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PHP2Shell: The PHP Bug
Akshay Thakare

Databricks

Lakehouse, Delta Lake, Unity Catalog and workflows.

4 notes · all topicsWarehousing & lakehouse

Start here · beginner1

  1. 1Medallion Architecture: Bronze, Silver, GoldWhat belongs in each layer, which rules apply where, and how the medallion pattern maps to raw, curated and published zones.

Next · intermediate2

  1. 2Delta Lake: ACID Tables on a Data LakeHow the transaction log turns Parquet files into tables with atomic writes, time travel, MERGE and schema enforcement.
  2. 3Upserts with Delta Lake MERGEWrite idempotent upserts with MERGE INTO, handle duplicate source keys, apply deletes from CDC and avoid rewriting the whole table.

Go deeper · advanced1

  1. 4OPTIMIZE, Z-ORDER, Liquid Clustering and VACUUMTable maintenance for Delta Lake: compacting small files, co-locating data for faster filters, and removing old files safely.