Changes in Functionality from Windows Server 2003 to Windows Server 2008
In the Windows Server® 2008 operating system, Microsoft is introducing many new features and technologies, which were not available in Windows Server® 2003 with Service Pack 1 (SP1), that will help to increase the security of computers running Windows Server 2008, increase productivity, and reduce administrative overhead. This set of topics describes some of these features and technologies.
These topics apply to the released version of Windows Server 2008. They do not describe all of the changes that are included in Windows Server 2008. Instead, they highlight changes that will potentially have the greatest impact on your use of Windows Server 2008 and provide references to additional information.
New Features in Windows Server 2008
1. 64-bit only—Windows Server 2008 R2 marks the first time that the Windows Server OS will be 64-bit only, meaning that Server 2008 R2 must run on x64-compatible hardware.
2. Support for 256 cores—Improved scalability is another important feature in Server 2008 R2, which will be able to utilize up to 256 cores.
3. Core Parking—Windows Server 2008 R2's new Core Parking functionality enables improved power management. Core Parking lets the OS suspend cores that aren't in use,
4. Remote Desktop Services—Another change in Windows Server 2008 R2 is the rebranding of Terminal Services to Remote Desktop Services. However, the changes aren't in name alone. The new Remote Desktop Services includes support for the Aero Glass interface, multiple monitors, and DirectX 11, 10 and 9.
5. New Hyper-V—A new Hyper-V release is included in Server 2008 R2. A prerelease version of Hyper-V was shipped with the original Windows Server 2008. R2 includes the latest version of Hyper-V. In this version, VMs are able to address up to 32 cores per VM, and the use of TCP Offload and Jumbo Frames provides improved networking performance. One of the biggest improvements in Hyper-V is support for the next item.
6. Live Migration—probably one of the most anticipated features in R2, Live Migration improves VM availability by letting you move Hyper-V VMs between hosts with no downtime.
7. Support for the .NET Framework in Server Core—One of the biggest disappointments in the original Server 2008 release was the lack of support for the .NET Framework in Server Core, which meant that technologies that seemed perfect for Server Core,
8. Power Shell 2.0—Server 2008 R2 includes Power Shell 2.0, which features improved WMI cmdlets and support for running scripts on remote systems,
9. Remote server management—Server Manager was one of the best improvements in Server 2008 because it provides a centralized and useful console for managing Windows Server.
10. Active Directory Administrative Center—For administrators, the biggest change in Server 2008 R2 is undoubtedly the new Active Directory Administrative Center, which replaces the older Active Directory,
New Features in Windows Server 2003
1. Windows Server 2003, Web Edition—Web Edition is one of the most anticipated components of Microsoft's line of server products. Specifically designed for use as a specialized Web server and in Web farms,
2. Integrated support for the .NET Common Language Runtime (CLR)—All Windows Server 2003 editions will come bundled with the CLR, which is a vital stepping stone for future adoption of the .NET Framework. CLR will let .NET applications immediately run on the Windows Server 2003 platform without requiring additional runtime components.
3. The Universal Description, Discovery, and Integration (UDDI) service—All versions of Windows Server 2003 except Web Edition will support the UDDI service..
4. RIS support for Windows server installations—Another welcome addition to Windows Server 2003 is the ability to use RIS to perform Windows server installations.
5. Headless server operations—A long-overdue Windows server feature is support for headless operations. In headless mode, Windows Server 2003 can run without a keyboard, mouse, and monitor.
6. Microsoft IIS 6.0—You'll find some big changes in IIS 6.0, which is bundled with all editions of Windows Server 2003. Now locked down by default, IIS 6.0 sports a more robust architecture,
7. Install Replica from Media—In Win2K AD, performing an initial replication to a branch-office domain controller (DC) over a WAN link can be a painfully slow experience. Windows Server 2003 solves this problem by letting you replicate a complete copy of the AD database to media.
8. Resultant Set of Polices (RSoP)—Addressing another Win2K shortcoming, Windows Server 2003 includes a new RSoP feature that lets you study the net effect of policy settings on users and computers. RSoP can be a powerful aid in debugging policies, particularly because the new planning mode lets you see the effects of new policies before you deploy them.
9. Active Directory Domain Rename—AD's unforgiving nature has always been a big drawback to setting up AD on Win2K. Windows Server 2003 adds some friendliness by letting you change a domain's DNS and NetBIOS names,
10. Microsoft Volume Shadow Copy Service (VSS)—One of the coolest Windows Server 2003 gems is its VSS feature. A volume shadow copy is a point-in-time copy of a given storage location..
One or more processors with a recommended minimum speed of 550 megahertz (MHz). The minimum supported speed is 133 MHz. A maximum of eight processors per computer is supported. Processors from the Intel Pentium/Celeron family, AMD K6/Athlon/Duron family, or compatible processors are recommended.
256 megabytes (MB) of RAM (recommended minimum). 128 MB is the minimum supported, and 32 gigabytes (GB) is the maximum supported.
For computers with more than 4 GB of RAM, be sure to confirm hardware compatibility
For computers with more than 4 GB of RAM, be sure to confirm hardware compatibility
For an x64-based computer:
One or more processors with a minimum speed of 1.4 GHz. A maximum of eight processors per computer is supported.
1 GB of RAM minimum, 1024 GB (1 Terabyte) maximum.
• Minimum: 1GHz (x86 processor) or 1.4GHz (x64 processor)
• Recommended: 2GHz or faster
Note: An Intel Itanium 2 processor is required for Windows Server 2008 for Itanium-Based Systems
• Minimum: 512MB RAM
• Recommended: 2GB RAM or greater
• Maximum (32-bit systems): 4GB (Standard) or 64GB (Enterprise and Datacenter)
• Maximum (64-bit systems): 32GB (Standard) or 1TB (Enterprise, Datacenter) and 2TB (Itanium-Based Systems)
Available Disk Space
• Minimum: 10GB
• Recommended: 40GB or greater
Note: Computers with more than 16GB of RAM will require more disk space for paging, hibernation, and dump files
Display and Peripherals
• Super VGA (800 x 600) or higher-resolution monitor
• Microsoft Mouse or compatible pointing device
Windows Server 2008 System Requirements
Advantage of Windows Server 2003
Easy to Deploy, Manage, and Use:
With its familiar Windows interface, Windows Server 2003 is easy to use. New streamlined wizards simplify the setup of specific server roles and routine server management tasks so that even servers without a dedicated administrator are easy to manage. In addition, administrators have several new and improved features designed to make it easier to deploy Active Directory
Secure Connected Infrastructure:
Efficient and secure networked computing is more important than ever for a business to remain competitive. Windows Server 2003 lets organizations take advantage of existing IT investments, and extend those advantages to partners, customers, and suppliers by deploying key features like cross-forest trusts in the Microsoft Active Directory® service as well as Microsoft
Enterprise-Class Reliability, Availability, Scalability, and Performance:
Reliability is enhanced through a range of new and improved features including memory mirroring, Hot Add Memory, and health detection in Internet Information Services (IIS) 6.0. For higher availability, the Microsoft Cluster service now supports up to eight-node clusters and geographically separated nodes.
Lower TCO Through Consolidation and the Latest Technology:
Windows Server 2003 provides many technical advances that help organizations lower total cost of ownership (TCO).
Create Dynamic Intranet and Internet Web Sites:
IIS 6.0, the Web server included in Windows Server 2003, provides enhanced security and a dependable architecture that offers application isolation and greatly improved performance
Fast Development with Integrated Application Server:
The Microsoft .NET Framework is deeply integrated into the Windows Server 2003 operating system. Microsoft ASP.NET enables high-performance Web applications. With .NET-connected technology, developers are freed from having to write tedious "plumbing" code and can work efficiently with the programming languages and tools they already know.
Work Smarter By Turning Your File Server Into a Powerful Collaboration Server:
Windows SharePoint Services is a platform for creating large numbers of smart Web communities focused on information sharing and team productivity. It can scale to thousands of sites within an organization
Automate Operations with Script-based and Policy-based Management Tools:
Increase Document Protection and Availability via Intelligent File Storage:
With the new shadow copy restore feature, users can retrieve previous versions of files instantly, without requiring costly assistance from a support professional. Enhancements to the Distributed File System (DFS) and File Replication service (FRS) provide users with a consistent way to access their files wherever they are
Easy to Find, Share, and Reuse XML Web Services:
Windows Server 2003 includes Enterprise UDDI Services, a dynamic and flexible infrastructure for XML Web services.
Advantage of Windows Server 2008
Added power management features that cut hardware and facility costs
Live Migration that moves virtual machines without downtime
Direct Access for connecting remote users without needing a virtual private network
Hyper-V™ that virtualizes system resources without third-party software to optimize your infrastructure