RE: NBRRCDS and BLOCK(*YES)

["Chevalier, Rick" <Rick.Chevalier@xxxxxxxxxxxxxxx>]

Yes.  I have used it many times with primary files to improve performance.


 -----Original Message-----
From:   rob@dekko.com [mailto:rob@dekko.com]
Sent:   Monday, December 23, 2002 12:16 PM
To:     rpg400-l@midrange.com
Subject:        RE: NBRRCDS and BLOCK(*YES)

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Once again, will that improve the performance already inherent in a
primary file?

Rob Berendt
--
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
Benjamin Franklin




"Chevalier, Rick" <Rick.Chevalier@americredit.com>
Sent by: rpg400-l-admin@midrange.com
12/23/2002 12:37 PM
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        Subject:        RE: NBRRCDS and BLOCK(*YES)


Rob,

RPG will block for you but uses the same default blocking for all files.
If
you are sequentially reading a physical file, using the OVRDBF command
with
SEQONLY(*YES 128k/record length) will improve your performance.  You don't
get much gain when using logical files because the data isn't necessarily
in
the same sequence as the index.  This makes it hard to get sequential
records into memory at the same time.

Rick

 -----Original Message-----
From:            rob@dekko.com [mailto:rob@dekko.com]
Sent:            Monday, December 23, 2002 10:21 AM
To:              rpg400-l@midrange.com
Subject:                 Re: NBRRCDS and BLOCK(*YES)

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I've had pretty good performance letting RPG do the blocking for me, on
primary files.  Your compile listing should have a warning message that
RPG will handle the blocking factor.

Rob Berendt
--
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
Benjamin Franklin




"Uma Balasubramanian" <Uma_Balasubramanian@delhi.tcs.co.in>
Sent by: rpg400-l-admin@midrange.com
12/23/2002 06:51 AM
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        Subject:        NBRRCDS and BLOCK(*YES)


Hello Everybody,

Can anyone clarify me regarding:

My programs uses a file in update and primary mode. The file is a join
logical file. All records being read in processed and updated.
Record length is 3768

"1) Can I specify NBRRCDS or BLOCK(*yes)
2) If I specify NBRRCDS(3) in OVRDBF and specify BLOCK(*yes) in F specs
for
the same file, which will be effective ?
3) Which one is beneficial.

thank you in advance

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