HDDS-12819. Auto-compact tables which can tend to be large in size at intervals #8260
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| Original file line number | Diff line number | Diff line change |
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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. | ||
| */ | ||
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| package org.apache.hadoop.ozone.om.service; | ||
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| import com.google.common.annotations.VisibleForTesting; | ||
| import java.io.IOException; | ||
| import java.util.ArrayList; | ||
| import java.util.Collections; | ||
| import java.util.HashSet; | ||
| import java.util.List; | ||
| import java.util.Set; | ||
| import java.util.concurrent.TimeUnit; | ||
| import java.util.concurrent.atomic.AtomicBoolean; | ||
| import java.util.concurrent.atomic.AtomicLong; | ||
| 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.RDBStore; | ||
| import org.apache.hadoop.hdds.utils.db.RocksDatabase; | ||
| import org.apache.hadoop.hdds.utils.db.managed.ManagedCompactRangeOptions; | ||
| import org.apache.hadoop.ozone.om.OMMetadataManager; | ||
| import org.apache.hadoop.ozone.om.OzoneManager; | ||
| import org.apache.hadoop.util.Time; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| /** | ||
| * This is the background service to compact OM rocksdb tables. | ||
| */ | ||
| public class CompactionService extends BackgroundService { | ||
| private static final Logger LOG = | ||
| LoggerFactory.getLogger(CompactionService.class); | ||
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| // Use only a single thread for Compaction. | ||
| private static final int COMPACTOR_THREAD_POOL_SIZE = 1; | ||
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| private final OzoneManager ozoneManager; | ||
| private final OMMetadataManager omMetadataManager; | ||
| private final AtomicLong numCompactions; | ||
| private final AtomicBoolean suspended; | ||
| // list of tables that can be compacted | ||
| private final List<String> compactableTables; | ||
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| public CompactionService(OzoneManager ozoneManager, TimeUnit unit, long interval, long timeout, | ||
| List<String> tables) { | ||
| super("CompactionService", interval, unit, | ||
| COMPACTOR_THREAD_POOL_SIZE, timeout, | ||
| ozoneManager.getThreadNamePrefix()); | ||
| this.ozoneManager = ozoneManager; | ||
| this.omMetadataManager = this.ozoneManager.getMetadataManager(); | ||
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| this.numCompactions = new AtomicLong(0); | ||
| this.suspended = new AtomicBoolean(false); | ||
| this.compactableTables = validateTables(tables); | ||
| } | ||
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| private List<String> validateTables(List<String> tables) { | ||
| if (tables == null || tables.isEmpty()) { | ||
| return Collections.emptyList(); | ||
| } | ||
| List<String> validTables = new ArrayList<>(); | ||
| Set<String> allTableNames = new HashSet<>(omMetadataManager.listTableNames()); | ||
| for (String table : tables) { | ||
| if (allTableNames.contains(table)) { | ||
| validTables.add(table); | ||
| } else { | ||
| LOG.warn("CompactionService: Table \"{}\" not found in OM metadata. Skipping this table.", table); | ||
| } | ||
| } | ||
| if (validTables.isEmpty()) { | ||
| LOG.error("CompactionService: No valid compaction tables found. Failing initialization."); | ||
| throw new IllegalArgumentException("CompactionService: None of the provided tables are valid."); | ||
| } | ||
| return Collections.unmodifiableList(validTables); | ||
| } | ||
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| /** | ||
| * Suspend the service (for testing). | ||
| */ | ||
| @VisibleForTesting | ||
| public void suspend() { | ||
| suspended.set(true); | ||
| } | ||
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| /** | ||
| * Resume the service if suspended (for testing). | ||
| */ | ||
| @VisibleForTesting | ||
| public void resume() { | ||
| suspended.set(false); | ||
| } | ||
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| @VisibleForTesting | ||
| public List<String> getCompactableTables() { | ||
| return compactableTables; | ||
| } | ||
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| /** | ||
| * Returns the number of manual compactions performed. | ||
| * | ||
| * @return long count. | ||
| */ | ||
| @VisibleForTesting | ||
| public long getNumCompactions() { | ||
| return numCompactions.get(); | ||
| } | ||
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| @Override | ||
| public synchronized BackgroundTaskQueue getTasks() { | ||
| BackgroundTaskQueue queue = new BackgroundTaskQueue(); | ||
| for (String tableName : compactableTables) { | ||
| queue.add(new CompactTask(tableName)); | ||
| } | ||
| return queue; | ||
| } | ||
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| private boolean shouldRun() { | ||
| return !suspended.get(); | ||
| } | ||
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| protected void compactFully(String tableName) throws IOException { | ||
| long startTime = Time.monotonicNow(); | ||
| LOG.info("Compacting column family: {}", tableName); | ||
| try (ManagedCompactRangeOptions options = new ManagedCompactRangeOptions()) { | ||
| options.setBottommostLevelCompaction(ManagedCompactRangeOptions.BottommostLevelCompaction.kForce); | ||
| options.setExclusiveManualCompaction(true); | ||
| RocksDatabase rocksDatabase = ((RDBStore) omMetadataManager.getStore()).getDb(); | ||
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| try { | ||
| // Find CF Handler | ||
| RocksDatabase.ColumnFamily columnFamily = rocksDatabase.getColumnFamily(tableName); | ||
| rocksDatabase.compactRange(columnFamily, null, null, options); | ||
jojochuang marked this conversation as resolved.
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| LOG.info("Compaction of column family: {} completed in {} ms", | ||
| tableName, Time.monotonicNow() - startTime); | ||
| } catch (NullPointerException ex) { | ||
|
Contributor
There was a problem hiding this comment. We should check null instead of catching BTW, the commit message somehow used HDDS-12518 instead of HDDS-12819. |
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| LOG.error("Unable to trigger compaction for \"{}\". Column family not found ", tableName); | ||
| throw new IOException("Column family \"" + tableName + "\" not found."); | ||
| } | ||
| } | ||
| } | ||
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| private class CompactTask implements BackgroundTask { | ||
| private final String tableName; | ||
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| CompactTask(String tableName) { | ||
| this.tableName = tableName; | ||
| } | ||
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| @Override | ||
| public int getPriority() { | ||
| return 0; | ||
| } | ||
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| @Override | ||
| public BackgroundTaskResult call() throws Exception { | ||
| // trigger full compaction for the specified table. | ||
| if (!shouldRun()) { | ||
| return BackgroundTaskResult.EmptyTaskResult.newResult(); | ||
| } | ||
| LOG.debug("Running CompactTask"); | ||
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| compactFully(tableName); | ||
| numCompactions.incrementAndGet(); | ||
| return () -> 1; | ||
| } | ||
| } | ||
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| } | ||
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@Tejaskriya
Noticed that there is a typo here.
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Although it is consistent with what the config is named in ozone-default.xml, I will correct it in a followup jira. Thanks for catching this!
@jojochuang I am not sure if someone using this version of the patch would face any issues. Do you happen to know if not following the config naming convention would cause any breakage?
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HDDS-13525 fixes this