diff --git a/src/appStart/StartHelper.tsx b/src/appStart/StartHelper.tsx
index ce3ce5a..b0b33ee 100644
--- a/src/appStart/StartHelper.tsx
+++ b/src/appStart/StartHelper.tsx
@@ -22,6 +22,7 @@ import MyUserManager from '@caj/user/MyUserManager';
 import DBSchemas from '@caj/helper/storage/bdm/schemas';
 import {chatTags, convertDatabaseChat} from '@caj/components/chat/types';
 import {addChatEntity} from '@caj/components/chat/initChatDatabase';
+import {initDatabase} from '@caj/helper/storage/bdm/init';
 
 const AnimationView = animated(View);
 
@@ -48,9 +49,22 @@ function onAppStart() {
           const chat = convertDatabaseChat(entries[i]);
           if (chat === undefined) continue;
 
-          console.log(chat);
+          await initDatabase(DBSchemas.chat, chat.roomId);
 
           addChatEntity(chat);
+
+          if (chat.roomId === 'test') {
+            const chatDBKeys = BigDataManager.databases.chat.keys;
+            for (let i = 0; i < 10; i++) {
+              await BigDataManager.databases.chat.setEntry(
+                {
+                  [chatDBKeys.UserId]: MyUserManager.getSelectedUserId(),
+                  [chatDBKeys.msg]: 'heyho',
+                },
+                chat.roomId,
+              );
+            }
+          }
         }
 
         console.log('finish');
diff --git a/src/caj/components/ProfilePicture.tsx b/src/caj/components/ProfilePicture.tsx
index 4a870ac..021cae9 100644
--- a/src/caj/components/ProfilePicture.tsx
+++ b/src/caj/components/ProfilePicture.tsx
@@ -9,6 +9,7 @@ export function ProfilePicture(props: {size: number; UserId: UserId}) {
   const UserId = props.UserId;
   const ProfilePicture = UserManager.getUserSelectorPicture(UserId);
   const accountName = UserManager.getUserSelectorAccountName(UserId).data;
+  
 
   if (accountName === undefined) {
     return (
diff --git a/src/caj/helper/storage/BigDataManager.ts b/src/caj/helper/storage/BigDataManager.ts
index 459d5af..d41d805 100644
--- a/src/caj/helper/storage/BigDataManager.ts
+++ b/src/caj/helper/storage/BigDataManager.ts
@@ -1,11 +1,11 @@
-import {initDatabase} from './bdm/init';
+import {initDatabases} from './bdm/init';
 import {setEntry} from './bdm/set';
 import {getEntry} from './bdm/get';
 import DBSchemas from './bdm/schemas';
 import {databaseNames, possibleDBKeys} from './bdm/types';
 
 const BigDataManager = {
-  initDatabase,
+  initDatabase: initDatabases,
   setEntry,
   getEntry,
   databases: DBSchemas,
diff --git a/src/caj/helper/storage/bdm/get.ts b/src/caj/helper/storage/bdm/get.ts
index b592a76..0b2e6ff 100644
--- a/src/caj/helper/storage/bdm/get.ts
+++ b/src/caj/helper/storage/bdm/get.ts
@@ -1,5 +1,5 @@
 import {getDatabase} from './getDB';
-import {databaseConf, possibleDBKeys} from './types';
+import {databaseConf, mergeDBName, possibleDBKeys} from './types';
 
 export interface filterParam {
   type: 'name';
@@ -8,9 +8,12 @@ export interface filterParam {
 export const getEntry = async <T2 extends databaseConf<T, any>, T>(
   schema: T2,
   key: possibleDBKeys,
+  suffix?: string,
 ): Promise<null | T> => {
-  const dbName = schema.details.name;
-  const realm = await getDatabase(dbName);
+  const nameObj = {name: schema.details.name, suffix};
+  const dbName = mergeDBName(nameObj);
+
+  const realm = await getDatabase(nameObj);
 
   const val = realm.objectForPrimaryKey<typeof schema.details.properties>(
     dbName,
@@ -23,9 +26,12 @@ export const getEntry = async <T2 extends databaseConf<T, any>, T>(
 export const getAllEntries = async <T2 extends databaseConf<T, any>, T>(
   schema: T2,
   filter?: filterParam,
+  suffix?: string,
 ): Promise<null | T[]> => {
-  const dbName = schema.details.name;
-  const realm = await getDatabase(dbName);
+  const nameObj = {name: schema.details.name, suffix};
+  const dbName = mergeDBName(nameObj);
+
+  const realm = await getDatabase(nameObj);
 
   const val = realm.objects<typeof schema.details.properties>(dbName);
 
diff --git a/src/caj/helper/storage/bdm/get.web.ts b/src/caj/helper/storage/bdm/get.web.ts
index 4fff298..6f57d32 100644
--- a/src/caj/helper/storage/bdm/get.web.ts
+++ b/src/caj/helper/storage/bdm/get.web.ts
@@ -1,13 +1,16 @@
 import {filterParam} from './get';
 import {getDatabase} from './getDB.web';
-import {databaseConf, possibleDBKeys} from './types';
+import {databaseConf, mergeDBName, possibleDBKeys} from './types';
 
 export const getEntry = async <T2 extends databaseConf<T, any>, T>(
   schema: T2,
   key: possibleDBKeys,
+  suffix?: string,
 ): Promise<null | T> => {
-  const dbName = schema.details.name;
-  const db = await getDatabase(dbName);
+  const nameObj = {name: schema.details.name, suffix};
+  const dbName = nameObj.name;
+
+  const db = await getDatabase(nameObj);
 
   const tx = db.transaction(dbName, 'readonly');
   const store = tx.objectStore(dbName);
@@ -20,9 +23,14 @@ export const getEntry = async <T2 extends databaseConf<T, any>, T>(
 export const getAllEntries = async <T2 extends databaseConf<T, any>, T>(
   schema: T2,
   filter?: filterParam,
+  suffix?: string,
 ): Promise<null | T[]> => {
-  const dbName = schema.details.name;
-  const db = await getDatabase(dbName);
+  const nameObj = {name: schema.details.name, suffix};
+  const dbName = nameObj.name;
+
+  console.log(dbName);
+
+  const db = await getDatabase(nameObj);
 
   const tx = db.transaction(dbName, 'readonly');
   const store = tx.objectStore(dbName);
diff --git a/src/caj/helper/storage/bdm/getDB.ts b/src/caj/helper/storage/bdm/getDB.ts
index ed3b0ac..84684c3 100644
--- a/src/caj/helper/storage/bdm/getDB.ts
+++ b/src/caj/helper/storage/bdm/getDB.ts
@@ -2,7 +2,12 @@ import {timestamp} from '@caj/configs/types';
 import MyUserManager from '@caj/user/MyUserManager';
 import Realm from 'realm';
 import {getKey} from './encryption';
-import {databaseConf, databaseNames} from './types';
+import {
+  databaseConf,
+  databaseNames,
+  databaseNameSuffix,
+  mergeDBName,
+} from './types';
 
 import RNFS from 'react-native-fs';
 import {databaseConfType} from './schemas';
@@ -12,7 +17,7 @@ const closeTimeout = 5; // in seconds // when DB read/writes is too long in idle
 type DBType = Realm;
 
 export interface DBObject {
-  name: databaseNames;
+  name: string;
   schema: databaseConfType;
   db: DBType | undefined;
   lastUsedTimestamp?: timestamp; // when timeout is undefined then db is closed
@@ -55,9 +60,14 @@ export function closeAllDatabases() {
 
 export async function openMyDatabase(
   schema: databaseConfType,
+  nameObj: databaseNameSuffix,
 ): Promise<DBType> {
   const folderPath = MyUserManager.getSelectedUserId();
-  const path = folderPath + '/' + schema.filePath;
+  const path =
+    folderPath +
+    '/' +
+    schema.filePath +
+    (nameObj.suffix !== undefined ? '_' + nameObj.suffix : '');
 
   const folderExists = await RNFS.exists(
     RNFS.DocumentDirectoryPath + '/' + folderPath,
@@ -76,17 +86,19 @@ export async function openMyDatabase(
 }
 
 export async function getDatabase(
-  name: databaseNames,
+  _name: databaseNameSuffix,
   init?: boolean,
 ): Promise<DBType> {
+  const name = mergeDBName(_name);
   let dbObj = databases[name];
+
   if (dbObj !== undefined) {
     if (dbObj.lastUsedTimestamp !== undefined && dbObj.db !== undefined) {
       dbObj.lastUsedTimestamp = getTime();
       return dbObj.db;
     } else {
       dbObj.lastUsedTimestamp = undefined;
-      const db = await openMyDatabase(dbObj.schema);
+      const db = await openMyDatabase(dbObj.schema, _name);
       dbObj.lastUsedTimestamp = getTime();
       dbObj.db = db;
       return db;
diff --git a/src/caj/helper/storage/bdm/getDB.web.ts b/src/caj/helper/storage/bdm/getDB.web.ts
index 8337d93..5ef7a08 100644
--- a/src/caj/helper/storage/bdm/getDB.web.ts
+++ b/src/caj/helper/storage/bdm/getDB.web.ts
@@ -2,7 +2,12 @@ import {timestamp} from '@caj/configs/types';
 import MyUserManager from '@caj/user/MyUserManager';
 import {IDBPDatabase, openDB} from 'idb';
 import {databaseConfType} from './schemas';
-import {databaseConf, databaseNames} from './types';
+import {
+  databaseConf,
+  databaseNames,
+  databaseNameSuffix,
+  mergeDBName,
+} from './types';
 
 const closeTimeout = 5; // in seconds // when DB read/writes is too long in idle it will be closed
 
@@ -52,15 +57,11 @@ export function closeAllDatabases() {
 
 export async function openMyDatabase(
   schema: databaseConfType,
-  init?: boolean,
+  nameObj: databaseNameSuffix,
 ): Promise<DBType> {
-  const db = await openDB(
-    schema.details.name + '-' + MyUserManager.getSelectedUserId(),
-    schema.version,
-    {
-      upgrade: schema.migration(),
-    },
-  );
+  const db = await openDB(mergeDBName(nameObj, 'web'), schema.version, {
+    upgrade: schema.migration(),
+  });
 
   /*if (init === true) {
     const UserId = MyUserManager.getSelectedUserId();
@@ -73,10 +74,12 @@ export async function openMyDatabase(
 }
 
 export async function getDatabase(
-  name: databaseNames,
+  _name: databaseNameSuffix,
   init?: boolean,
 ): Promise<DBType> {
+  const name = mergeDBName(_name);
   let dbObj = databases[name];
+
   if (dbObj !== undefined) {
     if (dbObj.lastUsedTimestamp !== undefined && dbObj.db !== undefined) {
       dbObj.lastUsedTimestamp = getTime();
@@ -85,7 +88,7 @@ export async function getDatabase(
         dbObj.db.close();
 
         dbObj.lastUsedTimestamp = undefined;
-        const db = await openMyDatabase(dbObj.schema, init);
+        const db = await openMyDatabase(dbObj.schema /*, init*/, _name);
         dbObj.lastUsedTimestamp = getTime();
 
         dbObj.db = db;
@@ -96,7 +99,7 @@ export async function getDatabase(
       }
     } else {
       dbObj.lastUsedTimestamp = undefined;
-      const db = await openMyDatabase(dbObj.schema, init);
+      const db = await openMyDatabase(dbObj.schema /*, init*/, _name);
       dbObj.lastUsedTimestamp = getTime();
       dbObj.db = db;
       return db;
diff --git a/src/caj/helper/storage/bdm/init.ts b/src/caj/helper/storage/bdm/init.ts
index 0c2f3d3..4b1a6b4 100644
--- a/src/caj/helper/storage/bdm/init.ts
+++ b/src/caj/helper/storage/bdm/init.ts
@@ -1,25 +1,42 @@
 import {openDB, deleteDB, wrap, unwrap} from 'idb';
 import {closeAllDatabases, databases, DBObject, getDatabase} from './getDB';
-import DBSchemas from './schemas';
-import {databaseConf} from './types';
+import DBSchemas, {SkipDBSchemas} from './schemas';
+import {databaseConf, databaseNameSuffix, mergeDBName} from './types';
 
-export const initDatabase = (): Promise<void> => {
+export const initDatabases = (): Promise<void> => {
   return new Promise(async (resolve, reject) => {
     closeAllDatabases();
 
     for (const key in DBSchemas) {
       const schema = DBSchemas[key as keyof typeof DBSchemas];
+      const name = schema.details.name;
 
-      let dbObj: DBObject = {
-        schema: schema,
-        name: schema.details.name,
-        db: undefined,
-      };
+      if (SkipDBSchemas.includes(name)) continue;
 
-      databases[dbObj.name] = dbObj;
-
-      await getDatabase(dbObj.name, true); // init Database
+      await initDatabase(schema);
     }
     resolve();
   });
 };
+
+export const initDatabase = async (
+  schema: typeof DBSchemas[keyof typeof DBSchemas],
+  fileSuffix?: string,
+): Promise<string> => {
+  const _nameObj: databaseNameSuffix = {
+    name: schema.details.name,
+    suffix: fileSuffix,
+  };
+  const name = mergeDBName(_nameObj);
+
+  let dbObj: DBObject = {
+    schema: schema,
+    name,
+    db: undefined,
+  };
+
+  databases[name] = dbObj;
+
+  await getDatabase(_nameObj, true); // init Database
+  return name;
+};
diff --git a/src/caj/helper/storage/bdm/schemas.ts b/src/caj/helper/storage/bdm/schemas.ts
index f8a1bc1..d836b2d 100644
--- a/src/caj/helper/storage/bdm/schemas.ts
+++ b/src/caj/helper/storage/bdm/schemas.ts
@@ -3,5 +3,7 @@ import users from './schemas/users';
 import chatRoomInfos from './schemas/chatRoomInfos';
 
 const DBSchemas = {users, chat, chatRoomInfos};
-export default DBSchemas;
+export const SkipDBSchemas = [chat.details.name];
+
 export type databaseConfType = typeof DBSchemas[keyof typeof DBSchemas];
+export default DBSchemas;
diff --git a/src/caj/helper/storage/bdm/schemas/chat.ts b/src/caj/helper/storage/bdm/schemas/chat.ts
index cc855ca..0d2161a 100644
--- a/src/caj/helper/storage/bdm/schemas/chat.ts
+++ b/src/caj/helper/storage/bdm/schemas/chat.ts
@@ -29,22 +29,25 @@ const thisSchema: databaseConf<typeof propsDefault, typeof keys> = {
   migration: () => {
     return DBMigration[name](thisSchema);
   },
-  setEntry: (val: typeof thisSchema.defaultProps) => {
+  setEntry: (val: typeof thisSchema.defaultProps, suffix?: string) => {
     return setEntry<typeof thisSchema, typeof thisSchema.defaultProps>(
       thisSchema,
       val,
+      suffix,
     );
   },
-  getEntry: (key: possibleDBKeys) => {
+  getEntry: (key: possibleDBKeys, suffix?: string) => {
     return getEntry<typeof thisSchema, typeof thisSchema.defaultProps>(
       thisSchema,
       key,
+      suffix,
     );
   },
-  getAllEntries: (filter?: filterParam) => {
+  getAllEntries: (filter?: filterParam, suffix?: string) => {
     return getAllEntries<typeof thisSchema, typeof thisSchema.defaultProps>(
       thisSchema,
       filter,
+      suffix,
     );
   },
   defaultProps: propsDefault,
diff --git a/src/caj/helper/storage/bdm/schemas/chatRoomInfos.ts b/src/caj/helper/storage/bdm/schemas/chatRoomInfos.ts
index f45f912..b7b2b19 100644
--- a/src/caj/helper/storage/bdm/schemas/chatRoomInfos.ts
+++ b/src/caj/helper/storage/bdm/schemas/chatRoomInfos.ts
@@ -41,22 +41,25 @@ const thisSchema: databaseConf<typeof propsDefault, typeof keys> = {
   migration: () => {
     return DBMigration[name](thisSchema);
   },
-  setEntry: (val: typeof thisSchema.defaultProps) => {
+  setEntry: (val: typeof thisSchema.defaultProps, suffix?: string) => {
     return setEntry<typeof thisSchema, typeof thisSchema.defaultProps>(
       thisSchema,
       val,
+      suffix,
     );
   },
-  getEntry: (key: possibleDBKeys) => {
+  getEntry: (key: possibleDBKeys, suffix?: string) => {
     return getEntry<typeof thisSchema, typeof thisSchema.defaultProps>(
       thisSchema,
       key,
+      suffix,
     );
   },
-  getAllEntries: (filter?: filterParam) => {
+  getAllEntries: (filter?: filterParam, suffix?: string) => {
     return getAllEntries<typeof thisSchema, typeof thisSchema.defaultProps>(
       thisSchema,
       filter,
+      suffix,
     );
   },
   defaultProps: propsDefault,
diff --git a/src/caj/helper/storage/bdm/schemas/users.ts b/src/caj/helper/storage/bdm/schemas/users.ts
index a81f708..e1a49a0 100644
--- a/src/caj/helper/storage/bdm/schemas/users.ts
+++ b/src/caj/helper/storage/bdm/schemas/users.ts
@@ -61,22 +61,25 @@ const thisSchema: databaseConf<typeof propsDefault, typeof keys> = {
   migration: () => {
     return DBMigration[name](thisSchema);
   },
-  setEntry: (val: typeof thisSchema.defaultProps) => {
+  setEntry: (val: typeof thisSchema.defaultProps, suffix?: string) => {
     return setEntry<typeof thisSchema, typeof thisSchema.defaultProps>(
       thisSchema,
       val,
+      suffix,
     );
   },
-  getEntry: (key: possibleDBKeys) => {
+  getEntry: (key: possibleDBKeys, suffix?: string) => {
     return getEntry<typeof thisSchema, typeof thisSchema.defaultProps>(
       thisSchema,
       key,
+      suffix,
     );
   },
-  getAllEntries: (filter?: filterParam) => {
+  getAllEntries: (filter?: filterParam, suffix?: string) => {
     return getAllEntries<typeof thisSchema, typeof thisSchema.defaultProps>(
       thisSchema,
       filter,
+      suffix,
     );
   },
   defaultProps: propsDefault,
diff --git a/src/caj/helper/storage/bdm/set.ts b/src/caj/helper/storage/bdm/set.ts
index f1ba8dd..b9e0319 100644
--- a/src/caj/helper/storage/bdm/set.ts
+++ b/src/caj/helper/storage/bdm/set.ts
@@ -1,12 +1,15 @@
 import {getDatabase} from './getDB';
-import {databaseConf} from './types';
+import {databaseConf, mergeDBName} from './types';
 
 export const setEntry = async <T2 extends databaseConf<T, any>, T>(
   schema: T2,
   value: T,
+  suffix?: string,
 ) => {
-  const dbName = schema.details.name;
-  const realm = await getDatabase(dbName);
+  const nameObj = {name: schema.details.name, suffix};
+  const dbName = mergeDBName(nameObj);
+
+  const realm = await getDatabase(nameObj);
 
   realm.write(() => {
     realm.create(dbName, value as any, Realm.UpdateMode.Modified);
diff --git a/src/caj/helper/storage/bdm/set.web.ts b/src/caj/helper/storage/bdm/set.web.ts
index b0c9373..cdce4eb 100644
--- a/src/caj/helper/storage/bdm/set.web.ts
+++ b/src/caj/helper/storage/bdm/set.web.ts
@@ -1,12 +1,15 @@
 import {getDatabase} from './getDB.web';
-import {databaseConf} from './types';
+import {databaseConf, mergeDBName} from './types';
 
 export const setEntry = async <T2 extends databaseConf<T, any>, T>(
   schema: T2,
   value: T,
+  suffix?: string,
 ) => {
-  const dbName = schema.details.name;
-  const db = await getDatabase(dbName);
+  const nameObj = {name: schema.details.name, suffix};
+  const dbName = nameObj.name;
+
+  const db = await getDatabase(nameObj);
 
   const tx = db.transaction(dbName, 'readwrite');
   const store = tx.objectStore(dbName);
diff --git a/src/caj/helper/storage/bdm/types.ts b/src/caj/helper/storage/bdm/types.ts
index 7a0eb49..aff0136 100644
--- a/src/caj/helper/storage/bdm/types.ts
+++ b/src/caj/helper/storage/bdm/types.ts
@@ -1,3 +1,4 @@
+import MyUserManager from '@caj/user/MyUserManager';
 import {filterParam} from './get';
 
 export type databaseNames = 'users' | 'chat' | 'chatRoomInfos';
@@ -8,9 +9,12 @@ export interface databaseConf<props, enums> {
   version: number;
   migration?: any;
   keys: enums;
-  getEntry: (key: possibleDBKeys) => Promise<props | null>;
-  getAllEntries: (filter?: filterParam) => Promise<props[] | null>;
-  setEntry: (val: props) => Promise<void>;
+  getEntry: (key: possibleDBKeys, suffix?: string) => Promise<props | null>;
+  getAllEntries: (
+    filter?: filterParam,
+    suffix?: string,
+  ) => Promise<props[] | null>;
+  setEntry: (val: props, suffix?: string) => Promise<void>;
   defaultProps: props;
   details: {
     name: databaseNames;
@@ -18,3 +22,23 @@ export interface databaseConf<props, enums> {
     primaryKey: keyof props;
   };
 }
+
+export interface databaseNameSuffix {
+  name: databaseNames;
+  suffix?: string;
+}
+
+export function mergeDBName(nameObj: databaseNameSuffix, web?: 'web'): string {
+  if (web === 'web') {
+    return nameObj.suffix === undefined
+      ? nameObj.name + '-' + MyUserManager.getSelectedUserId()
+      : nameObj.name +
+          '-' +
+          MyUserManager.getSelectedUserId() +
+          ('_' + nameObj.suffix);
+  }
+
+  return nameObj.suffix === undefined
+    ? nameObj.name
+    : nameObj.name + nameObj.suffix;
+}
diff --git a/src/caj/user/UserManager.ts b/src/caj/user/UserManager.ts
index 6137442..2bd3fe5 100644
--- a/src/caj/user/UserManager.ts
+++ b/src/caj/user/UserManager.ts
@@ -200,7 +200,7 @@ async function refreshUsers() {
   }
 }
 
-setInterval(refreshUsers, 1300);
+setInterval(refreshUsers, 500);
 
 function addUserToGetQueue(UserId: UserId, param: GetParam) {
   if (getUserList[UserId] === undefined) {