my assumption is that
> this is what causing the slow transfer.
> 
> My question is, does it make sense that the file would be devided into much
> smaller packets when a second user accesses it over network?
> If you, do you have a recommendation how I can improve this behaviour to
> make User2 get the file just as fast as User1?
> 
> Again, any hint woul dbe greatly valued... Thanks a lot for taking the time
> to read my email!
> 
> 
> ---------- Forwarded message ----------
> From: Uri Abramson <abramson.uri at gmail.com>
> Date: Tue, Jul 29, 2014 at 2:11 PM
> Subject: SMB question
> To: jra at samba.org
> 
> 
> Hi,
> I don't know if this is the right place to ask, but I really couldn't find
> it anywhere on the web and if you could only provide me with a quick hint,
> it would be really helpful!
> 
> I'm experiencing the following problem with the SMB file share protocol:
> 1. User1 logs into windows.
> 2. User1 loads a file (from a network share) and works on it
> 3. User2 logs into windows on a different machine.
> 4. User2 loads the same file (from the same location on network) but the
> loading of the file is much much slower. When checking it using WireShark,
> I can see that the packets transfered are devided into much small pieces
> that the file was devided into when loaded by User1.
> 
> Do you have any idea what this could be? again, any hint woul dbe greatly
> valued... thanks!
> -- 
> To unsubscribe from this list go to the following URL and read the
> instructions:  https://lists.samba.org/mailman/options/samba

-- 
SerNet GmbH, Bahnhofsallee 1b, 37081 Göttingen
phone: +49-551-370000-0, fax: +49-551-370000-9
AG Göttingen, HRB 2816, GF: Dr. Johannes Loxen
http://www.sernet.de, mailto:kontakt at sernet.de