[Samba] Transfer rates faster than 23MBps?

[Pitti, Raul]

i am not an expert, but,
do you have jumbo frame enabled on your nic and  switch?
try using ethtools...

RP

Mark Smith wrote:
> Mark Smith wrote:
>> As a data point, I'm going to try a newer version of Samba.  (RHEL4 
>> uses 3.0.10-RedHat-Heavily-Modified-Of-Course)  If that makes a 
>> difference, then I have to decide whether it's worth it to me to keep 
>> RedHat support or not.  (And when I say "I," I really mean "my 
>> management.")
> 
> I've just tried this.  Samba v3.0.23c, built locally from the Fedora 
> Source RPM as distributed at samba.org, makes no noticeable difference: 
>  still about 45 seconds.
> 
>>> I have lots of memory.  I use these configurations in sysctl.conf to 
>>> up the performance of send/recieve windows on my systems.  There's 
>>> articles out there.  I don't have historical references handy.
>>> YMMV.
>>> net.core.wmem_max = 1048576
>>> net.core.rmem_max = 1048576
>>> net.ipv4.tcp_wmem = 4096 65536 1048575
>>> net.ipv4.tcp_rmem = 4096 524288 1048575
>>> net.ipv4.tcp_window_scaling = 1
>>
>> I have not tried tweaking the TCP stack in the OS.  I'll give that a 
>> shot.
> 
> The person at RedHat who's handling my ticket just suggested these very 
> changes, without the last one.  They did not help.  The values he gave 
> were a little different:
> 
> ----- snip! -----
> # increase TCP maximum buffer size
> net.core.rmem_max = 16777216
> net.core.wmem_max = 16777216
> 
> # increase Linux autotuning TCP buffer limits
> # min, default, and maximum number of bytes to use
> net.ipv4.tcp_rmem = 4096 87380 16777216
> net.ipv4.tcp_wmem = 4096 65536 16777216
> ----- snip! -----
> 
> I also tried your values, with the tcp_window_scaling, with no luck.
> 
> -Mark

-- 
--------------------
Raúl Pittí Palma, Eng.

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