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The following page has been changed by ChristopheTaton: http://wiki.apache.org/hadoop/HadoopDfsReadWriteExample ------------------------------------------------------------------------------ Reading from and writing to Hadoop DFS is no different from how it is done with other file systems. The example attachment:HadoopDFSFileReadWrite.java reads a file from DFS and writes it to another file on DFS (copy command). - Hadoop [http://lucene.apache.org/hadoop/api/org/apache/hadoop/fs/FileSystem.html FileSystem] API describes the methods available to user. Let us walk through the code to understand how it is done. + Hadoop [http://hadoop.apache.org/core/api/org/apache/hadoop/fs/FileSystem.html FileSystem] API describes the methods available to user. Let us walk through the code to understand how it is done. - Create a [http://lucene.apache.org/hadoop/api/org/apache/hadoop/fs/FileSystem.html FileSystem] instance by passing a new Configuration object. + Create a [http://hadoop.apache.org/core/api/org/apache/hadoop/fs/FileSystem.html FileSystem] instance by passing a new Configuration object. {{{ Configuration conf = new Configuration(); FileSystem fs = FileSystem.get(conf); }}} - Given an input/output file name as string, we construct inFile/outFile Path objects. Most of the [http://lucene.apache.org/hadoop/api/org/apache/hadoop/fs/FileSystem.html FileSystem] APIs accepts [http://lucene.apache.org/hadoop/api/org/apache/hadoop/fs/Path.html Path] objects. + Given an input/output file name as string, we construct inFile/outFile Path objects. Most of the [http://hadoop.apache.org/core/api/org/apache/hadoop/fs/FileSystem.html FileSystem] APIs accepts [http://hadoop.apache.org/core/api/org/apache/hadoop/fs/Path.html Path] objects. {{{ Path inFile = new Path(argv[0]);
