Re: lose data during system crash

["Mark S. Waterbury" <mark.s.waterbury@xxxxxxx>]

Hi, Charles:

Of course, it depends on the frequency of updating these "next numbers" 
and also, whether this is done in interactive jobs, or in batch, etc., 
and this must be weighed against the additional cost of recovery when 
they have to deal with and "clean up" these "duplicate" records, as is 
the case now, after a failure has occurred.  (Like most things to do 
with "performance", there are always "trade-offs".)

Note that I did not suggest changing FRCRATIO for ALL files, but only 
for this "next number" master file.

This is exactly why IBM added support for FRCRATIO.

Regards,

Mark S. Waterbury

> Wilt, Charles wrote:
> Note that changing FRCRATIO will impact performance negatively.
>
> It's not usually the "right" answer.
>
> Charles 
>
>   
> > -----Original Message-----
> > From: rpg400-l-bounces@xxxxxxxxxxxx 
> > [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Lim Hock-Chai
> > Sent: Monday, October 29, 2007 5:24 PM
> > To: RPG programming on the AS400 / iSeries
> > Subject: RE: lose data during system crash
> >
> > Thanks Scott, that explain the cause of problem.  I didn't 
> > know that there are two layers of memory involved.
> >  
> >
> > -----Original Message-----
> > From: rpg400-l-bounces@xxxxxxxxxxxx
> > [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Scott Klement
> > Sent: Monday, October 29, 2007 4:20 PM
> > To: RPG programming on the AS400 / iSeries
> > Subject: Re: lose data during system crash
> >
> > Blocking controls how often RPG sends the records from it's 
> > memory to the database's memory.
> >
> > FRCRATIO controls how often the database software writes it's 
> > memory to disk.
> >
> > Lim Hock-Chai wrote:
> >     
> > > Hhmmm.  Reading the help text on the command, I guess that is the 
> > > problem.  The file has FRCRATIO(*NONE).  Here is the part that I'm 
> > > confused about.  In RPG, data blocking(buffering) should 
> > >       
> > only happen 
> >     
> > > if file is opened with output only.  This RPG program is 
> > >       
> > opening this 
> >     
> > > file with UPDATE only.  Did I missing something?
> > >       
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