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Wants Info on REPLICATE/IMBED keyword of IDCAMS

 
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yogeshwar_ade

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Joined: 31 Aug 2006
Posts: 103
Location: INDIA

PostPosted: Thu Oct 04, 2007 8:35 am    Post subject: Wants Info on REPLICATE/IMBED keyword of IDCAMS
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Hi All,

I want to know whats the Use of REPLICATE/IMBED keyword in IDCAMS utility...

Also If anybody can tell me what will be affection on JCL, if I remove these keyword.
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murmohk1

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Joined: 29 Jun 2006
Posts: 1439
Location: Bangalore,India

PostPosted: Thu Oct 04, 2007 10:37 am    Post subject:
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Yogeshwar,

Quote:
I want to know whats the Use of REPLICATE/IMBED keyword in IDCAMS utility...

Please refer manaul. Its clearly mentioned in that.

Quote:
Also If anybody can tell me what will be affection on JCL, if I remove these keyword.

JCL is NOT IN LOVE (affection) with these words. You can gladly remove these.
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yogeshwar_ade

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Location: INDIA

PostPosted: Thu Oct 04, 2007 12:54 pm    Post subject: Reply to: Wants Info on REPLICATE/IMBED keyword of IDCAMS
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I want to know, If i Remove these keyword and submit the JOB , which kind of error it will give
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murmohk1

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PostPosted: Thu Oct 04, 2007 12:58 pm    Post subject:
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Yogeshwar,

Quote:
I want to know, If i Remove these keyword and submit the JOB , which kind of error it will give

As suggested, if you really had gone thru the manual, Im sure you wouldn't be asking this question.
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enrico-sorichetti

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Joined: 14 Mar 2007
Posts: 10256
Location: italy

PostPosted: Thu Oct 04, 2007 1:01 pm    Post subject: Reply to: Wants Info on REPLICATE/IMBED keyword of IDCAMS
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Quote:
I want to know, If i Remove these keyword and submit the JOB

/rudeness on :-)
why don't You try it and post the results ???
/rudeness off

Anyway

replicate and imbed are leftovers from the old times when the
DASD subsystems were slow and there were no cached control units.

"IMBED" means that the sequence set for a VSAM KSDS cluster was positioned on the first track of a cylinder
in order to avoid a seek for the real data transfer

"REPLICATE" means replicate in the index component the index block as many times it would fit on a track,
in order to avoid any rotational delay

For the current technology

"IMBED" might be irrelevant

"REPLICATE" might yield a slight performance penalization
- duplicating into the cache useless copuies of the same info

regards

e.s
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expat

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Joined: 14 Mar 2007
Posts: 8593
Location: Back in jolly old England

PostPosted: Sat Oct 06, 2007 3:06 pm    Post subject:
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As Enrico has said, these parms are for the benfit of "Classic DASD".

In later releases of z/OS these are no longer supported.
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