• Subject: RE: FTP 400 to 400 toooo slooow
  • From: bdietz@xxxxxx
  • Date: Sun, 28 Mar 1999 08:39:16 -0500



In regards to tuning the line, I looked at it before I started and it was
"tweaked".  My biggest problem with the speed is that
if I sent or recieved to/from my PC from/to the 400 the speed was great.  I just
can't figure out why 400 to 400 is so darn slow.
It seems that there is some kind of overhead that "doubles" if the sending and
recieving systems are 400's.

Bryan Dietz
3X Corp.










"Murphy, Guy" <murphy@uif.uillinois.edu> on 03/24/99 09:30:34 AM

Please respond to MIDRANGE-L@midrange.com
                                                                                
                                                                                
                                                                                


                                                              
                                                              
                                                              
 To:      "'MIDRANGE-L@midrange.com'"                         
          <MIDRANGE-L@midrange.com>                           
                                                              
 cc:      (bcc: Bryan Dietz/Columbus/3X Corp)                 
                                                              
                                                              
                                                              
 Subject: RE: FTP 400 to 400 toooo slooow                     
                                                              








     What's the speed of your slowest communications card?  What else is
on the FDDI besides your 400s?  If your slowest card is a 10Mbit ethernet
card, you are doing pretty good.  The max bytes you could put through that
card is about 1250 Kbyte, which includes all of the tcp/ip overhead.
     If you are using ethernet cards, you might want to tweak your line
description(s) to use duplex and set your frame size to the maximum,
depending on what your network supports.
That might get you some improvement.  The max I've ever seen our 10Mbit card
ever do was 1063 Kbytes at 4 in the morning with the wind at its back.

Guy Murphy
University of Illinois
FACTS system
217-333-8670
murphyfa@uiuc.edu


-----Original Message-----
From: Larry Bolhuis [mailto:lbolhui@ibm.net]
Sent: Tuesday, March 23, 1999 11:07 PM
To: MIDRANGE-L@midrange.com
Subject: Re: FTP 400 to 400 toooo slooow


Brian,

 We tested FTP across the FDDI loop this morning.  Sad to say performance
was a
lowly 900KB/sec.  We sent a 20MB file across from a 310-2044 at V3R2 with no
users active to a 530-Quad at V4R2 with the CPU at 25%.  Pretty pathetic
again!

 Any explenations out there?

 - Larry

Larry Bolhuis wrote:
>
> Brian,
>
>   Wish I could answer the questions but I have seen the same thing.  We
FTPd
> some 40MB files from a 300(V3R2) to a 620(V4R3) both boxes dedicated and
got
> about the same throughput - pathetic.  I routinely get 600+ kb/sec to my
laptop
> on 10mb!
>   On the other hand we sent some big (100MB) save files via SNADS across
FDDI
> (310-dual to 530-quad) and watched entire files transfer in seconds.
(couldn't
> get a reading on the actual throughput but it was well over 50Mb/Sec)  I'm
gonna
> try FTP over the FDDI and see what I can get there. I should be able to
give it
> a try on Tuesday.
>
>   - Larry
>
> bdietz@3x.com wrote:
> >
> > A couple of days ago I had to ftp some large(300 meg +) save files from
one
> >  400 to another(no tape compatability).
> > Here is what I found and wonder if anybody else has expirenced this.
> >
> > Sending system  150
> > recieving system 720
> > 10 mb ethernet -  very low utilization.
> >
> > I set up a simple CL to read through a list of libraries and save the to
a
> > save file then FTP them to another system.
> > The times I ran into were in the 3.69 kb/sec  for 400 to 400 transfers.
> > Not having that much time to wait I started my FTP server on my PC and
> > tried a couple, and got throughput times
> > of 300 kb/sec. both sending and recieving.
> >
> > My question is why is it so slow 400 to 400???
> >
> > 400 to PC and then PC to 400 beat the pants(skirts) off of 400 to 400
> > transfers.
> >
> > I also tried using ObjConnect and it did not work any faster.
> >
> > I looked into the MTU setting on the lines and saw nothing outta the
> > ordinary.
> >
> > Comments??
> >
> > Bryan Dietz
> > 3X Corp.
> >
> > +---
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> --
> Larry Bolhuis         |
> Arbor Solutions, Inc  | Two rules to success in life:
> (616) 451-2500        | 1. Never tell people everything you know.
> lbolhui@ibm.net       |
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--
Larry Bolhuis         |
Arbor Solutions, Inc  | Two rules to success in life:
(616) 451-2500        | 1. Never tell people everything you know.
lbolhui@ibm.net       |
+---
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