Merge pull request #1382 from YanTingLittleCute/patch-12
Automatic merge from submit-queue. Update rescheduling.md
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@ -45,7 +45,7 @@ Example use cases for rescheduling are
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* moving a pod onto an under-utilized node
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* moving a pod onto a node that meets more of the pod's affinity/anti-affinity preferences
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* moving a running pod off of a node in anticipation of a known or speculated future event
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* draining a node in preparation for maintenance, decomissioning, auto-scale-down, etc.
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* draining a node in preparation for maintenance, decommissioning, auto-scale-down, etc.
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* "preempting" a running pod to make room for a pending pod to schedule
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* proactively/speculatively make room for large and/or exclusive pods to facilitate
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fast scheduling in the future (often called "defragmentation")
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@ -145,12 +145,12 @@ it allows the API server to do validation (e.g. to catch mis-spelling).
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In the future, which priorities are usable for a given namespace and pods with certain
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attributes may be configurable, similar to ResourceQuota, LimitRange, or security policy.
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Priority and resource QoS are indepedent.
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Priority and resource QoS are independent.
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The priority we have described here might be used to prioritize the scheduling queue
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(i.e. the order in which a scheduler examines pods in its scheduling loop), but the two
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priority concepts do not have to be connected. It is somewhat logical to tie them
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together, since a higher priority genreally indicates that a pod is more urgent to get
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together, since a higher priority generally indicates that a pod is more urgent to get
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running. Also, scheduling low-priority pods before high-priority pods might lead to
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avoidable preemptions if the high-priority pods end up preempting the low-priority pods
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that were just scheduled.
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