create local.settings.php for settings up mongodb by drupal

mongo.settings.php

<?php
#MongoDB
$conf['mongodb_connections'] = array(
     'default' => array(                             // Connection name/alias
       'host' => 'localhost',                       // Omit USER:PASS@ if Mongo isn't configured to use authentication.
       'db' => 'YOURDATABASENAME'                   // Database name. Make something up, mongodb will automatically create the database.
      ),
   );
  
  
      include_once('./includes/cache.inc');

   # -- Configure Cache
   $conf['cache_backends'][] = 'sites/SITENAME/modules/mongodb/mongodb_cache/mongodb_cache.inc';
   $conf['cache_class_cache'] = 'DrupalMongoDBCache';
   $conf['cache_class_cache_bootstrap'] = 'DrupalMongoDBCache';
   $conf['cache_default_class'] = 'DrupalMongoDBCache';

   # -- Don't touch SQL if in Cache
   $conf['page_cache_without_database'] = TRUE;
   $conf['page_cache_invoke_hooks'] = FALSE;
   
   # Session Caching
   $conf['session_inc'] = 'sites/SITENAME/modules/mongodb/mongodb_session/mongodb_session.inc';
   $conf['cache_session'] = 'DrupalMongoDBCache';

   # Field Storage
   $conf['field_storage_default'] = 'mongodb_field_storage';
   
   # Message Queue 
     $conf['queue_default_class'] = 'MongoDBQueue';
?>