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Status Delivered
Workspace Db2 for z/OS
Created by Guest
Created on Dec 15, 2018

Simplified compression dictionary management and its availability for CDC tables

Hello, we would need a simplified compression dictionary management.
Currently, Db2 permanently stores the compression dictionaries for compressed tablespaces in:
1. the dictionary pages in the tablespaces and image copies,
2. the Db2 log after REORG or LOAD running without the KEEPDICTIONARY option. This feature has been added in Db2 11 as Compression Dictionary availability for CDC tables. There is a new record in the SYSIBM.SYSCOPY table with ICTYPE = 'J' to locate the dictionary in the log.

We would need:
1. an easy access to multiple versions of compression dictionaries
2. allow vendor REORG and LOAD tools to provide the old compression dictionary for the replication tools.
  • Admin
    Janet Figone
    Reply
    |
    Jul 19, 2023

    Dear Emil, We are pleased to inform you this enhancement request was delivered in Db2 13 for z/OS with an enhanced REPAIR WRITELOG option to allow writing of old decompression dictionaries to the Db2 log. These can then be used by IFI306 read processing to decompress log records.

    Sincerely,

    The Db2 for z/OS Team