Separate Storage from FSImage
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Key: HDFS-1557
URL: https://issues.apache.org/jira/browse/HDFS-1557
Project: Hadoop HDFS
Issue Type: Sub-task
Components: name-node
Affects Versions: 0.21.0
Reporter: Ivan Kelly
Fix For: 0.22.0
FSImage currently derives from Storage and FSEditLog has to call methods
directly on FSImage to access the filesystem. This JIRA is to separate the
Storage class out into NNStorage so that FSEditLog is less dependent on
FSImage. From this point, the other parts of the circular dependency should be
easy to fix.
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