org.apache.iotdb.db.engine.compaction

类 CompactionUtils

java.lang.Object

org.apache.iotdb.db.engine.compaction.CompactionUtils

public class CompactionUtils
extends Object

This tool can be used to perform inner space or cross space compaction of aligned and non aligned timeseries . Currently, we use InnerSpaceCompactionUtils to speed up if it is an seq inner space compaction.

构造器概要

构造器

构造器和说明
CompactionUtils()

方法概要

限定符和类型	方法和说明
static void	combineModsInCompaction(List<TsFileResource> seqResources, List<TsFileResource> unseqResources, List<TsFileResource> targetResources) Collect all the compaction modification files of source files, and combines them as the modification file of target file.
static void	compact(List<TsFileResource> seqFileResources, List<TsFileResource> unseqFileResources, List<TsFileResource> targetFileResources)
static IBatchReader	constructReader(String deviceId, List<String> measurementIds, List<IMeasurementSchema> measurementSchemas, Set<String> allSensors, QueryContext queryContext, QueryDataSource queryDataSource, boolean isAlign)
static void	deleteCompactionModsFile(List<TsFileResource> selectedSeqTsFileResourceList, List<TsFileResource> selectedUnSeqTsFileResourceList)
static void	moveTargetFile(List<TsFileResource> targetResources, boolean isInnerSpace, String fullStorageGroupName) Update the targetResource.
static void	writeWithReader(AbstractCompactionWriter writer, IBatchReader reader, int subTaskId)

从类继承的方法 java.lang.Object

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

构造器详细资料

CompactionUtils

public CompactionUtils()

方法详细资料

compact

public static void compact(List<TsFileResource> seqFileResources,
                           List<TsFileResource> unseqFileResources,
                           List<TsFileResource> targetFileResources)
                    throws IOException,
                           MetadataException,
                           StorageEngineException,
                           InterruptedException

抛出:

IOException

MetadataException

StorageEngineException

InterruptedException

writeWithReader

public static void writeWithReader(AbstractCompactionWriter writer,
                                   IBatchReader reader,
                                   int subTaskId)
                            throws IOException

抛出:

IOException

constructReader

public static IBatchReader constructReader(String deviceId,
                                           List<String> measurementIds,
                                           List<IMeasurementSchema> measurementSchemas,
                                           Set<String> allSensors,
                                           QueryContext queryContext,
                                           QueryDataSource queryDataSource,
                                           boolean isAlign)
                                    throws IllegalPathException

参数:

measurementIds - if device is aligned, then measurementIds contain all measurements. If device is not aligned, then measurementIds only contain one measurement.

抛出:

IllegalPathException

moveTargetFile

public static void moveTargetFile(List<TsFileResource> targetResources,
                                  boolean isInnerSpace,
                                  String fullStorageGroupName)
                           throws IOException,
                                  WriteProcessException

Update the targetResource. Move tmp target file to target file and serialize xxx.tsfile.resource.

抛出:

IOException

WriteProcessException

combineModsInCompaction

public static void combineModsInCompaction(List<TsFileResource> seqResources,
                                           List<TsFileResource> unseqResources,
                                           List<TsFileResource> targetResources)
                                    throws IOException

Collect all the compaction modification files of source files, and combines them as the modification file of target file.

抛出:

IOException

deleteCompactionModsFile

public static void deleteCompactionModsFile(List<TsFileResource> selectedSeqTsFileResourceList,
                                            List<TsFileResource> selectedUnSeqTsFileResourceList)
                                     throws IOException

抛出:

IOException