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This guide covers the association features of Active Record. After reading this guide, you will know how to: Understand the various types of associations. Declare associations between Active Record models. Choose the right association type for your models. Use Single Table Inheritance. Setting up and using Delegated Types. 1 Associations OverviewActive Record associations allow you to define relat
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Distributed key-value database Features Built on Tokyo Tyrant. One of the fastest key-value databases. Tokyo Tyrant has been in development for many years and is used in production by Plurk.com, mixi.jp and scribd.com (to name a few)... Great performance (comparable to memcached!) Can store millions of keys on very few servers - tested in production Scale out by just adding nodes Nodes are replica
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Update 4:: Introducing Diggâs IDDB Infrastructure by Joe Stump. IDDB is a way to partition both indexes (e.g. integer sequences and unique character indexes) and actual tables across multiple storage servers (MySQL and MemcacheDB are currently supported with more to follow). Update 3:: Scaling Digg and Other Web Applications. Update 2:: How Digg Works and How Digg Really Works (wear ear plugs). Br
This section does not cite any sources. Please help improve this section by adding citations to reliable sources. Unsourced material may be challenged and removed. (June 2013) (Learn how and when to remove this message) The system uses a clientâserver architecture. The servers maintain a keyâvalue associative array; the clients populate this array and query it by key. Keys are up to 250 bytes long
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