1.SettingsModule概述

/** * A module that binds the provided settings to the {
    @link Settings} interface. */

2.Setting

2.1 IndexScopedSettings

/** * Encapsulates all valid index level settings. * @see Property#IndexScope */

内置的设置

public static final Set
     
      > BUILT_IN_INDEX_SETTINGS = Collections.unmodifiableSet(new HashSet<>(Arrays.asList(        MaxRetryAllocationDecider.SETTING_ALLOCATION_MAX_RETRY,        MergeSchedulerConfig.AUTO_THROTTLE_SETTING,        MergeSchedulerConfig.MAX_MERGE_COUNT_SETTING,        MergeSchedulerConfig.MAX_THREAD_COUNT_SETTING,        IndexMetaData.SETTING_INDEX_VERSION_CREATED,        IndexMetaData.INDEX_ROUTING_EXCLUDE_GROUP_SETTING,        IndexMetaData.INDEX_ROUTING_INCLUDE_GROUP_SETTING,        IndexMetaData.INDEX_ROUTING_REQUIRE_GROUP_SETTING,        IndexMetaData.INDEX_AUTO_EXPAND_REPLICAS_SETTING,        IndexMetaData.INDEX_NUMBER_OF_REPLICAS_SETTING,        IndexMetaData.INDEX_NUMBER_OF_SHARDS_SETTING,        IndexMetaData.INDEX_ROUTING_PARTITION_SIZE_SETTING,        IndexMetaData.INDEX_NUMBER_OF_ROUTING_SHARDS_SETTING,        IndexMetaData.INDEX_READ_ONLY_SETTING,        IndexMetaData.INDEX_BLOCKS_READ_SETTING,        IndexMetaData.INDEX_BLOCKS_WRITE_SETTING,        IndexMetaData.INDEX_BLOCKS_METADATA_SETTING,        IndexMetaData.INDEX_BLOCKS_READ_ONLY_ALLOW_DELETE_SETTING,        IndexMetaData.INDEX_PRIORITY_SETTING,        IndexMetaData.INDEX_DATA_PATH_SETTING,        IndexMetaData.INDEX_FORMAT_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,        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_DELETES_PCT_ALLOWED_SETTING,        MergePolicyConfig.INDEX_MERGE_POLICY_EXPUNGE_DELETES_ALLOWED_SETTING,        MergePolicyConfig.INDEX_MERGE_POLICY_FLOOR_SEGMENT_SETTING,        MergePolicyConfig.INDEX_MERGE_POLICY_MAX_MERGE_AT_ONCE_SETTING,        MergePolicyConfig.INDEX_MERGE_POLICY_MAX_MERGE_AT_ONCE_EXPLICIT_SETTING,        MergePolicyConfig.INDEX_MERGE_POLICY_MAX_MERGED_SEGMENT_SETTING,        MergePolicyConfig.INDEX_MERGE_POLICY_SEGMENTS_PER_TIER_SETTING,        MergePolicyConfig.INDEX_MERGE_POLICY_RECLAIM_DELETES_WEIGHT_SETTING,        IndexSortConfig.INDEX_SORT_FIELD_SETTING,        IndexSortConfig.INDEX_SORT_ORDER_SETTING,        IndexSortConfig.INDEX_SORT_MISSING_SETTING,        IndexSortConfig.INDEX_SORT_MODE_SETTING,        IndexSettings.INDEX_TRANSLOG_DURABILITY_SETTING,        IndexSettings.INDEX_WARMER_ENABLED_SETTING,        IndexSettings.INDEX_REFRESH_INTERVAL_SETTING,        IndexSettings.MAX_RESULT_WINDOW_SETTING,        IndexSettings.MAX_INNER_RESULT_WINDOW_SETTING,        IndexSettings.MAX_TOKEN_COUNT_SETTING,        IndexSettings.MAX_DOCVALUE_FIELDS_SEARCH_SETTING,        IndexSettings.MAX_SCRIPT_FIELDS_SETTING,        IndexSettings.MAX_NGRAM_DIFF_SETTING,        IndexSettings.MAX_SHINGLE_DIFF_SETTING,        IndexSettings.MAX_RESCORE_WINDOW_SETTING,        IndexSettings.MAX_ADJACENCY_MATRIX_FILTERS_SETTING,        IndexSettings.MAX_ANALYZED_OFFSET_SETTING,        IndexSettings.MAX_TERMS_COUNT_SETTING,        IndexSettings.INDEX_TRANSLOG_SYNC_INTERVAL_SETTING,        IndexSettings.DEFAULT_FIELD_SETTING,        IndexSettings.QUERY_STRING_LENIENT_SETTING,        IndexSettings.ALLOW_UNMAPPED,        IndexSettings.INDEX_CHECK_ON_STARTUP,        IndexSettings.MAX_REFRESH_LISTENERS_PER_SHARD,        IndexSettings.MAX_SLICES_PER_SCROLL,        IndexSettings.MAX_REGEX_LENGTH_SETTING,        ShardsLimitAllocationDecider.INDEX_TOTAL_SHARDS_PER_NODE_SETTING,        IndexSettings.INDEX_GC_DELETES_SETTING,        IndexSettings.INDEX_SOFT_DELETES_SETTING,        IndexSettings.INDEX_SOFT_DELETES_RETENTION_OPERATIONS_SETTING,        IndicesRequestCache.INDEX_CACHE_REQUEST_ENABLED_SETTING,        UnassignedInfo.INDEX_DELAYED_NODE_LEFT_TIMEOUT_SETTING,        EnableAllocationDecider.INDEX_ROUTING_REBALANCE_ENABLE_SETTING,        EnableAllocationDecider.INDEX_ROUTING_ALLOCATION_ENABLE_SETTING,        IndexSettings.INDEX_TRANSLOG_FLUSH_THRESHOLD_SIZE_SETTING,        IndexSettings.INDEX_TRANSLOG_GENERATION_THRESHOLD_SIZE_SETTING,        IndexSettings.INDEX_TRANSLOG_RETENTION_AGE_SETTING,        IndexSettings.INDEX_TRANSLOG_RETENTION_SIZE_SETTING,        IndexSettings.INDEX_SEARCH_IDLE_AFTER,        IndexSettings.INDEX_SEARCH_THROTTLED,        IndexFieldDataService.INDEX_FIELDDATA_CACHE_KEY,        FieldMapper.IGNORE_MALFORMED_SETTING,        FieldMapper.COERCE_SETTING,        Store.INDEX_STORE_STATS_REFRESH_INTERVAL_SETTING,        MapperService.INDEX_MAPPER_DYNAMIC_SETTING,        MapperService.INDEX_MAPPING_NESTED_FIELDS_LIMIT_SETTING,        MapperService.INDEX_MAPPING_NESTED_DOCS_LIMIT_SETTING,        MapperService.INDEX_MAPPING_TOTAL_FIELDS_LIMIT_SETTING,        MapperService.INDEX_MAPPING_DEPTH_LIMIT_SETTING,        BitsetFilterCache.INDEX_LOAD_RANDOM_ACCESS_FILTERS_EAGERLY_SETTING,        IndexModule.INDEX_STORE_TYPE_SETTING,        IndexModule.INDEX_STORE_PRE_LOAD_SETTING,        IndexModule.INDEX_QUERY_CACHE_ENABLED_SETTING,        FsDirectoryService.INDEX_LOCK_FACTOR_SETTING,        EngineConfig.INDEX_CODEC_SETTING,        EngineConfig.INDEX_OPTIMIZE_AUTO_GENERATED_IDS,        IndexMetaData.SETTING_WAIT_FOR_ACTIVE_SHARDS,        IndexSettings.DEFAULT_PIPELINE,        // validate that built-in similarities don't get redefined        Setting.groupSetting("index.similarity.", (s) -> {            Map
      
        groups = s.getAsGroups();            for (String key : SimilarityService.BUILT_IN.keySet()) {                if (groups.containsKey(key)) {                    throw new IllegalArgumentException("illegal value for [index.similarity." + key +                            "] cannot redefine built-in similarity");                }            }        }, Property.IndexScope), // this allows similarity settings to be passed        Setting.groupSetting("index.analysis.", Property.IndexScope) // this allows analysis settings to be passed    )));
      
     

包含的setting结构图如下：

 

 

 

2.2 ClusterSettings

/** * Encapsulates all valid cluster level settings. */

内置的设置

public static Set
     
      > BUILT_IN_CLUSTER_SETTINGS = Collections.unmodifiableSet(new HashSet<>(            Arrays.asList(AwarenessAllocationDecider.CLUSTER_ROUTING_ALLOCATION_AWARENESS_ATTRIBUTE_SETTING,                    TransportClient.CLIENT_TRANSPORT_NODES_SAMPLER_INTERVAL, // TODO these transport client settings are kind                    // of odd here and should only be valid if we are a transport client                    TransportClient.CLIENT_TRANSPORT_PING_TIMEOUT,                    TransportClient.CLIENT_TRANSPORT_IGNORE_CLUSTER_NAME,                    TransportClient.CLIENT_TRANSPORT_SNIFF,                    AwarenessAllocationDecider.CLUSTER_ROUTING_ALLOCATION_AWARENESS_FORCE_GROUP_SETTING,                    BalancedShardsAllocator.INDEX_BALANCE_FACTOR_SETTING,                    BalancedShardsAllocator.SHARD_BALANCE_FACTOR_SETTING,                    BalancedShardsAllocator.THRESHOLD_SETTING,                    ClusterRebalanceAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE_SETTING,                    ConcurrentRebalanceAllocationDecider.CLUSTER_ROUTING_ALLOCATION_CLUSTER_CONCURRENT_REBALANCE_SETTING,                    EnableAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ENABLE_SETTING,                    EnableAllocationDecider.CLUSTER_ROUTING_REBALANCE_ENABLE_SETTING,                    FilterAllocationDecider.CLUSTER_ROUTING_INCLUDE_GROUP_SETTING,                    FilterAllocationDecider.CLUSTER_ROUTING_EXCLUDE_GROUP_SETTING,                    FilterAllocationDecider.CLUSTER_ROUTING_REQUIRE_GROUP_SETTING,                    FsRepository.REPOSITORIES_CHUNK_SIZE_SETTING,                    FsRepository.REPOSITORIES_COMPRESS_SETTING,                    FsRepository.REPOSITORIES_LOCATION_SETTING,                    IndicesQueryCache.INDICES_CACHE_QUERY_SIZE_SETTING,                    IndicesQueryCache.INDICES_CACHE_QUERY_COUNT_SETTING,                    IndicesQueryCache.INDICES_QUERIES_CACHE_ALL_SEGMENTS_SETTING,                    MappingUpdatedAction.INDICES_MAPPING_DYNAMIC_TIMEOUT_SETTING,                    MetaData.SETTING_READ_ONLY_SETTING,                    MetaData.SETTING_READ_ONLY_ALLOW_DELETE_SETTING,                    MetaData.SETTING_CLUSTER_MAX_SHARDS_PER_NODE,                    RecoverySettings.INDICES_RECOVERY_MAX_BYTES_PER_SEC_SETTING,                    RecoverySettings.INDICES_RECOVERY_RETRY_DELAY_STATE_SYNC_SETTING,                    RecoverySettings.INDICES_RECOVERY_RETRY_DELAY_NETWORK_SETTING,                    RecoverySettings.INDICES_RECOVERY_ACTIVITY_TIMEOUT_SETTING,                    RecoverySettings.INDICES_RECOVERY_INTERNAL_ACTION_TIMEOUT_SETTING,                    RecoverySettings.INDICES_RECOVERY_INTERNAL_LONG_ACTION_TIMEOUT_SETTING,                    ThrottlingAllocationDecider.CLUSTER_ROUTING_ALLOCATION_NODE_INITIAL_PRIMARIES_RECOVERIES_SETTING,                    ThrottlingAllocationDecider.CLUSTER_ROUTING_ALLOCATION_NODE_CONCURRENT_INCOMING_RECOVERIES_SETTING,                    ThrottlingAllocationDecider.CLUSTER_ROUTING_ALLOCATION_NODE_CONCURRENT_OUTGOING_RECOVERIES_SETTING,                    ThrottlingAllocationDecider.CLUSTER_ROUTING_ALLOCATION_NODE_CONCURRENT_RECOVERIES_SETTING,                    DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_LOW_DISK_WATERMARK_SETTING,                    DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_HIGH_DISK_WATERMARK_SETTING,                    DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_DISK_FLOOD_STAGE_WATERMARK_SETTING,                    DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_DISK_THRESHOLD_ENABLED_SETTING,                    DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_INCLUDE_RELOCATIONS_SETTING,                    DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_REROUTE_INTERVAL_SETTING,                    SameShardAllocationDecider.CLUSTER_ROUTING_ALLOCATION_SAME_HOST_SETTING,                    InternalClusterInfoService.INTERNAL_CLUSTER_INFO_UPDATE_INTERVAL_SETTING,                    InternalClusterInfoService.INTERNAL_CLUSTER_INFO_TIMEOUT_SETTING,                    DestructiveOperations.REQUIRES_NAME_SETTING,                    DiscoverySettings.PUBLISH_TIMEOUT_SETTING,                    DiscoverySettings.PUBLISH_DIFF_ENABLE_SETTING,                    DiscoverySettings.COMMIT_TIMEOUT_SETTING,                    DiscoverySettings.NO_MASTER_BLOCK_SETTING,                    GatewayService.EXPECTED_DATA_NODES_SETTING,                    GatewayService.EXPECTED_MASTER_NODES_SETTING,                    GatewayService.EXPECTED_NODES_SETTING,                    GatewayService.RECOVER_AFTER_DATA_NODES_SETTING,                    GatewayService.RECOVER_AFTER_MASTER_NODES_SETTING,                    GatewayService.RECOVER_AFTER_NODES_SETTING,                    GatewayService.RECOVER_AFTER_TIME_SETTING,                    NetworkModule.HTTP_DEFAULT_TYPE_SETTING,                    NetworkModule.TRANSPORT_DEFAULT_TYPE_SETTING,                    NetworkModule.HTTP_TYPE_SETTING,                    NetworkModule.TRANSPORT_TYPE_SETTING,                    HttpTransportSettings.SETTING_CORS_ALLOW_CREDENTIALS,                    HttpTransportSettings.SETTING_CORS_ENABLED,                    HttpTransportSettings.SETTING_CORS_MAX_AGE,                    HttpTransportSettings.SETTING_HTTP_DETAILED_ERRORS_ENABLED,                    HttpTransportSettings.SETTING_CORS_ALLOW_ORIGIN,                    HttpTransportSettings.SETTING_HTTP_HOST,                    HttpTransportSettings.SETTING_HTTP_PUBLISH_HOST,                    HttpTransportSettings.SETTING_HTTP_BIND_HOST,                    HttpTransportSettings.SETTING_HTTP_PORT,                    HttpTransportSettings.SETTING_HTTP_PUBLISH_PORT,                    HttpTransportSettings.SETTING_PIPELINING_MAX_EVENTS,                    HttpTransportSettings.SETTING_HTTP_COMPRESSION,                    HttpTransportSettings.SETTING_HTTP_COMPRESSION_LEVEL,                    HttpTransportSettings.SETTING_CORS_ALLOW_METHODS,                    HttpTransportSettings.SETTING_CORS_ALLOW_HEADERS,                    HttpTransportSettings.SETTING_HTTP_DETAILED_ERRORS_ENABLED,                    HttpTransportSettings.SETTING_HTTP_CONTENT_TYPE_REQUIRED,                    HttpTransportSettings.SETTING_HTTP_MAX_CONTENT_LENGTH,                    HttpTransportSettings.SETTING_HTTP_MAX_CHUNK_SIZE,                    HttpTransportSettings.SETTING_HTTP_MAX_HEADER_SIZE,                    HttpTransportSettings.SETTING_HTTP_MAX_WARNING_HEADER_COUNT,                    HttpTransportSettings.SETTING_HTTP_MAX_WARNING_HEADER_SIZE,                    HttpTransportSettings.SETTING_HTTP_MAX_INITIAL_LINE_LENGTH,                    HttpTransportSettings.SETTING_HTTP_READ_TIMEOUT,                    HttpTransportSettings.SETTING_HTTP_RESET_COOKIES,                    HttpTransportSettings.SETTING_HTTP_TCP_NO_DELAY,                    HttpTransportSettings.SETTING_HTTP_TCP_KEEP_ALIVE,                    HttpTransportSettings.SETTING_HTTP_TCP_REUSE_ADDRESS,                    HttpTransportSettings.SETTING_HTTP_TCP_SEND_BUFFER_SIZE,                    HttpTransportSettings.SETTING_HTTP_TCP_RECEIVE_BUFFER_SIZE,                    HierarchyCircuitBreakerService.USE_REAL_MEMORY_USAGE_SETTING,                    HierarchyCircuitBreakerService.TOTAL_CIRCUIT_BREAKER_LIMIT_SETTING,                    HierarchyCircuitBreakerService.FIELDDATA_CIRCUIT_BREAKER_LIMIT_SETTING,                    HierarchyCircuitBreakerService.FIELDDATA_CIRCUIT_BREAKER_OVERHEAD_SETTING,                    HierarchyCircuitBreakerService.IN_FLIGHT_REQUESTS_CIRCUIT_BREAKER_LIMIT_SETTING,                    HierarchyCircuitBreakerService.IN_FLIGHT_REQUESTS_CIRCUIT_BREAKER_OVERHEAD_SETTING,                    HierarchyCircuitBreakerService.REQUEST_CIRCUIT_BREAKER_LIMIT_SETTING,                    HierarchyCircuitBreakerService.REQUEST_CIRCUIT_BREAKER_OVERHEAD_SETTING,                    HierarchyCircuitBreakerService.ACCOUNTING_CIRCUIT_BREAKER_LIMIT_SETTING,                    HierarchyCircuitBreakerService.ACCOUNTING_CIRCUIT_BREAKER_OVERHEAD_SETTING,                    IndexModule.NODE_STORE_ALLOW_MMAPFS,                    ClusterService.CLUSTER_SERVICE_SLOW_TASK_LOGGING_THRESHOLD_SETTING,                    ClusterService.USER_DEFINED_META_DATA,                    SearchService.DEFAULT_SEARCH_TIMEOUT_SETTING,                    SearchService.DEFAULT_ALLOW_PARTIAL_SEARCH_RESULTS,                    ElectMasterService.DISCOVERY_ZEN_MINIMUM_MASTER_NODES_SETTING,                    TransportSearchAction.SHARD_COUNT_LIMIT_SETTING,                    RemoteClusterAware.REMOTE_CLUSTERS_SEEDS,                    RemoteClusterAware.SEARCH_REMOTE_CLUSTERS_SEEDS,                    RemoteClusterAware.REMOTE_CLUSTERS_PROXY,                    RemoteClusterAware.SEARCH_REMOTE_CLUSTERS_PROXY,                    RemoteClusterService.REMOTE_CLUSTER_SKIP_UNAVAILABLE,                    RemoteClusterService.SEARCH_REMOTE_CLUSTER_SKIP_UNAVAILABLE,                    RemoteClusterService.REMOTE_CONNECTIONS_PER_CLUSTER,                    RemoteClusterService.SEARCH_REMOTE_CONNECTIONS_PER_CLUSTER,                    RemoteClusterService.REMOTE_INITIAL_CONNECTION_TIMEOUT_SETTING,                    RemoteClusterService.SEARCH_REMOTE_INITIAL_CONNECTION_TIMEOUT_SETTING,                    RemoteClusterService.REMOTE_NODE_ATTRIBUTE,                    RemoteClusterService.SEARCH_REMOTE_NODE_ATTRIBUTE,                    RemoteClusterService.ENABLE_REMOTE_CLUSTERS,                    RemoteClusterService.SEARCH_ENABLE_REMOTE_CLUSTERS,                    TransportService.TRACE_LOG_EXCLUDE_SETTING,                    TransportService.TRACE_LOG_INCLUDE_SETTING,                    TransportCloseIndexAction.CLUSTER_INDICES_CLOSE_ENABLE_SETTING,                    ShardsLimitAllocationDecider.CLUSTER_TOTAL_SHARDS_PER_NODE_SETTING,                    NodeConnectionsService.CLUSTER_NODE_RECONNECT_INTERVAL_SETTING,                    HierarchyCircuitBreakerService.FIELDDATA_CIRCUIT_BREAKER_TYPE_SETTING,                    HierarchyCircuitBreakerService.REQUEST_CIRCUIT_BREAKER_TYPE_SETTING,                    Transport.TRANSPORT_TCP_COMPRESS,                    TcpTransport.HOST,                    TcpTransport.PUBLISH_HOST,                    TcpTransport.BIND_HOST,                    TcpTransport.PUBLISH_PORT,                    TcpTransport.PORT,                    TcpTransport.BIND_HOST_PROFILE,                    TcpTransport.PUBLISH_HOST_PROFILE,                    TcpTransport.PUBLISH_PORT_PROFILE,                    TcpTransport.PORT_PROFILE,                    TcpTransport.TCP_NO_DELAY_PROFILE,                    TcpTransport.TCP_KEEP_ALIVE_PROFILE,                    TcpTransport.TCP_REUSE_ADDRESS_PROFILE,                    TcpTransport.TCP_SEND_BUFFER_SIZE_PROFILE,                    TcpTransport.TCP_RECEIVE_BUFFER_SIZE_PROFILE,                    TransportService.CONNECTIONS_PER_NODE_RECOVERY,                    TransportService.CONNECTIONS_PER_NODE_BULK,                    TransportService.CONNECTIONS_PER_NODE_REG,                    TransportService.CONNECTIONS_PER_NODE_STATE,                    TransportService.CONNECTIONS_PER_NODE_PING,                    TransportService.TCP_CONNECT_TIMEOUT,                    TcpTransport.PING_SCHEDULE,                    NetworkService.NETWORK_SERVER,                    TcpTransport.TCP_NO_DELAY,                    TcpTransport.TCP_KEEP_ALIVE,                    TcpTransport.TCP_REUSE_ADDRESS,                    TcpTransport.TCP_SEND_BUFFER_SIZE,                    TcpTransport.TCP_RECEIVE_BUFFER_SIZE,                    NetworkService.GLOBAL_NETWORK_HOST_SETTING,                    NetworkService.GLOBAL_NETWORK_BINDHOST_SETTING,                    NetworkService.GLOBAL_NETWORK_PUBLISHHOST_SETTING,                    NetworkService.TCP_NO_DELAY,                    NetworkService.TCP_KEEP_ALIVE,                    NetworkService.TCP_REUSE_ADDRESS,                    NetworkService.TCP_SEND_BUFFER_SIZE,                    NetworkService.TCP_RECEIVE_BUFFER_SIZE,                    NetworkService.TCP_CONNECT_TIMEOUT,                    IndexSettings.QUERY_STRING_ANALYZE_WILDCARD,                    IndexSettings.QUERY_STRING_ALLOW_LEADING_WILDCARD,                    ScriptService.SCRIPT_CACHE_SIZE_SETTING,                    ScriptService.SCRIPT_CACHE_EXPIRE_SETTING,                    ScriptService.SCRIPT_MAX_SIZE_IN_BYTES,                    ScriptService.SCRIPT_MAX_COMPILATIONS_RATE,                    ScriptService.TYPES_ALLOWED_SETTING,                    ScriptService.CONTEXTS_ALLOWED_SETTING,                    IndicesService.INDICES_CACHE_CLEAN_INTERVAL_SETTING,                    IndicesFieldDataCache.INDICES_FIELDDATA_CACHE_SIZE_KEY,                    IndicesRequestCache.INDICES_CACHE_QUERY_SIZE,                    IndicesRequestCache.INDICES_CACHE_QUERY_EXPIRE,                    HunspellService.HUNSPELL_LAZY_LOAD,                    HunspellService.HUNSPELL_IGNORE_CASE,                    HunspellService.HUNSPELL_DICTIONARY_OPTIONS,                    IndicesStore.INDICES_STORE_DELETE_SHARD_TIMEOUT,                    Environment.PATH_DATA_SETTING,                    Environment.PATH_HOME_SETTING,                    Environment.PATH_LOGS_SETTING,                    Environment.PATH_REPO_SETTING,                    Environment.PATH_SHARED_DATA_SETTING,                    Environment.PIDFILE_SETTING,                    NodeEnvironment.NODE_ID_SEED_SETTING,                    DiscoverySettings.INITIAL_STATE_TIMEOUT_SETTING,                    DiscoveryModule.DISCOVERY_TYPE_SETTING,                    DiscoveryModule.DISCOVERY_HOSTS_PROVIDER_SETTING,                    FaultDetection.PING_RETRIES_SETTING,                    FaultDetection.PING_TIMEOUT_SETTING,                    FaultDetection.REGISTER_CONNECTION_LISTENER_SETTING,                    FaultDetection.PING_INTERVAL_SETTING,                    FaultDetection.CONNECT_ON_NETWORK_DISCONNECT_SETTING,                    ZenDiscovery.PING_TIMEOUT_SETTING,                    ZenDiscovery.JOIN_TIMEOUT_SETTING,                    ZenDiscovery.JOIN_RETRY_ATTEMPTS_SETTING,                    ZenDiscovery.JOIN_RETRY_DELAY_SETTING,                    ZenDiscovery.MAX_PINGS_FROM_ANOTHER_MASTER_SETTING,                    ZenDiscovery.SEND_LEAVE_REQUEST_SETTING,                    ZenDiscovery.MASTER_ELECTION_WAIT_FOR_JOINS_TIMEOUT_SETTING,                    ZenDiscovery.MASTER_ELECTION_IGNORE_NON_MASTER_PINGS_SETTING,                    ZenDiscovery.MAX_PENDING_CLUSTER_STATES_SETTING,                    SettingsBasedHostsProvider.DISCOVERY_ZEN_PING_UNICAST_HOSTS_SETTING,                    UnicastZenPing.DISCOVERY_ZEN_PING_UNICAST_CONCURRENT_CONNECTS_SETTING,                    UnicastZenPing.DISCOVERY_ZEN_PING_UNICAST_HOSTS_RESOLVE_TIMEOUT,                    SearchService.DEFAULT_KEEPALIVE_SETTING,                    SearchService.KEEPALIVE_INTERVAL_SETTING,                    SearchService.MAX_KEEPALIVE_SETTING,                    MultiBucketConsumerService.MAX_BUCKET_SETTING,                    SearchService.LOW_LEVEL_CANCELLATION_SETTING,                    Node.WRITE_PORTS_FILE_SETTING,                    Node.NODE_NAME_SETTING,                    Node.NODE_DATA_SETTING,                    Node.NODE_MASTER_SETTING,                    Node.NODE_INGEST_SETTING,                    Node.NODE_ATTRIBUTES,                    Node.NODE_LOCAL_STORAGE_SETTING,                    AutoCreateIndex.AUTO_CREATE_INDEX_SETTING,                    BaseRestHandler.MULTI_ALLOW_EXPLICIT_INDEX,                    ClusterName.CLUSTER_NAME_SETTING,                    Client.CLIENT_TYPE_SETTING_S,                    ClusterModule.SHARDS_ALLOCATOR_TYPE_SETTING,                    EsExecutors.PROCESSORS_SETTING,                    ThreadContext.DEFAULT_HEADERS_SETTING,                    TcpTransport.DEFAULT_FEATURES_SETTING,                    Loggers.LOG_DEFAULT_LEVEL_SETTING,                    Loggers.LOG_LEVEL_SETTING,                    NodeEnvironment.MAX_LOCAL_STORAGE_NODES_SETTING,                    NodeEnvironment.ENABLE_LUCENE_SEGMENT_INFOS_TRACE_SETTING,                    OsService.REFRESH_INTERVAL_SETTING,                    ProcessService.REFRESH_INTERVAL_SETTING,                    JvmService.REFRESH_INTERVAL_SETTING,                    FsService.REFRESH_INTERVAL_SETTING,                    JvmGcMonitorService.ENABLED_SETTING,                    JvmGcMonitorService.REFRESH_INTERVAL_SETTING,                    JvmGcMonitorService.GC_SETTING,                    JvmGcMonitorService.GC_OVERHEAD_WARN_SETTING,                    JvmGcMonitorService.GC_OVERHEAD_INFO_SETTING,                    JvmGcMonitorService.GC_OVERHEAD_DEBUG_SETTING,                    PageCacheRecycler.LIMIT_HEAP_SETTING,                    PageCacheRecycler.WEIGHT_BYTES_SETTING,                    PageCacheRecycler.WEIGHT_INT_SETTING,                    PageCacheRecycler.WEIGHT_LONG_SETTING,                    PageCacheRecycler.WEIGHT_OBJECTS_SETTING,                    PageCacheRecycler.TYPE_SETTING,                    PluginsService.MANDATORY_SETTING,                    BootstrapSettings.SECURITY_FILTER_BAD_DEFAULTS_SETTING,                    BootstrapSettings.MEMORY_LOCK_SETTING,                    BootstrapSettings.SYSTEM_CALL_FILTER_SETTING,                    BootstrapSettings.CTRLHANDLER_SETTING,                    KeyStoreWrapper.SEED_SETTING,                    IndexingMemoryController.INDEX_BUFFER_SIZE_SETTING,                    IndexingMemoryController.MIN_INDEX_BUFFER_SIZE_SETTING,                    IndexingMemoryController.MAX_INDEX_BUFFER_SIZE_SETTING,                    IndexingMemoryController.SHARD_INACTIVE_TIME_SETTING,                    IndexingMemoryController.SHARD_MEMORY_INTERVAL_TIME_SETTING,                    ResourceWatcherService.ENABLED,                    ResourceWatcherService.RELOAD_INTERVAL_HIGH,                    ResourceWatcherService.RELOAD_INTERVAL_MEDIUM,                    ResourceWatcherService.RELOAD_INTERVAL_LOW,                    SearchModule.INDICES_MAX_CLAUSE_COUNT_SETTING,                    ThreadPool.ESTIMATED_TIME_INTERVAL_SETTING,                    FastVectorHighlighter.SETTING_TV_HIGHLIGHT_MULTI_VALUE,                    Node.BREAKER_TYPE_KEY,                    OperationRouting.USE_ADAPTIVE_REPLICA_SELECTION_SETTING,                    IndexGraveyard.SETTING_MAX_TOMBSTONES,                    EnableAssignmentDecider.CLUSTER_TASKS_ALLOCATION_ENABLE_SETTING            )));
     

包含setting的结构图如下

                                               <图1>

 

                                            <图2>

　　　　　　　　　　　　    <图3>

2.3 SettingsFilter

/** * A class that allows to filter settings objects by simple regular expression patterns or full settings keys. * It's used for response filtering on the rest layer to for instance filter out sensitive information like access keys. */