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02261 - Opticonnect vs. TCP/IP
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Opticonnect vs. TCP/IP
I agree with Volker. I'm sure the TCC did not consider the new gigabit
ethernet, saw Doreen running TCP on a 400, and fired their old rule.
Doreen, the question is: Does the TCC have any data showing whether the
network connection between the db and app server is a bottleneck?
Here are the options for running 3-tier :
- the Opticonnect connection. For the SB1 and 7xx models this is the only
choice, and requires special equipment and the Optimover PRPQ. No new
customers should choose this option or be buying 7xx or SB1 technology.
(Note that the PRPQ is withdrawn in V5R1, so one must buy the Opticonnect
LPP.)
- Gb Ethernet connection. Available only on 8xx and 2xx models (from V4R5
on). The vast majority of customers who need 3 tier solutions will use this
solution. It does not require any Opticonnect software.
- V5R1 HSL connection. Although this is a VERY high speed connection
that seems to offer some advantages, network traffic between the DB and APP
servers is not usually a bottleneck and a dedicated Gigabit ethernet
network between the db and app servers will keep up. Once you accept
that gigabit ethernet will handle the load (and our testing so far shows
that it does), it becomes a simple economic decision. Since HSL requires
a card for every connection and only connections between two systems are
supported, an HSL connection is needed for every application server.
Gigabit cards and hubs are much cheaper than equivalent HSL HW.
In future releases, coming HSL functionality may make it more attractive
for some customers, but for now gigabit is the best alternative.
Ron Schmerbauch 507-253-4880 rschmerbZu...
iSeries 400 - ERP Development - Rochester, MN
"Gueldenpfennig, Volker" <volker.gueldenpfennigZs...> on 06/07/2001
02:52:07 PM
To: "'dandersoZb...'" <dandersoZb...>
cc: "Sap400 (E-mail)" <sap400Zm...>, "Hackmann, Ralf"
<ralf.hackmannZs...>
Subject: RE: Opticonnect vs. TCP/IP
Hello Doreen,
thanks for the information.
The recommodation of the TCC is absolutely rubbish in this area and is
outdated. This info comes from the old connection without GB-ethernet where
it was slow.
I forwarded this e-mail as well to one of our TCC-collegues that
administers
the rules for these TCC reports. There was obviously something forgotten to
update.
Sorry for your inconvinience,
Volker
-----Original Message-----
From: Anderson, Doreen [mailto:dandersoZb...]
Sent: Donnerstag, 7. Juni 2001 19:13
To: 'SAP AS/400 Discussion Group'
Subject: Opticonnect vs. TCP/IP
Just received our formal post upgrade 3.1H to 4.6C Early Watch Report & am
not happy with a particular section on Opticonnect vs. TCP/IP
Taken verbatim from the report.......
7.5 Opticonnect
"Communication between the database server and the application servers are
not established using OPTICONNECT, but using a TCP/IP connection. This
causes severe performance problems. Recommendation: To ensure optimal
throughput, use OPTICONNECT in a 3tier environment."
When we implemented all our brand new 8xx hardware, Opti-connect was not
ready to run native on the 8xx hardware with V4R5 of the Operating System,
so we chose to go with 1gb ethernet solution as the communication method
between our 2 SB3 app servers & the 840 DB server. Yes, I do understand
that with V5R1 Opti-connect will run on the 8xx hardware "natively".
Now, I've got SAP TCC Gods disputing our 1gb TCP/IP decision & "This causes
severe performance problems". Our management team entrusts that the SAP
TCC group would be the resources who would best know the optimal
performance
hardware environment. Now I'm having to explain IBM vs. SAP contradictory
recommendations.
Whiny & Aggravated
Doreen
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