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Category: HowTos
30 May 2025
Puppet Custom Types and Providers
Introduction Puppet is a software configuration management solution to manage IT infrastructure. One of the first things to be learnt about Puppet is its domain-specific language – the Puppet-DSL – and the concepts that come with it. Users can organize their code in classes and modules and use pre-defined resource types to manage resources like […]
19 March 2025
Using FreeIPA and Certmonger with EC Keys
Overview Infrastructures that offer services via TLS often require an automated mechanism for the regular exchange of certificates. This can be achieved, among other things, by using Certmonger and FreeIPA. By default, a FreeIPA server is configured to create certificates using a profile with RSA keys. However, if cryptographic requirements exist that, for example, necessitate […]
15 October 2024
TOASTed JSONB data in PostgreSQL: performance tests of different compression algorithms
TOAST (The Oversized Attribute Storage Technique) is PostgreSQL‘s mechanism for handling large data objects that exceed the 8KB data page limit. Introduced in PostgreSQL 7.1, TOAST is an improved version of the out-of-line storage mechanism used in Oracle databases for handling large objects (LOBs). Both databases store variable-length data either inline within the table or […]
11 October 2024
Migrating from Redis to Valkey: A Guide to the Future of In-Memory Key-Value Databases
Introduction Redis is a widely popular in-memory key-value high-performance database, which can also be used as a cache and message broker. It has been a go-to choice for many due to its performance and versatility. Many cloud providers offer Redis-based solutions: Amazon Web Services (AWS) – Amazon ElastiCache for Redis Microsoft Azure – Azure Cache […]
20 September 2024
The Art and Science of AI Prompt Engineering
Artificial Intelligence (AI) is often regarded as a groundbreaking innovation of the modern era, yet its roots extend much further back than many realize. In 1943, neuroscientist Warren McCulloch and logician Walter Pitts proposed the first computational model of a neuron. The term “Artificial Intelligence” was coined in 1956. The subsequent creation of the Perceptron […]