| Class | Description | 
|---|---|
| CachingStrategy | The caching strategy we should use for an HDFS read or write operation. | 
| CachingStrategy.Builder | |
| DiskBalancerWorkStatus.DiskBalancerWorkEntry | A class that is used to report each work item that we are working on. | 
| Enum | Description | 
|---|---|
| DiskBalancerWorkStatus.Result | Various result values. | 
| Exception | Description | 
|---|---|
| CorruptMetaHeaderException | Exception object that is thrown when the block metadata file is corrupt. | 
| ReplicaNotFoundException | Exception indicating that DataNode does not have a replica
 that matches the target block. | 
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