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Set up memcached » History » Version 5

Leos Stejskal, 10/15/2021 11:43 AM

1 1 Daniel Lobato Garcia
h1. Set up memcached
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3 4 Ohad Levy
h2. Using a Foreman Plugin (1.2 and newer)
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as of Foreman 1.2, there is now a plugin with auto configures memcache usage, see [[List_of_Plugins]]
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h2. Manual configuration (1.1 and below)
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10 1 Daniel Lobato Garcia
As a Rails 3 application, foreman is fairly easy to connect to memcached. 
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Instead of using memcache-client, we are going to use Dalli, a ruby gem that allows Rails to use your memcached store.
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* Include <pre>gem 'dalli'</pre> on your Gemfile and run *bundle install*. 
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* Open your environment config file, it is in config/environments/*.rb. Let's assume you will want to set memcached as your production cache store. (config/environments/production.rb)
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* Add the following line in the Foreman::Aplication.configure block. <pre>config.cache_store = :dalli_store</pre> 
16 3 Daniel Lobato Garcia
* Reboot your server (nginx, passenger, mongrel, thin..)
17 1 Daniel Lobato Garcia
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+Additional options+
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If you have your own separate cache servers, just add it after the command like this: 
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<pre>
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config.cache_store = :dalli_store, 'cache1.myserver.com', 'cache2.myserver.com'
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</pre>
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 Memcached can be used to manage sessions, just add something like this to your config/initializers/session_store.rb:
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<pre>
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require 'action_dispatch/middleware/session/dalli_store'
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Rails.application.config.session_store :dalli_store, :memcache_server => ['host1', 'host2'], :namespace => 'sessions', :key => '_foundation_session', :expire_after => 20.minutes
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</pre>