---
title: "Nandan Kumar (@sirius93) | Hashnode"
description: "Software Engineer • Mentor • Tech Speaker. Read the latest articles by Nandan Kumar on Hashnode."
url: "https://hashnode.com/@sirius93"
---

@sirius93

# Nandan Kumar

@sirius93 · Bangalore, India · Joined May 2022

Software Engineer • Mentor • Tech Speaker

[Website](https://nandan.dev/)

## Comments

[Thank you for your kind words.](https://hashnode.com/posts/what-i-built-in-the-last-year-a-list-of-failures/6ac302b7e27a522dc07fbe16/comment/6ac36bd88247e4b88209a243#reply-6aeae391380c4a89bc1cdf9a)

Reply · Article · Nov 4 · [What I Built in the Last Year: A List of Failures](https://hashnode.com/posts/what-i-built-in-the-last-year-a-list-of-failures/6ac302b7e27a522dc07fbe16)

[Thank you for your kind words :)](https://hashnode.com/posts/what-i-built-in-the-last-year-a-list-of-failures/6ac302b7e27a522dc07fbe16/comment/6ac39132dbcf32694765e059#reply-6aeae382a8b7e3b87d50af72)

Reply · Article · Nov 4 · [What I Built in the Last Year: A List of Failures](https://hashnode.com/posts/what-i-built-in-the-last-year-a-list-of-failures/6ac302b7e27a522dc07fbe16)

[Thanks, Vinod Sir for your kind comment. To answer your question: SQL databases typically scale vertically, which means that to handle an increased load, you add more resources (like CPU, RAM, or storage) to a single server. This approach is often referred to as "scaling up." While it can improve performance, it has its limits and can become costly as you need more powerful hardware. On the other hand, NoSQL databases are designed to scale horizontally. This means that instead of adding more resources to a single server, you add more servers to handle the increased load. This approach is known as "scaling out." It allows for better distribution of data and can handle larger amounts of traffic by spreading the load across multiple servers. In summary, vertical scaling (SQL) involves enhancing the capacity of a single machine, while horizontal scaling (NoSQL) involves adding more machines to distribute the load. I hope this clarifies the difference! If you have any more questions, feel free to ask.](https://hashnode.com/posts/system-design-sql-vs-nosql-databases/66bb9153deef71ff683a6d3d/comment/6714f285f2c8c8c962f6326e#reply-67176fb1e7b9f32e853b9b06)

Reply · Article · Oct 22, 2024 · [System Design : SQL vs NoSQL databases](https://hashnode.com/posts/system-design-sql-vs-nosql-databases/66bb9153deef71ff683a6d3d)

[indeed. One should always be careful. Airlines now a days collect too much data and that makes it more important to implement a stronger data security rule.](https://hashnode.com/posts/how-i-hacked-an-airline-website-to-get-back-my-luggage-a-first-person-insight-to-the-story/6303d80609d19537666ea9a6/comment/6304a4758f733542b121197e#reply-6304c58f8f733542b12121e4)

Reply · Article · Aug 23, 2022 · [How I "Hacked" an Airline Website to get back my luggage: A first-person insight to the story.](https://hashnode.com/posts/how-i-hacked-an-airline-website-to-get-back-my-luggage-a-first-person-insight-to-the-story/6303d80609d19537666ea9a6)

[Eleftheria Batsou Does it have to be about tech as in how I became a software engineer etc? Or it can be about tech In general. Like I want to write about my own experiences and how I used tech in it.Does that work?](https://hashnode.com/posts/4-articles-in-4-weeks-hashnode-writeathon/62fa70dbfffdab933bded19c/comment/6302527d8aba0d29c14d4e23)

Comment · Article · Aug 21, 2022 · [4 Articles in 4 Weeks - Hashnode Writeathon](https://hashnode.com/posts/4-articles-in-4-weeks-hashnode-writeathon/62fa70dbfffdab933bded19c)

[Awesome 😁](https://hashnode.com/posts/how-to-make-a-kickass-bio-for-your-github-profile-using-dailydevs-devcard-and-metrics/62def3c2790e138f3d397548/comment/62dfb85b8730728f62e8dd47#reply-62dfb8b9790e138f3d398e84)

Reply · Article · Jul 26, 2022 · [How to make a kickass bio for your GitHub profile using DailyDev's Devcard and metrics.](https://hashnode.com/posts/how-to-make-a-kickass-bio-for-your-github-profile-using-dailydevs-devcard-and-metrics/62def3c2790e138f3d397548)