[Samba] Very slow transfers to Samba on Ubuntu

Raghu A raghua1111+nabble at gmail.com
Tue Jun 23 17:38:28 GMT 2009

I mounted a samba volume on XP. XP and Ubuntu are connected over 100Mbps
ethernet (router).

I am writing a 4GB file from XP to Ubuntu and the transfer is extremely slow
: only around 1-1.5 MB/s.

This is not a network or disk issue since at the same time this transfer is
gonig on, I can scp the same file from XP to Ubuntu at 3-4 times faster
(around 6MB/s).

What could be wrong? Even for this slow transfer, smbd seems to be taking
quite a bit CPU (more than sshd for the transfer rate).

Reading from Ubuntu on this Samba volume is not much faster. only above

It is pretty surprising. Please let me know if you need any more info about
the problem.

The only changes I made to smb.conf are for adding shares. I have latest
Ubuntu Jaunty packages.

FYI: netstat on the connection from XP on Ubuntu shows around 1K of data on
receive buffer. Seems to indicate smbd is not processing fast enough.


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