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Posted to commits@atlas.apache.org by sa...@apache.org on 2018/05/24 22:03:23 UTC
atlas git commit: ATLAS-2719: Update documentation on classification
propagation to include entity delete cases
Repository: atlas
Updated Branches:
refs/heads/master 633f37b68 -> 6820cb785
ATLAS-2719: Update documentation on classification propagation to include entity delete cases
Project: http://git-wip-us.apache.org/repos/asf/atlas/repo
Commit: http://git-wip-us.apache.org/repos/asf/atlas/commit/6820cb78
Tree: http://git-wip-us.apache.org/repos/asf/atlas/tree/6820cb78
Diff: http://git-wip-us.apache.org/repos/asf/atlas/diff/6820cb78
Branch: refs/heads/master
Commit: 6820cb7859da7ae4d9583de68e5d2df2eb757442
Parents: 633f37b
Author: Sarath Subramanian <ss...@hortonworks.com>
Authored: Thu May 24 15:03:13 2018 -0700
Committer: Sarath Subramanian <ss...@hortonworks.com>
Committed: Thu May 24 15:03:13 2018 -0700
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...assification-propagation-entity-delete-1.png | Bin 0 -> 84846 bytes
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...assification-propagation-entity-delete-4.png | Bin 0 -> 137723 bytes
.../site/twiki/ClassificationPropagation.twiki | 24 ++++++++++++++++++-
5 files changed, 23 insertions(+), 1 deletion(-)
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http://git-wip-us.apache.org/repos/asf/atlas/blob/6820cb78/docs/src/site/resources/images/twiki/classification-propagation-entity-delete-1.png
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diff --git a/docs/src/site/twiki/ClassificationPropagation.twiki b/docs/src/site/twiki/ClassificationPropagation.twiki
index 75d6165..6c5d82a 100755
--- a/docs/src/site/twiki/ClassificationPropagation.twiki
+++ b/docs/src/site/twiki/ClassificationPropagation.twiki
@@ -42,13 +42,35 @@ created view as well.
<img src="images/twiki/classification-propagation-5.png"/>
---++ Delete an entity
+*Case 1:*
When an entity is deleted, classifications associated with this entity will be removed from all entities the
classifications are propagated to.
For example. when _employees_ table is deleted, classifications associated with this table are removed from
'employees_view' view.
-<img src="images/twiki/classification-propagation-6.png"/>
+<img src="images/twiki/classification-propagation-6.png" width="800" style="margin-left:20px"></img>
+
+*Case 2:*
+When an entity is deleted in the middle of a lineage path, the propagation link is broken and previously propagated
+classifications will be removed from all derived entities of the deleted entity.
+
+For example. when 'us_employees' table is deleted, classifications propagating through this table (*PII*) are removed from
+'ca_employees' table, since the only path of propagation is broken by entity deletion.
+
+<img src="images/twiki/classification-propagation-entity-delete-1.png" width="800" style="margin-left:20px"></img>
+
+<img src="images/twiki/classification-propagation-entity-delete-2.png" width="800" style="margin-left:20px"></img>
+
+*Case 3:*
+When an entity is deleted in the middle of a lineage path and if there exists alternate path for propagation, previously propagated classifications will be retained.
+
+For example. when 'us_employees' table is deleted, classifications propagating (*PII*) through this table are retained in
+'ca_employees' table, since there are two propagation paths available and only one of them is broken by entity deletion.
+
+<img src="images/twiki/classification-propagation-entity-delete-3.png" width="800" style="margin-left:20px"></img>
+
+<img src="images/twiki/classification-propagation-entity-delete-4.png" width="800" style="margin-left:20px"></img>
---++ Control Propagation
Apache Atlas provides few options to control whether/where a classification is propagated.