??? Management is much simpler on NUMA systems than on clusters because there
is only one copy of the operating system to manage and only one database
instance is typically deployed.
Today, the Hewlett Packard Superdome is an example of a NUMA system with demonstrated
scalability in production databases that scale into dozens of terabytes of
data. Since this platform behaves like, and is managed the same as, SMP systems,
NUMA and SMP systems have similar tradeoffs (although NUMA systems tend to be
higher priced).
Grid Computing
The ???g??? in Oracle??™s database nomenclature since Oracle Database 10g signifies the
company??™s focus on enabling grid computing. Grids are simply pools of computers
that provide needed resources for applications on an as-needed basis. The goal is to
provide computing resources that transparently scale to the user community, much
as an electrical utility company can deliver power to meet peak demand by accessing
energy from other power providers??™ plants via a power grid. Computing grids enable
this dynamic provisioning of CPU and data resources (shown in Figure 12-6).
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