O Windows Server® 2008 R2 é o sistema operacional para servidores mais novo da Microsoft. Projetado para ajudar as organizações a reduzir os custos operacionais e aumentar a eficiência, o Windows Server 2008 R2 fornece o controle melhorado da gerência de seus recursos. Foi construído para fornecer um gerenciamento de energia eficaz, reduzindo o consumo da mesma e economizando custos. Ele é ideal também para cenários de escritórios remotos, com capacidades aprimoradas, novas experiências para acesso remoto, novas ferramentas para gerenciamento de servidores em lote e expande a estratégia de Virtualização da Microsoft para clientes e servidores.
#1. Características Poderosas de Hardware e Escalabilidade
O Windows Server 2008 R2 foi construído para executar bem ou melhor na mesma base de hardware do Windows Server 2008. Adicionalmente, o R2 é a primeira versão movida unicamente para a arquitetura 64-bits.
O Windows Server 2008 R2 possui diversas melhorias em termos de CPU. Primeiro, expande o suporte a CPU habilitando clientes a executarem sistemas com até 256 processadores lógicos. Além disso, suporta a tecnologia Second Level Translation (SLAT), que habilita o R2 a tomar vantagem da característica Enhanced Page Tables, encontrada nas CPUs AMD mais recentes, bem como da tecnologia Nested Page Tables encontrada nos processadores Intel mais recentes. Essa combinação habilita o R2 a executar com um gerenciamento de memória aprimorado.
Os componentes do Windows Server 2008 R2 também receberam otimizações para aproveitarem melhor o hardware também. A função de Hyper-V no Windows Server 2008 consegue agora endereçar até 32 CPUs lógicas nos computadores hosts – duas vezes o valor inicial suportado em Hyper-V. Essa capacidade não apenas toma vantagem dos novos sistemas multicore, mas também significa um nível de consolidação maior de máquinas virtuais por host físico..
#2. Reduced Power Consumption
Windows Server 2008 introduced a ‘balanced’ power policy, which monitors the utilization level of the processors on the server and dynamically adjusts the processor performance states to limit power to the needs of the workload. Windows Server 2008 R2 enhances this power saving feature by adding Core Parking and expanding on power-oriented Group Policy settings.
Core Parking is an exciting development that allows Windows Server 2008 R2 to constantly track the relative workloads of every logical core in a server relative to all the others. Cores that aren’t being fully utilized can be put into sleep mode until their silicon muscle is required. This capability means a 16-way server with a light workload can turn itself into a 4-way server until workloads suddenly increase and then spin up reserve CPU power in milliseconds.
Active Directory® Domain Services Group Policy in Windows Server 2008 already gave administrators a certain amount of control over power management on client PCs. These capabilities are enhanced in Windows Server 2008 R2 and Windows® 7 to provide even more precise control in more deployment scenarios for even greater potential savings.
#3. Hyper-V™ in Windows Server 2008 R2
Windows Server 2008 R2 also holds the much-anticipated update to Microsoft’s virtualization technology, Hyper-V™. The new Hyper-V™ was designed to augment both existing virtual machine management as well as to address specific IT challenges, especially around server migration.
Hyper-V™ is an enabling technology for one of Windows Server 2008 R2’s marquee features, Live Migration. With Hyper-V version 1.0, Windows Server 2008 was capable of Quick Migration, which could move VMs between physical hosts with only a few seconds of down-time. Still, those few seconds were enough to cause difficulties in certain scenarios, especially those includling client connections to VM-hosted servers. With Live Migration, moves between physical targets happen in milliseconds, which means migration operations become invisible to connected users.
Customers employing System Center Virtual Machine Manager for Hyper-V will also enjoy additional management and orchestration scenarios, including a new VM-oriented Performance and Resource Optimization feature and updated support for managing failover clusters.
The new Hyper-V™ also has core performance enhancements, including the previously mentioned ability to take advantage of 32 logical processors on the host and to beef up that CPU performance with host support for Second Level Translation (SLAT). Finally, VMs can also add and remove VHD disks without requiring a reboot and also boot from VHD as well.
#4. Increased Desktop Management Efficiencies
Much of the interest in virtualization solutions is in the server world. However, equally exciting advances are being made in presentation virtualization, where processing happens on a server optimized for capacity and availability while graphics, keyboard, mouse, and other user I/O functions are handled at the user’s desktop.
Windows Server 2008 R2 contains enhanced Virtual Desktop Integration (VDI) technology, which extends the functionality of Terminal Services to deliver certain business programs to their employee’s remote desktops. With VDI, programs that Remote Desktop Services sends to a computer are now available on the Start menu right alongside programs that are locally installed. This approach provides improved desktop virtualization and better application virtualization.
Desktop virtualization will benefit from features including improved personalization management, a near-invisible integration of virtualized desktops and applications in Windows 7, better audio and graphics performance, a seriously cool Web access update and more. VDI provides more efficient use of virtualized resources and better integration with local peripheral hardware as well as powerful new virtual management features.
#5. Easier and More Efficient Server Management
Although increasing the capabilities of your server operating system is always a good thing, the perceived downside has always been additional complexity and workload for day-to-day server managers. Windows Server 2008 R2 specifically addresses this problem with lots of work evident across all of its management-oriented consoles. Features in these tools include:
· Improved data center power consumption and management, as evidenced earlier
· Improved remote administration, including a remotely-installable Server Manager
· Improved identity management features via the updated and simplified Active Directory Domain Services and Active Directory Federated Services
· And perhaps the most important new management feature is…
#6. PowerShell 2.0
Windows Server 2008 introduced PowerShell, a powerful command-line-based feature that enables administrators to automate repetitive administration tasks by using command-let (cmdlet) scripts. A series of core cmdlets were pre-installed withWindows Server 2008 along with the basic tools required for administrators to create their own cmdlets.
Windows Server 2008 R2 intriduces PowerShell 2.0, which significantly enhances the earlier version with the inclusion of more than 240 new pre-built cmdlets as well as a new graphical user interface (GUI) that adds professional-level development features for creating new cmdlets. The new GUI includes colored syntaxing, new production script debugging capabilities, and new testing tools.
PowerShell 2.0 also has a deeper reach than its predecessor, with enhanced support available on both Windows 7 and the Server Core role (which previously could not run PowerShell).
#7. Ubiquitous Remote Access
Today’s mobile workforce is increasing the demand on IT to provide remote access to corporate resources. However, managing remote computers is an ongoing challenge, with low wide are network (WAN) bandwidth and sporadic connection and re-connection processes interfering with lengthier desktop management tasks such as Group Policy changes and up-to-date patching.
Windows Server 2008 R2 introduces a new type of connectivity called DirectAccess—a powerful way for remote users to seamlessly access corporate resources without requiring a traditional VPN connection and client software. Using technologies that shipped in Windows Server 2008, Microsoft has added simple management wizards that enable administrators to configure SSTP and IPv6 across both R2 and Windows 7 clients to enable the basic DirectAccess connection, and then augment that connection with additional R2 management and security tools, including management policies and NAP.
With DirectAccess, every user is considered remote all of the time. Users are no longer required to distinguish between local and remote connections. DirectAccess handles all of these distinctions in the background. IT professionals retain precise access control and full perimeter security, helping to ease both desktop security and management headaches on both sides of the connection.
#8. Improved Branch Office Performance and Management
Many branch office IT architectures have relatively low bandwidth. Slow WAN links impact the productivity of branch office employees waiting to access files from the main office, and costs for branch office bandwidth allocation can amount to as much as 33 % of overall corporate IT spending. To address this challenge, Windows Server 2008 R2 introduces a feature called BranchCache™, which reduces WAN utilization and improves the responsiveness of network applications for branch office workers.
With BranchCache™, clients who request access to data on the organization’s network are sent directions to the file on the local (branch office) network if the file has ever been requested there before. If the file is stored locally, those clients get immediate high-speed access. Such files can be stored either on a local BranchCache™ server for larger branch offices or simply on local Windows 7 PCs.
#9. Improved Compliance with Established Best Practices
Optimizing your organization’s servers to help ensure they provide the highest level of security, manageability, availability, and performance requires IT administrators to configure them with established best practices. For most organizations today, using best practices to configure a server is a manual process. Building on the success of specialized Best Practice Analyzers (BPA) from Microsoft for platforms such as Exchange Server 2007 and Microsoft SQL Server® 2008, Windows Server 2008 R2 contains an integrated Best Practices Analyzer for every core server role.
By integrating best practices information directly into Server Manager, Windows Server 2008 R2 makes it easier for administrators to optimize their servers and helps reduce overall support costs by enabling them to catch misconfigurations early, before they can cause a problem.
#10. The Strongest Web and Application Server To Date
Windows Server 2008 R2 includes many updates that make it the best Windows Server application platform yet, but one of the most important is the new Internet Information Services 7 (IIS 7.0).
The new Web server includes features to help applications run faster while using fewer system resources. IIS 7.0 integrates several of the most popular optional extensions associated with Windows Server 2008, including URLScan 3.0 (now known as the Request Filter Module), the Web Playlist, and more. IIS 7.0 also includes updated management capabilities in Server Manager and System Center, and features a more powerful FTP server as well. Simultaneous improvements in other areas of Windows Server 2008 R2 such as .NET support, virtualization, clustering, and failover all combine to increase your applications’ ability to scale with improved availability, fault tolerance, and ease of management.