| Package | Description | 
|---|---|
| org.apache.hadoop.hbase.io.hfile | Provides implementations of  HFileand HFileBlockCache. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | HFilePreadReaderImplementation of  HFile.Readerto deal with pread. | 
| class  | HFileStreamReaderImplementation of  HFile.Readerto deal with stream read
 do not perform any prefetch operations (HFilePreadReader will do this). | 
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