CompactionReason

java.lang.Object
- java.lang.Enum<CompactionReason>
- - org.rocksdb.CompactionReason

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<CompactionReason>
```
public enum CompactionReason
extends java.lang.Enum<CompactionReason>
```

Enum Constant Summary

Enum Constants
Enum Constant and Description
`kBottommostFiles` [Level] Automatic compaction within bottommost level to cleanup duplicate versions of same user key, usually due to a released snapshot.
`kExternalSstIngestion` Compaction caused by external sst file ingestion
`kFIFOMaxSize` [FIFO] total size > max_table_files_size
`kFIFOReduceNumFiles` [FIFO] reduce number of files.
`kFIFOTtl` [FIFO] files with creation time < (current_time - interval)
`kFilesMarkedForCompaction` DB::SuggestCompactRange() marked files for compaction
`kFlush` According to the comments in flush_job.cc, RocksDB treats flush as a level 0 compaction in internal stats.
`kLevelL0FilesNum` [Level] number of L0 files > level0_file_num_compaction_trigger
`kLevelMaxLevelSize` [Level] total size of level > MaxBytesForLevel()
`kManualCompaction` Manual compaction
`kTtl` Compaction based on TTL
`kUniversalSizeAmplification` [Universal] Compacting for size amplification
`kUniversalSizeRatio` [Universal] Compacting for size ratio
`kUniversalSortedRunNum` [Universal] number of sorted runs > level0_file_num_compaction_trigger
`kUnknown`

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static CompactionReason`	`valueOf(java.lang.String name)` Returns the enum constant of this type with the specified name.
`static CompactionReason[]`	`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
  - kUnknown
```
public static final CompactionReason kUnknown
```
  - kLevelL0FilesNum
```
public static final CompactionReason kLevelL0FilesNum
```
    [Level] number of L0 files > level0_file_num_compaction_trigger
  - kLevelMaxLevelSize
```
public static final CompactionReason kLevelMaxLevelSize
```
    [Level] total size of level > MaxBytesForLevel()
  - kUniversalSizeAmplification
```
public static final CompactionReason kUniversalSizeAmplification
```
    [Universal] Compacting for size amplification
  - kUniversalSizeRatio
```
public static final CompactionReason kUniversalSizeRatio
```
    [Universal] Compacting for size ratio
  - kUniversalSortedRunNum
```
public static final CompactionReason kUniversalSortedRunNum
```
    [Universal] number of sorted runs > level0_file_num_compaction_trigger
  - kFIFOMaxSize
```
public static final CompactionReason kFIFOMaxSize
```
    [FIFO] total size > max_table_files_size
  - kFIFOReduceNumFiles
```
public static final CompactionReason kFIFOReduceNumFiles
```
    [FIFO] reduce number of files.
  - kFIFOTtl
```
public static final CompactionReason kFIFOTtl
```
    [FIFO] files with creation time < (current_time - interval)
  - kManualCompaction
```
public static final CompactionReason kManualCompaction
```
    Manual compaction
  - kFilesMarkedForCompaction
```
public static final CompactionReason kFilesMarkedForCompaction
```
    DB::SuggestCompactRange() marked files for compaction
  - kBottommostFiles
```
public static final CompactionReason kBottommostFiles
```
    [Level] Automatic compaction within bottommost level to cleanup duplicate versions of same user key, usually due to a released snapshot.
  - kTtl
```
public static final CompactionReason kTtl
```
    Compaction based on TTL
  - kFlush
```
public static final CompactionReason kFlush
```
    According to the comments in flush_job.cc, RocksDB treats flush as a level 0 compaction in internal stats.
  - kExternalSstIngestion
```
public static final CompactionReason kExternalSstIngestion
```
    Compaction caused by external sst file ingestion
- Method Detail
  - values
```
public static CompactionReason[] 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 (CompactionReason c : CompactionReason.values())
    System.out.println(c);
```
    Returns:
    
    an array containing the constants of this enum type, in the order they are declared
  - valueOf
```
public static CompactionReason 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

Enum CompactionReason

Enum Constant Summary

Method Summary

Methods inherited from class java.lang.Enum

Methods inherited from class java.lang.Object

Enum Constant Detail

kUnknown

kLevelL0FilesNum

kLevelMaxLevelSize

kUniversalSizeAmplification

kUniversalSizeRatio

kUniversalSortedRunNum

kFIFOMaxSize

kFIFOReduceNumFiles

kFIFOTtl

kManualCompaction

kFilesMarkedForCompaction

kBottommostFiles

kTtl

kFlush

kExternalSstIngestion

Method Detail

values

valueOf