Consulting
Speaker
Bartosz Mikulski
#makeDataTrustworthy - because AI cannot learn from dirty data
Featured
PySpark-Check - data quality validation for PySpark 3.0.0
Last week, I was testing whether we can use AWS Deequ for data quality validation. I ran into a few problems. First of all, it...
The problem with software testing in data engineering
What if we found a bug in our data pipelines? What if that bug were easy to fix, but it would require a lot of...
Data flow - what functional programming and Unix philosophy can teach us about data streaming
What does stream processing have in common with functional programming and Unix?
Four books to boost your programmer career in 2020
I quit my dream job because of a book
All Stories
Why your company should use PrestoSQL
Should your team use PrestoSQL?
Is counting rows all we can do?
How to detect problems in data pipelines before they turn into hard to debug bugs? I wish I knew.
How to Speed Up AWS Athena Queries Using Partition Projection
How to define partition projection while creating an Athena table
How to send a customized Slack notification when an Airflow task fails
How to customize a Slack notification before sending it to the Slack incoming webhook.
How to use one SparkSession to run all Pytest tests
How to speed us Pytest tests by reusing the same SparkSession in all of them
How to send AWS CloudWatch Alerts to a Slack channel using Terraform
How to use Terraform to configure a CloudWatch alert and send the message to a Slack channel.
PySpark-Check - data quality validation for PySpark 3.0.0
Last week, I was testing whether we can use AWS Deequ for data quality validation. I ran into a few problems. First of all, it was using an outdated version...
Measuring data quality using AWS Deequ
How to measure data quality in Athena tables using AWS Deequ running on an EMR cluster.
How to conditionally skip tasks in an Airflow DAG
How to use XCom and PythonSensor to skip remaining tasks in an Airflow DAG.
The problem with software testing in data engineering
What if we found a bug in our data pipelines? What if that bug were easy to fix, but it would require a lot of time spent backfilling the data?...
How does Kafka Connect work?
In this article, I am going to describe the internals of Kafka Connect, explain how it uses the Sink and Source Connectors, and how it tracks the offsets of the...
Why my Airflow tasks got stuck in "no_status" and how I fixed it
A story about debugging an Airflow DAG that was not starting tasks
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