Re: a need for speed

Lim,

With that many records, you're still probably looking at a long
runtime, (I doubt it would be 3 hours, but I don't know your
environment).

If none of the suggestions given here result in the performance gains
you seek, you may have to punt and rethink - as other's have
suggested:

Modify the programs that update and add to the file so that they
maintain this summary file as the initial file changes.   Then create
the summary one last time using existing logic, and then install the
changes.

hth,

Rick

> Our telephone master file is splitted across two AS400.  One has 22M+ and the 
> other has 18M+ records.  The summary file needs to combine the record from 
> the two AS400.  To copy such a big file across to another system, index it 
> and run the process is probably too time consuming.  The plan is to create 
> summary file on each system first, then somehow combine them.  Not sure if I 
> can beat the 3 hours time of the existing process.  Is going to be fun and 
> probably will need some helps from you folks again.