Delayed::Job (or DJ) encapsulates the common pattern of asynchronously executing longer tasks in the background. It is a direct extraction from Shopify where the job table is responsible for a multitude of core tasks. Amongst those tasks are: - sending massive newsletters - image resizing - http downloads - updating smart collections - updating solr, our search server, after product changes - batch imports - spam checks WWW: https://github.com/collectiveidea/delayed_job