RE: Why is the iSeries so slow

["Joe Pluta" <joepluta@xxxxxxxxxxxxxxxxx>]

> From: Ken.Slaugh@xxxxxxxxxx
> 
> My current calculations result in a 4gig file taking 15 hours to FTP
from
> the iSeries to the PC client's hard drive. Is this for real? Are there
any
> tweaks to make this process more reasonable?

Something ain't right there, hoss.  You're throughput is well under
1MBit.

A 4GB file is 32,000 megabits.  (Note megabits, not megabytes).  Divide
that by 54,000 seconds (15 hours), and you get a throughput of about
half a MBit/second.  This does not compute, Will Robinson.

Let's say you only have a 10MBit network.  That means it should take
(discounting ack/nak delays) roughly 3200 seconds, or a little under an
hour to transfer 4GB.  On a 100MBit network, you're talking a few
minutes.

Now, throw in some delays and normal network traffic, and things stretch
out a little, but not that much.  I regularly transfer hundreds of files
between my iSeries and my network PCs using the MGET command of FTP.
The most recent run included over 400 files totaling 2.5GB.  On a
non-dedicated 100MBit connection, even including the overhead for
opening and closing 400 files, it still only took about 15 minutes, for
a throughput of about 22MBit/sec.

I don't know what's going on at your place, but it's not because the
iSeries is "not capable of handling" FTP.

Joe