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https://issues.apache.org/jira/browse/HDFS-11799?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16170210#comment-16170210
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Yongjun Zhang commented on HDFS-11799:
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Thanks for the updated patch [~brahmareddy], +1 pending the following nit and
jenkins test:
{code}
323 String MIN_REPLICATION = PREFIX + "min-replication";
324 short REPLICATION_DEFAULT = 0;
{code}
The config and default value variable names are not consistent. Suggest to
change the default value to {{MIN_REPLICATION_DEFAULT}}.
> Introduce a config to allow setting up write pipeline with fewer nodes than
> replication factor
> ----------------------------------------------------------------------------------------------
>
> Key: HDFS-11799
> URL: https://issues.apache.org/jira/browse/HDFS-11799
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Yongjun Zhang
> Assignee: Brahma Reddy Battula
> Attachments: HDFS-11799-002.patch, HDFS-11799-003.patch,
> HDFS-11799-004.patch, HDFS-11799-005.patch, HDFS-11799-006.patch,
> HDFS-11799-007.patch, HDFS-11799.patch
>
>
> During pipeline recovery, if not enough DNs can be found, if
> dfs.client.block.write.replace-datanode-on-failure.best-effort
> is enabled, we let the pipeline to continue, even if there is a single DN.
> Similarly, when we create the write pipeline initially, if for some reason we
> can't find enough DNs, we can have a similar config to enable writing with a
> single DN.
> More study will be done.
>
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