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From "Harsh J (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3598) WebHDFS: support file concat
Date Fri, 25 Jan 2013 20:19:12 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3598?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13562984#comment-13562984
] 

Harsh J commented on HDFS-3598:
-------------------------------

The 'append' of HDFS needs special requirements - it will reject the operation if any of the
files but the tailing file in the sources list does not carry a length equal to a multiple
of their common block size. This is to keep the block size uniform in the target file for
all but the ultimate block. Details are on HDFS-222 (including interesting comments that the
mixed sizes case did 'work').

Likewise, if LFS gets it, it has no such restrains.
                
> WebHDFS: support file concat
> ----------------------------
>
>                 Key: HDFS-3598
>                 URL: https://issues.apache.org/jira/browse/HDFS-3598
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Plamen Jeliazkov
>
> In trunk and branch-2, DistributedFileSystem has a new concat(Path trg, Path [] psrcs)
method.  WebHDFS should support it.

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