Purging history and destroyed nodes
History
History information about each node and relationship is recorded in the datastore. This audit trail includes details of the changes made, the date and time of the changes and the user who made the changes. You can view the history of each object in the datastore and you can search for and display details of destroyed objects.
Destroyed nodes
In BMC Helix Discovery when data passes a certain configurable aging threshold, it is destroyed. It is also possible to manually destroy a node before it is removed through aging. However, manual destruction of host nodes is not recommended in production appliances. For more information, see Destroying-data.
When a node is destroyed, it is marked as destroyed but remains in the datastore for a fixed period of time, after which it is automatically purged.