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21 lines
902 B
Plaintext
21 lines
902 B
Plaintext
// Module included in the following assemblies:
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//
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// * updating/understanding_updates/understanding-openshift-update-duration.adoc
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:_mod-docs-content-type: REFERENCE
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[id="factors-affecting-update-duration_{context}"]
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= Factors affecting update duration
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The following factors can affect your cluster update duration:
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* The reboot of compute nodes to the new machine configuration by Machine Config Operator (MCO)
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** The value of `MaxUnavailable` in the machine config pool
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+
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[WARNING]
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====
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The default setting for `maxUnavailable` is `1` for all the machine config pools in {product-title}. It is recommended to not change this value and update one control plane node at a time. Do not change this value to `3` for the control plane pool.
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====
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** The minimum number or percentages of replicas set in pod disruption budget (PDB)
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* The number of nodes in the cluster
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* The health of the cluster nodes
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