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AWS autoscaling documentation change

Service: autoscaling · 2025-11-22 · Documentation low

File: autoscaling/ec2/userguide/ec2-auto-scaling-zonal-shift.md

Summary

Updated service name references from 'Auto Scaling' to 'Amazon EC2 Auto Scaling' for branding consistency

Security assessment

The changes are purely textual replacements of service names without any security context. No vulnerabilities, security fixes, or security features are mentioned or added. The content still discusses the same zonal shift functionality without security implications.

Diff

diff --git a/autoscaling/ec2/userguide/ec2-auto-scaling-zonal-shift.md b/autoscaling/ec2/userguide/ec2-auto-scaling-zonal-shift.md
index 74dcab1d5..96c8f9e74 100644
--- a//autoscaling/ec2/userguide/ec2-auto-scaling-zonal-shift.md
+++ b//autoscaling/ec2/userguide/ec2-auto-scaling-zonal-shift.md
@@ -5 +5 @@
-Auto Scaling group zonal shift conceptsHow zonal shift works for Auto Scaling groupsBest practices for using zonal shift
+Amazon EC2 Auto Scaling group zonal shift conceptsHow zonal shift works for Amazon EC2 Auto Scaling groupsBest practices for using zonal shift
@@ -7 +7 @@ Auto Scaling group zonal shift conceptsHow zonal shift works for Auto Scaling gr
-# Auto Scaling group zonal shift
+# Amazon EC2 Auto Scaling group zonal shift
@@ -9 +9 @@ Auto Scaling group zonal shift conceptsHow zonal shift works for Auto Scaling gr
-Zonal shift is a capability in the Amazon Application Recovery Controller (ARC). With zonal shift, you can quickly recover from application impairments in an Availability Zone with a single action. When you enable zonal shift for an Auto Scaling group, the group is registered with the ARC zonal shift service. Then, you can start a zonal shift using the AWS Management Console, AWS CLI, or API and the Auto Scaling group treats the Availability Zone with an active zonal shift as impaired. 
+Zonal shift is a capability in the Amazon Application Recovery Controller (ARC). With zonal shift, you can quickly recover from application impairments in an Availability Zone with a single action. When you enable zonal shift for an Amazon EC2 Auto Scaling group, the group is registered with the ARC zonal shift service. Then, you can start a zonal shift using the AWS Management Console, AWS CLI, or API and the Amazon EC2 Auto Scaling group treats the Availability Zone with an active zonal shift as impaired. 
@@ -11 +11 @@ Zonal shift is a capability in the Amazon Application Recovery Controller (ARC).
-## Auto Scaling group zonal shift concepts
+## Amazon EC2 Auto Scaling group zonal shift concepts
@@ -18 +18 @@ Before proceeding, make sure that you are familiar with the following core conce
-Auto Scaling can register Auto Scaling groups with ARC zonal shift when you enable this feature. After registration, you can view your resources with the [ARC `ListManagedResources`](https://docs.aws.amazon.com/arc-zonal-shift/latest/api/API_ListManagedResources.html) API. For more information, see [Zonal shift in ARC](https://docs.aws.amazon.com/r53recovery/latest/dg/arc-zonal-shift.html) in the _Amazon Application Recovery Controller (ARC) Developer Guide_.
+Amazon EC2 Auto Scaling can register Amazon EC2 Auto Scaling groups with ARC zonal shift when you enable this feature. After registration, you can view your resources with the [ARC `ListManagedResources`](https://docs.aws.amazon.com/arc-zonal-shift/latest/api/API_ListManagedResources.html) API. For more information, see [Zonal shift in ARC](https://docs.aws.amazon.com/r53recovery/latest/dg/arc-zonal-shift.html) in the _Amazon Application Recovery Controller (ARC) Developer Guide_.
@@ -23 +23 @@ Auto Scaling can register Auto Scaling groups with ARC zonal shift when you enab
-Auto Scaling attempts to keep capacity in each Availability Zone balanced. When an imbalance occurs between Availability Zones, Auto Scaling automatically attempts to fix the imbalance. For more information, see [Instance distribution](./auto-scaling-benefits.html#AutoScalingBehavior.Rebalancing).
+Amazon EC2 Auto Scaling attempts to keep capacity in each Availability Zone balanced. When an imbalance occurs between Availability Zones, Amazon EC2 Auto Scaling automatically attempts to fix the imbalance. For more information, see [Instance distribution](./auto-scaling-benefits.html#AutoScalingBehavior.Rebalancing).
@@ -28 +28 @@ Auto Scaling attempts to keep capacity in each Availability Zone balanced. When
-Dynamic scaling scales the desired capacity of your Auto Scaling group based on metrics that you choose with scaling policies. For more information, see [Dynamic scaling for Amazon EC2 Auto Scaling](./as-scale-based-on-demand.html).
+Dynamic scaling scales the desired capacity of your Amazon EC2 Auto Scaling group based on metrics that you choose with scaling policies. For more information, see [Dynamic scaling for Amazon EC2 Auto Scaling](./as-scale-based-on-demand.html).
@@ -33 +33 @@ Dynamic scaling scales the desired capacity of your Auto Scaling group based on
-Auto Scaling periodically checks the health status of all instances within an Auto Scaling group to make sure they're running and in good condition. When an unhealthy instance is detected, Auto Scaling marks it for replacement. For more information, see [Health checks for instances in an Auto Scaling group](./ec2-auto-scaling-health-checks.html).
+Amazon EC2 Auto Scaling periodically checks the health status of all instances within an Amazon EC2 Auto Scaling group to make sure they're running and in good condition. When an unhealthy instance is detected, Amazon EC2 Auto Scaling marks it for replacement. For more information, see [Health checks for instances in an Amazon EC2 Auto Scaling group](./ec2-auto-scaling-health-checks.html).
@@ -38 +38 @@ Auto Scaling periodically checks the health status of all instances within an Au
-You can use an instance refresh to update the instances in your Auto Scaling group. After an instance refresh is started, Auto Scaling attempts to replace all instances in your Auto Scaling group. For more information, see [Use an instance refresh to update instances in an Auto Scaling group](./asg-instance-refresh.html).
+You can use an instance refresh to update the instances in your Amazon EC2 Auto Scaling group. After an instance refresh is started, Amazon EC2 Auto Scaling attempts to replace all instances in your Amazon EC2 Auto Scaling group. For more information, see [Use an instance refresh to update instances in an Amazon EC2 Auto Scaling group](./asg-instance-refresh.html).
@@ -48 +48 @@ You can tolerate the loss of a single Availability Zone because you have enough
-When you increase the desired capacity of an Auto Scaling group, Auto Scaling attempts to launch additional instances to meet the new desired capacity. By default, Auto Scaling launches instance in a balanced way to maintain equal capacity across each enabled Availability Zone in an Auto Scaling group.
+When you increase the desired capacity of an Amazon EC2 Auto Scaling group, Amazon EC2 Auto Scaling attempts to launch additional instances to meet the new desired capacity. By default, Amazon EC2 Auto Scaling launches instance in a balanced way to maintain equal capacity across each enabled Availability Zone in an Amazon EC2 Auto Scaling group.
@@ -50 +50 @@ When you increase the desired capacity of an Auto Scaling group, Auto Scaling at
-## How zonal shift works for Auto Scaling groups
+## How zonal shift works for Amazon EC2 Auto Scaling groups
@@ -52 +52 @@ When you increase the desired capacity of an Auto Scaling group, Auto Scaling at
-Suppose you have an Auto Scaling group with the following Availability Zones: 
+Suppose you have an Amazon EC2 Auto Scaling group with the following Availability Zones: 
@@ -65 +65 @@ You have zonal shift enabled in all Availability Zones and notice failures in `u
-  * **Scaling out** – Auto Scaling will launch all new capacity requests in the healthy Availability Zones (`us-east-1b` and `us-east-1c`).
+  * **Scaling out** – Amazon EC2 Auto Scaling will launch all new capacity requests in the healthy Availability Zones (`us-east-1b` and `us-east-1c`).
@@ -67 +67 @@ You have zonal shift enabled in all Availability Zones and notice failures in `u
-  * **Dynamic scaling** – Auto Scaling will block scaling policies from decreasing desired capacity in all Availability Zones. Auto Scaling will not block scaling policies from increasing desired capacity in all Availability Zones.
+  * **Dynamic scaling** – Amazon EC2 Auto Scaling will block scaling policies from decreasing desired capacity in all Availability Zones. Amazon EC2 Auto Scaling will not block scaling policies from increasing desired capacity in all Availability Zones.
@@ -69 +69 @@ You have zonal shift enabled in all Availability Zones and notice failures in `u
-  * **Instance refreshes** – Auto Scaling will extend the timeout for any instance refresh process that is delayed while a zonal shift is active.
+  * **Instance refreshes** – Amazon EC2 Auto Scaling will extend the timeout for any instance refresh process that is delayed while a zonal shift is active.
@@ -85 +85 @@ To maintain high availability for your applications when using zonal shift, we r
-  * Monitor EventBridge notifications to determine when there is an ongoing Availability Zone impairment event. For more information, see [Use EventBridge to handle Auto Scaling events](./automating-ec2-auto-scaling-with-eventbridge.html).
+  * Monitor EventBridge notifications to determine when there is an ongoing Availability Zone impairment event. For more information, see [Use EventBridge to handle Amazon EC2 Auto Scaling events](./automating-ec2-auto-scaling-with-eventbridge.html).
@@ -89 +89 @@ To maintain high availability for your applications when using zonal shift, we r
-  * Set an instance maintenance policy with a minimum healthy percentage of 100. With this setting, Auto Scaling waits for a new instance to be ready to use before terminating an unhealthy instance.
+  * Set an instance maintenance policy with a minimum healthy percentage of 100. With this setting, Amazon EC2 Auto Scaling waits for a new instance to be ready to use before terminating an unhealthy instance.
@@ -98 +98 @@ For prescaled customers, we also recommend the following:
-  * Use zonal autoshift in ARC for your Auto Scaling groups. The zonal autoshift capability in ARC allows AWS to shift traffic for a resource away from an Availability Zone when AWS detects an impairment in an Availability Zone. For more information, see [Zonal autoshift in ARC](https://docs.aws.amazon.com/r53recovery/latest/dg/arc-zonal-autoshift.html) in the _Amazon Application Recovery Controller (ARC) Developer Guide_.
+  * Use zonal autoshift in ARC for your Amazon EC2 Auto Scaling groups. The zonal autoshift capability in ARC allows AWS to shift traffic for a resource away from an Availability Zone when AWS detects an impairment in an Availability Zone. For more information, see [Zonal autoshift in ARC](https://docs.aws.amazon.com/r53recovery/latest/dg/arc-zonal-autoshift.html) in the _Amazon Application Recovery Controller (ARC) Developer Guide_.
@@ -107 +107 @@ For customers with cross-zone disabled load balancers, we also recommend the fol
-  * If you are using zonal shift on both Auto Scaling groups and load balancers, cancel the zonal shift on your Auto Scaling group first. Then, wait for capacity to balance across all Availability Zones before canceling the zonal shift on the load balancer.
+  * If you are using zonal shift on both Amazon EC2 Auto Scaling groups and load balancers, cancel the zonal shift on your Amazon EC2 Auto Scaling group first. Then, wait for capacity to balance across all Availability Zones before canceling the zonal shift on the load balancer.
@@ -109 +109 @@ For customers with cross-zone disabled load balancers, we also recommend the fol
-  * Due to the possibility for imbalanced capacity when you enable zonal shift and use a cross-zone disabled load balancer, Auto Scaling includes an extra validation step. If you are following best practices, you can acknowledge this possibility by selecting the AWS Management Console checkbox or using the `skip-zonal-shift-validation` flag in `CreateAutoScalingGroup`, `UpdateAutoScalingGroup`, or `AttachTrafficSources`.
+  * Due to the possibility for imbalanced capacity when you enable zonal shift and use a cross-zone disabled load balancer, Amazon EC2 Auto Scaling includes an extra validation step. If you are following best practices, you can acknowledge this possibility by selecting the AWS Management Console checkbox or using the `skip-zonal-shift-validation` flag in `CreateAutoScalingGroup`, `UpdateAutoScalingGroup`, or `AttachTrafficSources`.
@@ -114 +114 @@ For customers with cross-zone disabled load balancers, we also recommend the fol
-For more information about using zonal shift with Auto Scaling groups, see the AWS Compute Blog [Using zonal shift with Amazon EC2 Auto Scaling](https://aws.amazon.com/blogs/compute/using-zonal-shift-with-amazon-ec2-auto-scaling/).
+For more information about using zonal shift with Amazon EC2 Auto Scaling groups, see the AWS Compute Blog [Using zonal shift with Amazon EC2 Auto Scaling](https://aws.amazon.com/blogs/compute/using-zonal-shift-with-amazon-ec2-auto-scaling/).