| 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 | 
| Class and Description | 
|---|
| BlockAliasMap.Reader An abstract class that is used to read  BlockAliases
 for provided blocks. | 
| BlockAliasMap.Reader.Options reader options. | 
| BlockAliasMap.Writer An abstract class used as a writer for the provided block map. | 
| BlockAliasMap.Writer.Options writer options. | 
| Class and Description | 
|---|
| BlockAliasMap An abstract class used to read and write block maps for provided blocks. | 
| BlockAliasMap.Reader An abstract class that is used to read  BlockAliases
 for provided blocks. | 
| BlockAliasMap.Reader.Options reader options. | 
| BlockAliasMap.Writer An abstract class used as a writer for the provided block map. | 
| BlockAliasMap.Writer.Options writer options. | 
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