| Package | Description | 
|---|---|
| org.apache.hadoop.hdfs.server.common.blockaliasmap | The AliasMap defines mapping of PROVIDED HDFS blocks to data in remote
 storage systems. | 
| org.apache.hadoop.hdfs.server.common.blockaliasmap.impl | 
| Modifier and Type | Method and Description | 
|---|---|
| abstract BlockAliasMap.Reader<T> | BlockAliasMap. getReader(BlockAliasMap.Reader.Options opts,
         String blockPoolID)Returns a reader to the alias map. | 
| Modifier and Type | Class and Description | 
|---|---|
| static class  | LevelDBFileRegionAliasMap.LevelDBReaderThis class is used as a reader for block maps which
 are stored as LevelDB files. | 
| static class  | TextFileRegionAliasMap.TextReaderThis class is used as a reader for block maps which
 are stored as delimited text files. | 
| Modifier and Type | Method and Description | 
|---|---|
| BlockAliasMap.Reader<FileRegion> | TextFileRegionAliasMap. getReader(BlockAliasMap.Reader.Options opts,
         String blockPoolID) | 
| BlockAliasMap.Reader<FileRegion> | LevelDBFileRegionAliasMap. getReader(BlockAliasMap.Reader.Options opts,
         String blockPoolID) | 
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