On Feb 8, 2008, at 3:50 PM, McKown, John wrote:
I am just now looking at this. I have a Escon CTC between my two z/OS
1.8 images. It is currently used for VTAM cross domain. I funnel my
NJE
traffic between the two images on this. Oh, these two images are on
the
same physical box. I also have IP connectivity between them via
OSAs. I
am considering activating a Hipersocket, which I have defined in the
HCD/IODF, but not in TCPIP as yet.
Is there any reason to consider using TCPIP NJE instead of the
old-fashioned VTAM NJE?
Is the answer different if I implement the hipersocket connection
between the two systems?
Just curious.
John.
You did not indicate as to the reason why you are looking at TCPIP. I
am *GUESSING* it is speed.
There were at least two items that influenced NJE speed (transfer
rate) when I was doing a lot of SNA networking with JES2.
The first was the JES2 NJE buffer size(30xx) creeps into my memory.
Make sure it matches the modetab with hdrs etc.
Also the MODETAB was also critical its been ages but parms in MODETAB
(find the old orange book on NJE and copy the modetab from it.
I found just doing those two items the thru-put was a *LOT* better.
In one case we had a 75 percent decrease in transmission time.
Ed
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