snleee commented on a change in pull request #6094: URL: https://github.com/apache/incubator-pinot/pull/6094#discussion_r517830276
########## File path: pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/minion/generator/SegmentMergeRollupTaskGenerator.java ########## @@ -0,0 +1,196 @@ +/** + * 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.pinot.controller.helix.core.minion.generator; + +import com.google.common.base.Preconditions; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashMap; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.stream.Collectors; +import org.apache.pinot.common.lineage.LineageEntry; +import org.apache.pinot.common.lineage.LineageEntryState; +import org.apache.pinot.common.lineage.SegmentLineage; +import org.apache.pinot.common.metadata.segment.OfflineSegmentZKMetadata; +import org.apache.pinot.common.metadata.segment.SegmentZKMetadata; +import org.apache.pinot.controller.helix.core.minion.ClusterInfoAccessor; +import org.apache.pinot.controller.helix.core.minion.mergestrategy.MergeStrategyFactory; +import org.apache.pinot.core.common.MinionConstants; +import org.apache.pinot.core.minion.PinotTaskConfig; +import org.apache.pinot.core.segment.processing.collector.CollectorFactory; +import org.apache.pinot.spi.config.table.TableConfig; +import org.apache.pinot.spi.config.table.TableTaskConfig; +import org.apache.pinot.spi.config.table.TableType; +import org.apache.pinot.spi.utils.TimeUtils; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + + +public class SegmentMergeRollupTaskGenerator implements PinotTaskGenerator { + private static final Logger LOGGER = LoggerFactory.getLogger(SegmentMergeRollupTaskGenerator.class); + + private static final int DEFAULT_MAX_NUM_SEGMENTS_PER_TASK = 20; // 20 segments + private static final int DEFAULT_MAX_NUM_RECORDS_PER_SEGMENT = 5_000_000; // 5 million rows + private static final int DEFAULT_MAX_NUM_TASKS = 200; // schedule at most 200 tasks at a time + private static final String DEFAULT_BUFFER_TIME_PERIOD = "14d"; // 2 weeks + + private final ClusterInfoAccessor _clusterInfoAccessor; + + public SegmentMergeRollupTaskGenerator(ClusterInfoAccessor clusterInfoAccessor) { + _clusterInfoAccessor = clusterInfoAccessor; + } + + @Override + public String getTaskType() { + return MinionConstants.MergeRollupTask.TASK_TYPE; + } + + @Override + public List<PinotTaskConfig> generateTasks(List<TableConfig> tableConfigs) { + List<PinotTaskConfig> pinotTaskConfigs = new ArrayList<>(); + + // Get the segments that are being converted so that we don't submit them again + Map<String, Set<String>> scheduledSegmentsMap = + TaskGeneratorUtils.getScheduledSegmentsMap(MinionConstants.MergeRollupTask.TASK_TYPE, _clusterInfoAccessor); + + // Generate tasks + int numTasks = 0; + for (TableConfig tableConfig : tableConfigs) { + // Only generate tasks for OFFLINE tables + String offlineTableName = tableConfig.getTableName(); + if (tableConfig.getTableType() != TableType.OFFLINE) { + LOGGER.warn("Skip generating MergeRollupTask for non-OFFLINE table: {}", offlineTableName); + continue; + } + + TableTaskConfig tableTaskConfig = tableConfig.getTaskConfig(); + Preconditions.checkNotNull(tableTaskConfig); + Map<String, String> taskConfigs = + tableTaskConfig.getConfigsForTaskType(MinionConstants.MergeRollupTask.TASK_TYPE); + Preconditions.checkNotNull(taskConfigs, "Task config shouldn't be null for Table: {}", offlineTableName); + + int maxNumSegmentsPerTask = + readIntConfigWithDefaultValue(taskConfigs, MinionConstants.MergeRollupTask.MAX_NUM_SEGMENTS_PER_TASK_KEY, + DEFAULT_MAX_NUM_SEGMENTS_PER_TASK); + + int maxNumRecordsPerSegment = + readIntConfigWithDefaultValue(taskConfigs, MinionConstants.MergeRollupTask.MAX_NUM_RECORDS_PER_SEGMENT_KEY, + DEFAULT_MAX_NUM_RECORDS_PER_SEGMENT); + + String bufferTimePeriod = + taskConfigs.getOrDefault(MinionConstants.MergeRollupTask.BUFFER_TIME_PERIOD_KEY, DEFAULT_BUFFER_TIME_PERIOD); + long bufferTimePeriodMs; + try { + bufferTimePeriodMs= TimeUtils.convertPeriodToMillis(bufferTimePeriod); + } catch (IllegalArgumentException e) { + LOGGER.error("Buffer time period ('{}') for table '{}' is not configured correctly.", bufferTimePeriod, + offlineTableName, e); + throw e; + } + + List<OfflineSegmentZKMetadata> segmentsForOfflineTable = + _clusterInfoAccessor.getOfflineSegmentsMetadata(offlineTableName); + + // Fetch the segment lineage for the table and compute the segments that should not be scheduled for merge + // based on the segment lineage. + SegmentLineage segmentLineageForTable = _clusterInfoAccessor.getSegmentLineage(offlineTableName); + Set<String> segmentsNotToMerge = new HashSet<>(); + if (segmentLineageForTable != null) { + for (String segmentLineageEntryId : segmentLineageForTable.getLineageEntryIds()) { + LineageEntry lineageEntry = segmentLineageForTable.getLineageEntry(segmentLineageEntryId); + // Segments shows up on "segmentFrom" field in the lineage entry should not be scheduled again. + segmentsNotToMerge.addAll(lineageEntry.getSegmentsFrom()); + + // Segments shows up on "segmentsTo" field in the lineage entry with "IN_PROGRESS" state cannot be merged. + if (lineageEntry.getState() == LineageEntryState.IN_PROGRESS) { + segmentsNotToMerge.addAll(lineageEntry.getSegmentsTo()); + } + } + } + + // Filter out the segments that cannot be merged + List<SegmentZKMetadata> segmentsToMergeForTable = new ArrayList<>(); Review comment: changed to `candidateSegments` ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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