Re: Data queue to web app

1496 is the most common size I see. There are probably some efficiencies
to be gained using larger sizes. But with fast networks it may not be
much.

Patrick

Wayne Capwell wrote:
> 
> Thanks, I checked and the max frame size is set to 1496, well in excess
> of the 680 that seems to be our limit.  Is there and justification to
> increase the frame size?  How big should it be?
> Any help appreciated.
> Thanks
> Wayne
> 
> Patrick Townsend wrote:
> >
> > Wayne,
> >
> > I can't answer the questions about ADO, but check the Max frame size on
> > your AS/400's ethernet line description. You might need to increase it
> > to handle larger buffers of data without breaking up the TCP frame.
> >
> > Patrick
> >
> > Wayne Capwell wrote:
> > >
> > > Hello,
> > > We have modified a group of RPG programs to use data queues instead of
> > > display files to communicate with an internet connected browser. We
> > > created physical files that emulate the display file formats and send
> > > and receive the data queues in the RPG programs instead of reading and
> > > writing the display file formats.  We create the data queues on the
> > > AS/400 with a length of 2000 characters.
> > >
> > > On the web server side, we created a dll using Visual Basic 6.0 and
> > > Microsoft ADO objects to receive the data queue information and present
> > > it to our server application.  The web application parses the data queue
> > > string into the browser pages.  We also have prefined character strings
> > > that emulate the function keys, etc. that sends data back to the
> > > AS/400,  so the RPG program can complete the read data queue function
> > > and continue with its normal processing.
> > >
> > > All works well when we send less than 680 characters of data. However,
> > > when the RPG program sends more than 680, the VB dll get an "Automation
> > > Error" and ceases processing.  We have tried several iterations of the
> > > VB with the same results.  We know the data queue contains all the
> > > information on the AS/400 side.
> > >
> > > If anyone knows of this problem or even knows of a resource in IBM or
> > > Microsoft that can help, I would greatly appreciate the help.
> > > Here are our questions:
> > >
> > > 1) What version of ADO is recommended? The app currently uses Microsoft
> > > OLE DB ADO Library 1.0.  All other versions of ADO we try crashes. Are
> > > all versions of ADO supported?
> > >
> > > 2) Why can we send 2000 characters to the data queue, but only receive
> > > approx. 680 characters? This causes an "Automation Error".  Why?
> > >
> > > 3). Could they provide code samples of using ADO to communicate with
> > > AS400 data queues. We used samples from IBM's web site to develop what
> > > we are using now. Any examples in particular of moving large record sets
> > > to and from data queues. All samples from IBM's web site sends and
> > > receives
> > >  small amounts of data.
> > >
> > > TIA
> > >
> > > Wayne
> > > --
> > > ______________________________________
> > > Wayne W. Capwell
> > > Red Oak Technologies, Inc.
> > > 11301 Carmel Commons Blvd., Suite 114
> > > Charlotte, NC  28226
> > > 704-945-1067
> > >
> > > Manufacturing...Production...Solutions
> > >      http://www.redoaktech.com/
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> > IBM AS/400 communications, FTP automation, and network security
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> --
> ______________________________________
> Wayne W. Capwell
> Red Oak Technologies, Inc.
> 11301 Carmel Commons Blvd., Suite 114
> Charlotte, NC  28226
> 704-945-1067
> 
> Manufacturing...Production...Solutions
>      http://www.redoaktech.com/
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IBM AS/400 communications, FTP automation, and network security
software and consulting services.

http://www.patownsend.com
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