| Package | Description | 
|---|---|
| org.apache.hadoop.io | Generic i/o code for use when reading and writing data to the network,
to databases, and to files. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | ArrayFileA dense file-based mapping from integers to values. | 
| class  | SetFileA file-based set of keys. | 
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