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Posted to hdfs-dev@hadoop.apache.org by "Sergey Shelukhin (JIRA)" <ji...@apache.org> on 2015/03/03 22:25:06 UTC

[jira] [Created] (HDFS-7878) API - expose an unique file identifier

Sergey Shelukhin created HDFS-7878:
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             Summary: API - expose an unique file identifier
                 Key: HDFS-7878
                 URL: https://issues.apache.org/jira/browse/HDFS-7878
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Sergey Shelukhin


See HDFS-487.
Even though that is resolved as duplicate, the ID is actually not exposed by the JIRA it supposedly duplicates.
INode ID for the file should be easy to expose; alternatively ID could be derived from block IDs, to account for appends...

This is useful e.g. for cache key by file, to make sure cache stays correct when file is overwritten.




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