Postgres Internals I
This document discusses a few high-level concepts of PostgreSQL’s internals. Even though these are not needed in day-to-day activities, knowing them would certainl...
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Log-Structured Merge (LSM) tree
The Log-Structured Merge Tree, also known as an LSM tree, is one of the most popular storage engines, focusing on performant write operations. The benefit over the B+ ...
Byzantine Consensus
The Byzantine consensus problem is an interesting problem in distributed systems, even though it dates back to medieval times. The idea originates in medieval battle s...
PostgreSQL - Isolation Levels
The transaction isolation level is one of the vital aspects to understand how transactions influence each other when run concurrently. Isolation level establishes a ba...
Fundamentals of System Design - Failure Models
Distributed systems consist of a set of loosely coupled services that end users perceive as a single coherent system. However, due to the loose coupling between compon...
Fundamentals of System Design - Concurrency and Parallelism
Concurrency and Paralleism - these terms sound similar; however, from a software engineer’s perspective, they denote two different concepts. Concurrency is the abilit...
System Design - Notification System
In this wiki, we will explore an approach to designing a notification service. Requirements What type of notifications do we need to send? => Push, SMS, email ...
System Design - Web Crawler
In this wiki, we will explore an approach to designing a Web-crawling service. Requirements What is the purpose of the crawler here? Search engine indexing, data m...
System Design - Design a URL Shortener
In this wiki, we will explore an approach to design a URL shortener service. Requirements: Shortened URLs’ length should be as short as possible Shortened URL sh...
System Design - Design a Unique ID Generator for Distributed Systems
In this wiki, we will explore how various services generate unique IDs. Requirements: Characteristics of the unique ID required IDs must be unique and s...
