errose28 commented on a change in pull request #3018:
URL: https://github.com/apache/ozone/pull/3018#discussion_r797916692
##########
File path:
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/upgrade/OMLayoutFeature.java
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@@ -29,8 +29,9 @@
*/
public enum OMLayoutFeature implements LayoutFeature {
////////////////////////////// //////////////////////////////
- INITIAL_VERSION(0, "Initial Layout Version");
-
+ INITIAL_VERSION(0, "Initial Layout Version"),
+ // TODO: Have a better name / description? Create table action on upgrade?
+ MULTITENANCY_SCHEMA(1, "Multi-tenancy Schema");
Review comment:
The new tables will actually be created in pre-finalize, I believe when
the DB is opened. However, the old Ozone version will disregard tables it does
not know about. So as long as no information is put in these tables during
pre-finalize, it is not an incompatible change. That is why the
upgrade/downgrade acceptance tests pass on our branch.
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