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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3250) Extend FileSystem API to allow appending to files
Date Mon, 21 Apr 2008 23:35:21 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3250?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12591116#action_12591116
] 

dhruba borthakur commented on HADOOP-3250:
------------------------------------------

+1 on Doug's proposal.

If the path exists and is not being written to, then append() will return a OutputStream to
the file. If the path does not exist, then append will generate a IOException.

The DFSClient will issue ClientProtocol.append() call to the namenode. If the file was being
written to by another writer but it has exceeded the soft-lease period, then the namenode
would *start* a distributed lease recovery. However, it will not make the client wait for
the recovery to complete. The namenode will return an AlreadyBeingCreatedException as if the
soft-limit has not yet expired. 

> Extend FileSystem API to allow appending to files
> -------------------------------------------------
>
>                 Key: HADOOP-3250
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3250
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: fs
>            Reporter: dhruba borthakur
>
> Provide an API to allow applications to append data to pre-existing files.

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