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From "Josh Elser (JIRA)" <>
Subject [jira] [Commented] (ACCUMULO-1946) Include dfs.datanode.synconclose in hdfs configuration documentation
Date Mon, 02 Dec 2013 19:26:35 GMT


Josh Elser commented on ACCUMULO-1946:

Oh, so you aren't against recommending to users that they turn this on, but more concerned
that we revisit the default for tserver.mutation.queue.max?

Sadly, afaik, this isn't something we can "turn on" for users. They have to enable it in hdfs-site.xml
themselves. We can only complain (or kill ourselves like we do for durable-sync/append) if
we don't see it enabled.

> Include dfs.datanode.synconclose in hdfs configuration documentation
> --------------------------------------------------------------------
>                 Key: ACCUMULO-1946
>                 URL:
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: docs
>            Reporter: Josh Elser
>            Assignee: Josh Elser
>             Fix For: 1.5.1, 1.6.0
> We should be including some writeup about dfs.datanode.synconclose in our documentation
surrounding the HDFS configuration as it better ensures that data is lost in the face of hard
shutdown (power loss) of the datanode process.

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