RE: FTP file size limitation?

Oh, curse me for a novice!  I did say if my math was right!  The speed
you got (7228.510 KB/sec) equates to 58Mb/s, so over Virtual Ethernet
with 8996 frame (about 500Mb/s), I'd expect it to transfer in 582
seconds, or about 9 minutes.  

In my tests with a 650MB file, it went in about 11 seconds.  Please
ignore my previous miscalculation.

 
 
Jeff Carey
Acxiom Corp.
Phone: 630-944-0216
Fax:  630-944-8941
Pager: jeff_carey@xxxxxxxxxxxxxx
Vote for me for COMMON Board of Directors:
http://www.common.org/about/carey.html

-----Original Message-----
From: midrange-l-bounces+jeff.carey=acxiom.com@xxxxxxxxxxxx
[mailto:midrange-l-bounces+jeff.carey=acxiom.com@xxxxxxxxxxxx] On Behalf
Of Carey Jeff - jcarey
Sent: Tuesday, May 16, 2006 3:37 PM
To: Midrange Systems Technical Discussion
Subject: RE: FTP file size limitation?

That good - well, my tests were with 650MB files, so I can see why a
bigger file might be better. 

What was the link?  Ethernet or Virtual?  100MB or 1GB?

 
 
Jeff Carey
Acxiom Corp.
Phone: 630-944-0216
Fax:  630-944-8941
Pager: jeff_carey@xxxxxxxxxxxxxx
Vote for me for COMMON Board of Directors:
http://www.common.org/about/carey.html

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
ChadB@xxxxxxxxxxxxxxxxxxxx
Sent: Tuesday, May 16, 2006 3:32 PM
To: Midrange Systems Technical Discussion
Subject: RE: FTP file size limitation?

My 35gb file just finished... here are the stats (took roughly 1:20):

150 Sending file to member TESTSAV in file TESTSAV in library TESTSAVF.
250 File transfer completed successfully.
36347186304 bytes transferred in 5028.310 seconds. Transfer rate
7228.510
KB/sec.


 

             "Carey Jeff -

             jcarey"

             <Jeff.Carey@acxio
To 
             m.com>                    "Midrange Systems Technical

             Sent by:                  Discussion"

             midrange-l-bounce         <midrange-l@xxxxxxxxxxxx>

             s@xxxxxxxxxxxx
cc 
 

 
Subject 
             05/16/2006 04:24          RE: FTP file size limitation?

             PM

 

 

             Please respond to

             Midrange Systems

                 Technical

                Discussion

             <midrange-l@midra

                 nge.com>

 

 





I've found FTP times are determined by many factors, chief of which is
how you are connected.

LPAR's using Virtual Ethernet or Virtual OptiConnect (or "real"
OptiConnect, for that matter) will outperform those going over a LAN,
usually.

I've also found that on 8xx boxes, Virtual OptiConnect outperforms
Virtual Ethernet, but the opposite is true on i5's.

In either case, the system processing and memory load can affect
transfers as well.

In my own tests on i5, for instance, I got an effective rate (that is
actual data across the pipe - meaning effective rate of 1Mb/s would mean
a 1Mb (Mbits, so about 125MB) file took 1 second to FTP) of about
500Mb/s for Virtual Ethernet (using the jumbo frame size of 8996) and
about 400 Mb/s for Virtual OptiConnect.  Virtual Ethernet with the
default frame size of 1496 was a bit over 300Mb/s.

So at the fastest of those rates, a 35GB file (a.k.a. 286720 M bits)
would take about 9 hours to FTP (if my math is right!).



Jeff Carey
Acxiom Corp.
Phone: 630-944-0216
Fax:  630-944-8941
Pager: jeff_carey@xxxxxxxxxxxxxx
Vote for me for COMMON Board of Directors:
http://www.common.org/about/carey.html

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of fbocch2595@xxxxxxx
Sent: Tuesday, May 16, 2006 12:58 PM
To: midrange-l@xxxxxxxxxxxx
Subject: Re: FTP file size limitation?

Can you give me a time estimate on how long those large files took to
ftp?


-----Original Message-----
From: Chris Bipes <chris.bipes@xxxxxxxxxxxxxxx>
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Sent: Tue, 16 May 2006 10:29:58 -0700
Subject: RE: FTP file size limitation?


I sent bigger files between the systems.


Christopher Bipes
Information Services Director
CrossCheck, Inc.

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
ChadB@xxxxxxxxxxxxxxxxxxxx
Sent: Tuesday, May 16, 2006 10:28 AM
To: Midrange Systems Technical Discussion
Subject: Re: FTP file size limitation?


OK... i'll bump this one, maybe I caught people at lunch.

Is a 35gb file FTP'd between 2 iSeries boxes an outlandish proposition?

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