Whether k8s1. 18 KubeSchedulerConfiguration may be used

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The k8s scheduling implementation comes in two forms: Scheduling Policies and Scheduling Profiles.

What is the relationship between the two? They seem to overlap but have some differences. For example, there is a NodeUnschedulable in the profiles but not in the policy. CheckNodePIDPressure is in the policy, but not in the profiles

My k8s is 1.18 and I want to use a second scheduler that uses MostRequest instead of the LeastRequest policy. With Policy I don’t know which priorities policies are enabled by default and I just want to make minimal changes. How can I know about the default startup policy?

In addition, whether k8s1. 18 can use KubeSchedulerConfiguration, if you can, use of how to implement minimum configuration can be modified

apiVersion: kubescheduler.config.k8s.io/v1beta2
kind: KubeSchedulerConfiguration
        - name: 'NodeResourcesLeastAllocated'
        - name: 'NodeResourcesMostAllocated'
          weight: 100

I really appreciate any help with this

Cluster information:

Kubernetes version:1.18.12
Cloud being used: (put bare-metal if not on a public cloud)
Installation method: Binary installation
Host OS: centos
CNI and version: calico
CRI and version: docker

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