Package org.rocksdb

Class IngestExternalFileOptions

java.lang.Object

org.rocksdb.AbstractNativeReference

org.rocksdb.AbstractImmutableNativeReference

org.rocksdb.RocksObject

org.rocksdb.IngestExternalFileOptions

All Implemented Interfaces:

java.lang.AutoCloseable

public class IngestExternalFileOptions
extends RocksObject

IngestExternalFileOptions is used by RocksDB.ingestExternalFile(ColumnFamilyHandle, List, IngestExternalFileOptions).

Field Summary

Fields inherited from class org.rocksdb.RocksObject

nativeHandle_

Fields inherited from class org.rocksdb.AbstractImmutableNativeReference

owningHandle_

Constructor Summary

Constructors

Constructor	Description
IngestExternalFileOptions()
IngestExternalFileOptions(boolean moveFiles, boolean snapshotConsistency, boolean allowGlobalSeqNo, boolean allowBlockingFlush)

Method Summary

Modifier and Type	Method	Description
boolean	allowBlockingFlush()	If set to false and the file key range overlaps with the memtable key range (memtable flush required), IngestExternalFile will fail.
boolean	allowGlobalSeqNo()	If set to false, RocksDB.ingestExternalFile(ColumnFamilyHandle, List, IngestExternalFileOptions) will fail if the file key range overlaps with existing keys or tombstones in the DB.
protected void	disposeInternal(long handle)
boolean	ingestBehind()	Returns true if duplicate keys in the file being ingested are to be skipped rather than overwriting existing data under that key.
boolean	moveFiles()	Can be set to true to move the files instead of copying them.
IngestExternalFileOptions	setAllowBlockingFlush(boolean allowBlockingFlush)	If set to false and the file key range overlaps with the memtable key range (memtable flush required), IngestExternalFile will fail.
IngestExternalFileOptions	setAllowGlobalSeqNo(boolean allowGlobalSeqNo)	If set to false, RocksDB.ingestExternalFile(ColumnFamilyHandle, List, IngestExternalFileOptions) will fail if the file key range overlaps with existing keys or tombstones in the DB.
IngestExternalFileOptions	setIngestBehind(boolean ingestBehind)	Set to true if you would like duplicate keys in the file being ingested to be skipped rather than overwriting existing data under that key.
IngestExternalFileOptions	setMoveFiles(boolean moveFiles)	Can be set to true to move the files instead of copying them.
IngestExternalFileOptions	setSnapshotConsistency(boolean snapshotConsistency)	If set to false, an ingested file keys could appear in existing snapshots that where created before the file was ingested.
IngestExternalFileOptions	setWriteGlobalSeqno(boolean writeGlobalSeqno)	Set to true if you would like to write the global_seqno to a given offset in the external SST file for backward compatibility.
boolean	snapshotConsistency()	If set to false, an ingested file keys could appear in existing snapshots that where created before the file was ingested.
boolean	writeGlobalSeqno()	Returns true write if the global_seqno is written to a given offset in the external SST file for backward compatibility.

Methods inherited from class org.rocksdb.RocksObject

disposeInternal, getNativeHandle

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

IngestExternalFileOptions

public IngestExternalFileOptions()

IngestExternalFileOptions

public IngestExternalFileOptions(boolean moveFiles,
                                 boolean snapshotConsistency,
                                 boolean allowGlobalSeqNo,
                                 boolean allowBlockingFlush)

Parameters:

moveFiles - setMoveFiles(boolean)

snapshotConsistency - setSnapshotConsistency(boolean)

allowGlobalSeqNo - setAllowGlobalSeqNo(boolean)

allowBlockingFlush - setAllowBlockingFlush(boolean)

Method Detail

moveFiles

public boolean moveFiles()

Can be set to true to move the files instead of copying them.

Returns:

true if files will be moved

setMoveFiles

public IngestExternalFileOptions setMoveFiles(boolean moveFiles)

Can be set to true to move the files instead of copying them.

Parameters:

moveFiles - true if files should be moved instead of copied

Returns:

the reference to the current IngestExternalFileOptions.

snapshotConsistency

public boolean snapshotConsistency()

If set to false, an ingested file keys could appear in existing snapshots that where created before the file was ingested.

Returns:

true if snapshot consistency is assured

setSnapshotConsistency

public IngestExternalFileOptions setSnapshotConsistency(boolean snapshotConsistency)

If set to false, an ingested file keys could appear in existing snapshots that where created before the file was ingested.

Parameters:

snapshotConsistency - true if snapshot consistency is required

Returns:

the reference to the current IngestExternalFileOptions.

allowGlobalSeqNo

public boolean allowGlobalSeqNo()

If set to false, RocksDB.ingestExternalFile(ColumnFamilyHandle, List, IngestExternalFileOptions) will fail if the file key range overlaps with existing keys or tombstones in the DB.

Returns:

true if global seq numbers are assured

setAllowGlobalSeqNo

public IngestExternalFileOptions setAllowGlobalSeqNo(boolean allowGlobalSeqNo)

If set to false, RocksDB.ingestExternalFile(ColumnFamilyHandle, List, IngestExternalFileOptions) will fail if the file key range overlaps with existing keys or tombstones in the DB.

Parameters:

allowGlobalSeqNo - true if global seq numbers are required

Returns:

the reference to the current IngestExternalFileOptions.

allowBlockingFlush

public boolean allowBlockingFlush()

If set to false and the file key range overlaps with the memtable key range (memtable flush required), IngestExternalFile will fail.

Returns:

true if blocking flushes may occur

setAllowBlockingFlush

public IngestExternalFileOptions setAllowBlockingFlush(boolean allowBlockingFlush)

If set to false and the file key range overlaps with the memtable key range (memtable flush required), IngestExternalFile will fail.

Parameters:

allowBlockingFlush - true if blocking flushes are allowed

Returns:

the reference to the current IngestExternalFileOptions.

ingestBehind

public boolean ingestBehind()

Returns true if duplicate keys in the file being ingested are to be skipped rather than overwriting existing data under that key.

Returns:

true if duplicate keys in the file being ingested are to be skipped, false otherwise.

setIngestBehind

public IngestExternalFileOptions setIngestBehind(boolean ingestBehind)

Set to true if you would like duplicate keys in the file being ingested to be skipped rather than overwriting existing data under that key. Usecase: back-fill of some historical data in the database without over-writing existing newer version of data. This option could only be used if the DB has been running with DBOptions#allowIngestBehind() == true since the dawn of time. All files will be ingested at the bottommost level with seqno=0. Default: false

Parameters:

ingestBehind - true if you would like duplicate keys in the file being ingested to be skipped.

Returns:

the reference to the current IngestExternalFileOptions.

writeGlobalSeqno

public boolean writeGlobalSeqno()

Returns true write if the global_seqno is written to a given offset in the external SST file for backward compatibility. See setWriteGlobalSeqno(boolean).

Returns:

true if the global_seqno is written to a given offset, false otherwise.

setWriteGlobalSeqno

public IngestExternalFileOptions setWriteGlobalSeqno(boolean writeGlobalSeqno)

Set to true if you would like to write the global_seqno to a given offset in the external SST file for backward compatibility. Older versions of RocksDB write the global_seqno to a given offset within the ingested SST files, and new versions of RocksDB do not. If you ingest an external SST using new version of RocksDB and would like to be able to downgrade to an older version of RocksDB, you should set writeGlobalSeqno() to true. If your service is just starting to use the new RocksDB, we recommend that you set this option to false, which brings two benefits: 1. No extra random write for global_seqno during ingestion. 2. Without writing external SST file, it's possible to do checksum. We have a plan to set this option to false by default in the future. Default: true

Parameters:

writeGlobalSeqno - true to write the gloal_seqno to a given offset, false otherwise

Returns:

the reference to the current IngestExternalFileOptions.

disposeInternal

protected final void disposeInternal(long handle)

Specified by:

disposeInternal in class RocksObject