Adham Ehab

📍 Cairo, Egypt http://adhamehab.com

Notes on Database ( Part 2 ) - Transactions, Concurrency and Isolation Levels

Introduction In the previous post, we discussed how to study databases and the resources to use. In this post, we will dive into the core of databases: Transactions. The reason I'm starting with transactions because they are (in my opinion) the most important concept in databases. When you

Notes on Database ( Part 1 ) - How to study databases

My Desktop Setup Introduction Since I was a computer science student, the study of databases has always been the most interesting topic for me. When you study how databases work, you will touch every aspect of computer science, from algorithms, data structures, operating systems, networking, and distributed systems to concurrency.

Understanding Metrics Percentiles

Introduction When working with production systems, we usually track metrics like latency and throughput to understand system performance. But, sometime (and I mean most of the time), those metrics can give a false sense of good performance. Well, not the metrics themselves but how we reason about them and how

You are Writing Python the Wrong Way

Or I have a high ego and I think you should listen to me. Introduction For years, I've seen Python code that makes me cringe. It's not because the code is inherently bad, but because it misses the essence of what Python is meant to be.

On Managing Your Manager, Effectively

For the past decade, I've worked under various managers—both technical and non-technical. One key lesson I've learned is that managing your manager is as crucial as managing your tasks. It's about empathy, understanding their perspective, and creating a good working relationship. In the

Testing strategies for Data Systems with testcontainers

Introduction After spending years building and maintaining data systems at scale, I feel like I've finally found the missing piece in testing data systems. While unit tests are great and provide a baseline of confidence, I never truly believed that they provide real confidence in the codebase. Over

Getting more productive without getting tired.

Context For the past 10 years and and even since I was a high school student, I wondered how can I get more things done in less time without draining my energy. Throughout, the years, I noticed that what I was lacking is a systematic workflow that help me increase

Deep learning for Arabic part-of-speech tagging

A blog post about training arabic part of speech tagger.