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content/en/docs/concepts/workloads/autoscaling.md

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@@ -18,32 +18,32 @@ There are manual and automatic ways to scale your workloads, depending on your u
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## Scaling workloads manually
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Kubernetes supports _manual scaling_ of workloads, either by changing the number of
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{{< glossary_tooltip text="Replicas" term_id="replica">}} of an object that manages a set of
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{{< glossary_tooltip text="replicas" term_id="replica">}} defined for an object that manages a set of
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{{< glossary_tooltip text="Pods" term_id="pod" >}} (for example a {{< glossary_tooltip text="Deployment" term_id="deployment" >}}),
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or by adjusting the provided resources of each Replica (for example CPU or memory).
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### Scaling the number of Replicas of a workload
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### Manual changes to replica count
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You can use the `kubectl scale` command to increase or decrease the number of Replicas of a workload:
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You can use the `kubectl scale` command to increase or decrease the number of replicas for a workload:
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```shell
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kubectl scale deployment <deployment-name> --replicas=<desired-replicas>
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kubectl scale deployment <deployment-name> --replicas=<desired-count>
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```
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See also this [example of scaling a Deployment](/docs/concepts/workloads/controllers/deployment/#scaling-a-deployment) in the `Deployment` documentation.
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### Resizing workloads in-place
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Instead of scaling the number of Replicas of a workload, you can also adjust the provided resources
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of each Replica, in-place. You do this by patching the entries in one or both of the following
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fields of the `Pod` or [PodTemplate](/docs/concepts/workloads/pods/#pod-templates) you want to resize:
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Instead of scaling the number of replicas of a workload, you can also adjust the provided resources
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for a particular pod or set of pods, in-place. You do this by patching the entries in one or both of the following
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fields of the `Pod` or [pod template](/docs/concepts/workloads/pods/#pod-templates) you want to resize:
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- `spec.containers[*].resources.requests`
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- `spec.containers[*].resources.limits`
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{{< caution >}}
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{{< note >}}
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Resizing a workload in-place **without** restarting the Pods or its Containers requires Kubernetes version 1.27 or later.
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{{< /caution >}}
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{{< /note >}}
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See also this task about [resizing CPU and memory resources](/docs/tasks/configure-pod-container/resize-container-resources) assigned to Containers.
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In Kubernetes, you can automatically scale a workload horizontally using a _HorizontalPodAutoscaler_ (HPA).
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It is implemented as a Kubernetes API resource and a {{< glossary_tooltip text="controller" term_id="controller" >}}
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and periodically adjusts the number of {{< glossary_tooltip text="Replicas" term_id="replica" >}}
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and periodically adjusts the number of {{< glossary_tooltip text="replicas" term_id="replica" >}}
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in a workload to match observed resource utilization such as CPU or memory usage.
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There is a [walkthrough example](/docs/tasks/run-application/horizontal-pod-autoscale-walkthrough) of configuring a HorizontalPodAutoscaler for a Deployment.
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There is a [walkthrough tutorial](/docs/tasks/run-application/horizontal-pod-autoscale-walkthrough) of configuring a HorizontalPodAutoscaler for a Deployment.
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### Scaling workloads vertically
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