MetadataSyncTraversalOrder (Alluxio Core - Common Utilities 294 API)

java.lang.Object
- java.lang.Enum<MetadataSyncTraversalOrder>
- - alluxio.master.file.MetadataSyncTraversalOrder

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<MetadataSyncTraversalOrder>
```
public enum MetadataSyncTraversalOrder
extends java.lang.Enum<MetadataSyncTraversalOrder>
```
The pending Path in the Inode SyncStream traversal order. For general-scale directory, BFS can archive better sync speed. For super-large-scale directory (> 100_000_000), BFS may cause a large amount of memory to be used for ufsStatusCache. DFS can ensure a smaller ufsStatusCache size to make the memory smaller and the gc time shorter. If the size of ufsStatusCache is still large, consider setting PropertyKey.MASTER_METADATA_SYNC_PREFETCH_CHILDREN_UFS_STATUS to false.

Enum Constant Summary

Enum Constants
Enum Constant Description

BFS

DFS

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static MetadataSyncTraversalOrder`	`valueOf(java.lang.String name)`	Returns the enum constant of this type with the specified name.
`static MetadataSyncTraversalOrder[]`	`values()`	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum
clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

- Enum Constant Detail
  - BFS
```
public static final MetadataSyncTraversalOrder BFS
```
  - DFS
```
public static final MetadataSyncTraversalOrder DFS
```
- Method Detail
  - values
```
public static MetadataSyncTraversalOrder[] values()
```
    Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
    for (MetadataSyncTraversalOrder c : MetadataSyncTraversalOrder.values()) System.out.println(c);
    Returns:
    
    an array containing the constants of this enum type, in the order they are declared
  - valueOf
```
public static MetadataSyncTraversalOrder valueOf(java.lang.String name)
```
    Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
    
    Parameters:
    
    name - the name of the enum constant to be returned.
    
    Returns:
    
    the enum constant with the specified name
    
    Throws:
    
    java.lang.IllegalArgumentException - if this enum type has no constant with the specified name
    
    java.lang.NullPointerException - if the argument is null