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Converting ELIB datasets to PDSE datasets

  • 1.  Converting ELIB datasets to PDSE datasets

    Posted 07-06-2021 02:39 PM
    Happy Tuesday!

    We are discussing the possibility of converting our VSAM ELIB datasets to PDSE.  I wanted to hear from some of you that have been down this road and what advice you can offer.  Did you run into any issues that could save us time?  Any regrets?  Are you and the development teams you support happy with the conversion?

    Thank you in advance for any information you can share.

  • 2.  RE: Converting ELIB datasets to PDSE datasets

    Broadcom Employee
    Posted 07-07-2021 11:23 AM

    A few things that come to the top of my head is that the size of PDSEs, Member names and PDSE sharing across the LPAR. Make sure that you allocate the PDSE with  version 2. This will give you better performance.

    PDSE space: Take care when you allocate in regards to space allocation and the future.  If your ELIB is huge (over 4gb) you would have the split the file up.  KSDS(with Extended Addressability) can be over 4gb PDSEs can't be over 4gb.

    Member name: PDSE members are limited to 8 characters.

    PDSE sharing: make sure that you have PDSESHARING(EXTENDED)  in the SMS definition.

    some links:


    Hope it helps