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Authors: Noel Morimoto
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the old-timers reading this chapter, it is analogous to the difference between the copy
command and the xcopy command in DOS. The copy command reads, writes, reads,
writes information. The xcopy command reads, reads, reads information and then writes,
writes, writes the information. Because more information is read into a buffer and trans-
ferred in bulk, the information is transmitted significantly faster.
Most users on a high-speed local area network (LAN) won’t notice the improvements when
ptg
opening and saving files out of something like Microsoft Office against a Windows Server
2008/2008 R2 server; however, for users who might be copying up large image files or data
sets between systems will find the information copying 10 to 30 times faster. The perfor-
mance improvement is very noticeable in wide area network (WAN) situations on networks
with high latency. Because a typical transfer of files requires short read and write segments
of data, a file could take minutes to transfer across a WAN that can transfer in seconds
between SMB2-connected systems because the round-trip chatter is drastically reduced.
For SMB2 to work effectively, the systems on both ends need to be Windows Server
2008/2008 R2 systems, Windows Vista or Windows 7 systems, or a combination of the
two. A Windows XP client to a Windows Server 2008/2008 R2 server will communicate
over SMB 1.0 for backward compatibility and will not gain from this new technology.
SMB2 and the benefits of this embedded technology are discussed in more detail in
Chapter 32, “Optimizing Windows Server 2008 R2 for Branch Office Communications.”
Hyper-V
Hyper-V is a technology built in to the core of the operating system in Windows Server
2008 and expanded in Windows Server 2008 R2 that greatly enhances the performance
and capabilities of server virtualization in a Windows environment. In the past, virtual
server software sat on top of the network operating system and each guest session was
dependent on many shared components of the operating system.
Hyper-V provides a very thin layer between the hardware abstract layer of the system and
the operating system that provides guest sessions in a virtualized environment to commu-
nicate directly with the hardware layer of the system. Without having the host operating
system in the way, guest sessions can perform significantly faster than in the past, and
8
CHAPTER 1
Windows Server 2008 R2 Technology Primer
guest sessions can operate independent of the host operating system in terms of better
reliability from eliminating host operating system bottlenecks.
Hyper-V and server virtualization is covered in more detail in Chapter 37, “Deploying and
Using Windows Virtualization.”
Core Parking
A technology enhanced in the core Windows Server 2008 R2 operating system is a power-
management technology called core parking. Normally, when a multicore server runs, all
cores on all processors run at the highest speed possible, regardless of whether the server is
being utilized. For organizations that need high capacity during the weekdays when
employees are working, that means their systems are effectively idle during evenings and
weekends, or more than two thirds of the time, yet consuming power and expending
heat. With core parking, servers with the latest processors that recognize core parking
protocols will shut down cores on a system when not in use. So, on a 16-core server, if
only 2 cores are needed, the other 14 cores are powered off automatically. This dramati-
cally improves power management and decreases the cost of operations of server systems.
Windows Server 2008 R2 as an Application Server
ptg
As much as there have been significant improvements in Windows Server 2008 R2 under
the hood that greatly enhance the performance, reliability, and scalability of Windows
Server 2008 R2 in the enterprise, Windows servers have always been exceptional applica-
tion servers hosting
command and the xcopy command in DOS. The copy command reads, writes, reads,
writes information. The xcopy command reads, reads, reads information and then writes,
writes, writes the information. Because more information is read into a buffer and trans-
ferred in bulk, the information is transmitted significantly faster.
Most users on a high-speed local area network (LAN) won’t notice the improvements when
ptg
opening and saving files out of something like Microsoft Office against a Windows Server
2008/2008 R2 server; however, for users who might be copying up large image files or data
sets between systems will find the information copying 10 to 30 times faster. The perfor-
mance improvement is very noticeable in wide area network (WAN) situations on networks
with high latency. Because a typical transfer of files requires short read and write segments
of data, a file could take minutes to transfer across a WAN that can transfer in seconds
between SMB2-connected systems because the round-trip chatter is drastically reduced.
For SMB2 to work effectively, the systems on both ends need to be Windows Server
2008/2008 R2 systems, Windows Vista or Windows 7 systems, or a combination of the
two. A Windows XP client to a Windows Server 2008/2008 R2 server will communicate
over SMB 1.0 for backward compatibility and will not gain from this new technology.
SMB2 and the benefits of this embedded technology are discussed in more detail in
Chapter 32, “Optimizing Windows Server 2008 R2 for Branch Office Communications.”
Hyper-V
Hyper-V is a technology built in to the core of the operating system in Windows Server
2008 and expanded in Windows Server 2008 R2 that greatly enhances the performance
and capabilities of server virtualization in a Windows environment. In the past, virtual
server software sat on top of the network operating system and each guest session was
dependent on many shared components of the operating system.
Hyper-V provides a very thin layer between the hardware abstract layer of the system and
the operating system that provides guest sessions in a virtualized environment to commu-
nicate directly with the hardware layer of the system. Without having the host operating
system in the way, guest sessions can perform significantly faster than in the past, and
8
CHAPTER 1
Windows Server 2008 R2 Technology Primer
guest sessions can operate independent of the host operating system in terms of better
reliability from eliminating host operating system bottlenecks.
Hyper-V and server virtualization is covered in more detail in Chapter 37, “Deploying and
Using Windows Virtualization.”
Core Parking
A technology enhanced in the core Windows Server 2008 R2 operating system is a power-
management technology called core parking. Normally, when a multicore server runs, all
cores on all processors run at the highest speed possible, regardless of whether the server is
being utilized. For organizations that need high capacity during the weekdays when
employees are working, that means their systems are effectively idle during evenings and
weekends, or more than two thirds of the time, yet consuming power and expending
heat. With core parking, servers with the latest processors that recognize core parking
protocols will shut down cores on a system when not in use. So, on a 16-core server, if
only 2 cores are needed, the other 14 cores are powered off automatically. This dramati-
cally improves power management and decreases the cost of operations of server systems.
Windows Server 2008 R2 as an Application Server
ptg
As much as there have been significant improvements in Windows Server 2008 R2 under
the hood that greatly enhance the performance, reliability, and scalability of Windows
Server 2008 R2 in the enterprise, Windows servers have always been exceptional applica-
tion servers hosting
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