[Backport 2.10] [Backport 2.x] Introducing ZStd compression codec plugin (#9658)

CHANGELOG.md

@@ -117,6 +117,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - [Remote Store] Add support for Remote Translog Store stats in `_remotestore/stats/` API ([#9263](https://github.com/opensearch-project/OpenSearch/pull/9263))
 - Removing the vec file extension from INDEX_STORE_HYBRID_NIO_EXTENSIONS, to ensure the no performance degradation for vector search via Lucene Engine.([#9528](https://github.com/opensearch-project/OpenSearch/pull/9528)))
 - Cleanup Unreferenced file on segment merge failure ([#9503](https://github.com/opensearch-project/OpenSearch/pull/9503))
+- Move ZStd to a plugin ([#9658](https://github.com/opensearch-project/OpenSearch/pull/9658))
 
 ### Deprecated
 

modules/reindex/build.gradle

@@ -69,6 +69,7 @@ dependencies {
   testImplementation project(':modules:transport-netty4')
   // for parent/child testing
   testImplementation project(':modules:parent-join')
+  testImplementation project(':plugins:custom-codecs')
 }
 
 restResources {
@@ -95,4 +96,5 @@ forbiddenPatterns {
 tasks.named("bundlePlugin").configure {
   dependsOn("copyParentJoinMetadata")
   dependsOn("copyTransportNetty4Metadata")
+  dependsOn("copyCustomCodecsMetadata")
 }

modules/reindex/src/internalClusterTest/java/org/opensearch/index/codec/MultiCodecReindexIT.java

@@ -15,14 +15,19 @@
 import org.opensearch.action.support.ActiveShardCount;
 import org.opensearch.cluster.metadata.IndexMetadata;
 import org.opensearch.common.settings.Settings;
+import org.opensearch.index.codec.customcodecs.CustomCodecPlugin;
 import org.opensearch.index.engine.Segment;
 import org.opensearch.index.reindex.BulkByScrollResponse;
 import org.opensearch.index.reindex.ReindexAction;
+import org.opensearch.index.reindex.ReindexPlugin;
 import org.opensearch.index.reindex.ReindexRequestBuilder;
 import org.opensearch.index.reindex.ReindexTestCase;
+import org.opensearch.plugins.Plugin;
 
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collection;
+import java.util.List;
 import java.util.Map;
 import java.util.UUID;
 import java.util.concurrent.ExecutionException;
@@ -40,6 +45,11 @@
 
 public class MultiCodecReindexIT extends ReindexTestCase {
 
+    @Override
+    protected Collection<Class<? extends Plugin>> nodePlugins() {
+        return List.of(CustomCodecPlugin.class, ReindexPlugin.class);
+    }
+
     public void testReindexingMultipleCodecs() throws InterruptedException, ExecutionException {
         internalCluster().ensureAtLeastNumDataNodes(1);
         Map<String, String> codecMap = Map.of(

plugins/custom-codecs/build.gradle

@@ -0,0 +1,27 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ *
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
+apply plugin: 'opensearch.opensearchplugin'
+apply plugin: 'opensearch.internal-cluster-test'
+
+opensearchplugin {
+  name 'custom-codecs'
+  description 'A plugin that implements custom compression codecs.'
+  classname 'org.opensearch.index.codec.customcodecs.CustomCodecPlugin'
+  licenseFile rootProject.file('licenses/APACHE-LICENSE-2.0.txt')
+  noticeFile rootProject.file('NOTICE.txt')
+}
+
+dependencies {
+  api "com.github.luben:zstd-jni:1.5.5-5"
+}
+
+testingConventions.enabled = false;

server/src/internalClusterTest/java/org/opensearch/index/codec/CodecCompressionLevelIT.java → plugins/custom-codecs/src/internalClusterTest/java/org/opensearch/index/codec/CodecCompressionLevelIT.java

@@ -12,14 +12,24 @@
 import org.opensearch.action.admin.indices.settings.put.UpdateSettingsRequest;
 import org.opensearch.cluster.metadata.IndexMetadata;
 import org.opensearch.common.settings.Settings;
+import org.opensearch.index.codec.customcodecs.CustomCodecPlugin;
+import org.opensearch.plugins.Plugin;
 import org.opensearch.test.OpenSearchIntegTestCase;
 
+import java.util.Collection;
+import java.util.Collections;
 import java.util.concurrent.ExecutionException;
 
+import static org.opensearch.index.codec.customcodecs.CustomCodecService.ZSTD_CODEC;
+import static org.opensearch.index.codec.customcodecs.CustomCodecService.ZSTD_NO_DICT_CODEC;
 import static org.opensearch.test.hamcrest.OpenSearchAssertions.assertAcked;
 
 @OpenSearchIntegTestCase.ClusterScope(scope = OpenSearchIntegTestCase.Scope.TEST)
 public class CodecCompressionLevelIT extends OpenSearchIntegTestCase {
+    @Override
+    protected Collection<Class<? extends Plugin>> nodePlugins() {
+        return Collections.singletonList(CustomCodecPlugin.class);
+    }
 
     public void testLuceneCodecsCreateIndexWithCompressionLevel() {
 
@@ -62,7 +72,7 @@ public void testZStandardCodecsCreateIndexWithCompressionLevel() {
             Settings.builder()
                 .put(IndexMetadata.SETTING_NUMBER_OF_SHARDS, 1)
                 .put(IndexMetadata.SETTING_NUMBER_OF_REPLICAS, 0)
-                .put("index.codec", randomFrom(CodecService.ZSTD_CODEC, CodecService.ZSTD_NO_DICT_CODEC))
+                .put("index.codec", randomFrom(ZSTD_CODEC, ZSTD_NO_DICT_CODEC))
                 .put("index.codec.compression_level", randomIntBetween(1, 6))
                 .build()
         );
@@ -81,7 +91,7 @@ public void testZStandardToLuceneCodecsWithCompressionLevel() throws ExecutionEx
             Settings.builder()
                 .put(IndexMetadata.SETTING_NUMBER_OF_SHARDS, 1)
                 .put(IndexMetadata.SETTING_NUMBER_OF_REPLICAS, 0)
-                .put("index.codec", randomFrom(CodecService.ZSTD_CODEC, CodecService.ZSTD_NO_DICT_CODEC))
+                .put("index.codec", randomFrom(ZSTD_CODEC, ZSTD_NO_DICT_CODEC))
                 .put("index.codec.compression_level", randomIntBetween(1, 6))
                 .build()
         );
@@ -164,7 +174,7 @@ public void testLuceneToZStandardCodecsWithCompressionLevel() throws ExecutionEx
                 .updateSettings(
                     new UpdateSettingsRequest(index).settings(
                         Settings.builder()
-                            .put("index.codec", randomFrom(CodecService.ZSTD_CODEC, CodecService.ZSTD_NO_DICT_CODEC))
+                            .put("index.codec", randomFrom(ZSTD_CODEC, ZSTD_NO_DICT_CODEC))
                             .put("index.codec.compression_level", randomIntBetween(1, 6))
                     )
                 )

server/src/internalClusterTest/java/org/opensearch/index/codec/MultiCodecMergeIT.java → plugins/custom-codecs/src/internalClusterTest/java/org/opensearch/index/codec/MultiCodecMergeIT.java

@@ -15,11 +15,15 @@
 import org.opensearch.action.admin.indices.settings.put.UpdateSettingsRequest;
 import org.opensearch.cluster.metadata.IndexMetadata;
 import org.opensearch.common.settings.Settings;
+import org.opensearch.index.codec.customcodecs.CustomCodecPlugin;
 import org.opensearch.index.engine.Segment;
+import org.opensearch.plugins.Plugin;
 import org.opensearch.test.OpenSearchIntegTestCase;
 
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.UUID;
@@ -40,6 +44,11 @@
 @OpenSearchIntegTestCase.ClusterScope(scope = OpenSearchIntegTestCase.Scope.TEST)
 public class MultiCodecMergeIT extends OpenSearchIntegTestCase {
 
+    @Override
+    protected Collection<Class<? extends Plugin>> nodePlugins() {
+        return Collections.singletonList(CustomCodecPlugin.class);
+    }
+
     public void testForceMergeMultipleCodecs() throws ExecutionException, InterruptedException {
 
         Map<String, String> codecMap = Map.of(

plugins/custom-codecs/src/main/java/org/opensearch/index/codec/customcodecs/CustomCodecPlugin.java

@@ -0,0 +1,47 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.index.codec.customcodecs;
+
+import org.opensearch.index.IndexSettings;
+import org.opensearch.index.codec.CodecServiceFactory;
+import org.opensearch.index.engine.EngineConfig;
+import org.opensearch.plugins.EnginePlugin;
+import org.opensearch.plugins.Plugin;
+
+import java.util.Optional;
+
+/**
+ * A plugin that implements custom codecs. Supports these codecs:
+ * <ul>
+ * <li>ZSTD
+ * <li>ZSTDNODICT
+ * </ul>
+ *
+ * @opensearch.internal
+ */
+public final class CustomCodecPlugin extends Plugin implements EnginePlugin {
+
+    /**
+     * Creates a new instance
+     */
+    public CustomCodecPlugin() {}
+
+    /**
+     * @param indexSettings is the default indexSettings
+     * @return the engine factory
+     */
+    @Override
+    public Optional<CodecServiceFactory> getCustomCodecServiceFactory(final IndexSettings indexSettings) {
+        String codecName = indexSettings.getValue(EngineConfig.INDEX_CODEC_SETTING);
+        if (codecName.equals(CustomCodecService.ZSTD_NO_DICT_CODEC) || codecName.equals(CustomCodecService.ZSTD_CODEC)) {
+            return Optional.of(new CustomCodecServiceFactory());
+        }
+        return Optional.empty();
+    }
+}

plugins/custom-codecs/src/main/java/org/opensearch/index/codec/customcodecs/CustomCodecService.java

@@ -0,0 +1,72 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.index.codec.customcodecs;
+
+import org.apache.logging.log4j.Logger;
+import org.apache.lucene.codecs.Codec;
+import org.opensearch.common.collect.MapBuilder;
+import org.opensearch.index.IndexSettings;
+import org.opensearch.index.codec.CodecService;
+import org.opensearch.index.mapper.MapperService;
+
+import java.util.Arrays;
+import java.util.Map;
+import java.util.stream.Stream;
+
+import static org.opensearch.index.engine.EngineConfig.INDEX_CODEC_COMPRESSION_LEVEL_SETTING;
+
+/**
+ * CustomCodecService provides ZSTD and ZSTD_NO_DICT compression codecs.
+ */
+public class CustomCodecService extends CodecService {
+    private final Map<String, Codec> codecs;
+    /**
+     * ZStandard codec
+     */
+    public static final String ZSTD_CODEC = "zstd";
+    /**
+     * ZStandard without dictionary codec
+     */
+    public static final String ZSTD_NO_DICT_CODEC = "zstd_no_dict";
+
+    /**
+     * Creates a new CustomCodecService.
+     *
+     * @param mapperService The mapper service.
+     * @param indexSettings The index settings.
+     * @param logger        The logger.
+     */
+    public CustomCodecService(MapperService mapperService, IndexSettings indexSettings, Logger logger) {
+        super(mapperService, indexSettings, logger);
+        int compressionLevel = indexSettings.getValue(INDEX_CODEC_COMPRESSION_LEVEL_SETTING);
+        final MapBuilder<String, Codec> codecs = MapBuilder.<String, Codec>newMapBuilder();
+        if (mapperService == null) {
+            codecs.put(ZSTD_CODEC, new ZstdCodec(compressionLevel));
+            codecs.put(ZSTD_NO_DICT_CODEC, new ZstdNoDictCodec(compressionLevel));
+        } else {
+            codecs.put(ZSTD_CODEC, new ZstdCodec(mapperService, logger, compressionLevel));
+            codecs.put(ZSTD_NO_DICT_CODEC, new ZstdNoDictCodec(mapperService, logger, compressionLevel));
+        }
+        this.codecs = codecs.immutableMap();
+    }
+
+    @Override
+    public Codec codec(String name) {
+        Codec codec = codecs.get(name);
+        if (codec == null) {
+            return super.codec(name);
+        }
+        return codec;
+    }
+
+    @Override
+    public String[] availableCodecs() {
+        return Stream.concat(Arrays.stream(super.availableCodecs()), codecs.keySet().stream()).toArray(String[]::new);
+    }
+}

plugins/custom-codecs/src/main/java/org/opensearch/index/codec/customcodecs/CustomCodecServiceFactory.java

@@ -0,0 +1,27 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.index.codec.customcodecs;
+
+import org.opensearch.index.codec.CodecService;
+import org.opensearch.index.codec.CodecServiceConfig;
+import org.opensearch.index.codec.CodecServiceFactory;
+
+/**
+ * A factory for creating new {@link CodecService} instance
+ */
+public class CustomCodecServiceFactory implements CodecServiceFactory {
+
+    /** Creates a new instance. */
+    public CustomCodecServiceFactory() {}
+
+    @Override
+    public CodecService createCodecService(CodecServiceConfig config) {
+        return new CustomCodecService(config.getMapperService(), config.getIndexSettings(), config.getLogger());
+    }
+}

server/src/main/java/org/opensearch/index/codec/customcodecs/Lucene95CustomCodec.java → plugins/custom-codecs/src/main/java/org/opensearch/index/codec/customcodecs/Lucene95CustomCodec.java

@@ -15,6 +15,9 @@
 import org.opensearch.index.codec.PerFieldMappingPostingFormatCodec;
 import org.opensearch.index.mapper.MapperService;
 
+import java.util.Collections;
+import java.util.Set;
+
 /**
  *
  * Extends {@link FilterCodec} to reuse the functionality of Lucene Codec.
@@ -23,12 +26,48 @@
  * @opensearch.internal
  */
 public abstract class Lucene95CustomCodec extends FilterCodec {
+
+    /** Default compression level used for compression */
     public static final int DEFAULT_COMPRESSION_LEVEL = 3;
 
     /** Each mode represents a compression algorithm. */
     public enum Mode {
-        ZSTD,
-        ZSTD_NO_DICT
+        /**
+         * ZStandard mode with dictionary
+         */
+        ZSTD("ZSTD", Set.of("zstd")),
+        /**
+         * ZStandard mode without dictionary
+         */
+        ZSTD_NO_DICT("ZSTDNODICT", Set.of("zstd_no_dict")),
+        /**
+         * Deprecated ZStandard mode, added for backward compatibility to support indices created in 2.9.0 where
+         * both ZSTD and ZSTD_NO_DICT used Lucene95CustomCodec underneath. This should not be used to
+         * create new indices.
+         */
+        ZSTD_DEPRECATED("Lucene95CustomCodec", Collections.emptySet());
+
+        private final String codec;
+        private final Set<String> aliases;
+
+        Mode(String codec, Set<String> aliases) {
+            this.codec = codec;
+            this.aliases = aliases;
+        }
+
+        /**
+         * Returns the Codec that is registered with Lucene
+         */
+        public String getCodec() {
+            return codec;
+        }
+
+        /**
+         * Returns the aliases of the Codec
+         */
+        public Set<String> getAliases() {
+            return aliases;
+        }
     }
 
     private final StoredFieldsFormat storedFieldsFormat;
@@ -51,12 +90,22 @@ public Lucene95CustomCodec(Mode mode) {
      * @param compressionLevel The compression level.
      */
     public Lucene95CustomCodec(Mode mode, int compressionLevel) {
-        super("Lucene95CustomCodec", new Lucene95Codec());
+        super(mode.getCodec(), new Lucene95Codec());
         this.storedFieldsFormat = new Lucene95CustomStoredFieldsFormat(mode, compressionLevel);
     }
 
+    /**
+     * Creates a new compression codec with the given compression level. We use
+     * lowercase letters when registering the codec so that we remain consistent with
+     * the other compression codecs: default, lucene_default, and best_compression.
+     *
+     * @param mode The compression codec (ZSTD or ZSTDNODICT).
+     * @param compressionLevel The compression level.
+     * @param mapperService The mapper service.
+     * @param logger The logger.
+     */
     public Lucene95CustomCodec(Mode mode, int compressionLevel, MapperService mapperService, Logger logger) {
-        super("Lucene95CustomCodec", new PerFieldMappingPostingFormatCodec(Lucene95Codec.Mode.BEST_SPEED, mapperService, logger));
+        super(mode.getCodec(), new PerFieldMappingPostingFormatCodec(Lucene95Codec.Mode.BEST_SPEED, mapperService, logger));
         this.storedFieldsFormat = new Lucene95CustomStoredFieldsFormat(mode, compressionLevel);
     }