Nandakumar created HDDS-12378:
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Summary: Changing the default value of
hdds.scm.safemode.min.datanode to 3
Key: HDDS-12378
URL: https://issues.apache.org/jira/browse/HDDS-12378
Project: Apache Ozone
Issue Type: Improvement
Reporter: Nandakumar
Assignee: Nandakumar
Currently, the default value of {{hdds.scm.safemode.min.datanode}} is set to
{{{}1{}}}.
This means that an user can deploy an Ozone cluster (with default
configuration) with just one datanode and the cluster will come out of
{{{}safemode{}}}. After coming out of {{safemode}} the writes with three way
replication will fail.
By changing the default value of {{hdds.scm.safemode.min.datanode}} from {{1}}
to {{{}3{}}}, we will make sure that the cluster deployed with default
configuration will not fail during write once it's out of {{{}safemode{}}}.
The users who wants to run Ozone with just one datanode can manually update the
config.
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