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Migrating JSON Files from AWS S3 to PostgreSQL Using AWS Glue and PySpark
Migrating JSON files from AWS S3 to PostgreSQL using AWS Glue and PySpark is one of the most common data engineering challenges teams face today. In this guide, you will learn exactly how to build a production-grade AWS Glue JSON to PostgreSQL migration pipeline — from reading raw JSON files… Read More ⇢
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5 PySpark Performance Anti-Patterns on Databricks (And How to Fix Them)
Databricks makes scaling big data processing feel almost effortless. Under the hood, however, writing PySpark without understanding how Apache Spark and Delta Lake execute your code can quietly ruin performance, spike DBU costs, and cause out-of-memory (OOM) crashes. Below are 5 common PySpark anti-patterns seen in production, along with exact… Read More ⇢
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Databricks Lakebase vs. Lakehouse vs. Data Warehouse: What’s the Difference?
Confused by Databricks Lakebase, Lakehouse, and traditional Data Warehouses? Here is a complete comparison of OLTP vs. OLAP architectures, key use cases, and when to use each. Read More ⇢
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Why Databricks Genie Ontology is the “Brain” Your Enterprise AI Was Missing
Ever wondered how AI assistants accurately answer business questions? Learn how Databricks Genie Ontology acts as a smart “translator” between raw data and AI. Read More ⇢
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PySpark + Delta Lake / Apache Iceberg: Building Modern Lakehouse Data Pipelines
Introduction Traditional data warehouses were designed for structured data and fixed schemas. Modern businesses generate massive amounts of data from applications, IoT devices, APIs, logs, and transactions. To handle this scale, organizations are adopting the Lakehouse Architecture, which combines the flexibility of data lakes with the reliability of data warehouses.… Read More ⇢
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Databricks Watermark vs Window Explained with Simple Diagrams (Beginner’s Guide)
Learn the difference between Databricks Watermark and Window with simple diagrams, real-world examples, PySpark code, and interview questions. Perfect for beginners learning Structured Streaming. Read More ⇢
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Databricks RSA Preparation: Top Interview Questions and Answers (2026 Guide)
Meta Description: Prepare for Databricks RSA interviews with these frequently asked questions and detailed answers covering Delta Lake, Unity Catalog, Spark, SQL, Performance Tuning, Workflows, and more. Read More ⇢
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How to Create a Subagent in Claude Code: A Step-by-Step Guide
Learn how to create custom subagents in Claude Code — from YAML frontmatter setup to tool restrictions and model selection. Step-by-step guide with examples. Read More ⇢
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How to Migrate Hive Metastore to Unity Catalog in Databricks
Learn how to migrate from Hive Metastore to Unity Catalog in Databricks with this complete step-by-step guide covering architecture, security, governance, migration strategies, best practices, and real-world examples. Read More ⇢
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