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PowerShell and Oracle – a good team
Andreas Jordan
Data Management
I use PowerShell almost daily to access data in Oracle databases. Why, especially in this combination, I want to present by means of an example. But first there will be a few words about the used technology.  Why PowerShell?  Quite simply: Because it's there. Completely without the installation of additional components, PowerShell is pres...
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Harnessing the power of Kafka
Muriel Djanko Kamdoum
Data Management
Is there more to Kafka than the usual producer and consumer APIs? Kafka, the event streaming platform, is usually known for its producer and consumer APIs allowing applications to write, store and retrieve events from the platform in a decoupled way. In the age of ubiquity of compute resource and huge volume of data being generated, it offers the p...
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Certificate watcher with telegraf and Grafana?
Janis Ax
Englisch
One of our customers uses self-signed certificates for some internal processes. From a technical perspective, they work as expected. Problems arise after about one year, when the certificates expire. Since they are not officially signed, no one watches them to check when they expire. I was wondering if there was a way to set up an easy watch and al...
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Let’s plan it – Scheduling in Apache NiFi
Janis Ax
Data Management
One key feature of Apache NiFi is scheduling. NiFi dataflows should cover streaming and batch use cases. But how can we connect both worlds together, and what settings are available? In this blog, we want to check the scheduling possibilities and show how to use them correctly. General scheduling options  The dataflow engineer has in total two...
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A little less please: MySQL „partial revokes“
Matthias Jung
Data Management
Granting permissions on databases can be a tedious job. Especially assigning restrictive permissions à la "you may read all tables except for the information in database XYZ" was laborious. For such a task, the SELECT rights had to be defined for all databases that the user should be able to read. The unwanted database was simply given no rights. O...
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Better be safe than sorry or how to "cluster" clusters. MySQL InnoDB ClusterSets
Matthias Jung
MySQL (PDO)
We have already reported several times about the MySQL InnoDB Cluster and the associated components such as the MySQL Shell and the MySQL Router (e.g., https://blog.ordix.de/mysql-shell-cluster-your-application-in-40-minutes). With version 8.0.28 there is another innovation in this "triumvirate". The InnoDB ClusterSets. This allows the DBA to comfo...
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