Marie-line/Aaron,
WDSC and RDi are the PC packages.  They run only on the PCs.  Both of them 
connect to the Host Servers on IBM i / i5OS / OS400.  Commands are often 
executed through a program in the QDEVTOOLS library named QRSEEXEC. 
Whether you run WDSC or RDi will be irrelevant as far as connecting to the 
machine.
As far as what comes with what, you get entitlements (that's IBM-speak for 
licenses to use) the various products if you are already own them and have 
a current SWMA (Software Maintenance Agreement).  The number of 
entitlements varies with the processor tier for which your WDS was 
licensed.  e.g., a P05 get's so 10 entitlements to ILE compilers, Heritage 
(read OPM) compilers, ADTS (read SEU/PDM/RDA,etc.).  You also are entitled 
to use WDSC version 7.  There is no entitlement to RDi.
When buying a new machine (or buying new licensing for development tools), 
the tools are all sold with a minimum entitlement again depending on the 
processor tier.  But in this case, the minimum isn't saying that so many 
entitlements come with the compiler.  Instead it says if you buy the ILE 
compilers, you have to buy so many user seats to the compiler.  If you buy 
RDi, I don't think there is a minimum entitlement--emphasis on *I don't 
think*.  That's the best of my understanding.
Yesterday I did receive an e-mail from George Farr clarifying a couple of 
new announcements.  If you buy a Power Systems 520 express for IBM i, you 
get "a license of ILE, ADTS and OPM as well as RDi SOA for a price of 
$2700".  Also, there is now a trade-up from ADTS to RDi for customers with 
a current SWMA.  You can get RDi for a 40% discount off of the normal 
$795.  i.e., $477.  Although the official announcement letter states you 
need to contact your IBM representative for local charges.
At present, there is no trade up/upgrade/etc. from WDSC to RDi.
Also *FROM WHAT I UNDERSTAND* the entitlement to RDi, will not be covered 
under the standard SWMA.  To stay current with RDi, you will need a 
separate maintenance agreement.  The entitlement may come with the first 
12 months covered, but anything after that costs extra.
Michael Quigley
Computer Services
The Way International
www.TheWay.org
wdsci-l-bounces@xxxxxxxxxxxx wrote on 07/09/2008 10:30:16 AM:
----- Message from Marie-Line Manchon <mlm@xxxxxxxxxxx> on Wed, 09 
Jul 2008 15:10:32 +0200 -----
To:
Websphere Development Studio Client for iSeries <wdsci-l@xxxxxxxxxxxx>
Subject:
Re: [WDSCI-L] RDi licensing - single PC and multiple AS400's
   I thought that a few seats were coming with the compilers,
   and that you had to pay only for additional seats ?
   If I'm wrong, then I have the same question...
   As Aaron, I haven't migrated yet,
   but if one of my customers buy a new system which comes with RDI,
   will I still be able to use WDSC7 to connect to their machine ?
   Thanks !
   Marie-Line
   Aaron Bartell wrote:
 I have a customer asking me this question as I haven't upgraded to RDi
 myself... yet.
 If I buy a single license of RDi as a consultant, is there anything
 that also needs to be purchased for all of the different AS400
 machines I connect to?  For example, right now I have customers that
 DON'T use WDSC, but I can still connect to their machines just fine
 with my WDSC install on my remote PC.  I am hoping that all they
 really need to have on the remote machines is the compilers.
 Anybody?
 Aaron Bartell
 http://mowyourlawn.com
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