Yousry Mohamed – Medium

Yousry Mohamed
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Level Up Coding

Delta Lake Liquid Clustering — A visual explanation

How to optimize lakehouse data storage layout with minimal effort.

10 min readJan 28, 2024

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Delta Lake Liquid Clustering — A visual explanation

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Yousry Mohamed
in
Level Up Coding

Building a lakehouse on Google Cloud sans Databricks

Combining Delta Lake, Iceberg and BigLake

16 min readDec 17, 2023

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Building a lakehouse on Google Cloud sans Databricks

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Yousry Mohamed
in
Level Up Coding

Navigating the Void: Unraveling the Mysteries and Pitfalls of the ‘Void’ Data Type in Apache Spark

Exploring how a void column appears into Spark DataFrames and what could be the implications.

8 min readDec 5, 2023

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Navigating the Void: Unraveling the Mysteries and Pitfalls of the ‘Void’ Data Type in Apache Spark

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Yousry Mohamed
in
Level Up Coding

Setting up a PySpark local developmet environment for Dataproc serverless

Smooth dependency managment for local developmet and production jobs

11 min readAug 29, 2023

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Setting up a PySpark local developmet environment for Dataproc serverless

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Yousry Mohamed
in
Level Up Coding

dbt tests vs Delta Live Tables expectations : a click bait to Spark observable metrics

Comparing dbt and DLT tests performance and corelating to Spark observable metrics

7 min readAug 5, 2023

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dbt tests vs Delta Live Tables expectations : a click bait to Spark observable metrics

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Yousry Mohamed
in
Level Up Coding

Delta Lake Universal Format — A First Look

Write as delta lake — Read as iceberg

8 min readJul 15, 2023

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Delta Lake Universal Format — A First Look

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Yousry Mohamed
in
Level Up Coding

Back to basics : Spark caching key ideas!

Foundational concepts about how Spark caches Dataframes vs RDDs

6 min readMar 13, 2023

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Back to basics : Spark caching key ideas!

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Yousry Mohamed

Delta lake Z-Ordering from A to Z

Understand how to optimise delta lake tables for high cardinality queries.

15 min readSep 19, 2022

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Delta lake Z-Ordering from A to Z

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Yousry Mohamed
in
Towards Data Science

Idempotent writes to delta lake tables

A walkthrough using open source delta lake

10 min readJul 8, 2022

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Idempotent writes to delta lake tables

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Yousry Mohamed
in
Analytics Vidhya

Spark Session and the singleton misconception!

What structured streaming reveals about Spark Session

7 min readMar 30, 2022

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Spark Session and the singleton misconception!

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Yousry Mohamed

Yousry Mohamed

Yousry is a lead consultant working for Cuusoo. He is very passionate about all things data including Big Data, Machine Learning and AI.

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