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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-66) dfs client writes all data for a chunk to /tmp
Date Tue, 07 Mar 2006 20:05:39 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-66?page=comments#action_12369293 ] 

Doug Cutting commented on HADOOP-66:
------------------------------------

Eric: I agree.  We should probably change this use a temp directory under dfs.data.dir instead
of /tmp.

> dfs client writes all data for a chunk to /tmp
> ----------------------------------------------
>
>          Key: HADOOP-66
>          URL: http://issues.apache.org/jira/browse/HADOOP-66
>      Project: Hadoop
>         Type: Bug
>   Components: dfs
>     Versions: 0.1
>     Reporter: Sameer Paranjpye
>      Fix For: 0.1

>
> The dfs client writes all the data for the current chunk to a file in /tmp, when the
chunk is complete it is shipped out to the Datanodes. This can cause /tmp to fill up fast
when a lot of files are being written. A potentially better scheme is to buffer the written
data in RAM (application code can set the buffer size) and flush it to the Datanodes when
the buffer fills up.

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