samba - May 1999 - Bad smbclient put performance and smbfs write performance

Hi,

I've had extremely bad smbclient put performance when connecting from my
Linux
box to a Windows 95 box.  I only get about 10KBytes/s!  All other forms of data
transfer work fine, and I get from 600-700KBytes/s.  This is on a local 10BT
LAN.  I've seen a few other reports of this, but no solutions as of yet. 
smbclient does puts just fine to another Linux/Samba Server.  I'm using
Samba
2.0.3, the Linux machines are running kernel 2.2.7, glibc-2.1, egcs-1.1.2. 
I've two Win95 machines, both perform equally poorly.

I also have very bad smbfs write performance.  When doing a simple cp of a file
to the smbfs mounted directory results in performance of about 40KBytes/s. 
Reads from the file system are OK, but interactivity (like doing a 'ls'
on the
mounted directory) is extremely poor while doing either reads or writes.  In
this case, it doesn't matter what the OS of the server I'm mounting from
is.
Mounting a share from Win95 or from another Linux/Samba-2.0.3 machine gets the
same results.  I mount the share using this command for win95 (I don't have
the
w95 fixes compiled into the kernel) `smbmount //server/share -c 'mount
mntpoint
-f 3755'` and the same thing without the '-f 3755' when mounting
from another
Samba Server.  Interestingly, mounting a Samba share from the same machine gets
good performance.

I've dabbled with win95 registry settings, and smb.conf settings, but the
results are exactly the same no matter what I've tried.

Any help would be appreciated,
-Dave

David B. Rees wrote
> Date: Sat, 01 May 1999 02:08:40 -0700 (PDT)
> From: "David B. Rees" <dbr@spoke.nols.com>
> To: samba@samba.org
> Subject: Bad smbclient put performance and smbfs write performance
> Message-ID: <XFMail.990501020840.dbr@spoke.nols.com>
> 
> Hi,
> 
> I've had extremely bad smbclient put performance when connecting from
my Linux
> box to a Windows 95 box.  I only get about 10KBytes/s!  All other forms of
data
> transfer work fine, and I get from 600-700KBytes/s.  This is on a local
10BT
> LAN.  I've seen a few other reports of this, but no solutions as of
yet.
> smbclient does puts just fine to another Linux/Samba Server.  I'm using
Samba
> 2.0.3, the Linux machines are running kernel 2.2.7, glibc-2.1, egcs-1.1.2.
> I've two Win95 machines, both perform equally poorly.
> 
> I also have very bad smbfs write performance.  When doing a simple cp of a
file
> to the smbfs mounted directory results in performance of about 40KBytes/s.
> Reads from the file system are OK, but interactivity (like doing a
'ls' on the
> mounted directory) is extremely poor while doing either reads or writes. 
In
> this case, it doesn't matter what the OS of the server I'm mounting
from is.
> Mounting a share from Win95 or from another Linux/Samba-2.0.3 machine gets
the
> same results.  I mount the share using this command for win95 (I don't
have the
> w95 fixes compiled into the kernel) `smbmount //server/share -c 'mount
mntpoint
> -f 3755'` and the same thing without the '-f 3755' when
mounting from another
> Samba Server.  Interestingly, mounting a Samba share from the same machine
gets
> good performance.
> 
> I've dabbled with win95 registry settings, and smb.conf settings, but
the
> results are exactly the same no matter what I've tried.
> 
> Any help would be appreciated,
> -Dave
Hello,
It seems that your network is not correctly configurated. If in one
direction you have 600-700 Kb/s and in the other direction 10KB/s (or
even less) it could be a sign that your full/half duplex network
configuration is wrong. Sometimes when you use Autosensing this problem
appears. For example your server network card is on autosensing and your
switch on 10 HDX. Then you have a problem. Use only autonegotiation, or
use only fixed 10 or 100 hdx/fdx on both sides. You have to check ALL
the way from the server to client. Make ftp transfer with put and get
with one 1MB file and see what will happen. Connect server and client
with ONE CROSSED cable (both networks cards should have the same
configuration) and see what happen. If everything will be OK, than your
server and client are OK and you have to check you network. I had the
same problem already many times with different hardware and OS. Bay
Networks Autonegotiation didn't understand Cisco autonegotiation and Sun
100MB network card don't understand 3Com autonegotiation. 

I hope my advice will be usefull for you, all the best

Tomek

> From: "David B. Rees" <dbr@spoke.nols.com>
> To: samba@samba.org
> Subject: Bad smbclient put performance and smbfs write performance
> I've had extremely bad smbclient put performance when connecting from
my Linux
> box to a Windows 95 box.  I only get about 10KBytes/s!  All other forms of
data
> 2.0.3, the Linux machines are running kernel 2.2.7, glibc-2.1, egcs-1.1.2.
I believe this is a known issue with the new kernel
and smbfs/smbclient.  Check the kernel mail archives at
www.tux.org for related info.
--
Bill Eldridge
Radio Free Asia
bill@rfa.org

> No, I think this is an issue of samba 2.x.
> I've already posted about this twice on the list and once to
samba-bugs, I've
> never had an answer.
> 
> I'm on kernel 2.0.x, if I use smbclient 2.0.x to put to a pc I get a
very low
> low speed, If I put the same file with smbclient 1.9.x I get high speed.
> I did these test with the tar extensions of smbclient:
> 
> ====> A win95 pc, and a linux 2.0.33 with:
> 1) smbclient1.9.18 (patched to restore subdirs)
> 2) smbclient2.0.3.
> 
> On the win95 pc there's a share, this share contains a dir with:
> MB 4
> Files 142
> Subdirs 2
> 
> Tarring from the pc to the linux box takes:
> 1.9.18: 10sec
> 2.0.2/2.0.3: 10sec
> 
> Restoring from the linux box to the pc takes:
> 1.9.18: 10sec
> 2.0.2/2.0.3: 7min 30sec
> 
> The tar made with 2.0.2 is restored in 10sec if I use smbclient1.9.18.
> 
> I used:
> smbclient '\\pc\share' -N -Tc filename.tar
> smbclient '\\pc\share' -N -Tx filename.tar
I just confirmed that it indeed seems to be at the very least a 2.0.3 issue.  I
downloaded and compiled smbclient-1.9.18p8.

smbclient-1.9.18p8 results:

smb: \Testing\> put  egcs-1.1.2.tar.bz2
putting file egcs-1.1.2.tar.bz2 of size 8935740 bytes as
\Testing\egcs-1.1.2.tar.bz2 (859.396 kb/s) (average 855.64 kb/s)

smbclient-2.0.3 results:

smb: \Testing\> put inetutils-1.3b.tar.bz2
putting file inetutils-1.3b.tar.bz2 as \Testing\inetutils-1.3b.tar.bz2 (9.14902
kb/s) (average 9.14902 kb/s)


Yes, smbclient-2.0.3 is 10 times slower!  Needless to say, I'll be replacing
my
current smbclient with the one from the smbclient-1.9.18p8 distribution for now.


However, this still doesn't explain the poor smbfs write performance,
I'm
hoping someone will figure out a workaround for that soon.

-Dave

On our AIX machine I was able to improve performance by 4x by messing with
socket options.
Specifically, I use TCP_NODELAY SO_SNDBUF=32678 SO_RCVBUF=32678
Also I changed the read size to 65536.

Hope this helps...

>
>
> I've had extremely bad smbclient put performance when connecting from
my Linux
> box to a Windows 95 box.  I only get about 10KBytes/s!  All other forms of
data
> transfer work fine, and I get from 600-700KBytes/s.  This is on a local
10BT
> LAN.  I've seen a few other reports of this, but no solutions as of
yet.
> smbclient does puts just fine to another Linux/Samba Server.  I'm using
Samba
> 2.0.3, the Linux machines are running kernel 2.2.7, glibc-2.1, egcs-1.1.2.
> I've two Win95 machines, both perform equally poorly.
>
> I also have very bad smbfs write performance.  When doing a simple cp of a
file
> to the smbfs mounted directory results in performance of about 40KBytes/s.
> Reads from the file system are OK, but interactivity (like doing a
'ls' on the
> mounted directory) is extremely poor while doing either reads or writes. 
In
> this case, it doesn't matter what the OS of the server I'm mounting
from is.
> Mounting a share from Win95 or from another Linux/Samba-2.0.3 machine gets
the
> same results.  I mount the share using this command for win95 (I don't
have the
> w95 fixes compiled into the kernel) `smbmount //server/share -c 'mount
mntpoint
> -f 3755'` and the same thing without the '-f 3755' when
mounting from another
> Samba Server.  Interestingly, mounting a Samba share from the same machine
gets
> good performance.
>
> I've dabbled with win95 registry settings, and smb.conf settings, but
the
> results are exactly the same no matter what I've tried.
>
> Any help would be appreciated,
> -Dave