Posted inMySQL
MySQL Isolation Levels: Don’t Let Transactions Ruin Your Data
Dirty Read, Non-repeatable Read, and Phantom Read are classic database errors. Learn how MySQL uses four Isolation levels to protect your data.
Posted inVMware
Speed Up VMware VMs: Switching to Virtual NVMe to Unleash SSD Performance
Don't let legacy controllers slow down your SSD. A detailed guide on switching to Virtual NVMe on VMware to reduce latency and boost IOPS for Windows/Linux VMs.
Posted inVMware
Configuring VMware vSphere Fault Tolerance (FT): Achieving Zero Downtime for Mission-Critical Systems
A detailed guide to configuring VMware vSphere Fault Tolerance (FT). Learn how to achieve Zero Downtime, hardware requirements, and practical tips to protect your most critical systems.
Posted inVirtualization
Deploy a VyOS Virtual Router on Proxmox/KVM: Firewall, NAT, and Site-to-Site VPN from A to Z
A hands-on guide to deploying a VyOS virtual router on Proxmox or KVM, covering stateful zone-based firewall, NAT masquerade, port forwarding, and IPsec IKEv2 Site-to-Site VPN. Follows a practical workflow from installation to a production-ready lab network.
Posted inVMware
Configuring vCenter Server High Availability (vCenter HA): Eliminating the Single Point of Failure in Your vSphere Environment
A step-by-step guide to configuring vCenter Server High Availability (vCenter HA) on VCSA 8.0, covering the Active-Passive-Witness architecture, HA network configuration, failover testing, and practical operational tips from a production environment. Eliminate the single point of failure in your vSphere management layer with automatic failover in 4–8 minutes.
Posted inCentos
How to Use sosreport on CentOS Stream 9: Collect and Analyze System Information for Professional Troubleshooting
sosreport is Red Hat's official tool for collecting complete system information with a single command, replacing the need to run dozens of manual commands every time an incident occurs. This article compares different approaches to information gathering, weighs their pros and cons, and walks through a practical sosreport deployment on CentOS Stream 9 — including a script you can integrate directly into your incident response workflow.
Posted inNetwork
Configuring iSCSI Multipathing on Linux: Maximize Bandwidth and SAN Connection Redundancy
A complete guide to configuring iSCSI Multipathing on Linux, from basic setup to advanced tuning: establish multiple parallel connections to SAN storage to increase bandwidth and ensure redundancy when a path fails. Covers load balancing configuration, jumbo frames, real-world failover testing, and troubleshooting.
Posted inVirtualization
QEMU Guest Agent: Installation and Configuration on Linux/Windows for Consistent Snapshots and VM Monitoring
QEMU Guest Agent (qemu-ga) is a daemon running inside the VM that freezes the filesystem before snapshots are taken, ensuring data consistency and preventing corruption on restore. This guide covers installation on Linux and Windows, configuration with KVM/libvirt and Proxmox, plus troubleshooting for common issues.
Posted inMySQL
Fixing MySQL Connection Errors: From 1045 to ‘Too Many Connections’ – Real-World Stories and Solutions
Fix MySQL errors 1045, 2002, and Too Many Connections with hands-on, real-world guidance. Learn how to accurately diagnose problems and optimize database connections based on practical experience.
Posted inVMware
vCenter Backup: Why Snapshots Aren’t Enough and a Guide to Setting Up File-Based Backup Properly
Learn how to configure File-Based Backup for VMware vCenter (VCSA) to protect your management system. A detailed guide from automated setup to real-world recovery.