It is also important to be aware of the upgrade options available with each edition.With this objective in mind, this chapter will focus on providing an overview of both the different Windows Server 2008 R2 editions and the recommended hardware requirements.
Microsoft Server 2008 R2 Enterprise Upgrade Options AvailableMicrosoft Server 2008 R2 Enterprise Full Active DirectoryIt is the least expensive of the various editions and lacks some of the more advanced functionality typically found in the higher end editions such as full Active Directory support and Hyper-V virtualization capabilities. In addition, the Foundation edition limits some of the included features, such as restricting the number of concurrent remote desktop services connections to 50 and is able to access a maximum of 1 processor and 8GB of RAM. Windows Server 2008 R2 Standard is another one of Microsofts entry level server offerings (alongside Windows Web Server R2 2008 and Windows Server R2 2008 Foundation). As previously stated, whilst the original version of Windows Server 2008 supported both 32-bit and 64-bit versions, the R2 version supports only 64-bit processors. ![]() Support for clustering, however, is notably absent from this edition. An upgrade path to Windows Server 2008 R2 Standard is available from Windows Server 2008, Windows 2000 Server and Windows Server 2003 Standard Edition. As with Standard Edition both 32-bit and 64-bit versions are available. Enhancements include support for as many as 8 processors and up to 2TB of RAM. The Datacenter edition represents the top end of the Windows Server 2008 R2 product range and is targeted at mission critical enterprises requiring stability and high uptime levels. Upgrade paths to Windows Server 2008 R2 Datacenter Edition are available from the Datacenter editions of Windows Server 2008, Windows 2000 and 2003. It includes Internet Information Services (IIS) 7.0 along with associated services such as Simple Mail Transfer Protocol (SMTP) and Telnet. The following table provides an overview of Microsofts recommended minimum hardware requirements. For example, whilst it is possible to run Windows Server 2008 R2 in 512MB of RAM it is unlikely that performance levels will be optimal with such a configuration.
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