Virtualization Archives - Page 2 of 16 - ITFROMZERO

ESXi Host Configuration Backup and Restore with PowerCLI and ESXCLI: Saving Your Virtualization Cluster During Outages

By IT From Zero October 26, 2026

A step-by-step guide to backing up and restoring ESXi host configurations using ESXCLI and PowerCLI. Learn how to recover failed hosts in 10-15 minutes during hardware outages.

Virtualization

Guide to VFIO PCIe Passthrough on Linux KVM: GPU Passthrough for Windows VMs

By IT From Zero October 26, 2026

Configure VFIO PCIe Passthrough on Linux KVM to harness up to 98% of dedicated NVIDIA/AMD GPU performance in a Windows VM. Comprehensive guide covering vfio-pci driver binding, fixing Code 43, and CPU pinning to eliminate micro-stutter.

Virtualization

Configuring SR-IOV on KVM/Proxmox: Share 10GbE NICs with Near Bare-Metal Performance

By IT From Zero October 24, 2026

A comprehensive guide to configuring SR-IOV on Proxmox/KVM to split 10GbE NICs into Virtual Functions. Achieve 9.4 Gbps throughput, reduce host CPU usage below 5%, and drop latency to 0.05ms.

VMware

How to Reclaim Storage Space (Space Reclamation / UNMAP) on VMware ESXi

By IT From Zero October 24, 2026

Is your VMware ESXi datastore still full after deleting hundreds of gigabytes inside VMs? Here is a practical, step-by-step guide to reclaiming storage space (UNMAP / Space Reclamation) for Thin VMDKs safely.

Virtualization

Optimizing KVM Networking with virtio-net Multiqueue and vhost-net: Hitting Full 10GbE Without CPU Bottlenecks

By IT From Zero October 23, 2026

KVM virtual machine stuck at 2 Gbps on a 10GbE network? A single-queue virtio setup is usually to blame. Learn how to configure virtio Multiqueue and vhost-net to unlock full 9.4 Gbps throughput without overloading your vCPUs.

Virtualization

Guide to Using Tart on macOS Apple Silicon: Create and Manage CLI Virtual Machines for CI/CD

By IT From Zero October 23, 2026

A guide to using Tart on Apple Silicon: create, clone, and automate macOS and Linux VMs via an OCI-compliant CLI, optimized for CI/CD runners and local testing.

Virtualization

How to Install and Configure Proxmox Backup Server (PBS): Deduplication and Client-Side Encryption

By IT From Zero October 21, 2026

A technical comparison of VZDump, ZFS Send, and Proxmox Backup Server (PBS). Learn how to set up PBS with client-side encryption and deduplication saving up to 80% storage.

Virtualization

Configuring a Corosync Redundant Network (Dual Ring) on Proxmox VE to Prevent Split-Brain

By IT From Zero October 19, 2026

A step-by-step guide to configuring Corosync Dual Ring on Proxmox VE. Learn how to deploy a redundant network with Kronosnet to protect your High Availability cluster from lost quorum and split-brain scenarios.

Virtualization

Migrating VirtualBox VMs to KVM/Proxmox VE: Converting VDI to QCOW2 and Fixing VirtIO Boot Errors

By IT From Zero October 19, 2026

Experiencing a BSOD or boot freeze after migrating VirtualBox to KVM/Proxmox VE? Learn how to convert VDI to QCOW2 with qemu-img and properly inject VirtIO drivers for both Windows and Linux.

Virtualization

How to Configure KVM Nested Virtualization on Linux: Enable Nested Virtualization for Proxmox, VMware, and OpenStack Labs

By IT From Zero October 18, 2026

Encountering 'KVM acceleration not available' when installing Proxmox or ESXi inside a Linux VM? Here is how to configure KVM Nested Virtualization for nested labs.