Modify the Data Store Threshold

This topic provides information about threshold registry locations, threshold key name and default values, when does a threshold error or warning message appears, and how to modify the data store threshold.

A data store has space capacity threshold configuration that helps to monitor the free space usage information of the data store destination. In a deduplication data store, the threshold monitors the memory allocated to the hash destination and the disk space allocated for the backup destination folder, index destination, and data destination. For a non-deduplication data store, the threshold monitors the storage space only for the backup destination folder. All the five items for the thresholds monitors have two types of values:

• Error Threshold
• Warning Threshold

The threshold value is saved in the system registry. You can manually modify the default value.

Thresholds registry locations

1. Data Store Folder: [HKEY_LOCAL_MACHINE\SOFTWARE\Arcserve\Unified Data Protection\Engine\DataStore\XXXXXXX\CommStore]
2. Deduplication data destination:[HKEY_LOCAL_MACHINE\SOFTWARE\Arcserve\Unified Data Protection\Engine\DataStore\XXXXXXX\GDD\DataRole]
3. Deduplication hash destination and memory: [HKEY_LOCAL_MACHINE\SOFTWARE\Arcserve\Unified Data Protection\Engine\DataStore\XXXXXXX\GDD\HashRole]

Note: Hash role monitors the memory and disk usage both. Path represents the disk usage and Mem represents the memory.

4. Deduplication index destination: [HKEY_LOCAL_MACHINE\SOFTWARE\Arcserve\Unified Data Protection\Engine\DataStore\XXXXXXX\GDD\IndexRole]

Threshold key names and Default values

Path Type	Threshold Type	Registry Key Name	Default Value	Default Value (Before v6.5 Update 1)
Data store Folder	Warning	WarnPathThreshold	0.05	0.03
	Error	ErrorPathThreshold	2048	100
Deduplication Index Path	Warning	WarnPathThreshold	0.05	0.03
	Error	ErrorPathThreshold	2048	100
Deduplication Hash Path	Warning	WarnPathThreshold	0.05	0.03
	Error	ErrorPathThreshold	2048	100
Deduplication Data Role Path	Warning	WarnPathThreshold	0.05	0.03
	Error	ErrorPathThreshold	2048	100
Memory	Warning	WarnMemThreshold	0.05	0.03
	Error	ErrorMemThreshold	30	10

• Value less than 1 indicates free space percentage, For example 0.05 means 5%. If the free space is less than 5% of total space size, warning threshold is reached.
• Value larger than or equal to 1 indicates actual free space size and the unit is MB. For example, default 2048 means 2048MB. If the free space is less than 2048MB, error threshold is reached.

The default threshold value is designed for better performance of the data store. You can change the threshold values. We do not recommend changing these values, unless extra space is required.

Follow these steps to modify the threshold:

1. Navigate to the respective registry location.
2. Manually modify the default value of threshold.