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Posted to hdfs-dev@hadoop.apache.org by "Boris Shkolnik (JIRA)" <ji...@apache.org> on 2009/06/30 20:58:47 UTC

[jira] Created: (HDFS-457) better handling of volume failure in Data Node storage

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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