---
title: "VAST Cluster 5.4.5 Release Notes"
slug: "vast-cluster-5-4-5-release-notes"
tags: ["5.4"]
updated: 2026-10-28T01:52:43Z
published: 2026-10-28T01:52:43Z
canonical: "docs.vastdata.com/vast-cluster-5-4-5-release-notes"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vastdata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# VAST Cluster 5.4.5 Release Notes

This release is only available for VAST on Cloud clusters.

- [New Features](/docs-5-4/docs/vast-cluster-5-4-5-release-notes#new-features)
- [Enhancements](/docs-5-4/docs/vast-cluster-5-4-5-release-notes#enhancements)
- [Limitations](/docs-5-4/docs/vast-cluster-5-4-5-release-notes#limitations)

## New Features

### VoC on AWS

VAST Cluster 5.4.5 introduces support for Polaris-based VAST on Cloud deployments on Amazon AWS.

To deploy a VoC cluster on AWS:

- Ensure that your AWS account is configured with sufficient privileges.
- Ensure that your local host has networking set up with the required ports open.
- Sign in to the [VAST Polaris for AWS portal](https://admin.aws.polaris.vastdata.com).
- Use VAST Polaris UI and VAST on Cloud CLI (`vastcloud`) to create a new AWS deployment.

For complete guidance and configuration details, see [VAST Polaris Administrator's Guide](/docs-5-4/docs/vast-polaris).

## Enhancements

### Networking

- Added user controls to manage allocation of virtual IP pools and DNS in VoC environments:
  - In VAST CLI, the `vippool allocate`, `vippool reallocate`, `dns allocate` commands
  - In VAST REST API, the `/vippools/allocate/`, `/vippools/<pool ID>/reallocate/`, `/dns/allocate/` endpoints.

## Resolved Issues

### VAST on Cloud (VoC)

- ORION-405554: Introduced an internal change to ensure that VAST on AWS clusters get AWS permissions required to take advantage of one of the upcoming features.

### VAST REST API

- ORION-409117: Made updates to ensure that users with the read-only administrative role cannot perform folder management actions via the respective VAST REST API endpoints.

## Limitations

### VAST on Cloud (VoC)

- VAST Cloud (Polaris) UI does not provide an option to run a cluster upgrade. Cluster upgrades are to be performed using the VAST Web UI.
- VAST on Cloud clusters do not support OS upgrade.
- In the event of downtime, data is rebuilt while the cluster comes back online. In case of a subsequent failure during the rebuild, data integrity is not guaranteed.
- ORION-327048: For VoC on GCP, it is recommended to have a multiple of 8 non-VMS VMs per cluster, since GCP has 8 failure domains and imbalance may result in failed stripe allocations.
- ORION-145141: Creating a tenant with EKM encryption is not supported on VoC clusters.
- ORION-113036: After you reregister the same VoC cluster in Uplink, information about the previously registered instance of this cluster is no longer available in Uplink.