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Relationship Purge Profile

The performance of programmatically hard-deleting (irreversibly) existing relationship instances.

The Open Metadata Repository Services (OMRS) interface for a metadata repository defines optional methods for hard-deleting relationship instances:

Method Description
purgeRelationship completely removes a relationship instance homed in the technology under test (including all of its history)
purgeRelationshipReferenceCopy completely removes a relationship instance that is homed somewhere other than the technology under test (including all of its history)
Assertions
ID Description
repository-relationship-purge-performance-purgeRelationship See (3) in detailed logic below.
repository-relationship-purge-performance-purgeRelationshipReferenceCopy See (5) in detailed logic below.

For every relationship type supported by the technology under test, this profile does the following (in order):

  1. Searches for instancesPerType relationship GUIDs homed in the technology under test. (This uses findRelationshipsByProperty with a condition on metadataCollectionId and its performance is recorded as part of the relationship search profile.)
  2. For each of these relationship GUIDs, deleteRelationship is called to soft-delete the instance. (This is necessary before a hard-delete can be done against the instance, and is recorded as part of the relationship delete profile.)
  3. For each of these relationship GUIDs, a purgeRelationship is then called to hard-delete the instance.
  4. Searches for instancesPerType reference copy relationships. (This uses findRelationshipsByProperty with a condition on metadataCollectionId and its performance is recorded as part of the relationship search profile.)
  5. For each of these reference copy relationship instances, purgeRelationshipReferenceCopy is called to remove the reference copy instance.

Example

So, for example, if the technology under test supports 50 relationship types, and the instancesPerType parameter is set to 100, then this profile will remove 50 (types) x 100 (instances per type) x 3 (home + reference copy methods) = 15 000 relationships. (And it will run findRelationshipsByProperty 100 times.)

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