Proxmox Backup Server 3.3 released

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November 28, 2024

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VIENNA, Austria – November 28, 2024 – Enterprise software developer Proxmox Server Solutions GmbH (henceforth "Proxmox") today announced version 3.3 of its open-source server backup solution. The enterprise solution for backing up and restoring VMs, containers, and physical hosts supports incremental backups, deduplication, Zstandard compression, and authenticated encryption.

Enhancements in Proxmox Backup Server 3.3

  • New "push" direction for sync jobs: Sync jobs let users create offsite backups by syncing datastore contents between onsite and offsite Proxmox Backup Servers. Previously, the offsite server had to "pull" backup snapshots from the onsite server. Now, with the new "push" option, the onsite server can send backups to the offsite server, even if the offsite server can't initiate the network connection.
  • Support for removable datastores: Proxmox Backup Server stores backup snapshots in so-called datastores, and multiple datastores can be configured as needed. With this version, it is now possible to create datastores on removable storage media. Such a "removable datastore" can be used across multiple servers. Using the web interface or the command line, the storage medium can be removed by unmounting the "removable datastore." The datastore can then be re-added by remounting it—either on the same Proxmox Backup Server instance or a different one.
  • Webhook target for the notification system: The flexible notification system in Proxmox solutions uses a matcher-based approach to route notifications to various target types, allowing for granular control over when, where, and how notifications are sent. The new webhook notification target enables users to trigger HTTP requests for events like sync jobs, backup verification, or garbage collection. It supports customizable request headers and body content, allowing for seamless integration with any webhook-compatible service.
  • Faster host and container backups: When backing up host filesystems or containers from Proxmox VE to Proxmox Backup Server, it is now possible to efficiently detect files that have not changed since the last backup snapshot. When possible, unchanged files are not processed, which can make file-based backups complete faster.
  • This version is based on Debian 12.8 (“Bookworm”), but uses the newer Linux kernel 6.8.12-4 as stable default and kernel 6.11 as opt-in. The backup platform comes with ZFS 2.2.6 (with compatibility patches for Kernel 6.11).

Proxmox Backup Server seamlessly integrates into Proxmox Virtual Environment – users just need to add a datastore of the Proxmox Backup Server as a new storage backup target to Proxmox VE.

Availability

The centrally managed software stack Proxmox Backup Server 3.3 is now available for download.

The downloadable ISO image can be quickly installed on bare-metal using the installation wizard. Distribution upgrades from older versions of Proxmox Backup Server are possible via APT. It is also possible to install Proxmox Backup Server on top of Debian.

License: Proxmox Backup Server is free and open-source software, published under the GNU AGPLv3.

Support Subscriptions: For enterprise users, Proxmox Server Solutions GmbH offers a subscription-based support model, which provides access to the extensively tested Enterprise Repository, with regular updates via the web interface, as well as technical support on a subscription basis. Prices start at EUR 520 per server, including unlimited backup storage and unlimited backup-clients.

Further information:

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About Proxmox Backup Server
Proxmox Backup Server is an enterprise backup solution for backing up and restoring virtual machines, containers, and physical hosts. The open-source client-server software supports incremental backups, deduplication, Zstandard compression, and authenticated encryption. To increase productivity, the easy-to-use Proxmox Backup Server allows you to back up your data in a space-efficient manner, restore VMs, archives or single objects in a flash. With the web-based user interface, you can effectively reduce work hours thanks to simplified management. Proxmox Backup Server is licensed under the GNU AGPLv3. Enterprise support subscriptions are available from Proxmox.

About Proxmox Server Solutions
Proxmox provides powerful and user-friendly open-source server software. Enterprises of all sizes and industries use Proxmox solutions to deploy efficient and simplified IT infrastructures, minimize total cost of ownership, and avoid vendor lock-in. Proxmox also offers commercial support, training services, and an extensive partner ecosystem to ensure business continuity for its customers. Proxmox Server Solutions GmbH was established in 2005 and is headquartered in Vienna, Austria.

Contact: Daniela Häsler, Proxmox Server Solutions GmbH