We use SMB to transfer large files (between 1GB and 5GB) from RedHat AS4
Content Storage servers to Windows clients with 6 DVD burners and
robotic arms and other cool gadgets. The servers used to be Windows
based, but we're migrating to RedHat for a host of reasons.
Unfortunately, the RedHat
Jeremy Allison wrote:
An interesting thing you could do is to use a port of smbclient
on Windows (no I don't know where to get one :-) to copy the
client to the Windows client in userspace. smbclient will use
read pipelining (ie. issue more than one read at a time) whereas
Windows clients issue o
bclient and it reported a transfer rate of
21MBps, about the same as a normal smbfs mount. I haven't tried porting
smbclient to Windows yet, and probably won't until we get more info on
what the server is doing.
Thanks everyone.
-Mark
Mark Smith wrote:
We use SMB to transfer lar
Doug VanLeuven wrote:
OK, I'll top post.
I can't let this stand unanswered.
I ran a LOT of tests with gigabit copper and windows machines. I never
did better than 40 seconds per gig. That was with the Intel cards
configured for maximum cpu utilization. 80-90% cpu for 40 sec per gig.
On win
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
at
this point.
-Mark
Pitti, Raul wrote:
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
Doug VanLeuven wrote:
Mark Smith wrote:
I also tried your values, with the tcp_window_scaling, with no luck.
It's enable by default, but I explicitly set options other options
depend on.
Reasonable idea. :)
I set up my test rig again.
Host server
2.6.12-1.1376_FC3, samba 3.0.23
Bro
Guenter Kukkukk wrote:
Hi Doug,
have you ever tried netio to check for raw needwork speed?
http://www.ars.de/ars/ars.nsf/docs/netio
It does not add any overhead caused by file operations - so it
can help to tune raw parameters.
The source is included - so it can be tuned, too.
When sniffing such
Mark Smith wrote:
Actually, setting SNDBUF and RCVBUF to 65536 from the default of 8192 is
what got me _TO_ 22MBps...
...Ya know, I once tried increasing SNDBUF and RCVBUF to 256k but didn't
see any difference. I've also tried setting the kernel parameters to
256k, but never b
ot y'all's fault. :)
Again, thanks everyone for your help. Cheers.
-Mark
Mark Smith wrote:
We use SMB to transfer large files (between 1GB and 5GB) from RedHat AS4
Content Storage servers to Windows clients with 6 DVD burners and
robotic arms and other cool gadgets. The servers used to
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