RE: ODBC vs OLE DB/400

I've never seen .NET provider perform better than straight ODBC.  That
doesn't mean you shouldn't use it though.  I'd use it if I coded in .NET.
I agree with Walden, most performance issues stem from poor or non-existing
indexing strategy on the System i side.  At least that's what I'm seeing
with the customer prospects I'm talking to.

Elvis

-----Original Message-----
Subject: RE: ODBC vs OLE DB/400

Walden,

We're doing a lot of reporting using Crystal Reports & ODBC.  Some of
the SQL statements are rather nasty.  The UI is web driven; I'm not
entirely sure of all of the technologies involved.  It's had performance
issues on occasion so I'm always on the lookout for anything that might
be of use to improve our situation.

Our non-iSeries developers are pretty good at SQL/SQL Server, and do a
lot of .NET and VB stuff.  No real Java, though.  I'm mostly wondering
if .NET would be better that ODBC from a performance standpoint.  But if
everything passes through QZDASOINIT the point may well be moot.

Thanks,

John A. Jones, CISSP
Americas Information Security Officer
Jones Lang LaSalle, Inc.
V: +1-630-455-2787 F: +1-312-601-1782
john.jones@xxxxxxxxxx

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Walden H. Leverich
Sent: Wednesday, April 05, 2006 10:13 AM
To: Midrange Systems Technical Discussion
Subject: RE: ODBC vs OLE DB/400

John,

Using them from where? Some applications want to talk to OLEDB drivers,
some to ODBC drivers. If you're speaking of programming, in what? If
it's something .NET then you don't want to use either, you want to use
the .NET native provider from IBM.

If you're using older COM based connections (VB6, Delphi, PB, etc.) then
it almost doesn't matter. Code to ADO for data access and you can switch
between the two in the connection string.

I've seen some reports in the past that showed ODBC w/a slight advantage
on first-connect and inserts and OLEDB w/an advantage on larger
recordsets, but in general it's a wash. 

-Walden

--
Walden H Leverich III
Tech Software
(516) 627-3800 x3051
WaldenL@xxxxxxxxxxxxxxx
http://www.TechSoftInc.com

Quiquid latine dictum sit altum viditur.
(Whatever is said in Latin seems profound.)

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