Provide an option to saveNamespace to save namespace uncompressed
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Key: HDFS-1614
URL: https://issues.apache.org/jira/browse/HDFS-1614
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: Hairong Kuang
With HDFS-1435, we can configure to store fsimage compressed. This jira aims to
provide an option to saveNamespace command that stores the fsimage uncompressed
regardless of the configurations. This provides a safe exit if anything goes
wrong with the compressed image when checkpointing.
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