Re: Output record blocking

[Tony Carolla <carolla@xxxxxxxxx>]

Actually, the file is not created with the unique keyword, nor are any
of the (2) logicals built over the file.  There are fields named
uniqueID, but I am not using the unique keyword.

Thanks.  


On Mon, 8 Nov 2004 13:24:00 -0500, cwilt@xxxxxxxxxxxx
<cwilt@xxxxxxxxxxxx> wrote:
> Tony,
> 
> If the physical (or any logical over the physical?) has a unique key.  The
> blocking is turned off.  Otherwise the DB would not be able to ensure
> uniqueness.
> 
> HTH,
> 
> Charles Wilt
> iSeries Systems Administrator / Developer
> Mitsubishi Electric Automotive America
> ph: 513-573-4343
> fax: 513-398-1121
> 
> 
> 
> 
> > -----Original Message-----
> > From: Tony Carolla [mailto:carolla@xxxxxxxxx]
> > Sent: Friday, November 05, 2004 1:40 PM
> > To: RPG programming on the AS400 / iSeries
> > Subject: Output record blocking
> >
> >
> > I have written a program that is doing output to a file.  The output
> > file is declared as such:
> >
> >      FRvp1      O    E             Disk    ExtFile('DMME/RVP1')
> >      F                                     Block(*Yes)
> >      F                                     UsrOpn
> >
> > When writing to this file, if I look at the 'Display Open Files'
> > display for the job, the I/O Count and Relative Record number for this
> > file stay the same.  As I understand, this means that the program is
> > performing one write operation for each WRITE op that is executed in
> > the program (not using blocking).
> >
> > I have no overrides to the file, and I am simply usign the WRITE op.
> > The only two things that might be causing it are:
> >
> > 1)  I am writing from a DS, i.e.
> > Write Rrvp1 RvpOut;
> > The DS was defined:
> >      D RvpOut          DS                  LikeRec(Rrvp1:*Output)
> >
> > 2)  I have the same file opened for input with a different F-spec:
> >      FRvp1      O    E             Disk    ExtFile('DMME/RVP1')
> >      F                                     Block(*Yes)
> >      F                                     UsrOpn
> >
> > 3)  I have two logicals over this file opened also, with
> > blocking turned off.
> >
> > When I look in the job log, I get the message:
> > Open of member RVP1 was changed to SEQONLY(*NO).
> > I have never understood that message, or what causes it.  I have the
> > file declared with no 'K', so I don't understand why this message says
> > that I opened it in some 'seuqential' way... But it might not be
> > related.
> >
> > I like things to run fast, and without record blocking on this
> > program, I know it could go faster.  Has anybody else had this
> > problem?
> >
> >
> >
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> This is the RPG programming on the AS400 / iSeries (RPG400-L) mailing list
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> 


-- 
"Enter any 11-digit prime number to continue..."