用flume提交文件到hdfs系统，并保持原来的文件名信息的配置方式：
# 配置files_source
# spooling
agent1.sources.files_source.type = spooldir
agent1.sources.files_source.spoolDir = /tmp/flumetest/
agent1.sources.files_source.fileHeader = true
agent1.sources.files_source.fileHeaderKey = fileName
# 配置hdfs_sink
agent1.sinks.hdfs_sink.type = hdfs
agent1.sinks.hdfs_sink.hdfs.path = hdfs://localhost:9000/myflumetestcluster/flume
agent1.sinks.hdfs_sink.fileType = SequenceFile
# agent1.sinks.hdfs_sink.fileType = DataStream #值DataStream表示文件类型，不会被压缩
# agent1.sinks.hdfs_sink.writeFormat = Text #针对DataStream，使用Text输出格式
agent1.sinks.hdfs_sink.hdfs.filePrefix = %{fileName} #把原来的文件名作为前缀