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HDFS, mail # user - set reduced block size for a specific file


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Re: set reduced block size for a specific file
Allen Wittenauer 2011-08-27, 22:41

On Aug 27, 2011, at 12:42 PM, Ted Dunning wrote:

> There is no way to do this for standard Apache Hadoop.

Sure there is.

You can build a custom conf dir and point it to that.  You *always* have that option for client settable options as a work around for lack of features/bugs.

1. Copy $HADOOP_CONF_DIR or $HADOOP_HOME/conf to a dir
2. modify the hdfs-site.xml to have your new block size
3. Run the following:

HADOOP_CONF_DIR=mycustomconf hadoop dfs  -put file dir

Convenient?  No.  Doable? Definitely.