diff --git a/.gitignore b/.gitignore
index a6ee997aa..96788ad9a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@
 *.swp
 /config/database.yml
 /config/configuration.yml
+/config/additional_environment.rb
 /files/*
 /log/*
 /public/tmp/*
diff --git a/Gemfile b/Gemfile
index 679e0a5b2..d5fe6c581 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,6 +6,7 @@ unless RUBY_PLATFORM =~ /w32/
   gem 'iconv'
 end
 
+gem 'redis-rails'
 gem 'rubyzip'
 gem 'delayed_job_active_record'#, :group => :production
 gem 'daemons'
diff --git a/config/additional_environment.rb b/config/additional_environment.rb
deleted file mode 100644
index 6654da90f..000000000
--- a/config/additional_environment.rb
+++ /dev/null
@@ -1,10 +0,0 @@
-# Copy this file to additional_environment.rb and add any statements
-# that need to be passed to the Rails::Initializer.  `config` is
-# available in this context.
-#
-# Example:
-#
-#   config.log_level = :debug
-#   ...
-#
-#config.relative_url_root = '/socialforge'
diff --git a/config/application.rb b/config/application.rb
index 05160d03e..57ae436cb 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -67,8 +67,6 @@ module RedmineApp
     # Do not include all helpers
     config.action_controller.include_all_helpers = false
 
-    config.session_store :cookie_store, :key => '_redmine_session'
-
     if File.exists?(File.join(File.dirname(__FILE__), 'additional_environment.rb'))
       instance_eval File.read(File.join(File.dirname(__FILE__), 'additional_environment.rb'))
     end
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 160e0b8b0..63931fa33 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -19,7 +19,12 @@ RedmineApp::Application.configure do
   # Full error reports are disabled and caching is turned on
   config.logger = Logger.new('log/production.log', 'daily',1048576) # daily, weekly or monthly
   config.action_controller.perform_caching = true
-  config.cache_store = :file_store,  "#{Rails.root }/files/cache_store/"
+
+  # to additional_environment.rb
+  # config.cache_store = :file_store,  "#{Rails.root }/files/cache_store/"
+  # config.cache_store = :redis_store, 'redis://localhost:6379/0/cache', { expires_in: 90.minutes  }
+  #
+ 
   # Enable serving of images, stylesheets, and javascripts from an asset server
   # config.action_controller.asset_host                  = "http://assets.example.com"