HDFS: Using HDFS API to append to a SequenceFile
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// fs and conf are set up for HDFS, not as a LocalFileSystem
seqWriter = SequenceFile.createWriter(fs, conf, new Path(hdfsPath), keyClass, valueClass, SequenceFile.CompressionType.NONE);
seqWriter.append(new Text(key), new BytesWritable(value));
seqWriter.close();
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