Umbraco

Umbraco is an open source content management system (CMS) platform for publishing content on the World Wide Web and intranets. It is written in C# and deployed on Microsoft based infrastructure. The open source backend is released under an MIT License while the UI is released under the Umbraco license[1].

Umbraco was developed by Niels Hartvig in 2000 and released as open source software in 2004[2]. In 2009, CMS Wire described it as one of the leading .NET-based open source CMS systems[3][4]. In 2010, with 1000 downloads a day[5], Umbraco was in the Top 5 most popular downloads via the Microsoft Web Platform Installer, two places below its main rival DotNetNuke[6] and was the 12th most downloaded application from Codeplex, six places below DotNetNuke and 13 places higher than mojoPortal[7].

Technology

Umbraco is primarily written in C#, stores data in a number of relational databases (commonly Microsoft SQL Server) and works on Microsoft IIS.

Database tier

In 2008, developer Ruben Verbough introduced a data abstraction layer, making it possible for Umbraco to support databases other than SQL Server. In version 4 of Umbraco, support for MySQL, SQL Server and VistaDB come as standard[8].
[edit] Deployment

The standard release of Umbraco is typically deployed on IIS in an environment which supports Full Trust. While a Full Trust environment is mandatory to install and operate the standard release, the codebase has been branched and modified to produce a version of the framework and backend UI which supports Medium Trust[9][self-published source?].

Research has also been undertaken on running an Umbraco website on Mono on Linux[10][11].

Umbraco can be deployed on a single physical server running the database and web tier, and this deployment model can be appropriate for small low-cost sites. Umbraco sites which serve content under higher load can also be deployed on a load balanced cluster. Load balanced Umbraco installations can use software or hardware load balancers, and load balanced network files can be shared using a SAN, NAS or a cluster file system or using a file replication service between nodes in the cluster[12][self-published source?].
[edit] Releases

Version 4.1 Beta II was released on 16 February 2010 which refactors a number of key components of the framework[5], including the UI tree control to improve performance and the user experience and parts of the data access layer to reduce the number of database calls.

Version 5 is a rewrite of the framework[5] planned to be released at the end of 2010. It will be feature-identical to version 4.1 but will be built using ASP.NET MVC 2.0[citation needed].