I don't know.
But here's a simple test.
Go to your AIX box, find a file that is at least 100 MB, preferably 500MB.
Send it to your OS/390 mainframe via a simple FTP, and time it.
Do it 3 or 4 times to make sure you are getting consistent timings.
FTP is about the simplest data transfer you can do via TCP/IP.
TSM won't ever go any faster than FTP.
That will take TSM issues out of the picture, and see if you can push a
simple data transfer any faster to your OS/390 machine.
(BTW, you didn't mention your release of OS/390. I think at about OS/390
R4, there were significant changes that improved the performance of OS/390
TCP/IP.)
-----Original Message-----
From: Greg Roschel [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, March 28, 2001 11:47 AM
To: [EMAIL PROTECTED]
Subject: Performance from an OS/390 Mainframe to an AIX box
I'm new to this list, so excuse my ignorance in asking this question which
may have already been kicked around. We are having performance problems
doing backups from several AIX boxes to an OS/390 mainframe. We've looked
at the network and tons of other things. To make a long question short,
we've determined that the problem is that an AIX box will only do 5 GByte
per second ESCON channel connected - - we believe this is the weak link in
the chain, so to speak, causing our "ADSM backups take too long" & "ADSM
backups not using all the available bandwidth" problems. However, we are
getting conflicting and widely varying info on this 5 GByte/second number.
Is 5 GByte/second really the max an AIX box can do ESCON channel connected
to whatever? Can anyone point me to an ADSM tuning document or whatever
which addresses issues like this?
