Recent Posts

Apache Beam Summit 2022

15 minute read

Last week I virtually attended Apache Beam Summit 2022 held in Austin, Texas. The event concentrates around Apache Beam and the runners like Dataflow, Flink, Spark or Samza. Below you can find my overall impression of the conference and notes from several interesting sessions. If some aspect was particularly appeal...

FinOps for data pipelines on Google Cloud Platform

25 minute read

Do you check costs of the data pipelines in exactly the same way as you check overall health, latency or throughput? Nowadays, taking care of cost efficiency is an integral part of every data engineer job. I would like to share my own experiences with applying FinOps discipline in the organization within tens of da...

GCP Dataproc and Apache Spark tuning

8 minute read

Dataproc is a fully managed and highly scalable Google Cloud Platform service for running Apache Spark. However, “managed” doesn’t relieve you from the proper configuration to squeeze more processing power for less money. Today you will learn the easiest method to configure Dataproc and Spark together to get optimal...

GCP Cloud Composer and Apache Airflow tuning

15 minute read

I would love to only develop streaming pipelines but in reality some of them are still batch oriented. Today you will learn how to properly configure Google Cloud Platform scheduler – Cloud Composer.

Stream processing – part 2

23 minute read

This is the second part of the stream processing blog post series. In the first part I presented aggregations in a fixed, non-overlapping windows. Now you will learn dynamic aggregations in data-driven windows, for which the size of each window depends on the input data instead of a predefined time based pattern. At...

Stream processing – part 1

17 minute read

This is the first part of the stream processing blog post series. From the series you will learn how to develop and test stateful streaming data pipelines.

Kafka Streams DSL vs processor API

29 minute read

Kafka Streams is a Java library for building real-time, highly scalable, fault-tolerant, distributed applications. The library is fully integrated with Kafka and leverages Kafka producer and consumer semantics (e.g: partitioning, rebalancing, data retention and compaction). What’s unique, the only dependency to r...

Apache BigData Europe 2016

10 minute read

Last week I attended Apache Big Data Europe held in Sevilla, Spain. The event concentrates around big data projects under Apache Foundation umbrella. Below you can find my overall impression on the conference and notes from several interesting sessions. The notes are presented as short checklists, if some aspect w...

Long-running Spark Streaming jobs on YARN cluster

16 minute read

A long-running Spark Streaming job, once submitted to the YARN cluster should run forever until it’s intentionally stopped. Any interruption introduces substantial processing delays and could lead to data loss or duplicates. Neither YARN nor Apache Spark have been designed for executing long-running services. But th...