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Status Future consideration
Workspace Db2
Components Warehouse
Created by Guest
Created on Nov 16, 2021

Adding storage path to specific partition

Recently I faced a problem on a DPF environment. I had raised below case with IBM and seems as of now this is not possible.


In DPF environment, how can I add storage path to a specific database partititon?

The below command adds the storage path to all the partitions. where as my requirement is to add the storage only on partition number 1.

db2 "ALTER DATABASE TEST ADD STORAGE ON '/db2/data1p1', '/db2/data2p1'"

DB20000I The SQL command completed successfully.


We have a DPF Database with 3 logical nodes. Storage path was added to the partitions using database partition expression.


Catalog node (NODE 0) is created on below filesystems:

/db2/data1p0

/db2/data2p0


NODE 1 is created on :

/db2/data1p1

/db2/data2p1


And NODE 2 on:

/db2/data1p2

/db2/data2p2


Now filesystem where NODE 1 and NODE 2 are created were 95% utilized. Tablespace created on catalog node does not have large tables and hence the utilization is below 50%.


I found there is no way to add storage path to a specific node. If I add storage path, it will be allocated to all the 3 nodes including catalog node. And a tablespace rebalance after this, will mess up database design on the current environment.


Only couple of options are left with DBA. One is add another partition to the database and redistribute the data which will need lots of time and effort.

The second option is allocate more storage to the existing filesystem. There is a limitation to this as well.


It will be very helpful and will make DBAs life easier if IBM can come up with small option of allocating storage paths to specific partitions/Nodes.


Thanks,

Gorakh Ghate



Needed By Quarter