How to Convert XML to PARQUET?
To Convert XML to PARQUET format can be achieved either through automated enterprise tools or customized ETL scripts: Automated Enterprise Software:…
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Why Data Reconciliation Matters in AWS Glue: Finding Missing Records with Anti Joins
A pipeline can be green and still have a data problem. This is one of the things I learned while working with data pipelines. A Glue job can complet…
Stream 50 million rows without OOM: Lazy chunked Query Streaming.
Stream 50 million rows without OOM: Lazy chunked Query Streaming. Day 09 of the WClickHouse Open-Source Engineering Series. You don't need 64GB of R…
From Pandas DataFrame to ClickHouse in milliseconds without SQL loops.
Day 05 of the WClickHouse Open-Source Engineering Series. Never use df.iterrows() to insert data into an analytical database. WClickHouse insert_dat…
Zero-copy columnar transfer: Apache Arrow meets ClickHouse in Python.
Day 04 of the WClickHouse Open-Source Engineering Series. Row serialization is the biggest bottleneck in Python analytics. WClickHouse insert_arrow(…
Never create 1-row ClickHouse parts again: The built-in Buffer Manager.
Day 03 of the WClickHouse Open-Source Engineering Series. You don't need a Redis cluster just to protect ClickHouse from single-event streaming writ…
Modern Data Lakehouses: How Apache Iceberg Solved the Pitfalls of Hive Metastore
Introduction When a data platform grows from a few gigabytes to terabytes or petabytes, storing the data is only one part of the problem. A typical…
Sharing memory between processes with java.lang.foreign and jextract
Java Foreign Function and Memory API ( java.lang.foreign ) is a powerful tool that you can use to take advantage of various OS-specific optimization…
[EN] Data Driven/Big Data Series #1: Apache Kafka and Elastic Stack Roles
This is the first in a series exploring the roles of Search and Streaming technologies within the Data Driven (Big Data) environment. In this post,…
Apache Data Lakehouse Weekly: August 5 - August 12, 2026
This Week at a Glance The Iceberg community opened a formal scoping discussion for the v4 table spec, with Daniel Weeks laying out three workstream…
От 12 часов к 30 минутам: как мы join’им миллиарды товарных движений в ClickHouse
Всем привет! Меня зовут Муса. Наша команда занимается витринами данных по товарному учёту. Каждый день мы доставляем около 10 млрд записей…
От legacy до промышленной платформы: инженерная эволюция OSA в «Магнит»
Как мы провели проект через четыре «эпохи» — от ручных запусков на Windows‑планировщике до Spark + k8s на масштабе сет…
Event Sourcing в платформе данных: миграция с JSON на Avro
Иногда legacy живёт в компании годами не потому, что он плох, а потому что «работает — не трогай». Но однажды поя…
The Future of Query Optimization: AI-Driven Insights in Big Data
Query optimization has never been a solved problem. The moment you think your database is running efficiently, data volumes triple, access patterns…
The Next Decade of Data Engineering: From Modern Data Stack to Data Engineering Harness
Over the past decade, the core evolution of data engineering has been the deconstruction and reconstruction of traditional data warehouse architectu…