org.rocksdb

Interface MutableColumnFamilyOptionsInterface<T extends MutableColumnFamilyOptionsInterface>

All Superinterfaces:

AdvancedMutableColumnFamilyOptionsInterface<T>

All Known Implementing Classes:

ColumnFamilyOptions, MutableColumnFamilyOptions.MutableColumnFamilyOptionsBuilder, Options

public interface MutableColumnFamilyOptionsInterface<T extends MutableColumnFamilyOptionsInterface>
extends AdvancedMutableColumnFamilyOptionsInterface<T>

Method Summary

Modifier and Type	Method and Description
CompressionType	compressionType() Compress blocks using the specified compression algorithm.
boolean	disableAutoCompactions() Disable automatic compactions.
int	level0FileNumCompactionTrigger() Number of files to trigger level-0 compaction.
long	maxBytesForLevelBase() The upper-bound of the total size of level-1 files in bytes.
long	maxCompactionBytes() We try to limit number of bytes in one compaction to be lower than this threshold.
T	setCompressionType(CompressionType compressionType) Compress blocks using the specified compression algorithm.
MutableColumnFamilyOptionsInterface	setDisableAutoCompactions(boolean disableAutoCompactions) Disable automatic compactions.
MutableColumnFamilyOptionsInterface	setLevel0FileNumCompactionTrigger(int level0FileNumCompactionTrigger) Number of files to trigger level-0 compaction.
T	setMaxBytesForLevelBase(long maxBytesForLevelBase) The upper-bound of the total size of level-1 files in bytes.
MutableColumnFamilyOptionsInterface	setMaxCompactionBytes(long maxCompactionBytes) We try to limit number of bytes in one compaction to be lower than this threshold.
MutableColumnFamilyOptionsInterface	setWriteBufferSize(long writeBufferSize) Amount of data to build up in memory (backed by an unsorted log on disk) before converting to a sorted on-disk file.
long	writeBufferSize() Return size of write buffer size.

Methods inherited from interface org.rocksdb.AdvancedMutableColumnFamilyOptionsInterface

arenaBlockSize, hardPendingCompactionBytesLimit, inplaceUpdateNumLocks, level0SlowdownWritesTrigger, level0StopWritesTrigger, maxBytesForLevelMultiplier, maxBytesForLevelMultiplierAdditional, maxSequentialSkipInIterations, maxSuccessiveMerges, maxWriteBufferNumber, memtableHugePageSize, memtablePrefixBloomSizeRatio, paranoidFileChecks, reportBgIoStats, setArenaBlockSize, setHardPendingCompactionBytesLimit, setInplaceUpdateNumLocks, setLevel0SlowdownWritesTrigger, setLevel0StopWritesTrigger, setMaxBytesForLevelMultiplier, setMaxBytesForLevelMultiplierAdditional, setMaxSequentialSkipInIterations, setMaxSuccessiveMerges, setMaxWriteBufferNumber, setMemtableHugePageSize, setMemtablePrefixBloomSizeRatio, setParanoidFileChecks, setReportBgIoStats, setSoftPendingCompactionBytesLimit, setTargetFileSizeBase, setTargetFileSizeMultiplier, softPendingCompactionBytesLimit, targetFileSizeBase, targetFileSizeMultiplier

Method Detail

setWriteBufferSize

MutableColumnFamilyOptionsInterface setWriteBufferSize(long writeBufferSize)

Amount of data to build up in memory (backed by an unsorted log on disk) before converting to a sorted on-disk file. Larger values increase performance, especially during bulk loads. Up to max_write_buffer_number write buffers may be held in memory at the same time, so you may wish to adjust this parameter to control memory usage. Also, a larger write buffer will result in a longer recovery time the next time the database is opened. Default: 4MB

Parameters:

writeBufferSize - the size of write buffer.

Returns:

the instance of the current object.

Throws:

java.lang.IllegalArgumentException - thrown on 32-Bit platforms while overflowing the underlying platform specific value.

writeBufferSize

long writeBufferSize()

Return size of write buffer size.

Returns:

size of write buffer.

See Also:

setWriteBufferSize(long)

setDisableAutoCompactions

MutableColumnFamilyOptionsInterface setDisableAutoCompactions(boolean disableAutoCompactions)

Disable automatic compactions. Manual compactions can still be issued on this column family

Parameters:

disableAutoCompactions - true if auto-compactions are disabled.

Returns:

the reference to the current option.

disableAutoCompactions

boolean disableAutoCompactions()

Disable automatic compactions. Manual compactions can still be issued on this column family

Returns:

true if auto-compactions are disabled.

setLevel0FileNumCompactionTrigger

MutableColumnFamilyOptionsInterface setLevel0FileNumCompactionTrigger(int level0FileNumCompactionTrigger)

Number of files to trigger level-0 compaction. A value < 0 means that level-0 compaction will not be triggered by number of files at all. Default: 4

Parameters:

level0FileNumCompactionTrigger - The number of files to trigger level-0 compaction

Returns:

the reference to the current option.

level0FileNumCompactionTrigger

int level0FileNumCompactionTrigger()

Number of files to trigger level-0 compaction. A value < 0 means that level-0 compaction will not be triggered by number of files at all. Default: 4

Returns:

The number of files to trigger

setMaxCompactionBytes

MutableColumnFamilyOptionsInterface setMaxCompactionBytes(long maxCompactionBytes)

We try to limit number of bytes in one compaction to be lower than this threshold. But it's not guaranteed. Value 0 will be sanitized.

Parameters:

maxCompactionBytes - max bytes in a compaction

Returns:

the reference to the current option.

See Also:

maxCompactionBytes()

maxCompactionBytes

long maxCompactionBytes()

We try to limit number of bytes in one compaction to be lower than this threshold. But it's not guaranteed. Value 0 will be sanitized.

Returns:

the maximum number of bytes in for a compaction.

See Also:

setMaxCompactionBytes(long)

setMaxBytesForLevelBase

T setMaxBytesForLevelBase(long maxBytesForLevelBase)

The upper-bound of the total size of level-1 files in bytes. Maximum number of bytes for level L can be calculated as (maxBytesForLevelBase) * (maxBytesForLevelMultiplier ^ (L-1)) For example, if maxBytesForLevelBase is 20MB, and if max_bytes_for_level_multiplier is 10, total data size for level-1 will be 20MB, total file size for level-2 will be 200MB, and total file size for level-3 will be 2GB. by default 'maxBytesForLevelBase' is 10MB.

Parameters:

maxBytesForLevelBase - maximum bytes for level base.

Returns:

the reference to the current option. See AdvancedMutableColumnFamilyOptionsInterface.setMaxBytesForLevelMultiplier(double)

maxBytesForLevelBase

long maxBytesForLevelBase()

The upper-bound of the total size of level-1 files in bytes. Maximum number of bytes for level L can be calculated as (maxBytesForLevelBase) * (maxBytesForLevelMultiplier ^ (L-1)) For example, if maxBytesForLevelBase is 20MB, and if max_bytes_for_level_multiplier is 10, total data size for level-1 will be 20MB, total file size for level-2 will be 200MB, and total file size for level-3 will be 2GB. by default 'maxBytesForLevelBase' is 10MB.

Returns:

the upper-bound of the total size of level-1 files in bytes. See AdvancedMutableColumnFamilyOptionsInterface.maxBytesForLevelMultiplier()

setCompressionType

T setCompressionType(CompressionType compressionType)

Compress blocks using the specified compression algorithm. This parameter can be changed dynamically. Default: SNAPPY_COMPRESSION, which gives lightweight but fast compression.

Parameters:

compressionType - Compression Type.

Returns:

the reference to the current option.

compressionType

CompressionType compressionType()

Compress blocks using the specified compression algorithm. This parameter can be changed dynamically. Default: SNAPPY_COMPRESSION, which gives lightweight but fast compression.

Returns:

Compression type.