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From "Yongjun Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-11799) Introduce a config to allow setting up write pipeline with single node
Date Wed, 10 May 2017 17:09:04 GMT
Yongjun Zhang created HDFS-11799:
------------------------------------

             Summary: Introduce a config to allow setting up write pipeline with single node
                 Key: HDFS-11799
                 URL: https://issues.apache.org/jira/browse/HDFS-11799
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Yongjun Zhang


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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