34 lines
1.4 KiB
ReStructuredText
34 lines
1.4 KiB
ReStructuredText
======================
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Advanced configuration
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======================
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OpenStack clouds run on platforms that differ greatly in the capabilities that
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they provide. By default, the Compute service seeks to abstract the underlying
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hardware that it runs on, rather than exposing specifics about the underlying
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host platforms. This abstraction manifests itself in many ways. For example,
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rather than exposing the types and topologies of CPUs running on hosts, the
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service exposes a number of generic CPUs (virtual CPUs, or vCPUs) and allows
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for overcommitting of these. In a similar manner, rather than exposing the
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individual types of network devices available on hosts, generic
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software-powered network ports are provided. These features are designed to
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allow high resource utilization and allows the service to provide a generic
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cost-effective and highly scalable cloud upon which to build applications.
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This abstraction is beneficial for most workloads. However, there are some
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workloads where determinism and per-instance performance are important, if not
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vital. In these cases, instances can be expected to deliver near-native
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performance. The Compute service provides features to improve individual
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instance for these kind of workloads.
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.. include:: /common/numa-live-migration-warning.txt
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.. toctree::
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:maxdepth: 2
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pci-passthrough
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cpu-topologies
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huge-pages
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virtual-gpu
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file-backed-memory
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port_with_resource_request
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