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Cisco Unified Computing System (UCS) (Data Center): A Complete Reference Guide to the Cisco Data Center Virtualization Server Architecture by Roger Andersson, Tommi Salli, Silvano Gai

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Chapter 2. Server Architectures

Processor, memory, and I/O are the three most important subsystems in a server from a performance perspective. At any given point in time, one of them tends to become a bottleneck from the performance perspective. We often hear of applications that are CPU-bound, memory-bound, or I/O-bound.

In this chapter, we will examine these three subsystems with particular reference to servers built according to the IA-32 (Intel® Architecture, 32-bit), often generically called x86 architecture. In particular, we will describe the most recent generation of Intel® processors compatible with the IA-32 architecture; i.e., the Intel® microarchitecture (formerly known by the codename Nehalem).1

1 The authors are thankful to Intel ...

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