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https://issues.apache.org/jira/browse/HADOOP-8230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13269785#comment-13269785
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Suresh Srinivas commented on HADOOP-8230:
-----------------------------------------

bq. what is that use case?
I think I have explained it in the comments above. To repeat:

"Still, I think we should retain ability to turn it off, because I want to 
continue running my installation that way and this patch removes that ability."
                
> Enable sync by default and disable append
> -----------------------------------------
>
>                 Key: HADOOP-8230
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8230
>             Project: Hadoop Common
>          Issue Type: Improvement
>    Affects Versions: 1.0.0
>            Reporter: Eli Collins
>            Assignee: Eli Collins
>             Fix For: 1.1.0
>
>         Attachments: hadoop-8230.txt
>
>
> Per HDFS-3120 for 1.x let's:
> - Always enable the sync path, which is currently only enabled if 
> dfs.support.append is set
> - Remove the dfs.support.append configuration option. We'll keep the code 
> paths though in case we ever fix append on branch-1, in which case we can add 
> the config option back

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