Kobus Wolvaardt

MD at Goodx / Quant Solutions

About

I like playing with technology and love running a medical software company in South Africa

Kobus Wolvaardt has presented the following presentations

    Kobus Wolvaardt Postgres in Dockers on ZFS at Postgres Conference 2024
    How we manage a large amount of postgres DBs and clusters on ZFS spin disks in dockers.

    presented by Kobus Wolvaardt

    Our journey from large 200 database clusters on mirrored SSDs to smaller 20 to 40 databases per cluster and 4 to 10 clusters per machine on spin disks using ZFS. How we manage replication, how we backup 2500 DBs (hint ZFS snapshots) and just some of the fun things we saw on our journey.

    Wed 17 2024 Ops
    Malcolm McLean Kobus Wolvaardt Opening at South Africa 2018

    presented by Malcolm McLean and Kobus Wolvaardt

    Tue 9 2018
    Malcolm McLean Kobus Wolvaardt Panel discussion and Closing at South Africa 2018

    presented by Malcolm McLean and Kobus Wolvaardt


    video

    Tue 9 2018
    Kobus Wolvaardt Face recognition and PostgreSQL at South Africa 2018
    How to quickly find a face in a database with postgres, python and some deeplearning

    presented by Kobus Wolvaardt


    video

    Can you quickly find a one face in a million? How quickly can these queries be done?

    Tue 9 2018 Use Cases
    Kobus Wolvaardt PostgreSQL replication by example at South Africa 2018

    presented by Kobus Wolvaardt


    video

    How to setup streaming replication (using some docker fun doing it live).

    Tue 9 2018 Operations and Administration
    Malcolm McLean Kobus Wolvaardt Performance tuning PostgreSQL at South Africa 2018
    Tuning PostgreSQL isn't hard

    presented by Malcolm McLean and Kobus Wolvaardt

    Out of the box PostgreSQL comes with very conservative performance settings. In this talk, we'll look at some of the options that relate to performance and how to set them for your environment.

    Wed 10 2018 Operations and Administration
    Kobus Wolvaardt Afternoon Coffee at South Africa 2017

    presented by Kobus Wolvaardt

    Coffee

    Kobus Wolvaardt Lunch at South Africa 2017

    presented by Kobus Wolvaardt

    Lunch

    Kobus Wolvaardt Moning Coffee at South Africa 2017
    Coffee and biscuits

    presented by Kobus Wolvaardt

    Coffee

    Kobus Wolvaardt Margrit Drescher Malcolm McLean Martin Slabber Panel discussion at South Africa 2017

    presented by Margrit Drescher, Malcolm McLean, Martin Slabber, and Kobus Wolvaardt

    Discussion on Postgres usage by the participants as well as the South African postgres landscape.

    Postgres
    Kobus Wolvaardt Registration at South Africa 2017

    presented by Kobus Wolvaardt

    Registration

    Kobus Wolvaardt How we use postgresql in our medical and financial software at South Africa 2017
    How we use postgresql in our medical and financial software

    presented by Kobus Wolvaardt

    GoodX software uses PostgreSQL as a financial database backend as well as for storing patient clinical data. In addition to that we use GoodX in our medical aid transaction and workflow transaction server.

    Postgres
    Kobus Wolvaardt Some fun with JSONB and LISTEN/NOTIFY at South Africa 2017
    How we use listen/notify through websockets to refresh JSON blobs from the DB with no polling involved.

    presented by Kobus Wolvaardt

    Some fun with JSONB. How we use LISTEN NOTIFY and JSONB to do some fun stuff with our web frontend.

    Quick run through of features.

    Postgres