How Discord Stores TRILLIONS of Messages
Discord migrated a trillion‑plus message store from Cassandra (177 nodes) to ScyllaDB (72 nodes) in nine days with zero downtime. The success hinged on a Rust‑based data‑service layer for request coa…
Posts by Categories
- system-design 19
- machine-learning-concept 11
- python 4
- web 3
- AI 1
- machine-learning-project 1
- EDA 1
- SQL 1
- interview 1
- patent 1
system-design
Top 5 Most-Used Deployment Strategies
Deployment strategies trade off risk, downtime, and resource cost. The five most‑used approaches—Big Bang, Rolling, Blue‑Green, Canary, and Feature Toggles—each fit different release constraints and…
Top 7 Most-Used Distributed System Patterns
Distributed system patterns such as Ambassador, Circuit Breaker, CQRS, Event Sourcing, Leader Election, Pub/Sub, and Sharding provide reusable solutions for latency, resilience, scalability, and main…
10 Key Data Structures We Use Every Day
Data structures are the building blocks of everyday software, each offering distinct performance characteristics and cache‑friendliness. Choosing the right one—lists, arrays, stacks, queues, heaps, t…
Cache Systems Every Developer Should Know
Caching permeates every layer of a modern system—from CPU registers to browsers, CDNs, load balancers, message brokers, distributed stores, and databases. By keeping frequently accessed data close to…
Everything You Need to Know About DNS: Crash Course System Design #4
DNS is a hierarchical, decentralized directory system that translates human-readable domain names into machine-readable IP addresses through a three-tier chain of authoritative servers (root → TLD →…
But What Is Cloud Native Really All About?
Cloud Native is not simply “running your app on the cloud”; it is a blueprint for building web-scale applications that are more available, scalable, and agile, built on four pillars: microservices ar…
Debugging Like A Pro
Debugging is a disciplined, mindset‑driven process that starts with thorough information gathering and a reproducible environment, then proceeds through systematic investigation (print statements, de…
Top 5 Redis Use Cases
Redis’s in‑memory data structures make it ideal for high‑speed caching, session storage, distributed locks, rate limiting, and gaming leaderboards. Deploying Redis as a distributed cache or lock requ…
| CI/CD In 5 Minutes | Is It Worth The Hassle: Crash Course System Design #2 |
CI/CD automates building, testing, and deploying code so teams can ship higher‑quality software faster. CI is widely adopted and relatively straightforward, while true continuous deployment (CD) is p…
| Kubernetes Explained in 6 Minutes | k8s Architecture |
Kubernetes (k8s) is an open‑source container orchestration platform that automates deployment, scaling, and management of containerized workloads via a control plane (API server, etcd, scheduler, con…
CAP Theorem Simplified
CAP states that in the presence of a network partition a distributed system must sacrifice either Consistency or Availability. Real‑world systems often adopt hybrid or “best‑effort” strategie…
What is RPC? gRPC Introduction.
gRPC is Google’s open‑source RPC framework that couples strongly‑typed Protocol Buffers with HTTP/2 to deliver high‑performance, language‑agnostic inter‑service communication. It excels for microserv…
What Is GraphQL? REST vs. GraphQL
GraphQL is a schema‑driven query language that lets clients request exactly the data they need, potentially aggregating multiple backend resources in a single request. It trades the simplicity and ca…
Proxy vs Reverse Proxy (Real-world Examples)
A forward proxy mediates client‑to‑Internet traffic, while a reverse proxy mediates Internet‑to‑server traffic. Reverse proxies add security, load‑balancing, caching, and SSL termination, oft…
Latency Numbers Programmer Should Know: Crash Course System Design #1
This video walks through a curated list of common latency numbers grouped by order of magnitude—from sub-nanosecond CPU register access up to multi-second network transfers—emphasizing that understan…
What Is REST API? Examples And How To Use It: Crash Course System Design #3
REST (REpresentational State Transfer) is a set of architectural conventions—not a formal specification—that has dominated web API design since the early 2000s. It organizes resources behind unique U…
Big Misconceptions about Bare Metal, Virtual Machines, and Containers
Bare metal offers maximum performance and isolation but is costly and hard to scale; virtual machines provide flexible sizing and better utilization with moderate isolation; containers give the highe…
System Design: Why is Kafka fast?
Kafka’s speed comes from two core design choices: using an append‑only log to guarantee sequential disk I/O, and leveraging the zero‑copy system‑call path (e.g., sendfile()) to move data fr…
machine-learning-concept
How an LLM Works: Tokens, Attention, Context, Evaluation, and Serving
How an LLM represents text → how a Transformer computes → how generation works → how we control context → how we evaluate → how we adapt the model → how we optimize and serve it.
Deep Learning Applications in Computer Vision
Deep Learning / Computer Vision /
Deep Learning Performance Improvement 4 - Back-propagation
Back-propagation / Forward-propagation / Machine Learning Performance Improvement
Deep Learning Performance Improvement 3 - Regularization
Penalizing Regularization (L1 and L2) / Dropout / Machine Learning Performance Improvement
Deep Learning Performance Improvement 2 - Optimizer
Optimizer / Gradient Descent / Stochastic Gradient Descent / Momentum / Adam / Machine Learning Performance Improvement
Deep Learning Performance Improvement 1 - Parameter Initialization
Parameter Initialization / Weight Initialization / Machine Learning Performance Improvement
Regression3 (Regression Applications)
Regression analysis3
Regression2 (Overfitting and Regularization)
Regression analysis2
Regression1
Regression analysis1
Machine Learning Basic_1
ML Pipeline / Key Terminology / Applications
Machine Learning.
example of mathmatics expressions.
python
Print the table (Math Set-2)
math_set2 / Cracking the Coding Interview
Print the pattern (Math Set-1)
math_set1 / Cracking the Coding Interview
Calculating the Balance in Your Retirement Account (GUI)
Wealth calculation at retirement / GUI
Regular Expression Tutorial
Regular Expression Tutorial
web
Data Crawling with Scrapy
Scrapy / Web / Data Crawling
Data Crawling with Twitter API
API / Web / Data Crawling / Twitter / Sentiment Analysis / NLP
Into. to APIs and Web
API / Web / HTTP / Client / Server / TCP / DNS
AI
Pathfinding in Pacman domain
AI / Pathfinding / Search Algorithms / Applications
machine-learning-project
Demystifying Regularization
L1 L2 Regularization / Comparison between Ridge and Lasso Regression / bias-variance tradeoff
EDA
Data Matching (Recordlinkage and Fuzzymatcher)
Record Liking and Fuzzy Matching
SQL
Database System and SQL
SQL / Personal Relational Database Query Project
interview
Interview Preparation1
Interview / Algorithms
patent
Scan & Go Patent
Patent / Publication