https://www.fullstackalchemy.com/blog FullStackAlchemy is the digital studio and blog of Javid Lone – a full stack developer and UI engineer specializing in TypeScript, React, and UX-centric web development. Showcasing modern web apps, portfolio projects, and technical deep dives. en-us hi@javidlone.com (Javid Lone) hi@javidlone.com (Javid Lone) Tue, 08 Sep 2026 00:00:00 GMT https://www.fullstackalchemy.com/blog/data-systems-engineering-part-2-spark-execution-model https://www.fullstackalchemy.com/blog/data-systems-engineering-part-2-spark-execution-model A local PySpark experiment that reproduces a trusted ecommerce revenue query and makes DataFrames, laziness, jobs, stages, tasks, exchanges, and physical plans observable. Tue, 08 Sep 2026 00:00:00 GMT hi@javidlone.com (Javid Lone) data-engineeringsparkpysparkdistributed-systemsdata-platform https://www.fullstackalchemy.com/blog/data-systems-engineering-part-3-parquet-physical-layout https://www.fullstackalchemy.com/blog/data-systems-engineering-part-3-parquet-physical-layout A concrete Spark experiment comparing unpartitioned and order-date-partitioned Parquet layouts, with physical files, directory pruning, pushed filters, task counts, and small-files economics. Tue, 08 Sep 2026 00:00:00 GMT hi@javidlone.com (Javid Lone) data-engineeringsparkpysparkparquetdata-platform https://www.fullstackalchemy.com/blog/data-systems-engineering-part-4-spark-joins-and-shuffle https://www.fullstackalchemy.com/blog/data-systems-engineering-part-4-spark-joins-and-shuffle A verified PySpark join experiment showing why join cardinality matters, when Spark broadcasts a small dimension, and how disabling broadcast exposes hash partitioning, exchanges, sorting, and shuffle. Tue, 08 Sep 2026 00:00:00 GMT hi@javidlone.com (Javid Lone) data-engineeringsparkpysparkdistributed-systemsdata-quality