Monday, January 5, 2026

Using iperf3 and Prometheus for WAN link monitoring

I have multiple FreeBSD routers across my environments across the world each having its own WAN (Internet) connectivity and using WireGuard VPN to connect all into a private network. 

I would like to do

  • local monitoring of Internet connectivity on each router
  • centralized monitoring of Internet connectivity of each router in my datacenter 

The solution is pretty simple and I will describe it on this blog post.

Friday, December 12, 2025

FreeBSD High-Performance Network Stack Tuning Guide

The default FreeBSD configuration is optimized for compatibility, not maximum network throughput. This becomes visible especially during iperf testing, routing benchmarks, or high-traffic workloads where mbuf exhaustion or CPU bottlenecks can occur. Let's discuss various turnings.

Sunday, December 7, 2025

ZFS - Storage Provisioning

ZFS (Zettabyte File System) is a combined filesystem and volume manager, originally developed by Sun Microsystems for Solaris and now widely used on FreeBSD and other Unix-like systems.

In this blog post, we will describe ZFS and examples how to use it.

Saturday, November 29, 2025

MinIO on FreeBSD

MinIO is a high-performance, S3-compatible object storage platform designed for scalability, resilience, and simplicity in modern cloud-native environments. Its lightweight architecture and impressive throughput make it a popular choice for both on-premises and hybrid deployments, especially when building distributed storage clusters. In this post, I’ll briefly introduce MinIO and then walk through the test environment of a six-node MinIO cluster, exploring how it behaves, performs, and scales in a real-world lab setup.

This test environment is part of potential 1 PB+ S3 Storage system. The conceptual design  of system is depicted below.

Conceptual Design - S3 Object Storage

Proof of Concept is always good idea before the final system is professionally designed. In this blog post I described the first ultra small virtualized environment to test MinIO concept.

Saturday, November 22, 2025

FreeBSD - Basic Operational Procedures

FreeBSD is a free, open-source operating system based on the Berkeley Software Distribution (BSD), a branch of UNIX developed at the University of California, Berkeley. It’s known for being stable, secure, highly performant, and extremely well-suited for servers, networking, storage, and appliances.

Relevant blog post: Typical tasks after FreeBSD installation

In this blog post I will document basic FreeBSD 14.3 operational procedures. 

These operational procedures are

  • Security Operations
  • Lifecycle (Update and Upgrade) of Operating System
  • IP Settings
  • Date and Time Operations
  • IP Firewall Operations

Let's focus on basic operational procedures ...