[Backport 2.x] [Star tree] Star tree index validations (#15533) (#15610)

---------

Signed-off-by: Bharathwaj G <bharath78910@gmail.com>

server/src/main/java/org/opensearch/cluster/metadata/MetadataCreateIndexService.java

@@ -82,14 +82,17 @@
 import org.opensearch.common.xcontent.XContentHelper;
 import org.opensearch.core.action.ActionListener;
 import org.opensearch.core.common.Strings;
+import org.opensearch.core.common.unit.ByteSizeValue;
 import org.opensearch.core.index.Index;
 import org.opensearch.core.xcontent.NamedXContentRegistry;
 import org.opensearch.env.Environment;
 import org.opensearch.index.IndexModule;
 import org.opensearch.index.IndexNotFoundException;
 import org.opensearch.index.IndexService;
 import org.opensearch.index.IndexSettings;
+import org.opensearch.index.compositeindex.CompositeIndexSettings;
 import org.opensearch.index.compositeindex.CompositeIndexValidator;
+import org.opensearch.index.compositeindex.datacube.startree.StarTreeIndexSettings;
 import org.opensearch.index.mapper.DocumentMapper;
 import org.opensearch.index.mapper.MapperService;
 import org.opensearch.index.mapper.MapperService.MergeReason;
@@ -154,6 +157,7 @@
 import static org.opensearch.cluster.metadata.Metadata.DEFAULT_REPLICA_COUNT_SETTING;
 import static org.opensearch.cluster.metadata.MetadataIndexTemplateService.findContextTemplateName;
 import static org.opensearch.index.IndexModule.INDEX_STORE_TYPE_SETTING;
+import static org.opensearch.index.IndexSettings.INDEX_TRANSLOG_FLUSH_THRESHOLD_SIZE_SETTING;
 import static org.opensearch.indices.IndicesService.CLUSTER_REPLICATION_TYPE_SETTING;
 import static org.opensearch.node.remotestore.RemoteStoreNodeAttribute.isRemoteDataAttributePresent;
 import static org.opensearch.node.remotestore.RemoteStoreNodeService.REMOTE_STORE_COMPATIBILITY_MODE_SETTING;
@@ -1079,6 +1083,7 @@ static Settings aggregateIndexSettings(
         validateTranslogRetentionSettings(indexSettings);
         validateStoreTypeSettings(indexSettings);
         validateRefreshIntervalSettings(request.settings(), clusterSettings);
+        validateTranslogFlushIntervalSettingsForCompositeIndex(request.settings(), clusterSettings);
         validateTranslogDurabilitySettings(request.settings(), clusterSettings, settings);
         return indexSettings;
     }
@@ -1766,6 +1771,71 @@ public static void validateTranslogRetentionSettings(Settings indexSettings) {
         }
     }
 
+    /**
+     * Validates {@code index.translog.flush_threshold_size} is equal or below the {@code indices.composite_index.translog.max_flush_threshold_size}
+     * for composite indices based on {{@code index.composite_index}}
+     *
+     * @param requestSettings settings passed in during index create/update request
+     * @param clusterSettings cluster setting
+     */
+    public static void validateTranslogFlushIntervalSettingsForCompositeIndex(Settings requestSettings, ClusterSettings clusterSettings) {
+        if (StarTreeIndexSettings.IS_COMPOSITE_INDEX_SETTING.exists(requestSettings) == false
+            || requestSettings.get(StarTreeIndexSettings.IS_COMPOSITE_INDEX_SETTING.getKey()) == null) {
+            return;
+        }
+        ByteSizeValue translogFlushSize = INDEX_TRANSLOG_FLUSH_THRESHOLD_SIZE_SETTING.get(requestSettings);
+        ByteSizeValue compositeIndexMaxFlushSize = clusterSettings.get(
+            CompositeIndexSettings.COMPOSITE_INDEX_MAX_TRANSLOG_FLUSH_THRESHOLD_SIZE_SETTING
+        );
+        if (translogFlushSize.compareTo(compositeIndexMaxFlushSize) > 0) {
+            throw new IllegalArgumentException(
+                String.format(
+                    Locale.ROOT,
+                    "You can configure '%s' with upto '%s' for composite index",
+                    INDEX_TRANSLOG_FLUSH_THRESHOLD_SIZE_SETTING.getKey(),
+                    compositeIndexMaxFlushSize
+                )
+            );
+        }
+    }
+
+    /**
+     * Validates {@code index.translog.flush_threshold_size} is equal or below the {@code indices.composite_index.translog.max_flush_threshold_size}
+     * for composite indices based on {{@code index.composite_index}}
+     * This is used during update index settings flow
+     *
+     * @param requestSettings settings passed in during index update request
+     * @param clusterSettings cluster setting
+     * @param indexSettings index settings
+     */
+    public static Optional<String> validateTranslogFlushIntervalSettingsForCompositeIndex(
+        Settings requestSettings,
+        ClusterSettings clusterSettings,
+        Settings indexSettings
+    ) {
+        if (INDEX_TRANSLOG_FLUSH_THRESHOLD_SIZE_SETTING.exists(requestSettings) == false
+            || requestSettings.get(INDEX_TRANSLOG_FLUSH_THRESHOLD_SIZE_SETTING.getKey()) == null
+            || StarTreeIndexSettings.IS_COMPOSITE_INDEX_SETTING.exists(indexSettings) == false
+            || indexSettings.get(StarTreeIndexSettings.IS_COMPOSITE_INDEX_SETTING.getKey()) == null) {
+            return Optional.empty();
+        }
+        ByteSizeValue translogFlushSize = INDEX_TRANSLOG_FLUSH_THRESHOLD_SIZE_SETTING.get(requestSettings);
+        ByteSizeValue compositeIndexMaxFlushSize = clusterSettings.get(
+            CompositeIndexSettings.COMPOSITE_INDEX_MAX_TRANSLOG_FLUSH_THRESHOLD_SIZE_SETTING
+        );
+        if (translogFlushSize.compareTo(compositeIndexMaxFlushSize) > 0) {
+            return Optional.of(
+                String.format(
+                    Locale.ROOT,
+                    "You can configure '%s' with upto '%s' for composite index",
+                    INDEX_TRANSLOG_FLUSH_THRESHOLD_SIZE_SETTING.getKey(),
+                    compositeIndexMaxFlushSize
+                )
+            );
+        }
+        return Optional.empty();
+    }
+
     /**
      * Validates {@code index.refresh_interval} is equal or below the {@code cluster.minimum.index.refresh_interval}.
      *

server/src/main/java/org/opensearch/cluster/metadata/MetadataIndexTemplateService.java

@@ -102,6 +102,7 @@
 
 import static org.opensearch.cluster.metadata.MetadataCreateDataStreamService.validateTimestampFieldMapping;
 import static org.opensearch.cluster.metadata.MetadataCreateIndexService.validateRefreshIntervalSettings;
+import static org.opensearch.cluster.metadata.MetadataCreateIndexService.validateTranslogFlushIntervalSettingsForCompositeIndex;
 import static org.opensearch.common.util.concurrent.ThreadContext.ACTION_ORIGIN_TRANSIENT_NAME;
 import static org.opensearch.indices.cluster.IndicesClusterStateService.AllocatedIndices.IndexRemovalReason.NO_LONGER_ASSIGNED;
 
@@ -1639,6 +1640,7 @@ private void validate(String name, @Nullable Settings settings, List<String> ind
 
             // validate index refresh interval and translog durability settings
             validateRefreshIntervalSettings(settings, clusterService.getClusterSettings());
+            validateTranslogFlushIntervalSettingsForCompositeIndex(settings, clusterService.getClusterSettings());
             validateTranslogDurabilitySettingsInTemplate(settings, clusterService.getClusterSettings());
         }
 

server/src/main/java/org/opensearch/cluster/metadata/MetadataUpdateSettingsService.java

@@ -82,6 +82,7 @@
 import static org.opensearch.cluster.metadata.MetadataCreateIndexService.validateOverlap;
 import static org.opensearch.cluster.metadata.MetadataCreateIndexService.validateRefreshIntervalSettings;
 import static org.opensearch.cluster.metadata.MetadataCreateIndexService.validateTranslogDurabilitySettings;
+import static org.opensearch.cluster.metadata.MetadataCreateIndexService.validateTranslogFlushIntervalSettingsForCompositeIndex;
 import static org.opensearch.cluster.metadata.MetadataIndexTemplateService.findComponentTemplate;
 import static org.opensearch.common.settings.AbstractScopedSettings.ARCHIVED_SETTINGS_PREFIX;
 import static org.opensearch.index.IndexSettings.same;
@@ -221,6 +222,12 @@ public ClusterState execute(ClusterState currentState) {
                                 index.getName()
                             ).ifPresent(validationErrors::add);
                         }
+                        validateTranslogFlushIntervalSettingsForCompositeIndex(
+                            normalizedSettings,
+                            clusterService.getClusterSettings(),
+                            metadata.getSettings()
+                        ).ifPresent(validationErrors::add);
+
                     }
 
                     if (validationErrors.size() > 0) {

server/src/main/java/org/opensearch/common/settings/ClusterSettings.java

@@ -770,6 +770,10 @@ public void apply(Settings value, Settings current, Settings previous) {
                 RemoteStoreSettings.CLUSTER_REMOTE_STORE_PINNED_TIMESTAMP_LOOKBACK_INTERVAL,
                 RemoteStoreSettings.CLUSTER_REMOTE_STORE_PINNED_TIMESTAMP_ENABLED,
 
+                // Composite index settings
+                CompositeIndexSettings.STAR_TREE_INDEX_ENABLED_SETTING,
+                CompositeIndexSettings.COMPOSITE_INDEX_MAX_TRANSLOG_FLUSH_THRESHOLD_SIZE_SETTING,
+
                 SystemTemplatesService.SETTING_APPLICATION_BASED_CONFIGURATION_TEMPLATES_ENABLED,
 
                 // WorkloadManagement settings

server/src/main/java/org/opensearch/common/settings/IndexScopedSettings.java

@@ -250,6 +250,8 @@ public final class IndexScopedSettings extends AbstractScopedSettings {
                 StarTreeIndexSettings.DEFAULT_METRICS_LIST,
                 StarTreeIndexSettings.DEFAULT_DATE_INTERVALS,
                 StarTreeIndexSettings.STAR_TREE_MAX_DATE_INTERVALS_SETTING,
+                StarTreeIndexSettings.STAR_TREE_MAX_BASE_METRICS_SETTING,
+                StarTreeIndexSettings.IS_COMPOSITE_INDEX_SETTING,
 
                 IndexSettings.INDEX_CONTEXT_CREATED_VERSION,
                 IndexSettings.INDEX_CONTEXT_CURRENT_VERSION,

server/src/main/java/org/opensearch/index/IndexSettings.java

@@ -49,6 +49,7 @@
 import org.opensearch.core.common.unit.ByteSizeUnit;
 import org.opensearch.core.common.unit.ByteSizeValue;
 import org.opensearch.core.index.Index;
+import org.opensearch.index.compositeindex.datacube.startree.StarTreeIndexSettings;
 import org.opensearch.index.remote.RemoteStorePathStrategy;
 import org.opensearch.index.remote.RemoteStoreUtils;
 import org.opensearch.index.translog.Translog;
@@ -902,6 +903,8 @@ private void setRetentionLeaseMillis(final TimeValue retentionLease) {
      */
     private volatile double docIdFuzzySetFalsePositiveProbability;
 
+    private final boolean isCompositeIndex;
+
     /**
      * Returns the default search fields for this index.
      */
@@ -1064,7 +1067,7 @@ public IndexSettings(final IndexMetadata indexMetadata, final Settings nodeSetti
 
         setEnableFuzzySetForDocId(scopedSettings.get(INDEX_DOC_ID_FUZZY_SET_ENABLED_SETTING));
         setDocIdFuzzySetFalsePositiveProbability(scopedSettings.get(INDEX_DOC_ID_FUZZY_SET_FALSE_POSITIVE_PROBABILITY_SETTING));
-
+        isCompositeIndex = scopedSettings.get(StarTreeIndexSettings.IS_COMPOSITE_INDEX_SETTING);
         scopedSettings.addSettingsUpdateConsumer(
             TieredMergePolicyProvider.INDEX_COMPOUND_FORMAT_SETTING,
             tieredMergePolicyProvider::setNoCFSRatio
@@ -1309,6 +1312,10 @@ public int getNumberOfReplicas() {
         return settings.getAsInt(IndexMetadata.SETTING_NUMBER_OF_REPLICAS, null);
     }
 
+    public boolean isCompositeIndex() {
+        return isCompositeIndex;
+    }
+
     /**
      * Returns true if segment replication is enabled on the index.
      *

server/src/main/java/org/opensearch/index/compositeindex/CompositeIndexSettings.java

@@ -13,6 +13,8 @@
 import org.opensearch.common.settings.Setting;
 import org.opensearch.common.settings.Settings;
 import org.opensearch.common.util.FeatureFlags;
+import org.opensearch.core.common.unit.ByteSizeUnit;
+import org.opensearch.core.common.unit.ByteSizeValue;
 
 /**
  * Cluster level settings for composite indices
@@ -37,12 +39,23 @@ public class CompositeIndexSettings {
         Setting.Property.Dynamic
     );
 
+    /**
+     * This sets the max flush threshold size for composite index
+     */
+    public static final Setting<ByteSizeValue> COMPOSITE_INDEX_MAX_TRANSLOG_FLUSH_THRESHOLD_SIZE_SETTING = Setting.byteSizeSetting(
+        "indices.composite_index.translog.max_flush_threshold_size",
+        new ByteSizeValue(512, ByteSizeUnit.MB),
+        new ByteSizeValue(128, ByteSizeUnit.MB),
+        new ByteSizeValue(Long.MAX_VALUE, ByteSizeUnit.BYTES),
+        Setting.Property.NodeScope,
+        Setting.Property.Dynamic
+    );
+
     private volatile boolean starTreeIndexCreationEnabled;
 
     public CompositeIndexSettings(Settings settings, ClusterSettings clusterSettings) {
         this.starTreeIndexCreationEnabled = STAR_TREE_INDEX_ENABLED_SETTING.get(settings);
         clusterSettings.addSettingsUpdateConsumer(STAR_TREE_INDEX_ENABLED_SETTING, this::starTreeIndexCreationEnabled);
-
     }
 
     private void starTreeIndexCreationEnabled(boolean value) {

server/src/main/java/org/opensearch/index/compositeindex/datacube/startree/StarTreeIndexSettings.java

@@ -26,6 +26,7 @@
 public class StarTreeIndexSettings {
 
     public static int STAR_TREE_MAX_DIMENSIONS_DEFAULT = 10;
+    public static int STAR_TREE_MAX_BASE_METRICS_DEFAULT = 100;
     /**
      * This setting determines the max number of star tree fields that can be part of composite index mapping. For each
      * star tree field, we will generate associated star tree index.
@@ -52,6 +53,19 @@ public class StarTreeIndexSettings {
         Setting.Property.Final
     );
 
+    /**
+     * This setting determines the max number of dimensions that can be part of star tree index field. Number of
+     * dimensions and associated cardinality has direct effect of star tree index size and query performance.
+     */
+    public static final Setting<Integer> STAR_TREE_MAX_BASE_METRICS_SETTING = Setting.intSetting(
+        "index.composite_index.star_tree.field.max_base_metrics",
+        STAR_TREE_MAX_BASE_METRICS_DEFAULT,
+        4,
+        100,
+        Setting.Property.IndexScope,
+        Setting.Property.Final
+    );
+
     /**
      * This setting determines the max number of date intervals that can be part of star tree date field.
      */
@@ -108,4 +122,11 @@ public static Rounding.DateTimeUnit getTimeUnit(String expression) {
         }
         return DateHistogramAggregationBuilder.DATE_FIELD_UNITS.get(expression);
     }
+
+    public static final Setting<Boolean> IS_COMPOSITE_INDEX_SETTING = Setting.boolSetting(
+        "index.composite_index",
+        false,
+        Setting.Property.IndexScope,
+        Setting.Property.Final
+    );
 }

server/src/main/java/org/opensearch/index/mapper/DocumentParser.java

@@ -661,6 +661,17 @@ private static void parseNonDynamicArray(ParseContext context, ObjectMapper mapp
         throws IOException {
         XContentParser parser = context.parser();
         XContentParser.Token token;
+        // block array values for composite index fields
+        if (context.indexSettings().isCompositeIndex() && context.mapperService().isFieldPartOfCompositeIndex(arrayFieldName)) {
+            throw new MapperParsingException(
+                String.format(
+                    Locale.ROOT,
+                    "object mapping for [%s] with array for [%s] cannot be accepted as field is also part of composite index mapping which does not accept arrays",
+                    mapper.name(),
+                    arrayFieldName
+                )
+            );
+        }
         final String[] paths = splitAndValidatePath(lastFieldName);
         while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
             if (token == XContentParser.Token.START_OBJECT) {

server/src/main/java/org/opensearch/index/mapper/MapperService.java

@@ -228,6 +228,7 @@ public enum MergeReason {
     private final BooleanSupplier idFieldDataEnabled;
 
     private volatile Set<CompositeMappedFieldType> compositeMappedFieldTypes;
+    private volatile Set<String> fieldsPartOfCompositeMappings;
 
     public MapperService(
         IndexSettings indexSettings,
@@ -543,9 +544,18 @@ private synchronized Map<String, DocumentMapper> internalMerge(DocumentMapper ma
 
         // initialize composite fields post merge
         this.compositeMappedFieldTypes = getCompositeFieldTypesFromMapper();
+        buildCompositeFieldLookup();
         return results;
     }
 
+    private void buildCompositeFieldLookup() {
+        Set<String> fieldsPartOfCompositeMappings = new HashSet<>();
+        for (CompositeMappedFieldType fieldType : compositeMappedFieldTypes) {
+            fieldsPartOfCompositeMappings.addAll(fieldType.fields());
+        }
+        this.fieldsPartOfCompositeMappings = fieldsPartOfCompositeMappings;
+    }
+
     private boolean assertSerialization(DocumentMapper mapper) {
         // capture the source now, it may change due to concurrent parsing
         final CompressedXContent mappingSource = mapper.mappingSource();
@@ -672,6 +682,10 @@ private Set<CompositeMappedFieldType> getCompositeFieldTypesFromMapper() {
         return compositeMappedFieldTypes;
     }
 
+    public boolean isFieldPartOfCompositeIndex(String field) {
+        return fieldsPartOfCompositeMappings.contains(field);
+    }
+
     public ObjectMapper getObjectMapper(String name) {
         return this.mapper == null ? null : this.mapper.objectMappers().get(name);
     }

server/src/main/java/org/opensearch/index/mapper/ObjectMapper.java

@@ -440,6 +440,15 @@ protected static void parseCompositeField(
                         + " feature flag in the JVM options"
                 );
             }
+            if (StarTreeIndexSettings.IS_COMPOSITE_INDEX_SETTING.get(parserContext.getSettings()) == false) {
+                throw new IllegalArgumentException(
+                    String.format(
+                        Locale.ROOT,
+                        "Set '%s' as true as part of index settings to use star tree index",
+                        StarTreeIndexSettings.IS_COMPOSITE_INDEX_SETTING.getKey()
+                    )
+                );
+            }
             Iterator<Map.Entry<String, Object>> iterator = compositeNode.entrySet().iterator();
             if (compositeNode.size() > StarTreeIndexSettings.STAR_TREE_MAX_FIELDS_SETTING.get(parserContext.getSettings())) {
                 throw new IllegalArgumentException(