Best practices for autonomic healing
Autonomic healing is designed to be scheduled to run continuously in the background to check the DS-System online storage. When scheduled, it features a speed throttle that enables the module to slow down when the DS-System is experiencing a high load of activities.
There are some considerations that affect the time it takes to complete one pass through the entire online storage:
• Number of files on DS-System storage locations (more files on each storage location makes autonomic healing scanning slower).
• Number of storage locations on the DS-System: This directly determines the number of links between different storage locations. If autonomic healing has to follow more links, it will be slower.
• Number of autonomic healing processes running on one DS-System Storage location at the same time from multiple nodes.
To improve the autonomic healing scan speed you can do the following:
1. On the Setup menu, click Autonomic Healing, and then click Autonomic Healing Manager.
2. In the Autonomic Healing Manager dialog box, click Refresh. Select the backup set(s) you want to process, and then click Set Options.
• Do not select the Force DR scan option. This option forces DS-System to verify all storage locations for a file, which increases the duration of the autonomic healing scan.
3. On the Setup menu, click Advanced Configuration:
• Set the value of DeltaCheckOption to 0 to configure autonomic healing to validate only meta-data information about a file. This reduces the scan time because autonomic healing skips validation of the delta block signatures (the file content).
4. On the Setup menu, click Autonomic Healing, and then click Start Autonomic Healing. In the Processes to start box, configure how many simultaneous autonomic healing processes to run.
NOTE: Running more autonomic healing processes may not significantly increase the scan speed. It can, however, decrease the overall performance of your DS-System due to the increased I/O to the online storage.