arunsarin85 commented on code in PR #10951: URL: https://github.com/apache/ozone/pull/10951#discussion_r3721887752
########## hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/om/snapshot/TestOmSnapshotCheckpointDbContent.java: ########## @@ -0,0 +1,424 @@ +/* + * 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.hadoop.ozone.om.snapshot; + +import static org.apache.hadoop.ozone.OzoneConfigKeys.OZONE_SNAPSHOT_DELETING_SERVICE_INTERVAL; +import static org.apache.hadoop.ozone.OzoneConsts.OM_KEY_PREFIX; +import static org.apache.hadoop.ozone.om.OMConfigKeys.OZONE_FILESYSTEM_SNAPSHOT_ENABLED_KEY; +import static org.apache.hadoop.ozone.om.OMConfigKeys.OZONE_SNAPSHOT_DEFRAG_SERVICE_INTERVAL; +import static org.apache.hadoop.ozone.om.OMConfigKeys.SNAPSHOT_DEFRAG_LIMIT_PER_TASK; +import static org.apache.hadoop.ozone.om.codec.OMDBDefinition.BUCKET_TABLE; +import static org.apache.hadoop.ozone.om.codec.OMDBDefinition.KEY_TABLE; +import static org.apache.hadoop.ozone.om.codec.OMDBDefinition.MULTIPART_INFO_TABLE; +import static org.apache.hadoop.ozone.om.codec.OMDBDefinition.OPEN_KEY_TABLE; +import static org.apache.hadoop.ozone.om.codec.OMDBDefinition.VOLUME_TABLE; +import static org.junit.jupiter.api.Assertions.assertEquals; +import static org.junit.jupiter.api.Assertions.assertNotNull; +import static org.junit.jupiter.api.Assertions.assertTrue; +import static org.junit.jupiter.api.Assumptions.assumeTrue; + +import java.io.File; +import java.io.IOException; +import java.nio.file.Paths; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collections; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.SortedMap; +import java.util.TreeMap; +import java.util.UUID; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.TimeoutException; +import org.apache.hadoop.hdds.conf.OzoneConfiguration; +import org.apache.hadoop.hdds.utils.IOUtils; +import org.apache.hadoop.hdds.utils.db.ManagedRawSSTFileReader; +import org.apache.hadoop.hdds.utils.db.RocksDBCheckpoint; +import org.apache.hadoop.hdds.utils.db.Table; +import org.apache.hadoop.hdds.utils.db.Table.KeyValue; +import org.apache.hadoop.hdds.utils.db.Table.KeyValueIterator; +import org.apache.hadoop.hdds.utils.db.TablePrefixInfo; +import org.apache.hadoop.ozone.MiniOzoneCluster; +import org.apache.hadoop.ozone.DataTestUtil; +import org.apache.hadoop.ozone.client.ObjectStore; +import org.apache.hadoop.ozone.client.OzoneBucket; +import org.apache.hadoop.ozone.client.OzoneClient; +import org.apache.hadoop.ozone.om.OMMetadataManager; +import org.apache.hadoop.ozone.om.OmMetadataManagerImpl; +import org.apache.hadoop.ozone.om.OmSnapshot; +import org.apache.hadoop.ozone.om.OmSnapshotManager; +import org.apache.hadoop.ozone.om.OzoneManager; +import org.apache.hadoop.ozone.om.helpers.BucketLayout; +import org.apache.hadoop.ozone.om.helpers.SnapshotInfo; +import org.apache.ozone.test.GenericTestUtils; +import org.apache.ratis.util.function.UncheckedAutoCloseableSupplier; +import org.junit.jupiter.api.AfterEach; +import org.junit.jupiter.api.BeforeEach; +import org.junit.jupiter.api.Test; +import org.junit.jupiter.api.Timeout; + +/** + * HDDS-13217: verify snapshot checkpoint DB content is preserved across defrag iterations. + * + * <p>After defrag compacts a snapshot checkpoint (S' = compact(S)), the on-disk metadata for that + * bucket prefix in the defragged checkpoint must still match the original checkpoint taken at + * snapshot creation time (version 0). + * + * <p>Version-0 checkpoint directories are removed after defrag, so baselines are captured before + * the first defrag iteration and compared against the active snapshot after defrag completes. + * + * <p>Each test method starts a fresh MiniOzone cluster to avoid cross-test interference on the + * global snapshot defrag chain. + */ +@Timeout(value = 15, unit = TimeUnit.MINUTES) +public class TestOmSnapshotCheckpointDbContent { + + private static final byte[] TEST_KEY_CONTENT = new byte[] {0x61, 0x62, 0x63}; + private static final int CHECKPOINT_WAIT_MS = 120_000; + private static final int DEFRAG_WAIT_MS = 600_000; + + private MiniOzoneCluster cluster; + private OzoneConfiguration conf; + private OzoneClient client; + private ObjectStore store; + + @BeforeEach + void initCluster() throws Exception { + assumeTrue(ManagedRawSSTFileReader.tryLoadLibrary(), + "Snapshot defrag requires rocks-tools native library"); + + conf = new OzoneConfiguration(); + conf.setBoolean(OZONE_FILESYSTEM_SNAPSHOT_ENABLED_KEY, true); + conf.setInt(OZONE_SNAPSHOT_DEFRAG_SERVICE_INTERVAL, 7200); + conf.setInt(SNAPSHOT_DEFRAG_LIMIT_PER_TASK, 10); + conf.setTimeDuration(OZONE_SNAPSHOT_DELETING_SERVICE_INTERVAL, 1, TimeUnit.SECONDS); + + cluster = MiniOzoneCluster.newBuilder(conf).setNumDatanodes(3).build(); + cluster.waitForClusterToBeReady(); + client = cluster.newClient(); + store = client.getObjectStore(); + } + + @AfterEach + void shutdownCluster() { + IOUtils.closeQuietly(client); + IOUtils.closeQuietly(cluster); + } + + /** + * Test#1 from HDDS-13217: create S1, S2, S3 on one bucket, run defrag, and verify each + * defragged checkpoint still matches its version-0 baseline. + */ + @Test + public void testDefragPreservesSnapshotCheckpointContent() + throws Exception { + ThreeSnapshotSetup setup = createThreeSnapshotsOnNewBucket(); + triggerDefragUntilDone(setup.snapshots); + assertCheckpointMatchesBaseline(setup.baselines, setup.snapshots); + } + + /** + * Test#2 from HDDS-13217: after an initial defrag pass, delete the middle snapshot, run defrag + * again, and verify the remaining youngest snapshot checkpoint still matches its baseline. + */ + @Test + public void testDefragAfterSnapshotDeletePreservesRemainingSnapshot() + throws Exception { + ThreeSnapshotSetup setup = createThreeSnapshotsOnNewBucket(); + triggerDefragUntilDone(setup.snapshots); Review Comment: Addressed. -- This is an automated message from the Apache Git Service. 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