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https://issues.apache.org/jira/browse/HADOOP-89?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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dhruba borthakur updated HADOOP-89:
-----------------------------------
Attachment: tail3.patch
Merged patch with latest trunk. Konstantin's view was that user's might get
confused if they can view data in a file that gets thrown out if the namenode
restarts. Keeping with his view, i have removed the "tail" command from this
patch.
A follow-on patch will introduce a new API "flush" that will persist blocks
before file is closed.
> files are not visible until they are closed
> -------------------------------------------
>
> Key: HADOOP-89
> URL: https://issues.apache.org/jira/browse/HADOOP-89
> Project: Hadoop
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.1.0
> Reporter: Yoram Arnon
> Assignee: dhruba borthakur
> Priority: Critical
> Attachments: tail3.patch
>
>
> the current behaviour, whereby a file is not visible until it is closed has
> several flaws,including:
> 1. no practical way to know if a file/job is progressing
> 2. no way to implement files that never close, such as log files
> 3. failure to close a file results in loss of the file
> The part of the file that's written should be visible.
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