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From "Zheng Shao (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-878) FileStatus should have a field "isUnderConstruction"
Date Thu, 18 Feb 2010 19:36:28 GMT

    [ https://issues.apache.org/jira/browse/HDFS-878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12835356#action_12835356
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Zheng Shao commented on HDFS-878:
---------------------------------

Hairong, I guess you mean DFSInputStream provides the visible length and "under construction"
information?
I will open a JIRA for the "under construction" information for HDFS and HFTP.

> FileStatus should have a field "isUnderConstruction"
> ----------------------------------------------------
>
>                 Key: HDFS-878
>                 URL: https://issues.apache.org/jira/browse/HDFS-878
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: Zheng Shao
>            Assignee: Zheng Shao
>
> Currently DFSClient has no way to know whether a file is under construction or not, unless
we open the file and get locatedBlocks (which is much more costly).
> However, the namenode knows whether each INode is under construction or not.
> We should expose that information from NameNode.getListing(), to DFSClient.listPaths(),
to DistributedFileSystem.listStatus().
> We should also expose that information through DFSInputStream and DFSDataInputStream
if not there yet.

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