NimbusBackup Blog

The Windows client for PBS now encrypts in the proxmox-backup-client format, with the encryption developed by tizbac; signed binaries, paper key, parallel backups.

The PBS 4.2 S3 datastore: local cache, copying an existing datastore, real cost in requests and egress, and why Object Lock is not supported.

What verification reads, its disk read cost, Skip Verified and Re-Verify After, the case of synced backups, and what a successful verify does not prove.

Create the key, keep it off the system being backed up (paperkey), set up the RSA master key, and what changes on a single node or a cluster.

4 MiB chunks, datastore scope, the effect of encryption, how to read the deduplication factor, and our dated measurements on MariaDB and Windows.

Error messages from the PBS client and the Windows client, taken from the PBS 4.2.8 code, the official forum and our own reproductions: cause, diagnostic command and fix.

Offline copy of a Proxmox Backup Server datastore with zfs send and zfs receive over SSH: the copy pulls, production never pushes. Commands, incremental options, pitfalls.

Move a Proxmox Backup Server datastore to a new server with zfs send, live: read-only cutover, accounts carried over with no password change, TLS fingerprint, verification.

A disk comes out of the safe, a server is gone: reactivate a Proxmox Backup Server datastore on a fresh PBS, grant access, declare it in Proxmox VE and prove you can restore.

Debian, Ubuntu, RHEL, Rocky, Alma, Fedora, Arch and Alpine, on amd64 and arm64: install the official client, connect it to your PBS with an API token, then encrypt, schedule and restore.

On 4 September 2026, tizbac merged our Windows GUI for PBS into his repository: what landed upstream and how the two repositories now fit together.

New in Nimbus Backup 0.3: install and configure Windows-to-PBS backup entirely from files, no clicks. Two paths (CLI + service/GUI), reliable exit codes, ready-to-use Ansible playbooks and config examples.

The NimbusBackup agent (Go + Wails, open source GPL-3.0) is sometimes wrongly flagged by Windows Defender or SmartScreen. VirusTotal confirms 0 detections. We explain the heuristic mechanism, SHA-256 / VirusTotal verification, and where code signing stands.

First full backup of 876 GB on a Windows bare metal server to PBS using our open source GUI client: 20h30 transfer time, 75% deduplicated chunks, 57% end-to-end savings. Raw figures, honest reading.

Backup as a Service in France: why separate backup operator from production. GDPR, NIS2, 3-2-1 rule, ransomware cost vs BaaS. Decision guide.

Per-socket license or volume-based pricing? Compare Veeam, Acronis, PBS to choose the right model for your infrastructure (SMB, Mid-market, Enterprise). ROI calculator included.

Free open-source GUI to back up Windows Server, SQL Server and workstations to Proxmox Backup Server: VSS snapshots, schedules, restore, Windows service.

Complete guide to create, use and delete API authentication tokens on your NimbusBackup PBS. Secure access to your datastores for Windows servers, Linux servers and workstations.

Backup as a Service (BaaS) for Proxmox: account segregation, principle of least privilege, full delegation. NIS2/ANSSI compliance.

Complete guide to configuring PBS replication. Sync remote to NimbusBackup or between your own PBS instances: push vs pull mode, proxmox-backup-manager commands and best practices.

Illustrated tutorial to connect your NimbusBackup PBS to Proxmox VE. Adding storage, configuring the backup job, first backup test and restore.

Step-by-step tutorial to configure backup of your Proxmox VE VMs. Local PBS, replication, offsite backup: best practices.

GDPR imposes strict obligations on data backup. EU hosting, encryption, right to erasure: guide to compliant backups.

OVH SBG2 fire in 2021: 30,000 servers destroyed. How geo-replicated backup across 2 PBS sites protects your data.

Offsite Proxmox backup pricing comparison. Hosted PBS and Nimbus Backup Gateway: tiered pricing and selection guide.

PBS vs Veeam comparison for Proxmox VE. Features, costs, native integration, deduplication. Guide to help you choose.

Immutable backup (WORM): why traditional backups are no longer enough against ransomware. Air-gapped vs immutable.

NIS2 directive backup requirements. Obligations, affected sectors and achieving backup compliance.

Discover current best practices for securing your Proxmox VE backups: air-gapped backup, immutable storage, and strategies compliant with industry standards.