Options for ASM disk Rebalancing

Additional Options for Rebalancing:

1. Check the Rebalance Status:
   You can monitor the progress of the rebalance process using the following query:

   
   SELECT * FROM V$ASM_OPERATION;
   

   This will show the current rebalancing status, including the percentage of completion and any other relevant details.

2. Cancel Rebalance:
   If you need to cancel a rebalance operation for any reason, you can use:

   
   ALTER DISKGROUP <diskgroup_name> CANCEL REBALANCE;
   

3. Set Rebalance Power (Speed):
   You can control the speed of the rebalance operation by adjusting the rebalance power. A higher power value results in a faster rebalance but uses more CPU resources. The default is 1 (low speed), and you can increase it up to 11 (fastest).

   Example:

   
   ALTER DISKGROUP <diskgroup_name> REBALANCE POWER 8;
   

   This would set the rebalance speed to level 8.

4. Force a Rebalance for Specific Disks:
   If you need to force the rebalance operation for specific disks in a disk group, you can use the FORCE option with the ALTER DISKGROUP command:

   
   ALTER DISKGROUP <diskgroup_name> REBALANCE FORCE;
   

Considerations:

• Rebalance Time: Depending on the amount of data and the number of disks involved, the rebalancing process can take some time. It’s best to schedule it during off-peak hours to minimize the impact on performance.
• Diskgroup Operations: The rebalance operation redistributes the data across the disks in the disk group to ensure optimal usage of available storage.