[Yandex Cloud documentation](../../../../index.md) > [Yandex Compute Cloud](../../../index.md) > [Concepts](../../index.md) > [Instance groups](../index.md) > Updating > Overview

# Updating instance groups


Creating and updating instances in a group is done in two steps:
1. Instances are [allocated to zones](zones.md).
1. The [deployment algorithm](deploy.md) starts.

In all availability zones, similar numbers of instances are updated at the same time.

To learn about the implications of updating or changing an instance group, see the [update rules](instance.md).

{% note info %}

You cannot update an instance group with [paused processes](../stopping-pausing.md) (its [status](../statuses.md#group-statuses) is `PAUSED`).

{% endnote %}

## Use cases {#examples}

* [Updating an instance group under load](../../../tutorials/updating-under-load.md)