Re: User Space or Data Queue or PF or IFS

[Anton Gombkötö <gombkoetoe@xxxxxxxxxx>]

> I have written a utility to retrieve records from an SQL server. I
> used User Space to store the data returned from the server. The
> problem is that the user space is restricted to 16MB.

Hi John,

before i'd give up user spaces for data queues, there has to happen
more than the 16MB limit. You could easily have more than one user
space, and by means of pointers you don't care in which actual user
space your chunks reside. A single user space could hold up to 512
records of that very long size; although i'd reserve some hundred
bytes for internal management infos, just like IBM's list APIs do.

(I was using such a method for programs that processed spooled files
the hard way, where you have to use user spaces.)

I guess user spaces (& a decent logic) will be the best performing
method available for us mortals.

Don't forget that there's no reorg for a DTAQ, or at least there was
none. DLTDTAQ would be the reorg. DTAQs are also the object type most
likely to get damaged on the iseries, IMHE. (in my humble experience
:-)

-- 
Mit freundlichen Grüssen / best regards

Anton Gombkötö
Organisation und Projektleitung

Avenum Technologie GmbH
Wien - Salzburg - Stuttgart
http://www.avenum.com