org.rocksdb.CompactionReason Maven / Gradle / Ivy
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
package org.rocksdb;
public enum CompactionReason {
kUnknown((byte)0x0),
/**
* [Level] number of L0 files > level0_file_num_compaction_trigger
*/
kLevelL0FilesNum((byte)0x1),
/**
* [Level] total size of level > MaxBytesForLevel()
*/
kLevelMaxLevelSize((byte)0x2),
/**
* [Universal] Compacting for size amplification
*/
kUniversalSizeAmplification((byte)0x3),
/**
* [Universal] Compacting for size ratio
*/
kUniversalSizeRatio((byte)0x4),
/**
* [Universal] number of sorted runs > level0_file_num_compaction_trigger
*/
kUniversalSortedRunNum((byte)0x5),
/**
* [FIFO] total size > max_table_files_size
*/
kFIFOMaxSize((byte)0x6),
/**
* [FIFO] reduce number of files.
*/
kFIFOReduceNumFiles((byte)0x7),
/**
* [FIFO] files with creation time < (current_time - interval)
*/
kFIFOTtl((byte)0x8),
/**
* Manual compaction
*/
kManualCompaction((byte)0x9),
/**
* DB::SuggestCompactRange() marked files for compaction
*/
kFilesMarkedForCompaction((byte)0x10),
/**
* [Level] Automatic compaction within bottommost level to cleanup duplicate
* versions of same user key, usually due to a released snapshot.
*/
kBottommostFiles((byte)0x0A),
/**
* Compaction based on TTL
*/
kTtl((byte)0x0B),
/**
* According to the comments in flush_job.cc, RocksDB treats flush as
* a level 0 compaction in internal stats.
*/
kFlush((byte)0x0C),
/**
* Compaction caused by external sst file ingestion
*/
kExternalSstIngestion((byte) 0x0D),
/**
* Compaction due to SST file being too old
*/
kPeriodicCompaction((byte) 0x0E),
/**
* Compaction in order to move files to temperature
*/
kChangeTemperature((byte) 0x0F);
private final byte value;
CompactionReason(final byte value) {
this.value = value;
}
/**
* Get the internal representation value.
*
* @return the internal representation value
*/
byte getValue() {
return value;
}
/**
* Get the CompactionReason from the internal representation value.
*
* @return the compaction reason.
*
* @throws IllegalArgumentException if the value is unknown.
*/
static CompactionReason fromValue(final byte value) {
for (final CompactionReason compactionReason : CompactionReason.values()) {
if(compactionReason.value == value) {
return compactionReason;
}
}
throw new IllegalArgumentException(
"Illegal value provided for CompactionReason: " + value);
}
}