Slowdown when copying large files

[Andrew Perrin - Demography]

This question would really be better asked on the general samba newsgroup
(comp.protocol.smb) or on the samba general mailing list -- people who
hang out here are usually concerned specifically with Samba as an NT
domain server.

---------------------------------------------------------------------
Andrew J. Perrin - aperrin at demog.berkeley.edu - NT/Unix Admin/Support
Department of Demography    -    University of California at Berkeley
2232 Piedmont Avenue #2120  -    Berkeley, California, 94720-2120 USA
http://demog.berkeley.edu/~aperrin --------------------------SEIU1199

On Fri, 24 Jul 1998, Michael Anthon wrote:

> I am currently investigating using samba on a Linux box to provide file
> server services on our NT LAN (I'm a bit sick of NT doing dummy spits on
> me).  I'm running RH5.1, and have just upgraded samba to
> samba-1.9.18p8-51.3 (using the rpm from
> http://samba.anu.edu.au/samba/ftp/Binary_Packages/redhat/RPMS/5.1/samba-
> 1.9.18p8-51.3.i386.rpm)
> 
> The setup includes several NT servers, one set up as a PDC and 2 BDCs
> and samba is confiigured to use the PDC for password authentication.
> 
> Everything seems to work fine, except that when I try copying a largeish
> file (the test one I'm using is about 12M) it takes about 8-10 minutes
> to copy (this is on a 10M LAN).  I ran top on the Linux box while I was
> doing this and smbd seems to start off using around 8% of CPU time, but
> at the point things seem to start slowing down, the usage jumps up to
> 75-80%.
> 
> I'm wondering if this is a known problem and if it's not, perhaps a few
> pointers on where to start looking might help me a bit.
> 
> TIA
> Michael Anthon
> 
> TAMS Systems
>