org.rocksdb

Class CompactionOptionsFIFO

java.lang.Object

org.rocksdb.AbstractNativeReference

org.rocksdb.AbstractImmutableNativeReference

org.rocksdb.RocksObject

org.rocksdb.CompactionOptionsFIFO

All Implemented Interfaces:

java.lang.AutoCloseable

public class CompactionOptionsFIFO
extends RocksObject

Options for FIFO Compaction

Field Summary

Fields inherited from class org.rocksdb.RocksObject

nativeHandle_

Constructor Summary

Constructors

Constructor and Description
CompactionOptionsFIFO()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	allowCompaction() Check if intra-L0 compaction is enabled.
protected void	disposeInternal(long handle)
long	maxTableFilesSize() Once the total sum of table files reaches this, we will delete the oldest table file Default: 1GB
CompactionOptionsFIFO	setAllowCompaction(boolean allowCompaction) If true, try to do compaction to compact smaller files into larger ones.
CompactionOptionsFIFO	setMaxTableFilesSize(long maxTableFilesSize) Once the total sum of table files reaches this, we will delete the oldest table file Default: 1GB
CompactionOptionsFIFO	setTtl(long ttl) Drop files older than TTL.
long	ttl() The current ttl value.

Methods inherited from class org.rocksdb.RocksObject

disposeInternal

Methods inherited from class org.rocksdb.AbstractImmutableNativeReference

close, disOwnNativeHandle, isOwningHandle

Methods inherited from class org.rocksdb.AbstractNativeReference

dispose, finalize

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CompactionOptionsFIFO

public CompactionOptionsFIFO()

Method Detail

setMaxTableFilesSize

public CompactionOptionsFIFO setMaxTableFilesSize(long maxTableFilesSize)

Once the total sum of table files reaches this, we will delete the oldest table file Default: 1GB

Parameters:

maxTableFilesSize - The maximum size of the table files

Returns:

the reference to the current options.

maxTableFilesSize

public long maxTableFilesSize()

Once the total sum of table files reaches this, we will delete the oldest table file Default: 1GB

Returns:

max table file size in bytes

setTtl

public CompactionOptionsFIFO setTtl(long ttl)

Drop files older than TTL. TTL based deletion will take precedence over size based deletion if ttl > 0. delete if sst_file_creation_time < (current_time - ttl). unit: seconds. Ex: 1 day = 1 * 24 * 60 * 60 Default: 0 (disabled)

Parameters:

ttl - The ttl for the table files in seconds

Returns:

the reference to the current options.

ttl

public long ttl()

The current ttl value. Drop files older than TTL. TTL based deletion will take precedence over size based deletion if ttl > 0. delete if sst_file_creation_time < (current_time - ttl). Default: 0 (disabled)

Returns:

the ttl in seconds

setAllowCompaction

public CompactionOptionsFIFO setAllowCompaction(boolean allowCompaction)

If true, try to do compaction to compact smaller files into larger ones. Minimum files to compact follows options.level0_file_num_compaction_trigger and compaction won't trigger if average compact bytes per del file is larger than options.write_buffer_size. This is to protect large files from being compacted again. Default: false

Parameters:

allowCompaction - should allow intra-L0 compaction?

Returns:

the reference to the current options.

allowCompaction

public boolean allowCompaction()

Check if intra-L0 compaction is enabled. If true, try to do compaction to compact smaller files into larger ones. Minimum files to compact follows options.level0_file_num_compaction_trigger and compaction won't trigger if average compact bytes per del file is larger than options.write_buffer_size. This is to protect large files from being compacted again. Default: false

Returns:

a boolean value indicating whether intra-L0 compaction is enabled

disposeInternal

protected final void disposeInternal(long handle)

Specified by:

disposeInternal in class RocksObject