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Merge pull request #1321 from ffromani/nfd-topo-updater-fix-docs

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docs: nfd-updater: clarify accounting
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docs/usage/nfd-topology-updater.md
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@ -17,6 +17,15 @@ resources and hence the allocatable resources on a per-zone basis by updating
It makes sure that new NodeResourceTopology instances are created for each new It makes sure that new NodeResourceTopology instances are created for each new
nodes that get added to the cluster. nodes that get added to the cluster.
Because of the design and implementation of Kubernetes, only resources exclusively
allocated to [Guaranteed Quality of Service](https://kubernetes.io/docs/concepts/workloads/pods/pod-qos/#guaranteed)
pods will be accounted.
This includes
[CPU cores](https://kubernetes.io/docs/tasks/administer-cluster/cpu-management-policies/#static-policy),
[memory](https://kubernetes.io/docs/tasks/administer-cluster/memory-manager/#policy-static)
and
[devices](https://kubernetes.io/docs/concepts/extend-kubernetes/compute-storage-net/device-plugins/).
When run as a daemonset, nodes are re-examined for the allocated resources When run as a daemonset, nodes are re-examined for the allocated resources
(to determine the information of the allocatable resources on a per-zone basis (to determine the information of the allocatable resources on a per-zone basis
where a zone can be a NUMA node) at an interval specified using the where a zone can be a NUMA node) at an interval specified using the