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Posted to hdfs-dev@hadoop.apache.org by "Bob Hansen (JIRA)" <ji...@apache.org> on 2015/09/25 13:34:04 UTC

[jira] [Created] (HDFS-9144) Refactor libhdfs into stateful/ephemeral objects

Bob Hansen created HDFS-9144:
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             Summary: Refactor libhdfs into stateful/ephemeral objects
                 Key: HDFS-9144
                 URL: https://issues.apache.org/jira/browse/HDFS-9144
             Project: Hadoop HDFS
          Issue Type: Sub-task
    Affects Versions: HDFS-8707
            Reporter: Bob Hansen


In discussion for other efforts, we decided that we should separate several concerns:

* A posix-like FileSystem/FileHandle object (stream-based, positional reads)
* An ephemeral ReadOperation object that holds the state for reads-in-progress, which consumes
* An immutable FileInfo object which holds the block map and file size (and other metadata about the file that we assume will not change over the life of the file)



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