eWEEK Labs' analysis of Nehalem, or the Intel Xeon 5500 series, shows that the microprocessor architecture's integrated memory controller, additional memory channel and slew of performance improvements will allow IT managers to consolidate more virtual machines onto fewer physical systems and will allow the virtualization of apps that couldn't be virtualized before.
Server virtualization is getting a boost from the newest Intel
microprocessor architecture, known as Nehalem.
With an integrated memory controller, an additional memory channel and a
slew of performance improvements, Nehalem will enable IT managers to consolidate
more virtual machines onto fewer physical systems. The new Intel platform
should also be a trigger for IT managers to take a second look at virtualizing
applications that did not perform well when run on VMs hosted on the previous
generation of Intel server chips.
Data center managers anticipating server and virtualization implementations
or upgrades should start testing Nehalem-based systems to gauge performance and
With VMware ESX 4.0 expected to ship sometime this year, now is the time to
begin the evaluation process to see how Intel's newest processor platform might
fit in your data center. eWEEK Labs will be testing servers based on Nehalem as
soon as they become available, so watch for our hands-on test results.
Performance capabilities in the Nehalem microarchitecture-whose formal name
is the Intel Xeon 5500 series-will shift the limiting factors that
currently govern server virtualization from purely physical considerations of
CPU, memory and network bandwidth. The new limit will very likely be the amount
of risk an organization is willing to take by putting many
virtual eggs in a single physical basket
The considerable advances in the Intel Nehalem chip design include Turbo
mode, in which the processor frequency can be controlled based on workload, and
hyperthreading-a function resurrected from the Intel Pentium 4 processor and
now called "simultaneous multithreading." These changes set the stage for new
advances in server virtualization, but not a new benchmark-Intel rival Advanced
Micro Devices has had integrated memory controllers for some time in its
Opteron server chips.
Virtualization heavyweight VMware has been a close partner of both Intel and
AMD to ensure that CPU advances can improve VM
performance with the goal of constantly reducing the difference between
physical and virtual machines.
IT managers also should note that the newly minted Cisco Unified Computing
System server blades, which were announced on March 15, launched using only
Intel Nehalem-based processors. Cisco is hoping that data center managers will
be compelled by this platform, on which it has packaged compute, storage,
network, memory and server virtualization in a unified chassis.