tillrohrmann commented on a change in pull request #9501: [FLINK-12697] [State Backends] Support on-disk state storage for spill-able heap backend URL: https://github.com/apache/flink/pull/9501#discussion_r321353063
########## File path: flink-state-backends/flink-statebackend-heap-spillable/src/test/java/org/apache/flink/runtime/state/heap/CopyOnWriteSkipListStateMapTest.java ########## @@ -0,0 +1,1448 @@ +/* + * + * * 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.flink.runtime.state.heap; + +import org.apache.flink.api.common.typeutils.TypeSerializer; +import org.apache.flink.api.common.typeutils.base.IntSerializer; +import org.apache.flink.api.common.typeutils.base.LongSerializer; +import org.apache.flink.api.common.typeutils.base.StringSerializer; +import org.apache.flink.core.memory.ByteArrayInputStreamWithPos; +import org.apache.flink.core.memory.ByteArrayOutputStreamWithPos; +import org.apache.flink.core.memory.DataInputView; +import org.apache.flink.core.memory.DataInputViewStreamWrapper; +import org.apache.flink.core.memory.DataOutputView; +import org.apache.flink.core.memory.DataOutputViewStreamWrapper; +import org.apache.flink.runtime.state.StateEntry; +import org.apache.flink.runtime.state.StateSnapshotTransformer; +import org.apache.flink.runtime.state.StateTransformationFunction; +import org.apache.flink.runtime.state.heap.space.Allocator; +import org.apache.flink.runtime.state.internal.InternalKvState; +import org.apache.flink.util.IOUtils; +import org.apache.flink.util.TestLogger; + +import org.junit.After; +import org.junit.Assert; +import org.junit.Before; +import org.junit.Test; + +import javax.annotation.Nullable; + +import java.io.IOException; +import java.nio.ByteBuffer; +import java.util.ArrayList; +import java.util.Collection; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Iterator; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.concurrent.ThreadLocalRandom; + +import static org.apache.flink.runtime.state.heap.SkipListUtils.NIL_NODE; +import static org.hamcrest.Matchers.is; +import static org.junit.Assert.assertEquals; +import static org.junit.Assert.assertFalse; +import static org.junit.Assert.assertNull; +import static org.junit.Assert.assertTrue; + +/** + * Tests for {@link CopyOnWriteSkipListStateMap}. + */ +public class CopyOnWriteSkipListStateMapTest extends TestLogger { + + private TestAllocator spaceAllocator; + + @Before + public void setUp() { + int maxAllocateSize = 256; + spaceAllocator = new TestAllocator(maxAllocateSize); + } + + @After + public void tearDown() { + IOUtils.closeQuietly(spaceAllocator); + } + + /** + * Test initialization of state map. + */ + @Test + public void testInitStateMap() { + TypeSerializer<Integer> keySerializer = IntSerializer.INSTANCE; + TypeSerializer<Long> namespaceSerializer = LongSerializer.INSTANCE; + TypeSerializer<String> stateSerializer = StringSerializer.INSTANCE; + CopyOnWriteSkipListStateMap<Integer, Long, String> stateMap = new CopyOnWriteSkipListStateMap<>( + keySerializer, namespaceSerializer, stateSerializer, spaceAllocator); + + assertTrue(stateMap.isEmpty()); + assertEquals(0, stateMap.size()); + assertEquals(0, stateMap.totalSize()); + assertEquals(0, stateMap.getRequestCount()); + assertTrue(stateMap.getLogicallyRemovedNodes().isEmpty()); + assertEquals(0, stateMap.getHighestRequiredSnapshotVersion()); + assertEquals(0, stateMap.getHighestFinishedSnapshotVersion()); + assertTrue(stateMap.getSnapshotVersions().isEmpty()); + assertTrue(stateMap.getPruningValueNodes().isEmpty()); + assertEquals(0, stateMap.getResourceGuard().getLeaseCount()); + assertFalse(stateMap.getResourceGuard().isClosed()); + assertFalse(stateMap.isClosed()); + + assertNull(stateMap.get(0, 0L)); + assertFalse(stateMap.containsKey(1, 2L)); + assertNull(stateMap.removeAndGetOld(3, 4L)); + assertFalse(stateMap.getKeys(-92L).iterator().hasNext()); + assertEquals(0, stateMap.sizeOfNamespace(8L)); + assertFalse(stateMap.iterator().hasNext()); + assertFalse(stateMap.getStateIncrementalVisitor(100).hasNext()); + + stateMap.close(); + assertEquals(0, stateMap.size()); + assertEquals(0, stateMap.totalSize()); + assertTrue(stateMap.isClosed()); + } + + /** + * Test basic operations. + */ + @Test + public void testBasicOperations() throws Exception { + TypeSerializer<Integer> keySerializer = IntSerializer.INSTANCE; + TypeSerializer<Long> namespaceSerializer = LongSerializer.INSTANCE; + TypeSerializer<String> stateSerializer = StringSerializer.INSTANCE; + CopyOnWriteSkipListStateMap<Integer, Long, String> stateMap = new CopyOnWriteSkipListStateMap<>( + keySerializer, namespaceSerializer, stateSerializer, spaceAllocator); + + ThreadLocalRandom random = ThreadLocalRandom.current(); + // map to store expected states, namespace -> key -> state + Map<Long, Map<Integer, String>> referenceStates = new HashMap<>(); + int totalSize = 0; + + // put some states + for (long namespace = 0; namespace < 10; namespace++) { + for (int key = 0; key < 100; key++) { + totalSize++; + String state = String.valueOf(key * namespace); + if (random.nextBoolean()) { + stateMap.put(key, namespace, state); + } else { + assertNull(stateMap.putAndGetOld(key, namespace, state)); + } + referenceStates.computeIfAbsent(namespace, (none) -> new HashMap<>()).put(key, state); + assertEquals(totalSize, stateMap.size()); + assertEquals(totalSize, stateMap.totalSize()); + } + } + + // validates space allocation. Each pair need 2 spaces + assertEquals(totalSize * 2, spaceAllocator.getTotalSpaceNumber()); + verifyState(referenceStates, stateMap); + + // remove some states + Map<Long, Set<Integer>> removedStates = new HashMap<>(); + for (Map.Entry<Long, Map<Integer, String>> namespaceEntry : referenceStates.entrySet()) { + long namespace = namespaceEntry.getKey(); + for (Map.Entry<Integer, String> keyEntry : namespaceEntry.getValue().entrySet()) { + if (random.nextBoolean()) { + int key = keyEntry.getKey(); + String state = keyEntry.getValue(); + removedStates.computeIfAbsent(namespace, (none) -> new HashSet<>()).add(key); + totalSize--; + if (random.nextBoolean()) { + stateMap.remove(key, namespace); + } else { + assertEquals(state, stateMap.removeAndGetOld(key, namespace)); + } + assertEquals(totalSize, stateMap.size()); + assertEquals(totalSize, stateMap.totalSize()); + } + } + } + + for (Map.Entry<Long, Set<Integer>> entry : removedStates.entrySet()) { + long namespace = entry.getKey(); + Map<Integer, String> keyMap = referenceStates.get(namespace); + if (keyMap != null) { + entry.getValue().forEach(keyMap::remove); + if (keyMap.isEmpty()) { + referenceStates.remove(namespace); + } + } + for (int key : entry.getValue()) { + assertNull(stateMap.get(key, namespace)); + assertFalse(stateMap.containsKey(key, namespace)); + } + } + + assertEquals(totalSize * 2, spaceAllocator.getTotalSpaceNumber()); + verifyState(referenceStates, stateMap); + + // update some states + for (Map.Entry<Long, Map<Integer, String>> namespaceEntry : referenceStates.entrySet()) { + long namespace = namespaceEntry.getKey(); + for (Map.Entry<Integer, String> keyEntry : namespaceEntry.getValue().entrySet()) { + if (random.nextBoolean()) { + int key = keyEntry.getKey(); + String state = keyEntry.getValue(); + String newState = state + "-update"; + keyEntry.setValue(newState); + if (random.nextBoolean()) { + stateMap.put(key, namespace, newState); + } else { + assertEquals(state, stateMap.putAndGetOld(key, namespace, newState)); + } + assertEquals(totalSize, stateMap.size()); + assertEquals(totalSize, stateMap.totalSize()); + } + } + } + + // put some new states + for (long namespace = 10; namespace < 15; namespace++) { + for (int key = 0; key < 100; key++) { + totalSize++; + String state = String.valueOf(key * namespace); + if (random.nextBoolean()) { + stateMap.put(key, namespace, state); + } else { + assertNull(stateMap.putAndGetOld(key, namespace, state)); + } + referenceStates.computeIfAbsent(namespace, (none) -> new HashMap<>()).put(key, state); + assertEquals(totalSize, stateMap.size()); + assertEquals(totalSize, stateMap.totalSize()); + } + } + + // remove some absent states + for (Map.Entry<Long, Set<Integer>> entry : removedStates.entrySet()) { + long namespace = entry.getKey(); + for (int key : entry.getValue()) { + if (random.nextBoolean()) { + stateMap.remove(key, namespace); + } else { + assertNull(stateMap.removeAndGetOld(key, namespace)); + } + assertEquals(totalSize, stateMap.size()); + assertEquals(totalSize, stateMap.totalSize()); + } + } + + assertEquals(totalSize * 2, spaceAllocator.getTotalSpaceNumber()); + verifyState(referenceStates, stateMap); + + StateTransformationFunction<String, Integer> function = + (String prevState, Integer value) -> prevState == null ? String.valueOf(value) : prevState + value; + + // transform some old states + for (Map.Entry<Long, Map<Integer, String>> namespaceEntry : referenceStates.entrySet()) { + long namespace = namespaceEntry.getKey(); + for (Map.Entry<Integer, String> keyEntry : namespaceEntry.getValue().entrySet()) { + if (random.nextBoolean()) { + int key = keyEntry.getKey(); + String state = keyEntry.getValue(); + int delta = random.nextInt(); + String newState = function.apply(state, delta); + keyEntry.setValue(newState); + stateMap.transform(key, namespace, delta, function); + assertEquals(totalSize, stateMap.size()); + assertEquals(totalSize, stateMap.totalSize()); + } + } + } + + // transform some new states + for (long namespace = 15; namespace < 20; namespace++) { + for (int key = 0; key < 100; key++) { + totalSize++; + int value = (int) (key * namespace); + stateMap.transform(key, namespace, value, function); + referenceStates.computeIfAbsent(namespace, (none) -> new HashMap<>()).put(key, String.valueOf(value)); + assertEquals(totalSize, stateMap.size()); + assertEquals(totalSize, stateMap.totalSize()); + } + } + + assertEquals(totalSize * 2, spaceAllocator.getTotalSpaceNumber()); + verifyState(referenceStates, stateMap); + + // put some previously removed states + for (Map.Entry<Long, Set<Integer>> entry : removedStates.entrySet()) { + long namespace = entry.getKey(); + for (int key : entry.getValue()) { + totalSize++; + String state = String.valueOf(key * namespace); + if (random.nextBoolean()) { + stateMap.put(key, namespace, state); + } else { + assertNull(stateMap.putAndGetOld(key, namespace, state)); + } + referenceStates.computeIfAbsent(namespace, (none) -> new HashMap<>()).put(key, String.valueOf(state)); + assertEquals(totalSize, stateMap.size()); + assertEquals(totalSize, stateMap.totalSize()); + } + } + + assertEquals(totalSize * 2, spaceAllocator.getTotalSpaceNumber()); + verifyState(referenceStates, stateMap); + + // remove some namespaces + Set<Long> removedNamespaces = new HashSet<>(); + for (Map.Entry<Long, Map<Integer, String>> namespaceEntry : referenceStates.entrySet()) { + if (random.nextBoolean()) { + long namespace = namespaceEntry.getKey(); + removedNamespaces.add(namespace); + for (Map.Entry<Integer, String> keyEntry : namespaceEntry.getValue().entrySet()) { + int key = keyEntry.getKey(); + if (random.nextBoolean()) { + stateMap.remove(key, namespace); + } else { + assertEquals(keyEntry.getValue(), stateMap.removeAndGetOld(key, namespace)); + } + totalSize--; + assertEquals(totalSize, stateMap.size()); + assertEquals(totalSize, stateMap.totalSize()); + } + } + } + + for (long namespace : removedNamespaces) { + referenceStates.remove(namespace); + assertEquals(0, stateMap.sizeOfNamespace(namespace)); + assertFalse(stateMap.getKeys(namespace).iterator().hasNext()); + } + + assertEquals(totalSize * 2, spaceAllocator.getTotalSpaceNumber()); + verifyState(referenceStates, stateMap); + + stateMap.close(); + assertEquals(0, stateMap.size()); + assertEquals(0, stateMap.totalSize()); + // all spaces should be free + assertEquals(0, spaceAllocator.getTotalSpaceNumber()); + assertTrue(stateMap.isClosed()); + } + + /** + * Tests copy-on-write contracts. + */ + @SuppressWarnings("unchecked") + @Test + public void testCopyOnWriteContracts() throws IOException { + TypeSerializer<Integer> keySerializer = IntSerializer.INSTANCE; + TypeSerializer<Long> namespaceSerializer = LongSerializer.INSTANCE; + TypeSerializer<String> stateSerializer = StringSerializer.INSTANCE; + // do not remove states physically when get, put, remove and snapshot + CopyOnWriteSkipListStateMap<Integer, Long, String> stateMap = new CopyOnWriteSkipListStateMap<>( + keySerializer, + namespaceSerializer, + stateSerializer, + spaceAllocator, + 0, + 1.0f); + + StateSnapshotTransformer<String> transformer = new StateSnapshotTransformer<String>() { + @Nullable + @Override + public String filterOrTransform(@Nullable String value) { + if (value == null) { + return null; + } + int op = value.hashCode() % 3; + switch (op) { + case 0: + return null; + case 1: + return value + "-transform"; + default: + return value; + } + } + }; + + // map to store expected states, namespace -> key -> state + Map<Long, Map<Integer, String>> referenceStates = new HashMap<>(); + int totalStateSize = 0; + int totalSizeIncludingLogicalRemovedKey = 0; + int totalLogicallyRemovedKey = 0; + int totalSpaceNumber = 0; + + // take snapshot 1 which is an empty snapshot + Map<Long, Map<Integer, String>> expectedSnapshot1 = snapshotReferenceStates(referenceStates); + CopyOnWriteSkipListStateMapSnapshot<Integer, Long, String> snapshot1 = + (CopyOnWriteSkipListStateMapSnapshot<Integer, Long, String>) stateMap.stateSnapshot(); + assertEquals(1, stateMap.getHighestRequiredSnapshotVersion()); + assertEquals(1, stateMap.getSnapshotVersions().size()); + assertEquals(true, stateMap.getSnapshotVersions().contains(1)); Review comment: could be simplified to `assertTrue` ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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