| Package | Description | 
|---|---|
| org.apache.hadoop.fs | Implementations of  AbstractFileSystemfor hdfs
    over rpc and hdfs over web. | 
| org.apache.hadoop.hdfs.client | This package provides the administrative APIs for HDFS. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | FSDataInputStreamUtility that wraps a  FSInputStreamin aDataInputStreamand buffers input through aBufferedInputStream. | 
| class  | FSDataOutputStreamUtility that wraps a  OutputStreamin aDataOutputStream. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | HdfsDataInputStreamThe Hdfs implementation of  FSDataInputStream. | 
| class  | HdfsDataOutputStreamThe Hdfs implementation of  FSDataOutputStream. | 
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