DuplicatingFileSystem (Flink : Core 1.20.1-cp1 API)

```
public interface DuplicatingFileSystem
```
An extension interface for FileSystems that can perform cheap DFS side duplicate operation. Such an operation can improve the time required for creating cheaply independent snapshots from incremental snapshots.

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static interface DuplicatingFileSystem.CopyRequest
A pair of source and destination to duplicate a file.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`canFastDuplicate(Path source, Path destination)`	Tells if we can perform duplicate/copy between given paths.
`void`	`duplicate(List<DuplicatingFileSystem.CopyRequest> requests)`	Duplicates the source path into the destination path.

- Method Detail
  - canFastDuplicate
```
boolean canFastDuplicate(Path source,
                         Path destination)
                  throws IOException
```
    Tells if we can perform duplicate/copy between given paths.
    This should be a rather cheap operation, preferably not involving any remote accesses. You can check e.g. if both paths are on the same host.
    
    Parameters:
    
    source - The path of the source file to duplicate
    
    destination - The path where to duplicate the source file
    
    Returns:
    
    true, if we can perform the duplication
    
    Throws:
    
    IOException
  - duplicate
```
void duplicate(List<DuplicatingFileSystem.CopyRequest> requests)
        throws IOException
```
    Duplicates the source path into the destination path.
    You should first check if you can duplicate with canFastDuplicate(Path, Path).
    
    Parameters:
    
    requests - Pairs of src/dst to copy.
    
    Throws:
    
    IOException