better handling of volume failure in Data Node storage
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Key: HDFS-457
URL: https://issues.apache.org/jira/browse/HDFS-457
Project: Hadoop HDFS
Issue Type: Bug
Components: data-node
Reporter: Boris Shkolnik
Current implementation shuts DataNode down completely when one of the
configured volumes of the storage fails.
This is rather wasteful behavior because it decreases utilization (good
storage becomes unavailable) and imposes extra load on the system (replication
of the blocks from the good volumes). These problems will become even more
prominent when we move to mixed (heterogeneous) clusters with many more volumes
per Data Node.
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