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Remove per-tablespace size limitation for v11.1 and v11.5 community edition

Currently if we restore a database backup that was taken on a higher edition of Db2 into Developer-C, it fails with SQL1139N, even if it is fully less than 100GB. There are two workarounds for this:

  1. Set a MAX for all table spaces before taking the backup. This is problematic, because setting a MAX may not be desired in that environment, and may risk a future outage in that environment.
  2. Apply a different license, do the restore, then change the license.

DB2 should just force the max settings on restore without a user having to go in and change them.

  • Avatar32.5fb70cce7410889e661286fd7f1897de Guest
  • Jun 7 2019
  • Planned for future release
Who would benefit from this IDEA? Anyone who wants to build a sandbox or development environment based on another environment.
How should it work?

On restore, Db2 should set a max size for each table space of 100 GB. If any table space exceeds this, then the restore should fail. Alternately, a utility should be available to run against the backup to set the max size for each table space in the backup image.

I understand that IBM needs to enforce their licensing requirements, but making it harder to use the entry level edition is not the best way to do it.

Idea Priority High
Priority Justification It is strange that this does not work already. I understand that IBM needs to enforce their licensing requirements, but making it harder to use the entry level edition is not the best way to do it.
  • Attach files
  • Avatar40.8f183f721a2c86cd98fddbbe6dc46ec9
    Guest commented
    3 Jan 06:27pm

    In case anyone is confused,  the limitation of the community edition is 100 GB of storage per database.  So it's 100GB OF tablespace (the total), not PER tablespace.  db2licm -l wording can be misleading

  • Avatar40.8f183f721a2c86cd98fddbbe6dc46ec9
    Guest commented
    3 Jan 05:32pm

    Encountered this issue as well even though I was just restoring from Express edition 9.7 into Trial 11.1 and finally into the new Community edition 11.5, so higher edition is not a requirement to trigger the issue.

    I have expanded on the How should it work section a little bit:

     

    First step on restore, Db2 should check each tablespace for a maxsize of None or greater than 100GB.  It should write a warning if any are found and automatically set the tablespace maxsize to 100GB for each.

     

    Second step, Db2 should estimate the total size of the database to be restored including known compression ratios and give a warning prompt if the total actual space used risk being greater than 100GB. The user will have a chance to abort right away and fix things instead of having to wait for a lengthy restore that will just fail towards the end. 

     

    Alternately, an utility could be available to run against the backup file to do the above steps as a prerequisite check.

  • Avatar40.8f183f721a2c86cd98fddbbe6dc46ec9
    Guest commented
    10 Sep, 2019 08:55pm

    For sure

     

    I faced the same issues..  it was a pain! Simple change in the code...  Should not be that hard to implement this 


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