YuweiXiao commented on code in PR #5581: URL: https://github.com/apache/hudi/pull/5581#discussion_r878654024
########## hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/index/SparkMetadataTableRecordIndex.java: ########## @@ -0,0 +1,158 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.hudi.index; + +import org.apache.hudi.client.WriteStatus; +import org.apache.hudi.common.data.HoodieData; +import org.apache.hudi.common.engine.HoodieEngineContext; +import org.apache.hudi.common.metrics.Registry; +import org.apache.hudi.common.model.HoodieKey; +import org.apache.hudi.common.model.HoodieRecord; +import org.apache.hudi.common.model.HoodieRecordGlobalLocation; +import org.apache.hudi.common.model.HoodieRecordPayload; +import org.apache.hudi.common.table.HoodieTableMetaClient; +import org.apache.hudi.common.util.HoodieTimer; +import org.apache.hudi.common.util.Option; +import org.apache.hudi.common.util.ValidationUtils; +import org.apache.hudi.config.HoodieWriteConfig; +import org.apache.hudi.data.HoodieJavaRDD; +import org.apache.hudi.exception.TableNotFoundException; +import org.apache.hudi.metadata.HoodieTableMetadataUtil; +import org.apache.hudi.metadata.MetadataPartitionType; +import org.apache.hudi.table.HoodieTable; +import org.apache.spark.api.java.JavaRDD; +import org.apache.spark.api.java.function.FlatMapFunction; +import org.apache.spark.sql.execution.PartitionIdPassthrough; + +import java.util.ArrayList; +import java.util.HashMap; +import java.util.Iterator; +import java.util.List; +import java.util.Map; +import java.util.Map.Entry; +import java.util.stream.Collectors; + +/** + * Hoodie Index implementation backed by the record index present in the Metadata Table. + */ +public class SparkMetadataTableRecordIndex<T extends HoodieRecordPayload> + extends HoodieIndex<T, JavaRDD<HoodieRecord<T>>, JavaRDD<HoodieKey>, JavaRDD<WriteStatus>> { + + public SparkMetadataTableRecordIndex(HoodieWriteConfig config) { + super(config); + } + + @Override + public HoodieData<HoodieRecord<T>> tagLocation(HoodieData<HoodieRecord<T>> records, HoodieEngineContext context, + HoodieTable hoodieTable) { + final int numFileGroups; + try { + HoodieTableMetaClient metaClient = HoodieTableMetadataUtil.getMetadataTableMetaClient(hoodieTable.getMetaClient()); + numFileGroups = HoodieTableMetadataUtil.getPartitionLatestMergedFileSlices(metaClient, + MetadataPartitionType.RECORD_INDEX.partitionPath()).size(); + } catch (TableNotFoundException e) { + // implies that metadata table has not been initialized yet (probably the first write on a new table) + return records; + } + + JavaRDD<HoodieRecord<T>> y = HoodieJavaRDD.getJavaRDD(records).keyBy(r -> HoodieTableMetadataUtil.mapRecordKeyToFileGroupIndex(r.getRecordKey(), numFileGroups)) + .partitionBy(new PartitionIdPassthrough(numFileGroups)) + .map(t -> t._2); + ValidationUtils.checkState(y.getNumPartitions() <= numFileGroups); + + registry.ifPresent(r -> r.add(TAG_LOC_NUM_PARTITIONS, records.getNumPartitions())); + return HoodieJavaRDD.of(y.mapPartitions(new LocationTagFunction(hoodieTable, registry))); + } + + @Override + public HoodieData<WriteStatus> updateLocation(HoodieData<WriteStatus> writeStatuses, HoodieEngineContext context, + HoodieTable hoodieTable) { + // This is a no-op as metadata record index updates are automatically maintained within the metadata table. + return writeStatuses; + } + + @Override + public boolean rollbackCommit(String instantTime) { + return true; + } + + @Override + public boolean isGlobal() { + return true; + } + + @Override + public boolean canIndexLogFiles() { + return false; + } + + @Override + public boolean isImplicitWithStorage() { + return false; + } + + /** + * Function that tags each HoodieRecord with an existing location, if known. + */ + class LocationTagFunction implements FlatMapFunction<Iterator<HoodieRecord<T>>, HoodieRecord<T>> { + private HoodieTable hoodieTable; + private Option<Registry> registry; + + public LocationTagFunction(HoodieTable hoodieTable, Option<Registry> registry) { + this.hoodieTable = hoodieTable; + this.registry = registry; + } + + @Override + public Iterator<HoodieRecord<T>> call(Iterator<HoodieRecord<T>> hoodieRecordIterator) { + HoodieTimer timer = new HoodieTimer().startTimer(); + + List<HoodieRecord<T>> taggedRecords = new ArrayList<>(); + Map<String, Integer> keyToIndexMap = new HashMap<>(); + while (hoodieRecordIterator.hasNext()) { + HoodieRecord rec = hoodieRecordIterator.next(); + keyToIndexMap.put(rec.getRecordKey(), taggedRecords.size()); + taggedRecords.add(rec); + } + + List<String> recordKeys = keyToIndexMap.keySet().stream().sorted().collect(Collectors.toList()); Review Comment: Hi, why do we need sort here? And It seems we can directly maintain a mapping from key to records, instead of another list index indirection. ########## hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/metadata/SparkHoodieMetadataBulkInsertPartitioner.java: ########## @@ -0,0 +1,111 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.hudi.metadata; + +import java.io.Serializable; +import java.util.ArrayList; +import java.util.Comparator; +import java.util.List; + +import org.apache.hudi.common.model.HoodieRecord; +import org.apache.hudi.common.util.ValidationUtils; +import org.apache.hudi.table.BulkInsertPartitioner; +import org.apache.spark.Partitioner; +import org.apache.spark.api.java.JavaRDD; + +import scala.Tuple2; + +/** + * A {@code BulkInsertPartitioner} implementation for Metadata Table to improve performance of initialization of metadata + * table partition when a very large number of records are inserted. + * + * This partitioner requires the records to tbe already tagged with the appropriate file slice. Review Comment: typo -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@hudi.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org