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POdalli session store
 

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    <p>I have been googling for a long time and haven't find a solution yet. I am using Rails 3.2 and the Dalli gem with memcached 1.4.14.</p> <p>I would like to use Dalli/Memcached as the session store but I dont know how to do that. Now, Dalli cache works like a classic cache but not the session cache. I created a new rails app, added Dalli to the Gemfile :</p> <pre><code>gem 'dalli' </code></pre> <p>In development and production environments I set Dalli as the cache store:</p> <pre><code>config.cache_store = :dalli_store </code></pre> <p>This is the content of <code>initializers/session_store.rb</code>:</p> <pre><code>require 'action_dispatch/middleware/session/dalli_store' Rails.application.config.session_store :dalli_store, :memcache_server =&gt; ['127.0.0.1'], :namespace =&gt; 'sessions', :key =&gt; '_session', :expire_after =&gt; 30.minutes </code></pre> <p>I create a <code>Myooo</code> model in which I added to methods to list and create instances:</p> <pre><code>def self.index_c a = Rails.cache.read(:myooo_index) if a.nil? puts '---&gt;&gt;&gt; load again' a = Rails.cache.write(:myooo_index, Myooo.all, expires_in: 5.seconds) else puts '---&gt;&gt;&gt; using cache' end return Rails.cache.read(:myooo_index) end def self.create_c(myooo_object) a = Rails.cache.read(:myooo_create) if a.nil? a = Rails.cache.write(:myooo_create, myooo_object, expires_in: 10.minutes) end return Rails.cache.read(:myooo_create) end </code></pre> <p>In the controller, I just try to reach the cache. In the index action:</p> <pre><code>@myooos = Myooo.index_c </code></pre> <p>and in the create action:</p> <pre><code>@myooo = Myooo.new(params[:myooo]) Myooo.create_c(@myooo) </code></pre> <p>I know it's a strange script but i need to understand how I'm supposed to deal with the session cache and use it in a real project. I spent a lot of time in server outline console, made many puts trying to understand what's going on. Cache seems to act like a classic cache, not a session cache.</p> <p>I would be glad to be helped (ps: happy new year) :)</p>
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    1. COBy session store you should understand the store used to persist the data corresponding to the users HTTP sessions. Except in your initializer, nothing in the code you shown relates to the HTTP session. Could you clarify what you are trying to achieve ?
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    2. COSimply use `session` to store data into the user's session (e.g. `session[:user_profile]=@profile`). If you need to cache large amounts of data you'd rather identify what your actual performance issues are before choosing a caching strategy. Rails come with [several builtin options](http://guides.rubyonrails.org/caching_with_rails.html) for caching. In your case partial caching coupled with [key-based](http://37signals.com/svn/posts/3113-how-key-based-cache-expiration-works#extended) expiration strategy (Memcached LRU eviction) could be worth considering.
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    3. COthanks for links and help. i was thinking to solve it as you are giving me advice session[:sess] = @asd but i hope dalli or any other gem will solve this problem and i won't manage session and cache.
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