RE: Sequence error in MR

[G Armour <garmour400m@xxxxxxxxx>]

Actually, I already raised the performance issue.  Based on the code that
was posted, unless the vast majority of the records in the secondary file
were to be deleted, this program wastes time unnecesarily reading records
it isn't going to delete.

As to your experience, the devil is in the details, I'm sure, Neil.

GA

--- Neil Palmer <neilp@xxxxxxxxxxx> wrote:
> There's one word missing from this discussion.  Performance. 
> Now I'm citing numbers here from 10 years ago at least, on ancient 
> hardware, but I rewrote a program someone had written to update a large 
> master file from a transaction file.  It was written using either CHAIN
> or 
> SETLL/READ (I can't recall) and I changed it to use MR logic.  The run 
> time dropped from approx 4 hours to 40 mins.  And before anyone asks, no
> I 
> don't care to recreate a similar test today, but if anyone want to go 
> ahead I'd be happy to hear the results.  :-)
> 
> ...Neil


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