walterddr commented on a change in pull request #7838: URL: https://github.com/apache/pinot/pull/7838#discussion_r764509124
########## File path: pinot-core/src/main/java/org/apache/pinot/core/query/reduce/BaseReduceService.java ########## @@ -0,0 +1,308 @@ +/** + * 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.core.query.reduce; + +import com.google.common.util.concurrent.ThreadFactoryBuilder; +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Executors; +import java.util.concurrent.ThreadFactory; +import java.util.concurrent.TimeUnit; +import javax.annotation.concurrent.ThreadSafe; +import org.apache.pinot.common.metrics.BrokerMeter; +import org.apache.pinot.common.metrics.BrokerMetrics; +import org.apache.pinot.common.metrics.BrokerTimer; +import org.apache.pinot.common.request.context.ExpressionContext; +import org.apache.pinot.common.response.broker.BrokerResponseNative; +import org.apache.pinot.common.response.broker.QueryProcessingException; +import org.apache.pinot.common.response.broker.ResultTable; +import org.apache.pinot.common.utils.DataTable; +import org.apache.pinot.common.utils.DataTable.MetadataKey; +import org.apache.pinot.core.query.request.context.QueryContext; +import org.apache.pinot.core.transport.ServerRoutingInstance; +import org.apache.pinot.spi.config.table.TableType; +import org.apache.pinot.spi.env.PinotConfiguration; +import org.apache.pinot.spi.utils.CommonConstants; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + + +/** + * This is the base reduce service. + */ +@ThreadSafe +public abstract class BaseReduceService { + + // Set the reducer priority higher than NORM but lower than MAX, because if a query is complete + // we want to deserialize and return response as soon. This is the same as server side 'pqr' threads. + protected static final int QUERY_RUNNER_THREAD_PRIORITY = 7; + // brw -> Shorthand for broker reduce worker threads. + protected static final String REDUCE_THREAD_NAME_FORMAT = "brw-%d"; + + private static final Logger LOGGER = LoggerFactory.getLogger(BaseReduceService.class); + + protected final ExecutorService _reduceExecutorService; + protected final int _maxReduceThreadsPerQuery; + protected final int _groupByTrimThreshold; + + public BaseReduceService(PinotConfiguration config) { + _maxReduceThreadsPerQuery = config.getProperty(CommonConstants.Broker.CONFIG_OF_MAX_REDUCE_THREADS_PER_QUERY, + CommonConstants.Broker.DEFAULT_MAX_REDUCE_THREADS_PER_QUERY); + _groupByTrimThreshold = config.getProperty(CommonConstants.Broker.CONFIG_OF_BROKER_GROUPBY_TRIM_THRESHOLD, + CommonConstants.Broker.DEFAULT_BROKER_GROUPBY_TRIM_THRESHOLD); + + int numThreadsInExecutorService = Runtime.getRuntime().availableProcessors(); + LOGGER.info("Initializing BrokerReduceService with {} threads, and {} max reduce threads.", + numThreadsInExecutorService, _maxReduceThreadsPerQuery); + + ThreadFactory reduceThreadFactory = + new ThreadFactoryBuilder().setDaemon(false).setPriority(QUERY_RUNNER_THREAD_PRIORITY) + .setNameFormat(REDUCE_THREAD_NAME_FORMAT).build(); + + // ExecutorService is initialized with numThreads same as availableProcessors. + _reduceExecutorService = Executors.newFixedThreadPool(numThreadsInExecutorService, reduceThreadFactory); + } + + protected static void updateAlias(QueryContext queryContext, BrokerResponseNative brokerResponseNative) { + ResultTable resultTable = brokerResponseNative.getResultTable(); + if (resultTable == null) { + return; + } + List<String> aliasList = queryContext.getAliasList(); + if (aliasList.isEmpty()) { + return; + } + + String[] columnNames = resultTable.getDataSchema().getColumnNames(); + List<ExpressionContext> selectExpressions = getSelectExpressions(queryContext.getSelectExpressions()); + int numSelectExpressions = selectExpressions.size(); + // For query like `SELECT *`, we skip alias update. + if (columnNames.length != numSelectExpressions) { + return; + } + for (int i = 0; i < numSelectExpressions; i++) { + String alias = aliasList.get(i); + if (alias != null) { + columnNames[i] = alias; + } + } + } + + protected static List<ExpressionContext> getSelectExpressions(List<ExpressionContext> selectExpressions) { + // NOTE: For DISTINCT queries, need to extract the arguments as the SELECT expressions + if (selectExpressions.size() == 1 && selectExpressions.get(0).getType() == ExpressionContext.Type.FUNCTION + && selectExpressions.get(0).getFunction().getFunctionName().equals("distinct")) { + return selectExpressions.get(0).getFunction().getArguments(); + } + return selectExpressions; + } + + protected static void updateBrokerMetrics(BrokerResponseNative brokerResponseNative, Map<String, String> metadata) { + + } + + protected void shutDown() { + _reduceExecutorService.shutdownNow(); + } + + protected static class BrokerMetricsAggregator { + List<QueryProcessingException> _processingExceptions = new ArrayList<>(); Review comment: not for the primitive types. if there's needs in the future we can improve later. ########## File path: pinot-core/src/main/java/org/apache/pinot/core/query/reduce/BaseReduceService.java ########## @@ -0,0 +1,308 @@ +/** + * 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.core.query.reduce; + +import com.google.common.util.concurrent.ThreadFactoryBuilder; +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Executors; +import java.util.concurrent.ThreadFactory; +import java.util.concurrent.TimeUnit; +import javax.annotation.concurrent.ThreadSafe; +import org.apache.pinot.common.metrics.BrokerMeter; +import org.apache.pinot.common.metrics.BrokerMetrics; +import org.apache.pinot.common.metrics.BrokerTimer; +import org.apache.pinot.common.request.context.ExpressionContext; +import org.apache.pinot.common.response.broker.BrokerResponseNative; +import org.apache.pinot.common.response.broker.QueryProcessingException; +import org.apache.pinot.common.response.broker.ResultTable; +import org.apache.pinot.common.utils.DataTable; +import org.apache.pinot.common.utils.DataTable.MetadataKey; +import org.apache.pinot.core.query.request.context.QueryContext; +import org.apache.pinot.core.transport.ServerRoutingInstance; +import org.apache.pinot.spi.config.table.TableType; +import org.apache.pinot.spi.env.PinotConfiguration; +import org.apache.pinot.spi.utils.CommonConstants; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + + +/** + * This is the base reduce service. + */ +@ThreadSafe +public abstract class BaseReduceService { + + // Set the reducer priority higher than NORM but lower than MAX, because if a query is complete + // we want to deserialize and return response as soon. This is the same as server side 'pqr' threads. + protected static final int QUERY_RUNNER_THREAD_PRIORITY = 7; + // brw -> Shorthand for broker reduce worker threads. + protected static final String REDUCE_THREAD_NAME_FORMAT = "brw-%d"; + + private static final Logger LOGGER = LoggerFactory.getLogger(BaseReduceService.class); + + protected final ExecutorService _reduceExecutorService; + protected final int _maxReduceThreadsPerQuery; + protected final int _groupByTrimThreshold; + + public BaseReduceService(PinotConfiguration config) { + _maxReduceThreadsPerQuery = config.getProperty(CommonConstants.Broker.CONFIG_OF_MAX_REDUCE_THREADS_PER_QUERY, + CommonConstants.Broker.DEFAULT_MAX_REDUCE_THREADS_PER_QUERY); + _groupByTrimThreshold = config.getProperty(CommonConstants.Broker.CONFIG_OF_BROKER_GROUPBY_TRIM_THRESHOLD, + CommonConstants.Broker.DEFAULT_BROKER_GROUPBY_TRIM_THRESHOLD); + + int numThreadsInExecutorService = Runtime.getRuntime().availableProcessors(); + LOGGER.info("Initializing BrokerReduceService with {} threads, and {} max reduce threads.", + numThreadsInExecutorService, _maxReduceThreadsPerQuery); + + ThreadFactory reduceThreadFactory = + new ThreadFactoryBuilder().setDaemon(false).setPriority(QUERY_RUNNER_THREAD_PRIORITY) + .setNameFormat(REDUCE_THREAD_NAME_FORMAT).build(); + + // ExecutorService is initialized with numThreads same as availableProcessors. + _reduceExecutorService = Executors.newFixedThreadPool(numThreadsInExecutorService, reduceThreadFactory); + } + + protected static void updateAlias(QueryContext queryContext, BrokerResponseNative brokerResponseNative) { + ResultTable resultTable = brokerResponseNative.getResultTable(); + if (resultTable == null) { + return; + } + List<String> aliasList = queryContext.getAliasList(); + if (aliasList.isEmpty()) { + return; + } + + String[] columnNames = resultTable.getDataSchema().getColumnNames(); + List<ExpressionContext> selectExpressions = getSelectExpressions(queryContext.getSelectExpressions()); + int numSelectExpressions = selectExpressions.size(); + // For query like `SELECT *`, we skip alias update. + if (columnNames.length != numSelectExpressions) { + return; + } + for (int i = 0; i < numSelectExpressions; i++) { + String alias = aliasList.get(i); + if (alias != null) { + columnNames[i] = alias; + } + } + } + + protected static List<ExpressionContext> getSelectExpressions(List<ExpressionContext> selectExpressions) { + // NOTE: For DISTINCT queries, need to extract the arguments as the SELECT expressions + if (selectExpressions.size() == 1 && selectExpressions.get(0).getType() == ExpressionContext.Type.FUNCTION + && selectExpressions.get(0).getFunction().getFunctionName().equals("distinct")) { + return selectExpressions.get(0).getFunction().getArguments(); + } + return selectExpressions; + } + + protected static void updateBrokerMetrics(BrokerResponseNative brokerResponseNative, Map<String, String> metadata) { + + } + + protected void shutDown() { + _reduceExecutorService.shutdownNow(); + } + + protected static class BrokerMetricsAggregator { + List<QueryProcessingException> _processingExceptions = new ArrayList<>(); + Map<String, String> _traceInfo = new HashMap<>(); + long _numDocsScanned = 0L; + long _numEntriesScannedInFilter = 0L; + long _numEntriesScannedPostFilter = 0L; + long _numSegmentsQueried = 0L; + long _numSegmentsProcessed = 0L; + long _numSegmentsMatched = 0L; + long _numConsumingSegmentsProcessed = 0L; + long _minConsumingFreshnessTimeMs = Long.MAX_VALUE; + long _numTotalDocs = 0L; + long _offlineThreadCpuTimeNs = 0L; + long _realtimeThreadCpuTimeNs = 0L; + long _offlineSystemActivitiesCpuTimeNs = 0L; + long _realtimeSystemActivitiesCpuTimeNs = 0L; + long _offlineResponseSerializationCpuTimeNs = 0L; + long _realtimeResponseSerializationCpuTimeNs = 0L; + long _offlineTotalCpuTimeNs = 0L; + long _realtimeTotalCpuTimeNs = 0L; + boolean _numGroupsLimitReached = false; + boolean _enableTrace; + + protected BrokerMetricsAggregator(boolean enableTrace) { + _enableTrace = enableTrace; + } + + protected void addMetrics(ServerRoutingInstance routingInstance, DataTable dataTable) { + Map<String, String> metadata = dataTable.getMetadata(); + // Reduce on trace info. + if (_enableTrace) { + _traceInfo.put(routingInstance.getHostname(), metadata.get(MetadataKey.TRACE_INFO.getName())); + } + + // Reduce on exceptions. + Map<Integer, String> exceptions = dataTable.getExceptions(); + for (int key : exceptions.keySet()) { + _processingExceptions.add(new QueryProcessingException(key, exceptions.get(key))); + } + + // Reduce on execution statistics. + String numDocsScannedString = metadata.get(MetadataKey.NUM_DOCS_SCANNED.getName()); + if (numDocsScannedString != null) { + _numDocsScanned += Long.parseLong(numDocsScannedString); + } + String numEntriesScannedInFilterString = metadata.get(MetadataKey.NUM_ENTRIES_SCANNED_IN_FILTER.getName()); + if (numEntriesScannedInFilterString != null) { + _numEntriesScannedInFilter += Long.parseLong(numEntriesScannedInFilterString); + } + String numEntriesScannedPostFilterString = metadata.get(MetadataKey.NUM_ENTRIES_SCANNED_POST_FILTER.getName()); + if (numEntriesScannedPostFilterString != null) { + _numEntriesScannedPostFilter += Long.parseLong(numEntriesScannedPostFilterString); + } + String numSegmentsQueriedString = metadata.get(MetadataKey.NUM_SEGMENTS_QUERIED.getName()); + if (numSegmentsQueriedString != null) { + _numSegmentsQueried += Long.parseLong(numSegmentsQueriedString); + } + + String numSegmentsProcessedString = metadata.get(MetadataKey.NUM_SEGMENTS_PROCESSED.getName()); + if (numSegmentsProcessedString != null) { + _numSegmentsProcessed += Long.parseLong(numSegmentsProcessedString); + } + String numSegmentsMatchedString = metadata.get(MetadataKey.NUM_SEGMENTS_MATCHED.getName()); + if (numSegmentsMatchedString != null) { + _numSegmentsMatched += Long.parseLong(numSegmentsMatchedString); + } + + String numConsumingString = metadata.get(MetadataKey.NUM_CONSUMING_SEGMENTS_PROCESSED.getName()); + if (numConsumingString != null) { + _numConsumingSegmentsProcessed += Long.parseLong(numConsumingString); + } + + String minConsumingFreshnessTimeMsString = metadata.get(MetadataKey.MIN_CONSUMING_FRESHNESS_TIME_MS.getName()); + if (minConsumingFreshnessTimeMsString != null) { + _minConsumingFreshnessTimeMs = + Math.min(Long.parseLong(minConsumingFreshnessTimeMsString), _minConsumingFreshnessTimeMs); + } + + String threadCpuTimeNsString = metadata.get(MetadataKey.THREAD_CPU_TIME_NS.getName()); + if (threadCpuTimeNsString != null) { + if (routingInstance.getTableType() == TableType.OFFLINE) { + _offlineThreadCpuTimeNs += Long.parseLong(threadCpuTimeNsString); + } else { + _realtimeThreadCpuTimeNs += Long.parseLong(threadCpuTimeNsString); + } + } + + String systemActivitiesCpuTimeNsString = metadata.get(MetadataKey.SYSTEM_ACTIVITIES_CPU_TIME_NS.getName()); + if (systemActivitiesCpuTimeNsString != null) { + if (routingInstance.getTableType() == TableType.OFFLINE) { + _offlineSystemActivitiesCpuTimeNs += Long.parseLong(systemActivitiesCpuTimeNsString); + } else { + _realtimeSystemActivitiesCpuTimeNs += Long.parseLong(systemActivitiesCpuTimeNsString); + } + } + + String responseSerializationCpuTimeNsString = metadata.get(MetadataKey.RESPONSE_SER_CPU_TIME_NS.getName()); + if (responseSerializationCpuTimeNsString != null) { + if (routingInstance.getTableType() == TableType.OFFLINE) { + _offlineResponseSerializationCpuTimeNs += Long.parseLong(responseSerializationCpuTimeNsString); + } else { + _realtimeResponseSerializationCpuTimeNs += Long.parseLong(responseSerializationCpuTimeNsString); + } + } + _offlineTotalCpuTimeNs = + _offlineThreadCpuTimeNs + _offlineSystemActivitiesCpuTimeNs + _offlineResponseSerializationCpuTimeNs; + _realtimeTotalCpuTimeNs = + _realtimeThreadCpuTimeNs + _realtimeSystemActivitiesCpuTimeNs + _realtimeResponseSerializationCpuTimeNs; + + String numTotalDocsString = metadata.get(MetadataKey.TOTAL_DOCS.getName()); + if (numTotalDocsString != null) { + _numTotalDocs += Long.parseLong(numTotalDocsString); + } + _numGroupsLimitReached |= Boolean.parseBoolean(metadata.get(MetadataKey.NUM_GROUPS_LIMIT_REACHED.getName())); + } + + protected void setBrokerMetrics(String rawTableName, BrokerResponseNative brokerResponseNative, Review comment: named as `setStats` -- This is an automated message from the Apache Git Service. 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