All Stories

Doing data quality checks using the SQLCheckOperator

How to use SQLCheckOperator to verify that the database contains an expected number of rows
Bartosz Mikulski
20 Oct 2020

How to deal with the jinja2 TemplateNotFound error in Airflow

How to fix the TemplateNotFound error while using a custom Airflow operator
Bartosz Mikulski
19 Oct 2020

How to postpone Airflow DAG until files get uploaded into an S3 bucket

How to use Airflow sensors to detect that files have been uploaded into an S3 bucket
Bartosz Mikulski
18 Oct 2020

What is the difference between a transformation and an action in Apache Spark?

What is an action in Apache Spark? What do you understand as transformations in Apache Spark?
Bartosz Mikulski
17 Oct 2020

Use LatestOnlyOperator to skip some tasks while running a backfill in Airflow

How to skip some tasks when backfilling a DAG in the past
Bartosz Mikulski
16 Oct 2020

Christopher Bergh - How the DataOps principles help data engineers make data pipelines trustworthy

An interview with Christopher Bergh who explains how the DataOps principles help data engineers make data pipelines trustworthy
Bartosz Mikulski
16 Oct 2020

How to retrieve the statuses of the recent DAG executions from Airflow database

How to make a dashboard that displays Airflow DAG statuses
Bartosz Mikulski
15 Oct 2020

How to find and terminate an idle Redshift session

How to find the idle session that is blocking the connection pool in Redshift
Bartosz Mikulski
14 Oct 2020

How to configure Spark to maximize resource usage while using AWS EMR

How to configure EMR to use all available resources when running a Spark cluster
Bartosz Mikulski
13 Oct 2020

How to use AWSAthenaOperator in Airflow to verify that a DAG finished successfully

How to check that an AWS Athena table contains data after running an Airflow DAG.
Bartosz Mikulski
12 Oct 2020

How to start an AWS Glue Crawler to refresh Athena tables using boto3

How to create and start an AWS Glue Crawler from Python code using boto3
Bartosz Mikulski
11 Oct 2020

How to retrieve the table descriptions from Glue Data Catalog using boto3

How to get the comments from the create table statements when the metadata is stored in the Glue Data Catalog
Bartosz Mikulski
10 Oct 2020
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