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/*
* 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.spark.api.java;
import org.apache.spark.storage.StorageLevel;
/**
* Expose some commonly useful storage level constants.
*/
public class StorageLevels {
public static final StorageLevel NONE = create(false, false, false, false, 1);
public static final StorageLevel DISK_ONLY = create(true, false, false, false, 1);
public static final StorageLevel DISK_ONLY_2 = create(true, false, false, false, 2);
public static final StorageLevel MEMORY_ONLY = create(false, true, false, true, 1);
public static final StorageLevel MEMORY_ONLY_2 = create(false, true, false, true, 2);
public static final StorageLevel MEMORY_ONLY_SER = create(false, true, false, false, 1);
public static final StorageLevel MEMORY_ONLY_SER_2 = create(false, true, false, false, 2);
public static final StorageLevel MEMORY_AND_DISK = create(true, true, false, true, 1);
public static final StorageLevel MEMORY_AND_DISK_2 = create(true, true, false, true, 2);
public static final StorageLevel MEMORY_AND_DISK_SER = create(true, true, false, false, 1);
public static final StorageLevel MEMORY_AND_DISK_SER_2 = create(true, true, false, false, 2);
public static final StorageLevel OFF_HEAP = create(true, true, true, false, 1);
/**
* Create a new StorageLevel object.
* @param useDisk saved to disk, if true
* @param useMemory saved to on-heap memory, if true
* @param useOffHeap saved to off-heap memory, if true
* @param deserialized saved as deserialized objects, if true
* @param replication replication factor
*/
public static StorageLevel create(
boolean useDisk,
boolean useMemory,
boolean useOffHeap,
boolean deserialized,
int replication) {
return StorageLevel.apply(useDisk, useMemory, useOffHeap, deserialized, replication);
}
}
