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misfit · Posted: Fri Jun 27, 2003 9:39 am Post subject: Difference between PDS and PDSE

What is the difference between PDS and PDSE ?
Is PDSE the 'Library' (BDAM dataset) ?

Please enlighten.

Thanks.
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ofer71 · Posted: Sat Jun 28, 2003 1:01 am Post subject:

misfit

You can find a lot of info about PDS-E here.

O.
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naveen · Beginner Joined: 03 Dec 2002 Posts: 90 Topics: 31

Check this link for a detailed explanation of differences between PDS and PDSE :

http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/DGT1D404/3.9.1.2?DT=19970513135934

bablack · Posted: Tue Jul 01, 2003 3:28 pm Post subject:

Briefly, PDS is the old format (around for 40 years or so), PDSE (E=enhanced) is the new format (less than 10 years).

PDS has fixed size directory, specified at creation time, so you had to guess up front how many members you intended to add. PDSE has a open-ended directory.

PDS never reused space with the file, so you periodically had to comprss the PDS to recover the lost space due to member updates. PDSE dynamically manages the space.

When used as a program library, PDSE offers enhancements over PDS.
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Dibakar · Posted: Tue Jul 01, 2003 11:34 pm Post subject:

Thanks bablack,

Your brief explanation explained more than related mannuals.

Dibakar.