Swaminathan Balachandran created HDDS-13960:
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Summary: Convert FlatResource Lock into DAG based lock ordering
for the snapshot lock
Key: HDDS-13960
URL: https://issues.apache.org/jira/browse/HDDS-13960
Project: Apache Ozone
Issue Type: Sub-task
Reporter: Swaminathan Balachandran
Assignee: Swaminathan Balachandran
The current leveled resource implementation is not ideal for having an
implementation since it only works on mask which can mean that only one
resource can be there at one level. However for more complex locking levels
this is not sufficient. Proposal here is to convert FlatResource into
DAGLeveledResource with which one can enforce more complex ordering to ensure
lock ordering.
This would be useful for ensuring SNAPSHOT_DB_CONTENT_LOCK is always acquired
before SNAPSHOT_DB_HANDLE_LOCK. This is to avoid any sort of deadlock later on.
The same implementation can be also extended to bootstrap lock.
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