[Samba] Urgent -Please comment

Bill Moran wmoran at potentialtech.com
Sat Feb 9 15:51:04 GMT 2002

Javid Abdul-AJAVID1 wrote:
> We are copying large files off of Unix Server on to PC.

What kind of "unix"? It's important.

> These file avg size
> are 600MB but about 5 to 6 of these files ( image files ) on to PC from Unix
> through CDWriter software.
> Now these 5 to 6 image files are being copies simultaneusly.
> image file storage data is nfs mounted.

This could be your problem.  I've seen terrible performance problems with
NFS under many conditions.  If the link between the NFS server/client isn't
reliable, performance sucks.  Are ping times between the two consistent?
Do "ping -c10 server.address" from the client, then look at the stddev field
in the result.  If it's higher than about 10% of the average ping time, then
you'll probably have performance trouble with NFS (this is my personal experience).

Actually, even if your link is very good, I've had nothing but trouble trying
to jump from SMB to NFS and back.  Can you log directly into the machine via
SMB instead of going SMB->NFS?  You may see a dramatic improvement.

> samba version 2.2.1  and 2.0.7
> some times its very very slow and sometimes its freezes the system

Freezes what system? The PC or the UNIX server?

> I am not seeing any errors in samba logs and no networkerrors.
> could this be anything else?

Yes, NFS generally sucks.

> Is there a limitation of samba for copying files, like am doing around 3 gig
> simultaneuly via this single samba server.

Not that I've ever come up against.  However, if you don't have enough RAM in
the servers in question, you can bog the thing down very badly trying to copy
that much data at once.

Bill Moran
Potential Technology

More information about the samba mailing list