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  3. December 2016

Re: Records written not seen by called program

Good point Scott...

I should have made that clear.

Charles

On Tue, Dec 6, 2016 at 1:39 PM, Scott Klement <midrange-l@xxxxxxxxxxxxxxxx>
wrote:

Hmm...

Not sure that FEOD(N) is the "best" in all cases. If you are writing a
bunch of records before doing the call, then I suspect FEOD(N) is the most
efficient because it still uses the "buffer" for performance, it just
flushes it at the right time.

If you're only writing one record before calling the other program, then
I'd thinking adding BLOCK(*NO) to the DCL-F (or F-spec) would be more
efficient. There's no value to record blocking if you're going to run feod
after every record. BLOCK(*NO) turns it off.

At any rate, I agree not to use FRCRATIO(1), that will not perform as
well. Similarly using FEOD without the (N) will also perform worse.

-SK



On 12/6/2016 1:55 PM, Charles Wilt wrote:

having a unique key disables the buffering RPG does, since the DB has to
know about the record to enforce uniqueness; which has performance
implications.

FRCRATIO(1) disables the RPG buffering along with the DB "buffering"
inherit to single level store by forcing a write all the way to disk;
which
of course has even bigger performance implications.

The "best" way to solve the issue is to use FEOD(N).

Charles

On Tue, Dec 6, 2016 at 12:38 PM, Roger Harman <roger.harman@xxxxxxxxxxx>
wrote:

Thanks. I considered FEOD, but may not be able to modify the caller so
quickly.


Still hoping to confirm the dirty record issue vs unique key.


Roger Harman

COMMON Certified Application Developer - ILE RPG on IBM i on Power







________________________________
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxx> on behalf of Charles
Wilt <charles.wilt@xxxxxxxxx>
Sent: Tuesday, December 6, 2016 11:30 AM
To: Midrange Systems Technical Discussion
Subject: Re: Records written not seen by called program

FRCRATIO(1) is a bad old idea...

Add a FEOD(N) before calling PGMB. That will flush RPG's buffer....

Charles


On Tue, Dec 6, 2016 at 12:07 PM, Roger Harman <roger.harman@xxxxxxxxxxx>
wrote:

I have a process that has failed a couple of times. PgmA writes a record
and then calls PgmB with they key info. On rare occasions, the chain to
the file from PgmB fails.

The file in question is not unique keyed and I'm wondering if the record
is being buffered and not visible to the called program. I recall

reading

something about that a long time ago and that the fix is to have a
unique
key (LF?) over the physical file. Is that correct? Is FRCRATIO(1)
essentially the same thing? It's not a high volume process. Maybe

12,000

records on a busy day.

Thoughts?

Thank you.

Roger Harman
COMMON Certified Application Developer - ILE RPG on IBM i on Power




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