One of the advertised advantages of renting bare metal servers in the cloud compared to using virtual machines on dedicated or shared hardware is their better performance. That sounds right but how much faster is an entry level bare metal server in a data center with a few CPU cores compared to virtual machines running … Continue reading Bare Metal Cloud – Part 5 – Performance Comparison to Virtual Machines
When you are working with virtual machines in the cloud, I’m sure you’ve come across a situation in which you thought you had a great idea to reconfigure the network stack and ended up with the VM not being reachable anymore. As a last resort, one can always turn to the virtual machine manager and … Continue reading Bare Metal Cloud – Part 4 – Getting a Serial Console When the Network is Broken
In the previous post on the topic, I’ve had a look at how several virtual machines on my bare metal cloud server in a data center can share a single public IPv4 address. Public IPv4 addresses are expensive these days, so in many cases, sharing an IPv4 address and using non-standard ports for web servers … Continue reading Bare Metal Cloud – Part 3 – Several Public IPs – Macvtap vs. Bridging
Building on the previous post on this topic, I will have a closer look today how to use my new and shiny bare metal server in the data center for some virtual machine fun. As the server acts as a warm standby fallback for my cloud server at home, I’ve decided to use a setup … Continue reading Bare Metal Cloud – Part 2 – KVM and NAT Port Forwarding
So far, the public cloud has pretty much been ‘virtual machines’ for me, with varying numbers of CPUs, memory and storage, depending on the application. Recently, however, I’ve been looking for a way run copies of my home cloud based virtual machines (VMs) and Docker containers in a data center for redundancy purposes. For this … Continue reading Bare Metal in the Cloud – Part 1 – Let’s Rent Hardware
I’m running four Nextcloud instances, all of them in separate virtual machines on Ubuntu 20.04. The problem: Ubuntu 20.04, despite still being rather young, comes with PHP 7.4, which has been declared end of live recently, and Nextcloud has announced that they will no longer support this PHP version in their next release. So while … Continue reading Nextcloud – Upgrading to Ubuntu 22.04
Last year I wrote about a 5G Americas whitepaper that describes how 3GPP has standardized the 5G core in a way that lends itself for cloud based implementation. In short, that means that control plane functions are split into microservices, deployed on bare metal clusters in containers and managed with Kubernetes. So far the theory. … Continue reading The Cloud Based 5GC – From Theory To Practice
When you look through the 5G core network specification documents of 3GPP such as TS 23.501 and 23.502 the idea I got was that it’s pretty much the same as before. Yes, the interfaces and network components have new names but by and large the 5G core network does the same things as today’s core … Continue reading The Cloud Native 5G Core Network
While the press and pretty much everybody focuses on ChatGPT these days, there’s another project of the same company that was recently open sourced that promises to create transcripts of video and audio files. It’s called Whisper AI. As I do get audio files every now and then for which a transcript would be helpful, … Continue reading A First Test of Whisper AI
So here we go, it’s 2023 and this blog has once more moved to another host. Initially started as a blog on Typepad in 2005, it has so far moved to a hosted server platform on which I installed WordPress (2016), to a virtual machine I could administer on my own (2018), and then, two … Continue reading Moving the Blog to ANOTHER Virtual Machine