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[HUDI-3281][Performance]Tuning performance of getAllPartitionPaths API in FileSystemBackedTableMetadata (#4643)

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Co-authored-by: yuezhang <yuezhang@freewheel.tv>
This commit is contained in:
YueZhang
2022-01-21 07:47:02 +08:00
committed by GitHub
parent 2071e3bfda
commit 79bf6ab00b
1 changed files with 21 additions and 26 deletions
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47
hudi-common/src/main/java/org/apache/hudi/metadata/FileSystemBackedTableMetadata.java
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@@ -31,12 +31,11 @@ import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path; import org.apache.hadoop.fs.Path;
import java.io.IOException; import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays; import java.util.Arrays;
import java.util.Collections; import java.util.Collections;
import java.util.LinkedList;
import java.util.List; import java.util.List;
import java.util.Map; import java.util.Map;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.stream.Collectors; import java.util.stream.Collectors;
public class FileSystemBackedTableMetadata implements HoodieTableMetadata { public class FileSystemBackedTableMetadata implements HoodieTableMetadata {
@@ -64,45 +63,41 @@ public class FileSystemBackedTableMetadata implements HoodieTableMetadata {
@Override @Override
public List<String> getAllPartitionPaths() throws IOException { public List<String> getAllPartitionPaths() throws IOException {
FileSystem fs = new Path(datasetBasePath).getFileSystem(hadoopConf.get());
if (assumeDatePartitioning) { if (assumeDatePartitioning) {
FileSystem fs = new Path(datasetBasePath).getFileSystem(hadoopConf.get());
return FSUtils.getAllPartitionFoldersThreeLevelsDown(fs, datasetBasePath); return FSUtils.getAllPartitionFoldersThreeLevelsDown(fs, datasetBasePath);
} }
List<Path> pathsToList = new LinkedList<>(); List<Path> pathsToList = new CopyOnWriteArrayList<>();
pathsToList.add(new Path(datasetBasePath)); pathsToList.add(new Path(datasetBasePath));
List<String> partitionPaths = new ArrayList<>(); List<String> partitionPaths = new CopyOnWriteArrayList<>();
while (!pathsToList.isEmpty()) { while (!pathsToList.isEmpty()) {
// TODO: Get the parallelism from HoodieWriteConfig // TODO: Get the parallelism from HoodieWriteConfig
int listingParallelism = Math.min(DEFAULT_LISTING_PARALLELISM, pathsToList.size()); int listingParallelism = Math.min(DEFAULT_LISTING_PARALLELISM, pathsToList.size());
// List all directories in parallel // List all directories in parallel
List<Pair<Path, FileStatus[]>> dirToFileListing = engineContext.map(pathsToList, path -> { List<FileStatus[]> dirToFileListing = engineContext.map(pathsToList, path -> {
FileSystem fileSystem = path.getFileSystem(hadoopConf.get()); FileSystem fileSystem = path.getFileSystem(hadoopConf.get());
return Pair.of(path, fileSystem.listStatus(path)); return fileSystem.listStatus(path);
}, listingParallelism); }, listingParallelism);
pathsToList.clear(); pathsToList.clear();
// If the listing reveals a directory, add it to queue. If the listing reveals a hoodie partition, add it to // if current dictionary contains PartitionMetadata, add it to result
// the results. // if current dictionary does not contain PartitionMetadata, add it to queue
dirToFileListing.forEach(p -> { dirToFileListing.stream().flatMap(Arrays::stream).parallel()
Option<FileStatus> partitionMetaFile = Option.fromJavaOptional(Arrays.stream(p.getRight()).parallel() .forEach(fileStatus -> {
.filter(fs -> fs.getPath().getName().equals(HoodiePartitionMetadata.HOODIE_PARTITION_METAFILE)) if (fileStatus.isDirectory()) {
.findFirst()); if (HoodiePartitionMetadata.hasPartitionMetadata(fs, fileStatus.getPath())) {
partitionPaths.add(FSUtils.getRelativePartitionPath(new Path(datasetBasePath), fileStatus.getPath()));
if (partitionMetaFile.isPresent()) { } else if (!fileStatus.getPath().getName().equals(HoodieTableMetaClient.METAFOLDER_NAME)) {
// Is a partition. pathsToList.add(fileStatus.getPath());
String partitionName = FSUtils.getRelativePartitionPath(new Path(datasetBasePath), p.getLeft()); }
partitionPaths.add(partitionName); } else if (fileStatus.getPath().getName().equals(HoodiePartitionMetadata.HOODIE_PARTITION_METAFILE)) {
} else { String partitionName = FSUtils.getRelativePartitionPath(new Path(datasetBasePath), fileStatus.getPath().getParent());
// Add sub-dirs to the queue partitionPaths.add(partitionName);
pathsToList.addAll(Arrays.stream(p.getRight()) }
.filter(fs -> fs.isDirectory() && !fs.getPath().getName().equals(HoodieTableMetaClient.METAFOLDER_NAME)) });
.map(fs -> fs.getPath())
.collect(Collectors.toList()));
}
});
} }
return partitionPaths; return partitionPaths;
} }