org.rocksdb

Enum 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

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