[Ubuntu] 安裝與設定 memcached in rails

1.安裝memchached
sudo apt-get install memcached

2. Restart memcached
sudo /etc/init.d/memcached restart

3.安裝gem dalli
sudo gem install dalli

4.編輯 config/environments/development.rb

# Memcached
  config.perform_caching = true
  config.action_controller.perform_caching = true
  config.cache_store = :dalli_store, 'localhost:11211'

5. Vim Gemfile file to insert :
gem 'dalli'

測試 railc c

Rails.cache.read('foo')  =>nil
Rails.cache.write('foo','test') => true
Rails.cache.read('foo')  =>　'test'
可以用 fetch 的方式 
Rails.cache.fetch('part') do
       'xxxxx'
end

查看mencache stats

echo stats | nc 127.0.0.1 11211

即時監看 

watch "echo stats | nc 127.0.0.1 11211"