On Fri, 10 Nov 2006, David Harrison wrote:
On 10/11/2006, at 12:22 PM, John Drescher wrote:
On 11/9/06, David Harrison <[EMAIL PROTECTED]> wrote:
- BUT OSX Tiger to Samba 3.0.23C (Suse 10) file transfers operate at
1-2meg/second which is well down from expected performance.
The strange thing is if I begin a file transfer from OSX Tiger to
Samba and in a terminal window on OSX begin an SCP copy operation to
the same Suse server the file transfer speed of Samba jumps up to
gigabit level speeds. As soon as the SCP copy operation is stopped
the Samba file transfer process drops to 1-2meg/second again.
Looking at your numbers I believe that you have both network and samba
problems.
Can you run netperf or do some nfs testing?
Today I ran it and found out a few of my servers (using nvidia mobo
adapters) although the gigabit light was on the nic and the switch the
adapter was not transfering at gigabit speeds. I did a nfs test like the
following:
dd if=/dev/zero of=/mnt/remoteserver/test.dat bs=16k count=16k
and got around 10MB/s which is only 100mbit speeds. On netperf I verified
that my maximum transfer rate was around 94mbit/s so I googled a bit and
then ended up upgrading my kernel to 2.6.18 and then did the same test and
I got 109 MB/s on netperf and on the nfs test above I got 43MB/s and after
setting nfs to asynchronous mode I got 57MB/s.
John
I've updated the Suse box to the 2.6.18.2 kernel with no effect.
I'm not in a position to run NFS tests on the machine but I'm guessing it is
the network card (low-end Netgear with the r8169 driver).
To (hopefully) fix the problem for good I've ordered a decent gigabit card
that by the looks of it has good Linux support.
I'd rather spend the money than continue messing with a card/driver that
according to Google has some underlying performance issues :-)
Have you verified that the duplex settings on the network switch and the
Suse server are the same? If you have half duplex on the Suse server and
full duplex on the network switch, you could get the behavior you
describe.
Andy
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