[Samba] File xfer speed issues with MacOS X 10.2 and 10.3

Mark Ferlatte ferlatte at cryptio.net
Thu Nov 6 18:40:04 GMT 2003


Hi all,

I have a mixed environment of Windows 2000, XP, Linux, and MacOS X clients
connecting to various Samba servers.  Our network is 100Mbit switched ethernet.

Originally, we were using samba 2.2.8a, with the socket options of TCP_NODELAY
SO_SNDBUF=4096 SO_RCVBUF=4096.  However, the MacOS X clients (which were added
after the initial setup and testing), had horrible file xfer performance;
somewhere around 100kbit/second, while the Windows clients were much faster.

The first response was to upgrade to samba 3.0.0, which didn't affect the
problem one way or another.  However, setting the SNDBUF and RCVBUF to 8192
did.  With the socket buffers at 8k, all of the Macs are happy, and getting
Mbit speeds easily.

Has anyone else experienced this?  Can anyone explain why server socket buffers
would have such a large effect on the client?

M
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