Converting DMS tablespaces to use automatic storage

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To simplify storage management, you can convert to an existing DMS tablespace to use automatic storage by using these steps:

Identify the tablespace that you want to convert from DMS non-automatic storage to DMS automatic storage. Then, identify the storage group that you want the tablespace to use.

You can use the MON_GET_TABLESPACE () table function to find the candidate for the conversion. A sample SQL statement is as follows:

SELECT SUBSTR (TBSP_NAME, 1, 12) AS TBSP_NAME,TBSP_ID, BSP_TYPE, TBSP_CONTENT_TYPE,TBSP_USING_AUTO_STORAGE FROM TABLE (MON_GET_TABLESPACE ('', -2)) AS T WHERE TBSP_USING_AUTO_STORAGE=0;

You can use the ADMIN_GET_STORAGE_PATHS () table function to find the most suitable storage group to place the tablespace:

SELECT SUBSTR(STORAGE_GROUP_NAME,1,15)  AS STOGROUP, SUBSTR(DB_STORAGE_PATH,1,20)  AS STORAGE_PATH, SUBSTR(DB_STORAGE_PATH_STATE,1,10)  AS DB_STORAGE_PATH_STATE

FROM TABLE (ADMIN_GET_STORAGE_PATHS ('',-1)) AS T;

Once you have the data ready, you can convert the tablespace to use automatic storage by executing the statement listed here:

ALTER TABLESPACE TS_DMS_DATA MANAGED BY AUTOMATIC STORAGE USING STOGROUP SG_HOT; 

Move the content from the old container to the new automatic storage path by executing the REBALANCE statement:

    ALTER TABLESPACE TS_DMS_DATA REBALANCE;

Monitor the progress of the rebalance operation by using the statement shown here:

SELECT  VARCHAR (TBSP_NAME, 15) AS TBSP_NAME, rebalancer_mode, rebalancer_status,rebalancer_extents_remaining,rebalancer_extents_processed,rebalancer_start_time from table mon_get_rebalance_status (NULL,-2)) as t;


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