| /* |
| * 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.sysds.runtime.controlprogram.paramserv.dp; |
| |
| import org.apache.sysds.runtime.DMLRuntimeException; |
| import org.apache.sysds.runtime.controlprogram.caching.CacheableData; |
| import org.apache.sysds.runtime.controlprogram.caching.MatrixObject; |
| import org.apache.sysds.runtime.controlprogram.context.ExecutionContext; |
| import org.apache.sysds.runtime.controlprogram.federated.FederatedData; |
| import org.apache.sysds.runtime.controlprogram.federated.FederatedRequest; |
| import org.apache.sysds.runtime.controlprogram.federated.FederatedResponse; |
| import org.apache.sysds.runtime.controlprogram.federated.FederatedUDF; |
| import org.apache.sysds.runtime.controlprogram.paramserv.ParamservUtils; |
| import org.apache.sysds.runtime.instructions.cp.Data; |
| import org.apache.sysds.runtime.matrix.data.MatrixBlock; |
| import org.apache.sysds.runtime.meta.DataCharacteristics; |
| |
| import java.util.List; |
| import java.util.concurrent.Future; |
| |
| public class BalanceToAvgFederatedScheme extends DataPartitionFederatedScheme { |
| @Override |
| public Result doPartitioning(MatrixObject features, MatrixObject labels) { |
| List<MatrixObject> pFeatures = sliceFederatedMatrix(features); |
| List<MatrixObject> pLabels = sliceFederatedMatrix(labels); |
| |
| int average_num_rows = (int) Math.round(pFeatures.stream().map(CacheableData::getNumRows).mapToInt(Long::intValue).average().orElse(Double.NaN)); |
| |
| for(int i = 0; i < pFeatures.size(); i++) { |
| // Works, because the map contains a single entry |
| FederatedData featuresData = (FederatedData) pFeatures.get(i).getFedMapping().getMap().values().toArray()[0]; |
| FederatedData labelsData = (FederatedData) pLabels.get(i).getFedMapping().getMap().values().toArray()[0]; |
| |
| Future<FederatedResponse> udfResponse = featuresData.executeFederatedOperation(new FederatedRequest(FederatedRequest.RequestType.EXEC_UDF, |
| featuresData.getVarID(), new balanceDataOnFederatedWorker(new long[]{featuresData.getVarID(), labelsData.getVarID()}, average_num_rows))); |
| |
| try { |
| FederatedResponse response = udfResponse.get(); |
| if(!response.isSuccessful()) |
| throw new DMLRuntimeException("FederatedDataPartitioner BalanceFederatedScheme: balance UDF returned fail"); |
| } |
| catch(Exception e) { |
| throw new DMLRuntimeException("FederatedDataPartitioner BalanceFederatedScheme: executing balance UDF failed" + e.getMessage()); |
| } |
| |
| DataCharacteristics update = pFeatures.get(i).getDataCharacteristics().setRows(average_num_rows); |
| pFeatures.get(i).updateDataCharacteristics(update); |
| update = pLabels.get(i).getDataCharacteristics().setRows(average_num_rows); |
| pLabels.get(i).updateDataCharacteristics(update); |
| } |
| |
| return new Result(pFeatures, pLabels, pFeatures.size(), getBalanceMetrics(pFeatures)); |
| } |
| |
| /** |
| * Balance UDF executed on the federated worker |
| */ |
| private static class balanceDataOnFederatedWorker extends FederatedUDF { |
| private static final long serialVersionUID = 6631958250346625546L; |
| private final int _average_num_rows; |
| |
| protected balanceDataOnFederatedWorker(long[] inIDs, int average_num_rows) { |
| super(inIDs); |
| _average_num_rows = average_num_rows; |
| } |
| |
| @Override |
| public FederatedResponse execute(ExecutionContext ec, Data... data) { |
| MatrixObject features = (MatrixObject) data[0]; |
| MatrixObject labels = (MatrixObject) data[1]; |
| |
| if(features.getNumRows() > _average_num_rows) { |
| // generate subsampling matrix |
| MatrixBlock subsampleMatrixBlock = ParamservUtils.generateSubsampleMatrix(_average_num_rows, Math.toIntExact(features.getNumRows()), System.currentTimeMillis()); |
| subsampleTo(features, subsampleMatrixBlock); |
| subsampleTo(labels, subsampleMatrixBlock); |
| } |
| else if(features.getNumRows() < _average_num_rows) { |
| int num_rows_needed = _average_num_rows - Math.toIntExact(features.getNumRows()); |
| // generate replication matrix |
| MatrixBlock replicateMatrixBlock = ParamservUtils.generateReplicationMatrix(num_rows_needed, Math.toIntExact(features.getNumRows()), System.currentTimeMillis()); |
| replicateTo(features, replicateMatrixBlock); |
| replicateTo(labels, replicateMatrixBlock); |
| } |
| |
| return new FederatedResponse(FederatedResponse.ResponseType.SUCCESS); |
| } |
| } |
| } |