On Mon, Mar 02, 2009 at 05:33:49PM +0100, Tomasz Lutelmowski wrote: > Hello, > > I'm trying to squeeze out maximum possible transfer between two Samba 3.3.1 > servers. Both servers and switch supports jumbo frames, network link and > disks does not appear to be bottleneck, between these two servers FTP > transfer rates are about 115MB/s (1gbit link is saturated at this point) - > and I'd like to see similar transfer from Samba (now I get half of it). > > 10.0.0.5 # wget ftp://10.0.0.2/1G > 100%[=================================================================================================================>] > 1,048,576,000 118M/s in 8.5s > 2009-02-27 09:16:00 (118 MB/s) - `1G' saved [1048576000] > > > Also testing samba locally, it gives me transfer via loopback of over > 300MB/s > > 10.0.0.2 # smbclient '\\10.0.0.2\test\' xxx -U xxx -c 'GET 1GB' > WARNING: The "write cache size" option is deprecated > Domain=[EPW] OS=[Unix] Server=[Samba 3.3.1] > getting file \1GB of size 1048576000 as 1GB (331177.2 kb/s) (average > 331177.2 kb/s) > > > Now, when I try to get this file from another server (10.0.0.5), maximum > transfer drops to 55MB/s.... > > 10.0.0.5 # smbclient '\\10.0.0.2\test\' xxx -U xxx -c 'GET 1GB' > Domain=[EPW] OS=[Unix] Server=[Samba 3.3.1] > getting file \1GB of size 1048576000 as 1GB (55664.3 kb/s) (average 55664.3 > kb/s) > > > So far, I was turning these knobs: > > socket options = TCP_NODELAY SO_RCVBUF=262144 SO_SNDBUF=262144 > max xmit = 131072 > block size = 4096 > aio read size = 1 > aio write size = 1 > use mmap = No > use sendfile = Yes > blocking locks = No
What do you get without any of these? And, are you 100% sure you've got a 3.3.1 smbclient? Volker
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