Hellmar Becker's Blog
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  • Sending automatic email reports from Imply Pivot

    Jul 31, 2021 • blog, imply, druid, business-intelligence

    Imply Pivot has the built in capability to send scheduled email reports on a regular basis. However, a few things need to be configured correctly in order to make this work. Here is a comprehensive list of the required settings.

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  • Summary of Druid native query options

    Jan 21, 2021 • blog, imply, druid

    Druid’s native query language supports five distinct query types. Each of these query types requires that certain attributes be set in the query JSON object.

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  • Generating IBAN numbers for simulated financial transactions

    May 13, 2020 • blog, perl, testing, financial, realtime, graph

    Financial transactions present a whole lot of interesting technology use cases.

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  • Attaching a webcam to a virtual machine using Vagrant and VirtualBox

    May 3, 2020 • linux, windows, virtualization

    It all started with the virtual chroma screen function of Zoom, which does not work on older laptops that do not have a beefy CPU. So, one day on Hacker News, I found an article by Ben Elder that describes how to set up your own virtual webcam on Linux.

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  • A simple way to generate IoT test data

    Apr 25, 2020 • blog, perl, iot, dataflow, nifi

    A while ago, I was called to do a presentation at a large manufacturer of wind turbines. You might have a couple of those installed in the fields around your town if you live in the German countryside, but the more lucrative way of deploying turbines is in offshore windparks.

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