Package org.apache.iotdb.db.engine.compaction.cross.utils

Class AbstractCompactionEstimator

java.lang.Object

org.apache.iotdb.db.engine.compaction.cross.utils.AbstractCompactionEstimator

Direct Known Subclasses:

AbstractCrossSpaceEstimator, AbstractInnerSpaceEstimator

public abstract class AbstractCompactionEstimator
extends java.lang.Object

Estimate the memory cost of one compaction task with specific source files based on its corresponding implementation.

Field Summary

Fields

Modifier and Type	Field	Description
protected java.util.Map<TsFileResource,org.apache.iotdb.tsfile.read.TsFileSequenceReader>	fileReaderCache

Constructor Summary

Constructors

Constructor	Description
AbstractCompactionEstimator()

Method Summary

Modifier and Type	Method	Description
void	clear()
abstract long	estimateCrossCompactionMemory(java.util.List<TsFileResource> seqResources, TsFileResource unseqResource)	Estimate the memory cost of compacting the unseq file and its corresponding overlapped seq files in cross space compaction task.
abstract long	estimateInnerCompactionMemory(java.util.List<TsFileResource> resources)	Estimate the memory cost of compacting the source files in inner space compaction task.
protected org.apache.iotdb.tsfile.read.TsFileSequenceReader	getFileReader(TsFileResource tsFileResource)	Construct a new or get an existing TsFileSequenceReader of a TsFile.

Methods inherited from class java.lang.Object

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

Field Detail

fileReaderCache

protected java.util.Map<TsFileResource,org.apache.iotdb.tsfile.read.TsFileSequenceReader> fileReaderCache

Constructor Detail

AbstractCompactionEstimator

public AbstractCompactionEstimator()

Method Detail

estimateCrossCompactionMemory

public abstract long estimateCrossCompactionMemory(java.util.List<TsFileResource> seqResources,
                                                   TsFileResource unseqResource)
                                            throws java.io.IOException

Estimate the memory cost of compacting the unseq file and its corresponding overlapped seq files in cross space compaction task.

Throws:

java.io.IOException

estimateInnerCompactionMemory

public abstract long estimateInnerCompactionMemory(java.util.List<TsFileResource> resources)

Estimate the memory cost of compacting the source files in inner space compaction task.

getFileReader

protected org.apache.iotdb.tsfile.read.TsFileSequenceReader getFileReader(TsFileResource tsFileResource)
                                                                   throws java.io.IOException

Construct a new or get an existing TsFileSequenceReader of a TsFile.

Throws:

java.io.IOException

clear

public void clear()
           throws java.io.IOException

Throws:

java.io.IOException