Ethan Rose created HDDS-6885:
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Summary: Allow HDDS layout features to specify their finalization
requirements
Key: HDDS-6885
URL: https://issues.apache.org/jira/browse/HDDS-6885
Project: Apache Ozone
Issue Type: Sub-task
Components: Ozone Datanode, SCM
Reporter: Ethan Rose
Assignee: Ethan Rose
Add a field to each HDDS layout feature object that allows it to specify the
requirements SCM must enforce when it needs to be finalized. Currently there
will be two options:
1. Close all containers: The current way finalization works, which involves
closing all pipelines and containers and moving datanodes to a readonly state
until they finalize.
2. None: No special requirements. The layout feature can be finalized while
datanodes are serving reads and writes. Individual datanodes must still be
finalized before they can use new layout features.
Another requirement could be the number of datanodes that must finalize before
SCM declares finalization as complete. A minimum number may be configured by
default, but some features like erasure coding may have a specific number, like
5, needed before the feature can be declared finalized.
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