diff --git a/core/src/main/java/org/elasticsearch/cluster/ClusterModule.java b/core/src/main/java/org/elasticsearch/cluster/ClusterModule.java
index fba16641ca3..7cafc20ce3f 100644
--- a/core/src/main/java/org/elasticsearch/cluster/ClusterModule.java
+++ b/core/src/main/java/org/elasticsearch/cluster/ClusterModule.java
@@ -119,9 +119,6 @@ public class ClusterModule extends AbstractModule {
     }
 
     private void registerBuiltinIndexSettings() {
-        registerIndexDynamicSetting(FilterAllocationDecider.INDEX_ROUTING_REQUIRE_GROUP + "*", Validator.EMPTY);
-        registerIndexDynamicSetting(FilterAllocationDecider.INDEX_ROUTING_INCLUDE_GROUP + "*", Validator.EMPTY);
-        registerIndexDynamicSetting(FilterAllocationDecider.INDEX_ROUTING_EXCLUDE_GROUP + "*", Validator.EMPTY);
         registerIndexDynamicSetting(IndexMetaData.SETTING_NUMBER_OF_REPLICAS, Validator.NON_NEGATIVE_INTEGER);
         registerIndexDynamicSetting(IndexMetaData.SETTING_AUTO_EXPAND_REPLICAS, Validator.EMPTY);
         registerIndexDynamicSetting(IndexMetaData.SETTING_READ_ONLY, Validator.EMPTY);
diff --git a/core/src/main/java/org/elasticsearch/cluster/metadata/IndexMetaData.java b/core/src/main/java/org/elasticsearch/cluster/metadata/IndexMetaData.java
index c1f10079768..8543aeab03e 100644
--- a/core/src/main/java/org/elasticsearch/cluster/metadata/IndexMetaData.java
+++ b/core/src/main/java/org/elasticsearch/cluster/metadata/IndexMetaData.java
@@ -37,6 +37,7 @@ import org.elasticsearch.common.collect.MapBuilder;
 import org.elasticsearch.common.compress.CompressedXContent;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
+import org.elasticsearch.common.settings.Setting;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.settings.loader.SettingsLoader;
 import org.elasticsearch.common.xcontent.FromXContentBuilder;
@@ -70,10 +71,6 @@ import static org.elasticsearch.common.settings.Settings.writeSettingsToStream;
  */
 public class IndexMetaData implements Diffable<IndexMetaData>, FromXContentBuilder<IndexMetaData>, ToXContent  {
 
-    public static final IndexMetaData PROTO = IndexMetaData.builder("")
-            .settings(Settings.builder().put(IndexMetaData.SETTING_VERSION_CREATED, Version.CURRENT))
-            .numberOfShards(1).numberOfReplicas(0).build();
-
     public interface Custom extends Diffable<Custom>, ToXContent {
 
         String type();
@@ -173,6 +170,14 @@ public class IndexMetaData implements Diffable<IndexMetaData>, FromXContentBuild
     public static final String SETTING_SHARED_FS_ALLOW_RECOVERY_ON_ANY_NODE = "index.shared_filesystem.recover_on_any_node";
     public static final String INDEX_UUID_NA_VALUE = "_na_";
 
+    public static final Setting<Settings> INDEX_ROUTING_REQUIRE_GROUP_SETTING = Setting.groupSetting("index.routing.allocation.require.", true, Setting.Scope.INDEX);
+    public static final Setting<Settings> INDEX_ROUTING_INCLUDE_GROUP_SETTING = Setting.groupSetting("index.routing.allocation.include.", true, Setting.Scope.INDEX);
+    public static final Setting<Settings> INDEX_ROUTING_EXCLUDE_GROUP_SETTING = Setting.groupSetting("index.routing.allocation.exclude.", true, Setting.Scope.INDEX);
+
+    public static final IndexMetaData PROTO = IndexMetaData.builder("")
+        .settings(Settings.builder().put(IndexMetaData.SETTING_VERSION_CREATED, Version.CURRENT))
+        .numberOfShards(1).numberOfReplicas(0).build();
+
     public static final String KEY_ACTIVE_ALLOCATIONS = "active_allocations";
 
     private final int numberOfShards;
@@ -758,22 +763,21 @@ public class IndexMetaData implements Diffable<IndexMetaData>, FromXContentBuild
                     filledActiveAllocationIds.put(i, Collections.emptySet());
                 }
             }
-
-            Map<String, String> requireMap = settings.getByPrefix("index.routing.allocation.require.").getAsMap();
+            final Map<String, String> requireMap = INDEX_ROUTING_REQUIRE_GROUP_SETTING.get(settings).getAsMap();
             final DiscoveryNodeFilters requireFilters;
             if (requireMap.isEmpty()) {
                 requireFilters = null;
             } else {
                 requireFilters = DiscoveryNodeFilters.buildFromKeyValue(AND, requireMap);
             }
-            Map<String, String> includeMap = settings.getByPrefix("index.routing.allocation.include.").getAsMap();
+            Map<String, String> includeMap = INDEX_ROUTING_INCLUDE_GROUP_SETTING.get(settings).getAsMap();
             final DiscoveryNodeFilters includeFilters;
             if (includeMap.isEmpty()) {
                 includeFilters = null;
             } else {
                 includeFilters = DiscoveryNodeFilters.buildFromKeyValue(OR, includeMap);
             }
-            Map<String, String> excludeMap = settings.getByPrefix("index.routing.allocation.exclude.").getAsMap();
+            Map<String, String> excludeMap = INDEX_ROUTING_EXCLUDE_GROUP_SETTING.get(settings).getAsMap();
             final DiscoveryNodeFilters excludeFilters;
             if (excludeMap.isEmpty()) {
                 excludeFilters = null;
diff --git a/core/src/main/java/org/elasticsearch/cluster/routing/allocation/decider/FilterAllocationDecider.java b/core/src/main/java/org/elasticsearch/cluster/routing/allocation/decider/FilterAllocationDecider.java
index eb9fe10e965..f8ff5f37aed 100644
--- a/core/src/main/java/org/elasticsearch/cluster/routing/allocation/decider/FilterAllocationDecider.java
+++ b/core/src/main/java/org/elasticsearch/cluster/routing/allocation/decider/FilterAllocationDecider.java
@@ -60,10 +60,6 @@ public class FilterAllocationDecider extends AllocationDecider {
 
     public static final String NAME = "filter";
 
-    public static final String INDEX_ROUTING_REQUIRE_GROUP = "index.routing.allocation.require.";
-    public static final String INDEX_ROUTING_INCLUDE_GROUP = "index.routing.allocation.include.";
-    public static final String INDEX_ROUTING_EXCLUDE_GROUP = "index.routing.allocation.exclude.";
-
     public static final Setting<Settings> CLUSTER_ROUTING_REQUIRE_GROUP_SETTING = Setting.groupSetting("cluster.routing.allocation.require.", true, Setting.Scope.CLUSTER);
     public static final Setting<Settings> CLUSTER_ROUTING_INCLUDE_GROUP_SETTING = Setting.groupSetting("cluster.routing.allocation.include.", true, Setting.Scope.CLUSTER);
     public static final Setting<Settings> CLUSTER_ROUTING_EXCLUDE_GROUP_SETTING = Setting.groupSetting("cluster.routing.allocation.exclude.", true, Setting.Scope.CLUSTER);
diff --git a/core/src/main/java/org/elasticsearch/index/IndexSettings.java b/core/src/main/java/org/elasticsearch/index/IndexSettings.java
index a473ce0cedb..7efa728f260 100644
--- a/core/src/main/java/org/elasticsearch/index/IndexSettings.java
+++ b/core/src/main/java/org/elasticsearch/index/IndexSettings.java
@@ -120,12 +120,34 @@ public final class IndexSettings {
 
 
     public static Set<Setting<?>> BUILT_IN_CLUSTER_SETTINGS = Collections.unmodifiableSet(new HashSet<>(Arrays.asList(
-        INDEX_TTL_DISABLE_PURGE_SETTING,
+        IndexSettings.INDEX_TTL_DISABLE_PURGE_SETTING,
         IndexStore.INDEX_STORE_THROTTLE_TYPE_SETTING,
         IndexStore.INDEX_STORE_THROTTLE_MAX_BYTES_PER_SEC_SETTING,
         MergeSchedulerConfig.AUTO_THROTTLE_SETTING,
         MergeSchedulerConfig.MAX_MERGE_COUNT_SETTING,
         MergeSchedulerConfig.MAX_THREAD_COUNT_SETTING,
+        IndexMetaData.INDEX_ROUTING_EXCLUDE_GROUP_SETTING,
+        IndexMetaData.INDEX_ROUTING_INCLUDE_GROUP_SETTING,
+        IndexMetaData.INDEX_ROUTING_REQUIRE_GROUP_SETTING,
+        SearchSlowLog.INDEX_SEARCH_SLOWLOG_THRESHOLD_FETCH_DEBUG_SETTING,
+        SearchSlowLog.INDEX_SEARCH_SLOWLOG_THRESHOLD_FETCH_WARN_SETTING,
+        SearchSlowLog.INDEX_SEARCH_SLOWLOG_THRESHOLD_FETCH_INFO_SETTING,
+        SearchSlowLog.INDEX_SEARCH_SLOWLOG_THRESHOLD_FETCH_TRACE_SETTING,
+        SearchSlowLog.INDEX_SEARCH_SLOWLOG_THRESHOLD_QUERY_WARN_SETTING,
+        SearchSlowLog.INDEX_SEARCH_SLOWLOG_THRESHOLD_QUERY_DEBUG_SETTING,
+        SearchSlowLog.INDEX_SEARCH_SLOWLOG_THRESHOLD_QUERY_INFO_SETTING,
+        SearchSlowLog.INDEX_SEARCH_SLOWLOG_THRESHOLD_QUERY_TRACE_SETTING,
+        SearchSlowLog.INDEX_SEARCH_SLOWLOG_LEVEL,
+        SearchSlowLog.INDEX_SEARCH_SLOWLOG_REFORMAT,
+        IndexingSlowLog.INDEX_INDEXING_SLOWLOG_THRESHOLD_INDEX_WARN_SETTING,
+        IndexingSlowLog.INDEX_INDEXING_SLOWLOG_THRESHOLD_INDEX_DEBUG_SETTING,
+        IndexingSlowLog.INDEX_INDEXING_SLOWLOG_THRESHOLD_INDEX_INFO_SETTING,
+        IndexingSlowLog.INDEX_INDEXING_SLOWLOG_THRESHOLD_INDEX_TRACE_SETTING,
+        IndexingSlowLog.INDEX_INDEXING_SLOWLOG_LEVEL_SETTING,
+        IndexingSlowLog.INDEX_INDEXING_SLOWLOG_REFORMAT_SETTING,
+        IndexingSlowLog.INDEX_INDEXING_SLOWLOG_MAX_SOURCE_CHARS_TO_LOG_SETTING,
+        MergePolicyConfig.INDEX_COMPOUND_FORMAT_SETTING,
+        MergePolicyConfig.INDEX_MERGE_POLICY_EXPUNGE_DELETES_ALLOWED_SETTING,
         IndexSettings.INDEX_TRANSLOG_DURABILITY_SETTING,
         IndexSettings.INDEX_WARMER_ENABLED_SETTING,
         IndexSettings.INDEX_REFRESH_INTERVAL_SETTING,
@@ -500,7 +522,6 @@ public final class IndexSettings {
     }
 
     <T> void addSettingsUpdateConsumer(Setting<T> setting, Consumer<T> consumer) {
-        scopedSettings.addSettingInternal(setting);
         scopedSettings.addSettingsUpdateConsumer(setting, consumer);
     }
 }
diff --git a/core/src/main/java/org/elasticsearch/indices/IndicesModule.java b/core/src/main/java/org/elasticsearch/indices/IndicesModule.java
index faf7f73dc23..3f4c4acb7eb 100644
--- a/core/src/main/java/org/elasticsearch/indices/IndicesModule.java
+++ b/core/src/main/java/org/elasticsearch/indices/IndicesModule.java
@@ -127,7 +127,6 @@ import java.util.Map;
  */
 public class IndicesModule extends AbstractModule {
 
-
     private final ExtensionPoint.ClassSet<QueryParser> queryParsers
         = new ExtensionPoint.ClassSet<>("query_parser", QueryParser.class);
 
diff --git a/core/src/test/java/org/elasticsearch/cluster/routing/allocation/ClusterRebalanceRoutingTests.java b/core/src/test/java/org/elasticsearch/cluster/routing/allocation/ClusterRebalanceRoutingTests.java
index fa9f4065dc1..827da901dc9 100644
--- a/core/src/test/java/org/elasticsearch/cluster/routing/allocation/ClusterRebalanceRoutingTests.java
+++ b/core/src/test/java/org/elasticsearch/cluster/routing/allocation/ClusterRebalanceRoutingTests.java
@@ -753,7 +753,7 @@ public class ClusterRebalanceRoutingTests extends ESAllocationTestCase {
 
         MetaData metaData = MetaData.builder()
                 .put(IndexMetaData.builder("test").settings(settings(Version.CURRENT)).numberOfShards(2).numberOfReplicas(0))
-                .put(IndexMetaData.builder("test1").settings(settings(Version.CURRENT).put(FilterAllocationDecider.INDEX_ROUTING_EXCLUDE_GROUP + "_id", "node1,node2")).numberOfShards(2).numberOfReplicas(0))
+                .put(IndexMetaData.builder("test1").settings(settings(Version.CURRENT).put(IndexMetaData.INDEX_ROUTING_EXCLUDE_GROUP_SETTING.getKey() + "_id", "node1,node2")).numberOfShards(2).numberOfReplicas(0))
                 .build();
 
         // we use a second index here (test1) that never gets assigned otherwise allocateUnassinged is never called if we don't have unassigned shards.
diff --git a/core/src/test/java/org/elasticsearch/gateway/MetaDataWriteDataNodesIT.java b/core/src/test/java/org/elasticsearch/gateway/MetaDataWriteDataNodesIT.java
index 1c3ec79dd94..d2f7bb888cd 100644
--- a/core/src/test/java/org/elasticsearch/gateway/MetaDataWriteDataNodesIT.java
+++ b/core/src/test/java/org/elasticsearch/gateway/MetaDataWriteDataNodesIT.java
@@ -64,7 +64,7 @@ public class MetaDataWriteDataNodesIT extends ESIntegTestCase {
         String node2 = nodeName2.get();
 
         String index = "index";
-        assertAcked(prepareCreate(index).setSettings(Settings.builder().put("index.number_of_replicas", 0).put(FilterAllocationDecider.INDEX_ROUTING_INCLUDE_GROUP + "_name", node1)));
+        assertAcked(prepareCreate(index).setSettings(Settings.builder().put("index.number_of_replicas", 0).put(IndexMetaData.INDEX_ROUTING_INCLUDE_GROUP_SETTING.getKey() + "_name", node1)));
         index(index, "doc", "1", jsonBuilder().startObject().field("text", "some text").endObject());
         ensureGreen();
         assertIndexInMetaState(node1, index);
@@ -72,7 +72,7 @@ public class MetaDataWriteDataNodesIT extends ESIntegTestCase {
         assertIndexInMetaState(masterNode, index);
 
         logger.debug("relocating index...");
-        client().admin().indices().prepareUpdateSettings(index).setSettings(Settings.builder().put(FilterAllocationDecider.INDEX_ROUTING_INCLUDE_GROUP + "_name", node2)).get();
+        client().admin().indices().prepareUpdateSettings(index).setSettings(Settings.builder().put(IndexMetaData.INDEX_ROUTING_INCLUDE_GROUP_SETTING.getKey() + "_name", node2)).get();
         client().admin().cluster().prepareHealth().setWaitForRelocatingShards(0).get();
         ensureGreen();
         assertIndexDirectoryDeleted(node1, index);
diff --git a/core/src/test/java/org/elasticsearch/index/IndexSettingsTests.java b/core/src/test/java/org/elasticsearch/index/IndexSettingsTests.java
index b166fd08f19..04fc30d53e0 100644
--- a/core/src/test/java/org/elasticsearch/index/IndexSettingsTests.java
+++ b/core/src/test/java/org/elasticsearch/index/IndexSettingsTests.java
@@ -47,6 +47,7 @@ public class IndexSettingsTests extends ESTestCase {
         Setting<Integer> integerSetting = Setting.intSetting("index.test.setting.int", -1, true, Setting.Scope.INDEX);
         IndexMetaData metaData = newIndexMeta("index", theSettings);
         IndexSettings settings = new IndexSettings(metaData, Settings.EMPTY);
+        settings.addSetting(integerSetting);
         settings.addSettingsUpdateConsumer(integerSetting, integer::set);
 
         assertEquals(version, settings.getIndexVersionCreated());
@@ -69,6 +70,8 @@ public class IndexSettingsTests extends ESTestCase {
         Setting<String> notUpdated = new Setting<>("index.not.updated", "", Function.identity(), true, Setting.Scope.INDEX);
 
         IndexSettings settings = new IndexSettings(newIndexMeta("index", theSettings), Settings.EMPTY);
+        settings.addSetting(integerSetting);
+        settings.addSetting(notUpdated);
         settings.addSettingsUpdateConsumer(integerSetting, integer::set);
         settings.addSettingsUpdateConsumer(notUpdated, builder::append);
         assertEquals(0, integer.get());
@@ -122,6 +125,7 @@ public class IndexSettingsTests extends ESTestCase {
         final AtomicInteger indexValue = new AtomicInteger(0);
         Setting<Integer> integerSetting = Setting.intSetting("index.foo.bar", -1, true, Setting.Scope.INDEX);
         IndexSettings settings = new IndexSettings(newIndexMeta("index", theSettings), nodeSettings);
+        settings.addSetting(integerSetting);
         settings.addSettingsUpdateConsumer(integerSetting, indexValue::set);
         assertEquals(numReplicas, settings.getNumberOfReplicas());
         assertEquals(numShards, settings.getNumberOfShards());
diff --git a/core/src/test/java/org/elasticsearch/indices/recovery/IndexRecoveryIT.java b/core/src/test/java/org/elasticsearch/indices/recovery/IndexRecoveryIT.java
index dc61d4bc5fe..3f217c12be5 100644
--- a/core/src/test/java/org/elasticsearch/indices/recovery/IndexRecoveryIT.java
+++ b/core/src/test/java/org/elasticsearch/indices/recovery/IndexRecoveryIT.java
@@ -547,7 +547,7 @@ public class IndexRecoveryIT extends ESIntegTestCase {
         client().admin().indices().prepareCreate(indexName)
                 .setSettings(
                         Settings.builder()
-                                .put(FilterAllocationDecider.INDEX_ROUTING_INCLUDE_GROUP + "color", "blue")
+                                .put(IndexMetaData.INDEX_ROUTING_INCLUDE_GROUP_SETTING.getKey() + "color", "blue")
                                 .put(IndexMetaData.SETTING_NUMBER_OF_SHARDS, 1)
                                 .put(IndexMetaData.SETTING_NUMBER_OF_REPLICAS, 0)
                 ).get();
@@ -593,7 +593,7 @@ public class IndexRecoveryIT extends ESIntegTestCase {
         logger.info("--> starting recovery from blue to red");
         client().admin().indices().prepareUpdateSettings(indexName).setSettings(
                 Settings.builder()
-                        .put(FilterAllocationDecider.INDEX_ROUTING_INCLUDE_GROUP + "color", "red,blue")
+                        .put(IndexMetaData.INDEX_ROUTING_INCLUDE_GROUP_SETTING.getKey() + "color", "red,blue")
                         .put(IndexMetaData.SETTING_NUMBER_OF_REPLICAS, 1)
         ).get();
 
diff --git a/core/src/test/java/org/elasticsearch/indices/store/IndicesStoreIntegrationIT.java b/core/src/test/java/org/elasticsearch/indices/store/IndicesStoreIntegrationIT.java
index 9c9cb01e597..18d56eee88f 100644
--- a/core/src/test/java/org/elasticsearch/indices/store/IndicesStoreIntegrationIT.java
+++ b/core/src/test/java/org/elasticsearch/indices/store/IndicesStoreIntegrationIT.java
@@ -306,7 +306,7 @@ public class IndicesStoreIntegrationIT extends ESIntegTestCase {
         assertAcked(prepareCreate("test").setSettings(Settings.builder()
                         .put(IndexMetaData.SETTING_NUMBER_OF_SHARDS, 3)
                         .put(IndexMetaData.SETTING_NUMBER_OF_REPLICAS, 1)
-                        .put(FilterAllocationDecider.INDEX_ROUTING_EXCLUDE_GROUP + "_name", node4)
+                        .put(IndexMetaData.INDEX_ROUTING_EXCLUDE_GROUP_SETTING.getKey() + "_name", node4)
         ));
         assertFalse(client().admin().cluster().prepareHealth().setWaitForRelocatingShards(0).setWaitForGreenStatus().setWaitForNodes("5").get().isTimedOut());
 
@@ -328,7 +328,7 @@ public class IndicesStoreIntegrationIT extends ESIntegTestCase {
         logger.debug("--> allowing index to be assigned to node [{}]", node4);
         assertAcked(client().admin().indices().prepareUpdateSettings("test").setSettings(
                 Settings.builder()
-                        .put(FilterAllocationDecider.INDEX_ROUTING_EXCLUDE_GROUP + "_name", "NONE")));
+                        .put(IndexMetaData.INDEX_ROUTING_EXCLUDE_GROUP_SETTING.getKey() + "_name", "NONE")));
 
         assertAcked(client().admin().cluster().prepareUpdateSettings().setTransientSettings(Settings.builder()
                 .put(EnableAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ENABLE_SETTING.getKey(), "all")));
diff --git a/core/src/test/java/org/elasticsearch/snapshots/SharedClusterSnapshotRestoreIT.java b/core/src/test/java/org/elasticsearch/snapshots/SharedClusterSnapshotRestoreIT.java
index a785cc3cc1c..dac6ac0904d 100644
--- a/core/src/test/java/org/elasticsearch/snapshots/SharedClusterSnapshotRestoreIT.java
+++ b/core/src/test/java/org/elasticsearch/snapshots/SharedClusterSnapshotRestoreIT.java
@@ -748,7 +748,7 @@ public class SharedClusterSnapshotRestoreIT extends AbstractSnapshotIntegTestCas
                         .put("location", randomRepoPath())));
 
         logger.info("-->  creating index that cannot be allocated");
-        prepareCreate("test-idx", 2, Settings.builder().put(FilterAllocationDecider.INDEX_ROUTING_INCLUDE_GROUP + ".tag", "nowhere").put("index.number_of_shards", 3)).get();
+        prepareCreate("test-idx", 2, Settings.builder().put(IndexMetaData.INDEX_ROUTING_INCLUDE_GROUP_SETTING.getKey() + ".tag", "nowhere").put("index.number_of_shards", 3)).get();
 
         logger.info("--> snapshot");
         CreateSnapshotResponse createSnapshotResponse = client.admin().cluster().prepareCreateSnapshot("test-repo", "test-snap").setWaitForCompletion(true).setIndices("test-idx").get();
diff --git a/test/framework/src/main/java/org/elasticsearch/index/MockEngineFactoryPlugin.java b/test/framework/src/main/java/org/elasticsearch/index/MockEngineFactoryPlugin.java
index db63d137f32..ed848b33e7c 100644
--- a/test/framework/src/main/java/org/elasticsearch/index/MockEngineFactoryPlugin.java
+++ b/test/framework/src/main/java/org/elasticsearch/index/MockEngineFactoryPlugin.java
@@ -24,6 +24,7 @@ import org.elasticsearch.common.inject.AbstractModule;
 import org.elasticsearch.common.inject.Module;
 import org.elasticsearch.plugins.Plugin;
 import org.elasticsearch.test.engine.MockEngineFactory;
+import org.elasticsearch.test.engine.MockEngineSupport;
 
 import java.util.Collection;
 import java.util.Collections;
@@ -41,8 +42,12 @@ public class MockEngineFactoryPlugin extends Plugin {
 
     private Class<? extends FilterDirectoryReader> readerWrapper = AssertingDirectoryReader.class;
 
+
+
     @Override
     public void onIndexModule(IndexModule module) {
+        module.addSetting(MockEngineSupport.DISABLE_FLUSH_ON_CLOSE);
+        module.addSetting(MockEngineSupport.WRAP_READER_RATIO);
         module.engineFactory.set(new MockEngineFactory(readerWrapper));
     }