[Samba] Unusable performance over WAN (part 2)
jlamanna at gmail.com
Sat Oct 6 22:31:46 GMT 2007
On 10/6/07, Doug VanLeuven <roamdad at sonic.net> wrote:
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> James Lamanna wrote:
> > Hi all,
> > Disregard my previous posts, I've consolidated everything here.
> > I'm having terrible performance issues with samba over a WAN
> > (point-to-point T1 link).
> > Doing a copy of a 2MB file from a samba server to a linux client
> > running smbclient takes over 5 minutes.
> > SCPing the same file takes seconds.
> > The server is running samba version 3.0.25c with kernel 188.8.131.52.
> > I've put up a set of debugging logs at:
> > http://emagiccards.com/james/sambalogs.tar.bz2
> > Inside are 3 files:
> > smb.conf - the configuration of the samba server
> > log.agard - the level 10 debug log of the copy from samba
> > samba-tcpdump.log - a tcpdump log from the client side of the copy
> > Any help to fix this issue would be greatly appreciated since the file
> > server is pretty unusuable over the WAN.
> > If you need any more information, please let me know. It is imperative
> > that I find out what's happening here.
> Well, there's always paid support. See the samba web site.
> testparm yeilds 1 error and 1 warning.
> Unknown parameter encountered: "show preserve case"
> Ignoring unknown parameter "show preserve case"
> should probably be "short preserve case"
> Server's Role (logon server) NOT ADVISED with domain-level security
> Loaded services file OK.
> Server role: ROLE_DOMAIN_BDC
> When I specifically want samba to use an IP address, I use the IP
> address in the interfaces clause. eth1 can change when replacing
> network cards.
> I've used cifs over WAN a lot over the years. It is slower than ftp and
> scp but there shouldn't be breaks waiting for ACK. You'll not want to
> hear it, but this is almost always a network issue; card, router,
> switch, WAN link box, etc.
> I like larger packets for most of the uses of a server. So I add to
> "socket options" SO_SNDBUF=65536 SO_RCVBUF=65536
> Regards, Doug
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If it was a hardware issue, why would SCP work flawlessly (as far as I
Both machines have Broadcom BCM5704 NICs.
I'll play with the socket options some more and see if it helps.
But yeah, the delayed response to the ack is troubling.
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