sumitagrawl commented on code in PR #4244: URL: https://github.com/apache/ozone/pull/4244#discussion_r1100288740
########## hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/service/SnapshotDeletingService.java: ########## @@ -0,0 +1,378 @@ +/* + * 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.service; + +import com.google.common.annotations.VisibleForTesting; +import com.google.protobuf.ServiceException; +import org.apache.hadoop.hdds.conf.OzoneConfiguration; +import org.apache.hadoop.hdds.utils.BackgroundService; +import org.apache.hadoop.hdds.utils.BackgroundTask; +import org.apache.hadoop.hdds.utils.BackgroundTaskQueue; +import org.apache.hadoop.hdds.utils.BackgroundTaskResult; +import org.apache.hadoop.hdds.utils.db.Table; +import org.apache.hadoop.hdds.utils.db.TableIterator; +import org.apache.hadoop.ozone.ClientVersion; +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.SnapshotChainManager; +import org.apache.hadoop.ozone.om.helpers.OMRatisHelper; +import org.apache.hadoop.ozone.om.helpers.OmBucketInfo; +import org.apache.hadoop.ozone.om.helpers.OmKeyInfo; +import org.apache.hadoop.ozone.om.helpers.RepeatedOmKeyInfo; +import org.apache.hadoop.ozone.om.helpers.SnapshotInfo; +import org.apache.hadoop.ozone.om.ratis.OzoneManagerRatisServer; +import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos.KeyValuePair; +import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos.OMRequest; +import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos.SnapshotMoveDeletedKeysRequest; +import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos.Type; +import org.apache.ratis.protocol.ClientId; +import org.apache.ratis.protocol.Message; +import org.apache.ratis.protocol.RaftClientRequest; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.List; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.concurrent.atomic.AtomicLong; + +import static org.apache.hadoop.ozone.om.OMConfigKeys.SNAPSHOT_DELETING_LIMIT_PER_TASK; +import static org.apache.hadoop.ozone.om.OMConfigKeys.SNAPSHOT_DELETING_LIMIT_PER_TASK_DEFAULT; +import static org.apache.hadoop.ozone.om.OmSnapshotManager.getSnapshotPrefix; + +/** + * Background Service to clean-up deleted snapshot and reclaim space. + */ +public class SnapshotDeletingService extends BackgroundService { + private static final Logger LOG = + LoggerFactory.getLogger(SnapshotDeletingService.class); + + // Use only a single thread for Snapshot Deletion. Multiple threads would read + // from the same table and can send deletion requests for same snapshot + // multiple times. + private static final int SNAPSHOT_DELETING_CORE_POOL_SIZE = 1; + private final ClientId clientId = ClientId.randomId(); + private final AtomicLong runCount; + + private final OzoneManager ozoneManager; + private final OmSnapshotManager omSnapshotManager; + private final SnapshotChainManager chainManager; + private final AtomicBoolean suspended; + private final OzoneConfiguration conf; + private final AtomicLong successRunCount; + private final long snapshotDeletionPerTask; + + public SnapshotDeletingService(long interval, long serviceTimeout, + OzoneManager ozoneManager) throws IOException { + super("SnapshotDeletingService", interval, TimeUnit.MILLISECONDS, + SNAPSHOT_DELETING_CORE_POOL_SIZE, serviceTimeout); + this.ozoneManager = ozoneManager; + this.omSnapshotManager = ozoneManager.getOmSnapshotManager(); + this.chainManager = ozoneManager.getSnapshotChainManager(); + this.runCount = new AtomicLong(0); + this.successRunCount = new AtomicLong(0); + this.suspended = new AtomicBoolean(false); + this.conf = ozoneManager.getConfiguration(); + this.snapshotDeletionPerTask = conf + .getLong(SNAPSHOT_DELETING_LIMIT_PER_TASK, + SNAPSHOT_DELETING_LIMIT_PER_TASK_DEFAULT); + } + + private class SnapshotDeletingTask implements BackgroundTask { + + @Override + public BackgroundTaskResult call() throws Exception { + if (!shouldRun()) { + return BackgroundTaskResult.EmptyTaskResult.newResult(); + } + + runCount.incrementAndGet(); + + Table<String, SnapshotInfo> snapshotInfoTable = + ozoneManager.getMetadataManager().getSnapshotInfoTable(); + try (TableIterator<String, ? extends Table.KeyValue + <String, SnapshotInfo>> iterator = snapshotInfoTable.iterator()) { + iterator.seekToFirst(); + + long snapshotLimit = snapshotDeletionPerTask; + + while (iterator.hasNext() && snapshotLimit > 0) { + SnapshotInfo snapInfo = iterator.next().getValue(); + SnapshotInfo.SnapshotStatus snapshotStatus = + snapInfo.getSnapshotStatus(); + + // Only Iterate in deleted snapshot + if (!snapshotStatus.equals( + SnapshotInfo.SnapshotStatus.SNAPSHOT_DELETED)) { + continue; + } + + OmSnapshot omSnapshot = (OmSnapshot) omSnapshotManager + .checkForSnapshot(snapInfo.getVolumeName(), + snapInfo.getBucketName(), + getSnapshotPrefix(snapInfo.getName())); + + Table<String, RepeatedOmKeyInfo> snapshotDeletedTable = + omSnapshot.getMetadataManager().getDeletedTable(); + + if (snapshotDeletedTable.getEstimatedKeyCount() == 0) { + continue; + } + + // Get bucketInfo for the snapshot bucket to get bucket layout. + String dbBucketKey = ozoneManager.getMetadataManager().getBucketKey( + snapInfo.getVolumeName(), snapInfo.getBucketName()); + OmBucketInfo bucketInfo = ozoneManager.getMetadataManager() + .getBucketTable().get(dbBucketKey); + + + chainManager.loadFromSnapshotInfoTable( + ozoneManager.getMetadataManager()); + SnapshotInfo nextSnapshot = getNextNonDeletedSnapshot(snapInfo); + + SnapshotInfo previousSnapshot = getPreviousSnapshot(snapInfo); + Table<String, OmKeyInfo> previousKeyTable = null; + OmSnapshot omPreviousSnapshot = null; + + // Handle case when the deleted snapshot is the first snapshot. + // Move deleted keys to activeDB's deletedKeyTable + if (previousSnapshot != null) { + omPreviousSnapshot = (OmSnapshot) omSnapshotManager + .checkForSnapshot(previousSnapshot.getVolumeName(), + previousSnapshot.getBucketName(), + getSnapshotPrefix(previousSnapshot.getName())); + + previousKeyTable = omPreviousSnapshot + .getMetadataManager().getKeyTable(bucketInfo.getBucketLayout()); + } + + // Move key to either next non deleted snapshot's snapshotDeletedTable + // or move to active object store deleted table + + List<KeyValuePair> toActiveDBList = new ArrayList<>(); + List<KeyValuePair> toNextDBList = new ArrayList<>(); + + try (TableIterator<String, ? extends Table.KeyValue<String, + RepeatedOmKeyInfo>> deletedIterator = snapshotDeletedTable + .iterator()) { + + iterator.seekToFirst(); + + while (deletedIterator.hasNext()) { + Table.KeyValue<String, RepeatedOmKeyInfo> Review Comment: Do we need set limit for number of deletedKeys? similar to keyDeletingService ########## hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/service/SnapshotDeletingService.java: ########## @@ -0,0 +1,378 @@ +/* + * 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.service; + +import com.google.common.annotations.VisibleForTesting; +import com.google.protobuf.ServiceException; +import org.apache.hadoop.hdds.conf.OzoneConfiguration; +import org.apache.hadoop.hdds.utils.BackgroundService; +import org.apache.hadoop.hdds.utils.BackgroundTask; +import org.apache.hadoop.hdds.utils.BackgroundTaskQueue; +import org.apache.hadoop.hdds.utils.BackgroundTaskResult; +import org.apache.hadoop.hdds.utils.db.Table; +import org.apache.hadoop.hdds.utils.db.TableIterator; +import org.apache.hadoop.ozone.ClientVersion; +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.SnapshotChainManager; +import org.apache.hadoop.ozone.om.helpers.OMRatisHelper; +import org.apache.hadoop.ozone.om.helpers.OmBucketInfo; +import org.apache.hadoop.ozone.om.helpers.OmKeyInfo; +import org.apache.hadoop.ozone.om.helpers.RepeatedOmKeyInfo; +import org.apache.hadoop.ozone.om.helpers.SnapshotInfo; +import org.apache.hadoop.ozone.om.ratis.OzoneManagerRatisServer; +import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos.KeyValuePair; +import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos.OMRequest; +import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos.SnapshotMoveDeletedKeysRequest; +import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos.Type; +import org.apache.ratis.protocol.ClientId; +import org.apache.ratis.protocol.Message; +import org.apache.ratis.protocol.RaftClientRequest; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.List; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.concurrent.atomic.AtomicLong; + +import static org.apache.hadoop.ozone.om.OMConfigKeys.SNAPSHOT_DELETING_LIMIT_PER_TASK; +import static org.apache.hadoop.ozone.om.OMConfigKeys.SNAPSHOT_DELETING_LIMIT_PER_TASK_DEFAULT; +import static org.apache.hadoop.ozone.om.OmSnapshotManager.getSnapshotPrefix; + +/** + * Background Service to clean-up deleted snapshot and reclaim space. + */ +public class SnapshotDeletingService extends BackgroundService { + private static final Logger LOG = + LoggerFactory.getLogger(SnapshotDeletingService.class); + + // Use only a single thread for Snapshot Deletion. Multiple threads would read + // from the same table and can send deletion requests for same snapshot + // multiple times. + private static final int SNAPSHOT_DELETING_CORE_POOL_SIZE = 1; + private final ClientId clientId = ClientId.randomId(); + private final AtomicLong runCount; + + private final OzoneManager ozoneManager; + private final OmSnapshotManager omSnapshotManager; + private final SnapshotChainManager chainManager; + private final AtomicBoolean suspended; + private final OzoneConfiguration conf; + private final AtomicLong successRunCount; + private final long snapshotDeletionPerTask; + + public SnapshotDeletingService(long interval, long serviceTimeout, + OzoneManager ozoneManager) throws IOException { + super("SnapshotDeletingService", interval, TimeUnit.MILLISECONDS, + SNAPSHOT_DELETING_CORE_POOL_SIZE, serviceTimeout); + this.ozoneManager = ozoneManager; + this.omSnapshotManager = ozoneManager.getOmSnapshotManager(); + this.chainManager = ozoneManager.getSnapshotChainManager(); + this.runCount = new AtomicLong(0); + this.successRunCount = new AtomicLong(0); + this.suspended = new AtomicBoolean(false); + this.conf = ozoneManager.getConfiguration(); + this.snapshotDeletionPerTask = conf + .getLong(SNAPSHOT_DELETING_LIMIT_PER_TASK, + SNAPSHOT_DELETING_LIMIT_PER_TASK_DEFAULT); + } + + private class SnapshotDeletingTask implements BackgroundTask { + + @Override + public BackgroundTaskResult call() throws Exception { + if (!shouldRun()) { + return BackgroundTaskResult.EmptyTaskResult.newResult(); + } + + runCount.incrementAndGet(); + + Table<String, SnapshotInfo> snapshotInfoTable = + ozoneManager.getMetadataManager().getSnapshotInfoTable(); + try (TableIterator<String, ? extends Table.KeyValue + <String, SnapshotInfo>> iterator = snapshotInfoTable.iterator()) { + iterator.seekToFirst(); + + long snapshotLimit = snapshotDeletionPerTask; + + while (iterator.hasNext() && snapshotLimit > 0) { + SnapshotInfo snapInfo = iterator.next().getValue(); + SnapshotInfo.SnapshotStatus snapshotStatus = + snapInfo.getSnapshotStatus(); + + // Only Iterate in deleted snapshot + if (!snapshotStatus.equals( + SnapshotInfo.SnapshotStatus.SNAPSHOT_DELETED)) { + continue; + } + + OmSnapshot omSnapshot = (OmSnapshot) omSnapshotManager + .checkForSnapshot(snapInfo.getVolumeName(), + snapInfo.getBucketName(), + getSnapshotPrefix(snapInfo.getName())); + + Table<String, RepeatedOmKeyInfo> snapshotDeletedTable = + omSnapshot.getMetadataManager().getDeletedTable(); + + if (snapshotDeletedTable.getEstimatedKeyCount() == 0) { + continue; + } + + // Get bucketInfo for the snapshot bucket to get bucket layout. + String dbBucketKey = ozoneManager.getMetadataManager().getBucketKey( + snapInfo.getVolumeName(), snapInfo.getBucketName()); + OmBucketInfo bucketInfo = ozoneManager.getMetadataManager() + .getBucketTable().get(dbBucketKey); + + + chainManager.loadFromSnapshotInfoTable( + ozoneManager.getMetadataManager()); + SnapshotInfo nextSnapshot = getNextNonDeletedSnapshot(snapInfo); + + SnapshotInfo previousSnapshot = getPreviousSnapshot(snapInfo); + Table<String, OmKeyInfo> previousKeyTable = null; + OmSnapshot omPreviousSnapshot = null; + + // Handle case when the deleted snapshot is the first snapshot. + // Move deleted keys to activeDB's deletedKeyTable + if (previousSnapshot != null) { + omPreviousSnapshot = (OmSnapshot) omSnapshotManager Review Comment: For comparision of keys across snapshot, there is a possibility of volume/bucket removed, or recreated, the objectId is changed. So we can not use volume, and bucket name, and also key name can not be used. Need to use objectId additionally. Please recheck this part for this ... ########## hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/service/SnapshotDeletingService.java: ########## @@ -0,0 +1,378 @@ +/* + * 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.service; + +import com.google.common.annotations.VisibleForTesting; +import com.google.protobuf.ServiceException; +import org.apache.hadoop.hdds.conf.OzoneConfiguration; +import org.apache.hadoop.hdds.utils.BackgroundService; +import org.apache.hadoop.hdds.utils.BackgroundTask; +import org.apache.hadoop.hdds.utils.BackgroundTaskQueue; +import org.apache.hadoop.hdds.utils.BackgroundTaskResult; +import org.apache.hadoop.hdds.utils.db.Table; +import org.apache.hadoop.hdds.utils.db.TableIterator; +import org.apache.hadoop.ozone.ClientVersion; +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.SnapshotChainManager; +import org.apache.hadoop.ozone.om.helpers.OMRatisHelper; +import org.apache.hadoop.ozone.om.helpers.OmBucketInfo; +import org.apache.hadoop.ozone.om.helpers.OmKeyInfo; +import org.apache.hadoop.ozone.om.helpers.RepeatedOmKeyInfo; +import org.apache.hadoop.ozone.om.helpers.SnapshotInfo; +import org.apache.hadoop.ozone.om.ratis.OzoneManagerRatisServer; +import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos.KeyValuePair; +import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos.OMRequest; +import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos.SnapshotMoveDeletedKeysRequest; +import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos.Type; +import org.apache.ratis.protocol.ClientId; +import org.apache.ratis.protocol.Message; +import org.apache.ratis.protocol.RaftClientRequest; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.List; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.concurrent.atomic.AtomicLong; + +import static org.apache.hadoop.ozone.om.OMConfigKeys.SNAPSHOT_DELETING_LIMIT_PER_TASK; +import static org.apache.hadoop.ozone.om.OMConfigKeys.SNAPSHOT_DELETING_LIMIT_PER_TASK_DEFAULT; +import static org.apache.hadoop.ozone.om.OmSnapshotManager.getSnapshotPrefix; + +/** + * Background Service to clean-up deleted snapshot and reclaim space. + */ +public class SnapshotDeletingService extends BackgroundService { + private static final Logger LOG = + LoggerFactory.getLogger(SnapshotDeletingService.class); + + // Use only a single thread for Snapshot Deletion. Multiple threads would read + // from the same table and can send deletion requests for same snapshot + // multiple times. + private static final int SNAPSHOT_DELETING_CORE_POOL_SIZE = 1; + private final ClientId clientId = ClientId.randomId(); + private final AtomicLong runCount; + + private final OzoneManager ozoneManager; + private final OmSnapshotManager omSnapshotManager; + private final SnapshotChainManager chainManager; + private final AtomicBoolean suspended; + private final OzoneConfiguration conf; + private final AtomicLong successRunCount; + private final long snapshotDeletionPerTask; + + public SnapshotDeletingService(long interval, long serviceTimeout, + OzoneManager ozoneManager) throws IOException { + super("SnapshotDeletingService", interval, TimeUnit.MILLISECONDS, + SNAPSHOT_DELETING_CORE_POOL_SIZE, serviceTimeout); + this.ozoneManager = ozoneManager; + this.omSnapshotManager = ozoneManager.getOmSnapshotManager(); + this.chainManager = ozoneManager.getSnapshotChainManager(); + this.runCount = new AtomicLong(0); + this.successRunCount = new AtomicLong(0); + this.suspended = new AtomicBoolean(false); + this.conf = ozoneManager.getConfiguration(); + this.snapshotDeletionPerTask = conf + .getLong(SNAPSHOT_DELETING_LIMIT_PER_TASK, + SNAPSHOT_DELETING_LIMIT_PER_TASK_DEFAULT); + } + + private class SnapshotDeletingTask implements BackgroundTask { + + @Override + public BackgroundTaskResult call() throws Exception { + if (!shouldRun()) { + return BackgroundTaskResult.EmptyTaskResult.newResult(); + } + + runCount.incrementAndGet(); + + Table<String, SnapshotInfo> snapshotInfoTable = + ozoneManager.getMetadataManager().getSnapshotInfoTable(); + try (TableIterator<String, ? extends Table.KeyValue + <String, SnapshotInfo>> iterator = snapshotInfoTable.iterator()) { + iterator.seekToFirst(); + + long snapshotLimit = snapshotDeletionPerTask; + + while (iterator.hasNext() && snapshotLimit > 0) { + SnapshotInfo snapInfo = iterator.next().getValue(); + SnapshotInfo.SnapshotStatus snapshotStatus = + snapInfo.getSnapshotStatus(); + + // Only Iterate in deleted snapshot + if (!snapshotStatus.equals( + SnapshotInfo.SnapshotStatus.SNAPSHOT_DELETED)) { + continue; + } + + OmSnapshot omSnapshot = (OmSnapshot) omSnapshotManager + .checkForSnapshot(snapInfo.getVolumeName(), + snapInfo.getBucketName(), + getSnapshotPrefix(snapInfo.getName())); + + Table<String, RepeatedOmKeyInfo> snapshotDeletedTable = + omSnapshot.getMetadataManager().getDeletedTable(); + + if (snapshotDeletedTable.getEstimatedKeyCount() == 0) { + continue; + } + + // Get bucketInfo for the snapshot bucket to get bucket layout. + String dbBucketKey = ozoneManager.getMetadataManager().getBucketKey( + snapInfo.getVolumeName(), snapInfo.getBucketName()); + OmBucketInfo bucketInfo = ozoneManager.getMetadataManager() Review Comment: If bucket is removed in active db, this might be null in this case. -- This is an automated message from the Apache Git Service. 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