Use or Nor use PDSE



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Use or Nor use PDSE

Postby samb01 » Tue Mar 30, 2010 2:10 pm

Hi,

i have a librairy whiche is currently updated. So i often compress it.

I want to chnage this library to PDSE. But i dont know if there is a risk...

This library is updated by a STC really often. As soon as o job is submetted by TWS, the STC take the job (which is in SDSF) and move it to the library.

Is there any risk about the time answer...

Thanks for you help.
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Re: Use or Nor use PDSE

 

Re: Use or Nor use PDSE

Postby dick scherrer » Wed Mar 31, 2010 12:01 am

Hello,

Is there any risk about the time answer...
Please clarify. . .
Hope this helps,
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Re: Use or Nor use PDSE

Postby samb01 » Wed Mar 31, 2010 12:40 pm

Hi,


i mean about the time it take to access the PDS (response time).
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Re: Use or Nor use PDSE

Postby dick scherrer » Thu Apr 01, 2010 12:38 am

Hello,

Probably no significant performance difference.

If lots of updates/adds/deletes occur, it may help to periodically reorg the datasaet.
Hope this helps,
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Re: Use or Nor use PDSE

Postby samb01 » Thu Apr 01, 2010 1:10 pm

Ok, so i don't see why i would choose a PDSE instead of a PDS because, i compress the PDS.

If i have to reorg a PDSE, i have the same problem...
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Re: Use or Nor use PDSE

Postby expat » Thu Apr 01, 2010 3:15 pm

No, a PDSE does not need compression. However, please research the known problems of using PDSE before making any changes. Sharing a PDSE across multiple LPARs is not usually a good idea.
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Re: Use or Nor use PDSE

Postby dick scherrer » Thu Apr 01, 2010 11:36 pm

Hello,

it may help to periodically reorg the datasaet
While a compress/reorg is not necessary, there may be a bit of a performance hit if the file becomes completely fragmented. . .
Hope this helps,
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