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Status Not under consideration
Workspace z/TPF Product Family
Categories z/TPFDF
Created by Guest
Created on Jul 15, 2013

RELATED IDEAS

Allow packing of an entire file or parts of a file by ZUDFM PACK ID command.

See this idea on ideas.ibm.com

z/TPFDF provides 2 ways to PACK subfiles:

1)
ZUDFM PACK can pack a currently linked subfile only. In order to pack an entire file all contained file addresses needed to be linked via ZUDFM ACC or FAD followed by ZUDFM PACK command.

2)
CRUISE provides a PACK function. The nature and extended functionality of CRUISE consumes a considerably high amount of system resources and time.
CRUISE does chain chase a database including all chains, LLRs and embedded references to collect the prime file addresses of the subfiles in an ordered x-ref file prior to the real pack process:
- Every prime and chain block of the database is therefore accessed twice – collection and pack.
- Even if only the fixed top level indexes are to be packed, all embedded references are chain chased.
- Collecting a large number of prime file addresses in the ordered x-ref file uses up pool and is a time and i/o consuming process. The more addresses are collected, the slower the add to the x-ref gets.

If a fixed file only is to be packed it would be much more efficient to directly access and pack ordinals of a file similar to ZUDFM INIT command.

Idea priority Medium
  • Guest
    Reply
    |     Dec 13, 2016

    IBM does not expect to implement this in the foreseeable future.

  • Guest
    Reply
    |     Oct 14, 2015

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - z Systems Software
    Product - z/TPF

    For recording keeping, the previous attributes were:
    Brand - WebSphere
    Product family - Transaction Processing
    Product - z/TPF

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