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From "Chris Douglas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10262) Change HdfsFileStatus::fileId to an opaque identifier
Date Tue, 05 Apr 2016 21:22:25 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15227148#comment-15227148
] 

Chris Douglas commented on HDFS-10262:
--------------------------------------

For compatibility with existing 2.x clients, the signature for {{getFileId}} should not change,
and the "fileId" field should still be populated as a long in WebHDFS.

> Change HdfsFileStatus::fileId to an opaque identifier
> -----------------------------------------------------
>
>                 Key: HDFS-10262
>                 URL: https://issues.apache.org/jira/browse/HDFS-10262
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs-client, webhdfs
>            Reporter: Chris Douglas
>
> HDFS exposes the INode ID as a long via HdfsFileStatus::getFileId. Since equality is
the only valid client operation (sequential/monotonically increasing ids are not guaranteed
in any spec; leases do not rely on any other property), this identifier can be opaque instead
of assigning it a primitive type in HdfsFileStatus.



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