| /* |
| * 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 java.util.ArrayList; |
| import java.util.List; |
| import java.util.stream.Collectors; |
| |
| import org.apache.sysds.runtime.controlprogram.caching.MatrixObject; |
| import org.apache.sysds.runtime.controlprogram.paramserv.ParamservUtils; |
| import org.apache.sysds.runtime.matrix.data.MatrixBlock; |
| |
| /** |
| * Disjoint_Contiguous data partitioner: |
| * |
| * for each worker, use a right indexing |
| * operation X[beg:end,] to obtain contiguous, |
| * non-overlapping partitions of rows. |
| */ |
| public class DCLocalScheme extends DataPartitionLocalScheme { |
| |
| public static List<MatrixBlock> partition(int k, MatrixBlock mb) { |
| List<MatrixBlock> list = new ArrayList<>(); |
| long stepSize = (long) Math.ceil((double) mb.getNumRows() / k); |
| long begin = 1; |
| while (begin < mb.getNumRows()) { |
| long end = Math.min(begin - 1 + stepSize, mb.getNumRows()); |
| MatrixBlock pmo = ParamservUtils.sliceMatrixBlock(mb, begin, end); |
| list.add(pmo); |
| begin = end + 1; |
| } |
| return list; |
| } |
| |
| private static List<MatrixObject> doPartitioning(int k, MatrixBlock mb) { |
| return partition(k, mb).stream().map(ParamservUtils::newMatrixObject).collect(Collectors.toList()); |
| } |
| |
| @Override |
| public Result doPartitioning(int workersNum, MatrixBlock features, MatrixBlock labels) { |
| List<MatrixObject> pfs = doPartitioning(workersNum, features); |
| List<MatrixObject> pls = doPartitioning(workersNum, labels); |
| return new Result(pfs, pls); |
| } |
| } |