diff --git a/src/main/java/org/codelibs/fess/Constants.java b/src/main/java/org/codelibs/fess/Constants.java
index c459248e6..bccfb9759 100644
--- a/src/main/java/org/codelibs/fess/Constants.java
+++ b/src/main/java/org/codelibs/fess/Constants.java
@@ -87,6 +87,8 @@ public class Constants extends CoreLibConstants {
 
     public static final String CRAWLING_USER_AGENT_SUFFIX = "; +http://fess.codelibs.org/bot.html)";
 
+    public static final String DOCUMENT_INDEX_SUFFIX_PATTERN = "yyyyMMddHHmmssSSS";
+
     // fess properties
     public static final String USER_INFO_PROPERTY = "user.info";
 
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/maintenance/AdminMaintenanceAction.java b/src/main/java/org/codelibs/fess/app/web/admin/maintenance/AdminMaintenanceAction.java
index 60c36f809..0223edb73 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/maintenance/AdminMaintenanceAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/maintenance/AdminMaintenanceAction.java
@@ -300,7 +300,7 @@ protected boolean startReindex(final boolean replaceAliases, final boolean reset
             final String autoExpandReplicas) {
         final String docIndex = "fess";
         final String fromIndex = fessConfig.getIndexDocumentUpdateIndex();
-        final String toIndex = docIndex + "." + new SimpleDateFormat("yyyyMMddHHmm").format(new Date());
+        final String toIndex = docIndex + "." + new SimpleDateFormat(Constants.DOCUMENT_INDEX_SUFFIX_PATTERN).format(new Date());
         if (searchEngineClient.createIndex(docIndex, toIndex, numberOfShards, autoExpandReplicas, resetDictionaries)) {
             searchEngineClient.admin().cluster().prepareHealth(toIndex).setWaitForYellowStatus().execute(ActionListener.wrap(response -> {
                 searchEngineClient.addMapping(docIndex, "doc", toIndex);
diff --git a/src/main/java/org/codelibs/fess/es/client/SearchEngineClient.java b/src/main/java/org/codelibs/fess/es/client/SearchEngineClient.java
index ec9b1c75b..75ee350cd 100644
--- a/src/main/java/org/codelibs/fess/es/client/SearchEngineClient.java
+++ b/src/main/java/org/codelibs/fess/es/client/SearchEngineClient.java
@@ -184,6 +184,8 @@ public class SearchEngineClient implements Client {
 
     private static final Logger logger = LogManager.getLogger(SearchEngineClient.class);
 
+    private static final String DOC_INDEX = "fess";
+
     private static final String LOG_INDEX_PREFIX = "fess_log";
 
     private static final String USER_INDEX_PREFIX = "fess_user";
@@ -268,6 +270,18 @@ public void open() {
         }
         final FessConfig fessConfig = ComponentUtil.getFessConfig();
 
+        if (StringUtil.isNotBlank(fessConfig.getIndexDictionaryPrefix())) {
+            String dictionaryPath = System.getProperty("fess.dictionary.path", StringUtil.EMPTY);
+            if (StringUtil.isBlank(dictionaryPath)) {
+                System.setProperty("fess.dictionary.path", fessConfig.getIndexDictionaryPrefix() + "/");
+            } else {
+                if (!dictionaryPath.endsWith("/")) {
+                    dictionaryPath = dictionaryPath + "/";
+                }
+                System.setProperty("fess.dictionary.path", dictionaryPath + fessConfig.getIndexDictionaryPrefix() + "/");
+            }
+        }
+
         String httpAddress = SystemUtil.getSearchEngineHttpAddress();
         if (StringUtil.isBlank(httpAddress) && (runner == null)) {
             switch (fessConfig.getFesenType()) {
@@ -322,7 +336,7 @@ public void open() {
                 final String configIndex = values[0];
                 final String configType = values[1];
 
-                final boolean isFessIndex = "fess".equals(configIndex);
+                final boolean isFessIndex = DOC_INDEX.equals(configIndex);
                 final String indexName;
                 if (isFessIndex) {
                     final boolean exists = existsIndex(fessConfig.getIndexDocumentUpdateIndex());
@@ -349,10 +363,10 @@ public void open() {
                         indexName = configIndex.replaceFirst(Pattern.quote(CONFIG_INDEX_PREFIX), name);
                     } else if (configIndex.startsWith(USER_INDEX_PREFIX)) {
                         final String name = fessConfig.getIndexUserIndex();
-                        indexName = configIndex.replaceFirst(Pattern.quote(CONFIG_INDEX_PREFIX), name);
+                        indexName = configIndex.replaceFirst(Pattern.quote(USER_INDEX_PREFIX), name);
                     } else if (configIndex.startsWith(LOG_INDEX_PREFIX)) {
                         final String name = fessConfig.getIndexLogIndex();
-                        indexName = configIndex.replaceFirst(Pattern.quote(CONFIG_INDEX_PREFIX), name);
+                        indexName = configIndex.replaceFirst(Pattern.quote(LOG_INDEX_PREFIX), name);
                     } else {
                         throw new FessSystemException("Unknown config index: " + configIndex);
                     }
@@ -553,7 +567,7 @@ public void addMapping(final String index, final String docType, final String in
             final String mappingFile = getResourcePath(indexConfigPath, fessConfig.getFesenType(), "/" + index + "/" + docType + ".json");
             try {
                 source = FileUtil.readUTF8(mappingFile);
-                if ("fess".equals(index)) {
+                if (DOC_INDEX.equals(index)) {
                     for (final UnaryOperator<String> rule : docMappingRewriteRuleList) {
                         source = rule.apply(source);
                     }
@@ -624,7 +638,23 @@ protected void createAlias(final String index, final String createdIndexName) {
             final File aliasConfigDir = ResourceUtil.getResourceAsFile(aliasConfigDirPath);
             if (aliasConfigDir.isDirectory()) {
                 stream(aliasConfigDir.listFiles((dir, name) -> name.endsWith(".json"))).of(stream -> stream.forEach(f -> {
-                    final String aliasName = f.getName().replaceFirst(".json$", "");
+                    String aliasName = f.getName().replaceFirst(".json$", "");
+                    if (index.equals(DOC_INDEX)) {
+                        if ("fess.search".equals(aliasName)) {
+                            aliasName = fessConfig.getIndexDocumentSearchIndex();
+                        } else if ("fess.update".equals(aliasName)) {
+                            aliasName = fessConfig.getIndexDocumentUpdateIndex();
+                        }
+                    } else if (index.startsWith(CONFIG_INDEX_PREFIX)) {
+                        final String name = fessConfig.getIndexConfigIndex();
+                        aliasName = aliasName.replaceFirst(Pattern.quote(CONFIG_INDEX_PREFIX), name);
+                    } else if (index.startsWith(USER_INDEX_PREFIX)) {
+                        final String name = fessConfig.getIndexUserIndex();
+                        aliasName = aliasName.replaceFirst(Pattern.quote(USER_INDEX_PREFIX), name);
+                    } else if (index.startsWith(LOG_INDEX_PREFIX)) {
+                        final String name = fessConfig.getIndexLogIndex();
+                        aliasName = aliasName.replaceFirst(Pattern.quote(LOG_INDEX_PREFIX), name);
+                    }
                     String source = FileUtil.readUTF8(f);
                     if ("{}".equals(source.trim())) {
                         source = null;
@@ -646,13 +676,20 @@ protected void createAlias(final String index, final String createdIndexName) {
     }
 
     protected void sendConfigFiles(final String index) {
+        final FessConfig fessConfig = ComponentUtil.getFessConfig();
         configListMap.getOrDefault(index, Collections.emptyList()).forEach(path -> {
             String source = null;
             final String filePath = indexConfigPath + "/" + index + "/" + path;
+            final String dictionaryPath;
+            if (StringUtil.isNotBlank(fessConfig.getIndexDictionaryPrefix())) {
+                dictionaryPath = fessConfig.getIndexDictionaryPrefix() + "/" + path;
+            } else {
+                dictionaryPath = path;
+            }
             try {
                 source = FileUtil.readUTF8(filePath);
                 try (CurlResponse response =
-                        ComponentUtil.getCurlHelper().post("/_configsync/file").param("path", path).body(source).execute()) {
+                        ComponentUtil.getCurlHelper().post("/_configsync/file").param("path", dictionaryPath).body(source).execute()) {
                     if (response.getHttpStatusCode() == 200) {
                         logger.info("Register {} to {}", path, index);
                     } else if (response.getContentException() != null) {
@@ -703,14 +740,20 @@ public void flushConfigFiles(final Runnable callback) {
     }
 
     protected String generateNewIndexName(final String configIndex) {
-        return configIndex + "." + new SimpleDateFormat("yyyyMMdd").format(new Date());
+        return configIndex + "." + new SimpleDateFormat(Constants.DOCUMENT_INDEX_SUFFIX_PATTERN).format(new Date());
     }
 
     protected void insertBulkData(final FessConfig fessConfig, final String configIndex, final String dataPath) {
         try {
             final BulkRequestBuilder builder = client.prepareBulk();
             final ObjectMapper mapper = new ObjectMapper();
-            Arrays.stream(FileUtil.readUTF8(dataPath).split("\n")).reduce((prev, line) -> {
+            final String userIndex = fessConfig.getIndexUserIndex() + ".user";
+            Arrays.stream(FileUtil.readUTF8(dataPath).split("\n")).map(line -> {
+                return line//
+                        .replace("\"_index\":\"fess_config.", "\"_index\":\"" + fessConfig.getIndexConfigIndex() + ".")//
+                        .replace("\"_index\":\"fess_user.", "\"_index\":\"" + fessConfig.getIndexUserIndex() + ".")//
+                        .replace("\"_index\":\"fess_log.", "\"_index\":\"" + fessConfig.getIndexLogIndex() + ".");
+            }).reduce((prev, line) -> {
                 try {
                     if (StringUtil.isBlank(prev)) {
                         final Map<String, Map<String, String>> result =
@@ -728,7 +771,7 @@ protected void insertBulkData(final FessConfig fessConfig, final String configIn
                                 });
                         if (result.containsKey("index")) {
                             String source = line;
-                            if ("fess_user.user".equals(configIndex)) {
+                            if (userIndex.equals(configIndex)) {
                                 source = source.replace("${fess.index.initial_password}", ComponentUtil.getComponent(FessLoginAssist.class)
                                         .encryptPassword(fessConfig.getIndexUserInitialPassword()));
                             }
diff --git a/src/main/java/org/codelibs/fess/helper/SuggestHelper.java b/src/main/java/org/codelibs/fess/helper/SuggestHelper.java
index 945efcb3a..1d755f139 100644
--- a/src/main/java/org/codelibs/fess/helper/SuggestHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/SuggestHelper.java
@@ -108,6 +108,7 @@ public void init() {
         settingsBuilder.indexTimeout(fessConfig.getIndexIndexTimeout());
         settingsBuilder.indicesTimeout(fessConfig.getIndexIndicesTimeout());
         settingsBuilder.searchTimeout(fessConfig.getIndexSearchTimeout());
+        settingsBuilder.setSettingsIndexName(fessConfig.getIndexDocumentSuggestIndex() + "_suggest");
         suggester = Suggester.builder().settings(settingsBuilder).build(searchEngineClient, fessConfig.getIndexDocumentSuggestIndex());
         if (ComponentUtil.hasPopularWordHelper()) {
             popularWordHelper = ComponentUtil.getPopularWordHelper();
diff --git a/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java b/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java
index 7646ea337..8a8cb63d9 100644
--- a/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java
+++ b/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java
@@ -718,6 +718,9 @@ public interface FessConfig extends FessEnv, org.codelibs.fess.mylasta.direction
     /** The key of the configuration. e.g. fess_log */
     String INDEX_LOG_INDEX = "index.log.index";
 
+    /** The key of the configuration. e.g.  */
+    String INDEX_DICTIONARY_PREFIX = "index.dictionary.prefix";
+
     /** The key of the configuration. e.g. lang,role,label,anchor,virtual_host */
     String INDEX_ADMIN_ARRAY_FIELDS = "index.admin.array.fields";
 
@@ -4067,6 +4070,21 @@ public interface FessConfig extends FessEnv, org.codelibs.fess.mylasta.direction
      */
     String getIndexLogIndex();
 
+    /**
+     * Get the value for the key 'index.dictionary.prefix'. <br>
+     * The value is, e.g.  <br>
+     * @return The value of found property. (NotNull: if not found, exception but basically no way)
+     */
+    String getIndexDictionaryPrefix();
+
+    /**
+     * Get the value for the key 'index.dictionary.prefix' as {@link Integer}. <br>
+     * The value is, e.g.  <br>
+     * @return The value of found property. (NotNull: if not found, exception but basically no way)
+     * @throws NumberFormatException When the property is not integer.
+     */
+    Integer getIndexDictionaryPrefixAsInteger();
+
     /**
      * Get the value for the key 'index.admin.array.fields'. <br>
      * The value is, e.g. lang,role,label,anchor,virtual_host <br>
@@ -8983,6 +9001,14 @@ public String getIndexLogIndex() {
             return get(FessConfig.INDEX_LOG_INDEX);
         }
 
+        public String getIndexDictionaryPrefix() {
+            return get(FessConfig.INDEX_DICTIONARY_PREFIX);
+        }
+
+        public Integer getIndexDictionaryPrefixAsInteger() {
+            return getAsInteger(FessConfig.INDEX_DICTIONARY_PREFIX);
+        }
+
         public String getIndexAdminArrayFields() {
             return get(FessConfig.INDEX_ADMIN_ARRAY_FIELDS);
         }
@@ -11178,6 +11204,7 @@ protected java.util.Map<String, String> prepareGeneratedDefaultMap() {
             defaultMap.put(FessConfig.INDEX_CONFIG_INDEX, "fess_config");
             defaultMap.put(FessConfig.INDEX_USER_INDEX, "fess_user");
             defaultMap.put(FessConfig.INDEX_LOG_INDEX, "fess_log");
+            defaultMap.put(FessConfig.INDEX_DICTIONARY_PREFIX, "");
             defaultMap.put(FessConfig.INDEX_ADMIN_ARRAY_FIELDS, "lang,role,label,anchor,virtual_host");
             defaultMap.put(FessConfig.INDEX_ADMIN_DATE_FIELDS, "expires,created,timestamp,last_modified");
             defaultMap.put(FessConfig.INDEX_ADMIN_INTEGER_FIELDS, "");
diff --git a/src/main/resources/fess_config.properties b/src/main/resources/fess_config.properties
index b537c01c2..d16dfe2cd 100644
--- a/src/main/resources/fess_config.properties
+++ b/src/main/resources/fess_config.properties
@@ -354,6 +354,7 @@ index.document.crawler.filter.number_of_replicas=1
 index.config.index=fess_config
 index.user.index=fess_user
 index.log.index=fess_log
+index.dictionary.prefix=
 
 # doc management
 index.admin.array.fields=lang,role,label,anchor,virtual_host