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Status Planned for future release
Workspace Db2 for z/OS
Created by Guest
Created on Mar 11, 2019

RELATED IDEAS

Drop partition in UTS PBR RPN tablespaces

Dropping partitions in a tablespaces can only be done by dropping and re-creating the entire tablespace

In earlier versions of DB2 for z/OS you could not add partition to an existing tablespace. Consequently we created about 60 tablespaces with 254 partitions each. We thought we would need them in a few years. We use only about 30 of the partitions now (13 years later). The administration and maintenance of these redundant partitions take a lot of time and effort and more datasets than actually needed has to stay allocated.

We need the ability to drop the redundant partitions by an ALTER statement. In our current case the redundant partitions are at the end of the tablespaces and no adding or rotating of partitions has been conducted, so dropping partitions at the end of the tablespace is our primary requirement. In the future we probably will need this functionality to be enhanced to any partition in the tablespace and regardless of previous rotations and additions of partitions. This may be the case if we in our Data Warehouse decide to keep less history data.

  • Guest
    Reply
    |     Aug 15, 2022

    We also have the need to be able to drop a partition from a range-partitioned tablespace. When we try to rotate partitions of an archive-enabled PBR tablespace Db2 requires us to disable archiving before the rotate then re-enable archiving after the rotate. However, when we re-enable archiving we cause a deadlock with CICS and the online transaction fails. In order to prevent the deadlock we have stopped rotating partitions and are just adding a new partition at the end of each month and emptying out the oldest one. Since we cannot drop the old partition we will end up with many empty datasets from the partitions that we should have been able to rotate out.

  • Guest
    Reply
    |     Dec 13, 2021

    To have that option (to delete limits of partitions in PBR tables) available, is very important to us.

    Presently, customer we support have 300+ PBR tables, the partition key is the MVS ID, and from time to time (1 to 2 years) customer delete LPARs, coalesce others, and divide some of them in two.

    For the new LPARs we are able to add the partition limits, but what about the deleted ones?

    We are in a situation where more partitions exists on the tables, than LPARs exists

    Until now we faced no problems with that, but in the future? Who knows...

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