RE: Why is the iSeries so slow

Ken -

Try running a Resource Interval Report/Communications Line Detail.  Then
check the Line Utilization for the interface you are using for this FTP.  If
it is above 40 this could be an iSeries issue, however I would strongly
suspect the network.  On our 620/2181 with a 100mb ethernet card and 160
users the Line Utilization averages .1 or less all day long.

This is from our FTP log for last night:

ASCL053FTP for *WED, 08/13/03 was run at 03:36:46.
125 Sending data set CL.DLY.D.SORT.IMAGE.PACKET.CL159 FIXrecfm 255
16298851 bytes transferred in 20.199 seconds. Transfer rate 806.905 KB/sec.

At this rate I calculate that a 4GB file would take about 82 minutes.  We
transfer a dozen files a night(both gets and puts, all initiated on the
iSeries) between this 620 and a mainframe with a GB ethernet card.  Last
night our transfer rates varied between 156.492 KB/sec and 1268.833 KB/sec
(smaller files usually have slower transfer rates.)

As a test I ran an FTP of a 5GB file from our iSeries to a different library
on the same system.  It ran about 200MB/min (25 minutes to complete) so I
would guess that is about the maximum possible speed for FTP on the iSeries.
(Transfer rate 3106.769 KB/sec.)

Regards,

Scott Ingvaldson
AS/400 System Administrator
GuideOne Insurance Group

-----Original Message-----
date: Tue, 12 Aug 2003 20:43:27 -0700
from: Ken.Slaugh@xxxxxxxxxx
subject: Why is the iSeries so slow


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?

This the most simplest file transfer I can think of. It's an ASCII file
created with the CPYTOSTMF file and is housed in the /home folder of the
IFS. Once switched to namefmt 1, the GET command simply retrieves the file.
No translation, authenticated user and plenty of memory, CPU and disk
space. So what am I missing or is the iSeries really not capable of
handling one of the most basic tasks any simple PC based FTP server can
achieve?

Ken Slaugh (707) 795-1512 x118
Chouinard & Myhre, Inc.
CA/400 Certified Specialist
iSeries Network/MSE Administrator
http://www.cm-inc.com/

   
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