AppFabric Beta 2 Refresh is an update of AppFabric Beta 2 on top of .NET Framework 4 RTM release. No big changes have been made since Beta 2 release. Essentially, Windows Server AppFabric Beta 2 Refresh has been made available for customers looking to take advantage of .NET Framework 4 RTM. Early adopters that’ve been testing the release already know that Windows Server AppFabric has swallowed technologies formerly codenamed “Dublin” and “Velocity.” Microsoft developed hosting and caching technologies (high-speed access, scale, and high availability) under the Velocity project, while the Dublin codename referred to WF and WCF app creation and management capabilities. “The AppFabric upgrade program does not enable you to upgrade from a Beta 1 or Beta 2 version of AppFabric. Using the program, you can only upgrade from AppFabric Beta 2 Refresh to RTW. You must upgrade from AppFabric Beta 1 or Beta 2 by first uninstalling AppFabric, and then installing a later version,” it’s added in the Release Notes.
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