---
title: "Auto Scaling FAQ"
description: "Short answers about E2E Auto Scaling regions, images, node counts, policies, schedules, load balancers, stopping, deleting, and billing."
content_type: "faq"
product: "auto-scaling"
platform: "MyAccount"
url: "/myaccount/auto-scaling/faq/"
---

# Auto Scaling FAQ

## Which regions is Auto Scaling available in?

Delhi and Chennai. A scale group, its nodes, and its saved image all belong to the same region and
the same project. See
[Create a scale group](/myaccount/auto-scaling/how-to/create-a-scale-group/#before-you-begin).

## Why is creating a scale group refused in Delhi?

Accounts created on or after May 15, 2026 need an exemption from E2E to create one there. Meanwhile, you
can create the scale group in Chennai, from an image saved there. See
[Troubleshooting Auto Scaling](/myaccount/auto-scaling/troubleshooting/auto-scaling/#resource-creation-is-currently-restricted-please-try-from-a-different-location).

## Which images can a scale group use?

A saved image in the **Ready** state that was saved from a C3, M3, SDC3, E1, or E1WC node, or from
the older C, C2, or M series. For Windows, use an image saved from an E1WC node. See
[Create a scale group](/myaccount/auto-scaling/how-to/create-a-scale-group/#before-you-begin).

## Can I use a GPU image?

No. **Select Saved Image** leaves out GPU images. For the images a scale group can use, see
[Which images can a scale group use?](#which-images-can-a-scale-group-use)

## How do I roll out a new version of my application?

With a new scale group. A scale group keeps the image it was created from, so save a new image, create a
new scale group from it, point your load balancer at the new scale group, and delete the old one. See
[Point an existing load balancer at another scale group](/myaccount/auto-scaling/how-to/add-a-load-balancer/#point-an-existing-load-balancer-at-another-scale-group).

## Can I give the nodes a startup script?

No. Make the image start your application instead: set up the node you save the image from so that
your application starts at boot, for example as a systemd service, and create the scale group from that
image. See [Save a node as an image](/myaccount/node/how-to/save-a-node-as-an-image/).

## Can I add an SSH key when I create a scale group?

No. Scale group nodes already keep the SSH keys and root password saved with the
image. Add your key and set the root password on the source node before you save the image. See
[Sign in to scale group nodes](/myaccount/auto-scaling/how-to/sign-in-to-a-node/).

## Can I change a scale group's plan, name, or encryption?

No. The saved image, the plan, the name, and the encryption setting are fixed when you create the
scale group. To change one, create a new scale group with the settings you want. You can change the
rest later: the node counts and the policy while the scale group reads **Running**, its security groups
while it reads **Running** or **Scaling**, and its VPCs and public IP while it reads **Stopped**.
See [Create a scale group](/myaccount/auto-scaling/how-to/create-a-scale-group/).

## Can a scale group scale down to zero nodes?

No. **Minimum Node** is at least 1. To run no nodes while keeping the scale group's settings, stop the
scale group. You then pay nothing for nodes. The saved image and any load balancer or VPC still have
their own charges. See
[Stop the scale group](/myaccount/auto-scaling/how-to/resize-stop-or-start-a-scale-group/#stop-the-scale-group).

## Can I remove one particular node from a scale group?

No. You set how many nodes run, and the scale group chooses which nodes it removes. See
[Resize the scale group](/myaccount/auto-scaling/how-to/resize-stop-or-start-a-scale-group/#resize-the-scale-group).

## Why does the scale group's node count differ from what I set?

Because the policies add and remove nodes, while **Desired nodes** keeps the last count you set, by
hand or at creation. **Active Node Details** lists the nodes running now, and **Audit Logs** records
each scaling step. See
[Monitor a scale group](/myaccount/auto-scaling/how-to/monitor-a-scale-group/#see-the-nodes).

## What can make a scale group scale?

CPU use or a schedule. An elastic policy scales on **CPU**, and a scheduled policy scales at the
times you set, in India Standard Time (IST). **Elastic and Scheduled Policy** uses both. See
[Set an elastic policy](/myaccount/auto-scaling/how-to/set-an-elastic-policy/).

## Can a scale group scale on memory use?

No, not in the portal. The elastic policy scales on **CPU**. To scale on memory or another
measurement, watch it with your own monitoring and set the count with **Resize Service**. See [Set
an elastic policy](/myaccount/auto-scaling/how-to/set-an-elastic-policy/#choose-the-parameter).

## Can I set more than one schedule?

No. A scheduled policy has one **Upscale Recurrence** and one **Downscale Recurrence**, each with
its own number of nodes. To also scale on load, choose **Elastic and Scheduled Policy**; both
policies then work within the same **Minimum Node** and **Maximum Node**. See
[Set a scheduled policy](/myaccount/auto-scaling/how-to/set-a-scheduled-policy/).

## Which load balancer can I put in front of a scale group?

An Application Load Balancer (ALB), with **Backend Type** set to **Auto Scale Group**. See
[Put a load balancer in front of a scale group](/myaccount/auto-scaling/how-to/add-a-load-balancer/).

## Do new nodes join the load balancer by themselves?

Yes. E2E adds each node to the load balancer when it starts running, and takes it off when it is
removed. The load balancer sends traffic to each node's private IP on the **Scaler Port**.
**Health Check** is on by default. The load balancer skips any node that fails the check: a node passes when it answers a `HEAD /` request on the **Scaler Port** with a success status, such as 200 OK. See
[Put a load balancer in front of a scale group](/myaccount/auto-scaling/how-to/add-a-load-balancer/).

## Why are my scale group nodes not on the Nodes page?

They are listed on the scale group's own **Active Node Details** tab. See
[Monitor a scale group](/myaccount/auto-scaling/how-to/monitor-a-scale-group/#see-the-nodes).

## Can I turn on encryption for an existing scale group?

No. You can turn on encryption only when you create the scale group, and it stays on for the life of the
scale group. To encrypt the nodes, create a new scale group with **Enable Encryption** on. See
[Encrypt the nodes](/myaccount/auto-scaling/how-to/create-a-scale-group/#optional-encrypt-the-nodes).

## Why are Stop and Delete not available?

They depend on the scale group's status. **Stop** is available while the scale group reads **Running**, and
**Delete** while it reads **Running**, **Stopped**, **Failed**, or **Failed Deleting**. For every state, see the table in
[Read the scale group's status](/myaccount/auto-scaling/how-to/monitor-a-scale-group/#read-the-scale-groups-status).
Your role in the current project also needs the update permission for **Stop** and the delete
permission for **Delete**. See
[Stop, Start, Delete, or Resize Service is not available](/myaccount/auto-scaling/troubleshooting/auto-scaling/#stop-start-delete-or-resize-service-is-not-available).

## What do I do when a scale group shows Failed Scaling?

Wait, refresh **Manage Auto Scaling**, and read the latest entry on the scale group's **Audit Logs**
tab. While the scale group reads **Failed Scaling**, **Resize Service**, **Stop**, **Start**, and
**Delete** are not available. If it still reads **Failed Scaling**,
[contact support](/myaccount/auto-scaling/troubleshooting/auto-scaling/#contact-support). See
[The scale group shows Failed Scaling](/myaccount/auto-scaling/troubleshooting/auto-scaling/#the-scale-group-shows-failed-scaling).

## What does a scale group cost?

A scale group has no charge of its own. Each node is billed like any node on its plan, by the minute,
from when it starts until it is removed. Scale groups use hourly billing only, with no committed
pricing. For
current prices, see [E2E's pricing page](https://www.e2enetworks.com/pricing).

## Am I charged while a scale group is stopped?

No, not for nodes. A stopped scale group has none, so you pay nothing for them. Your saved image, load
balancer, VPC, and any other product you use with the scale group are still billed. See
[Stop the scale group](/myaccount/auto-scaling/how-to/resize-stop-or-start-a-scale-group/#stop-the-scale-group).

## Can I delete the saved image a scale group uses?

Yes, once no scale group uses it. First delete every scale group built from the image. Deleting a scale group leaves its saved image in place, so you then delete the image yourself. See
[Delete a scale group](/myaccount/auto-scaling/how-to/delete-a-scale-group/).