The tsmtutorials.com web page says you can rebalance space usage after adding a 
new DB filespace by issuing the following commands:


  *   Perform the rebalance activity during a quiet time. Logon as the server 
instance owner and execute the DB2 commands below. (on Windows, you need to run 
these commands from a DB2 Command Window and "set db2instance=server1).
    db2 connect to tsmdb1
    db2 set schema tsmdb1
    db2 alter tablespace SYSCATSPACE rebalance
    db2 alter tablespace USERSPACE1 rebalance
    db2 alter tablespace LARGESPACE1 rebalance
    db2 alter tablespace LARGEIDXSPACE1 rebalance
    db2 alter tablespace IDXSPACE1 rebalance
    db2 alter tablespace SYSTOOLSPACE rebalance

  *   Depending on the size of the tablespace, the rebalance can take some time 
to finish. For a large tablespace, the rebalance can take about 30 minutes. Run 
the following command to check the rebalance status
    db2 "select * from SYSIBMADM.TBSP_UTILIZATION " |grep -i progress

  *   If the rebalance is still active, the above command will return the 
tablespace still in active resizing. Wait until all tablespaces have done the 
rebalance and execute the following commands to reduce the tablespaces
    db2 alter tablespace SYSCATSPACE reduce max
    db2 alter tablespace USERSPACE1 reduce max
    db2 alter tablespace LARGESPACE1 reduce max
    db2 alter tablespace LARGEIDXSPACE1 reduce max
    db2 alter tablespace IDXSPACE1 reduce max
    db2 alter tablespace SYSTOOLSPACE reduce max

  *   After the rebalance/reduce, the file systems should be equally utilized 
and there are should be no more file systems in 100% full condition.
- See more at: 
http://www.tsmtutorials.com/2014/04/how-to-rebalance-tsm-server-database-tablespaces.html#sthash.pr2hDMzv.dpuf

Has anyone had this work for them?  Anything to watch out for?

David