| /* |
| * 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.lops; |
| |
| import org.apache.spark.storage.StorageLevel; |
| import org.apache.sysds.lops.LopProperties.ExecType; |
| import org.apache.sysds.runtime.instructions.InstructionUtils; |
| import org.apache.sysds.common.Types.DataType; |
| import org.apache.sysds.common.Types.ValueType; |
| |
| |
| /** |
| * Lop for checkpoint operations. For example, on Spark, the semantic of a checkpoint |
| * is to persist an intermediate result into a specific storage level (e.g., mem_only). |
| * |
| * We use the name checkpoint in terms of cache/persist in Spark (not in terms of checkpoint |
| * in Spark streaming) in order to differentiate from CP caching. |
| * |
| * NOTE: since this class uses spark apis, it should only be instantiated if we are |
| * running in execution mode spark (whenever all spark libraries are available) |
| */ |
| public class Checkpoint extends Lop |
| { |
| public static final String OPCODE = "chkpoint"; |
| |
| public static final StorageLevel DEFAULT_STORAGE_LEVEL = StorageLevel.MEMORY_AND_DISK(); |
| public static final StorageLevel SER_STORAGE_LEVEL = StorageLevel.MEMORY_AND_DISK_SER(); |
| public static final boolean CHECKPOINT_SPARSE_CSR = true; |
| |
| private StorageLevel _storageLevel; |
| |
| |
| /** |
| * TODO change string parameter storage.level to StorageLevel as soon as we can assume |
| * that Spark libraries are always available. |
| * |
| * @param input low-level operator |
| * @param dt data type |
| * @param vt value type |
| * @param level storage level |
| */ |
| public Checkpoint(Lop input, DataType dt, ValueType vt, String level) { |
| super(Lop.Type.Checkpoint, dt, vt); |
| addInput(input); |
| input.addOutput(this); |
| |
| _storageLevel = StorageLevel.fromString(level); |
| lps.setProperties(inputs, ExecType.SPARK); |
| } |
| |
| public StorageLevel getStorageLevel() |
| { |
| return _storageLevel; |
| } |
| |
| public void setStorageLevel(StorageLevel level) |
| { |
| _storageLevel = level; |
| } |
| |
| @Override |
| public String toString() { |
| return "Checkpoint - storage.level = " + _storageLevel.toString(); |
| } |
| |
| @Override |
| public String getInstructions(String input1, String output) { |
| //valid execution type |
| if(getExecType() != ExecType.SPARK) { |
| throw new LopsException("Wrong execution type for Checkpoint.getInstructions (expected: SPARK, found: "+getExecType()+")."); |
| } |
| |
| return InstructionUtils.concatOperands( |
| getExecType().name(), |
| OPCODE, |
| getInputs().get(0).prepInputOperand(input1), |
| prepOutputOperand(output), |
| getStorageLevelString(_storageLevel)); |
| } |
| |
| /** |
| * This is a utility method because Sparks StorageLevel.toString() is incompatible with its own |
| * fromString() method. |
| * |
| * @param level RDD storage level |
| * @return storage level as a string |
| */ |
| public static String getStorageLevelString( StorageLevel level) |
| { |
| if( StorageLevel.NONE().equals(level) ) |
| return "NONE"; |
| else if( StorageLevel.MEMORY_ONLY().equals(level) ) |
| return "MEMORY_ONLY"; |
| else if( StorageLevel.MEMORY_ONLY_2().equals(level) ) |
| return "MEMORY_ONLY_2"; |
| else if( StorageLevel.MEMORY_ONLY_SER().equals(level) ) |
| return "MEMORY_ONLY_SER"; |
| else if( StorageLevel.MEMORY_ONLY_SER_2().equals(level) ) |
| return "MEMORY_ONLY_SER_2"; |
| else if( StorageLevel.MEMORY_AND_DISK().equals(level) ) |
| return "MEMORY_AND_DISK"; |
| else if( StorageLevel.MEMORY_AND_DISK_2().equals(level) ) |
| return "MEMORY_AND_DISK_2"; |
| else if( StorageLevel.MEMORY_AND_DISK_SER().equals(level) ) |
| return "MEMORY_AND_DISK_SER"; |
| else if( StorageLevel.MEMORY_AND_DISK_SER_2().equals(level) ) |
| return "MEMORY_AND_DISK_SER_2"; |
| else if( StorageLevel.DISK_ONLY().equals(level) ) |
| return "DISK_ONLY"; |
| else if( StorageLevel.DISK_ONLY_2().equals(level) ) |
| return "DISK_ONLY_2"; |
| |
| return "INVALID"; |
| } |
| |
| public static String getDefaultStorageLevelString() { |
| return getStorageLevelString( DEFAULT_STORAGE_LEVEL ); |
| } |
| |
| public static String getSerializeStorageLevelString() { |
| return getStorageLevelString( SER_STORAGE_LEVEL ); |
| } |
| } |