A Brief History of Container Technology

Ronald Bradford
September 20, 2016

The following is the text from a presentation slide at Oracle Open World 2016.

While Docker has been playing a key role in adoption of the Linux container Technology, the did not invent the concept of containers.

2015 – OCI
- 2014 – rkt
  - 2013 – Docker
    - 2013 – LMCTFY
      - 2011 – Warden
        
        2008 – LXC
        
        2007 – AIX (6.1) WPARS
        
        2007 – cgroups in Linux Kernel (2.6.24)
        
        2006 – Process Containers
        
        2005 – openvz
        
        2004 – Solaris Zones
        
        2001 – Linux vserver
        
        2000 – FreeBSD jails
        
        1979 – Unix V7 added chroot
        DISCLAIMER: This post is only a repeat of the content of the slide and has not be verified for accuracy.

Tagged with: Docker

Producing Skewness statistics with SQL

Ronald Bradford
June 14, 2026

Skewness measures the asymmetry of a distribution. A perfectly symmetric distribution has a skewness of zero. A positive skew (right-skewed) means the tail extends to the right — a small number of high values pull the mean above the median.

Exploring the vsql-ai extension

Ronald Bradford
June 13, 2026

The vsql-ai extension adds AI prompt capabilities and text embeddings directly in SQL queries, with support for Anthropic Claude , Google Gemini , OpenAI ChatGPT , or a local LLM such as Ollama .

Producing Chi-Squared statistics with SQL

Ronald Bradford
June 12, 2026

The Chi-Squared test is one of the most widely used statistical tests for categorical data. It comes in two flavors: the goodness-of-fit test asks whether an observed frequency distribution matches an expected one, while the test of independence asks whether two categorical variables are associated with each other.