The Backend Engineering Show with Hussein Nasser

These are some fundamental technologies that I want to explore in 2022.   0:00 The Way I learn 4:20 Database Engineering 7:00 Network Engineering  9:30 Hardware and Operating Systems 15:00 The problem with software engineering   Collateral Knowledge Video https://www.youtube.com/watch?v=6YKbVpWmeLM&t=3s  Become a Member on YouTube https://www.youtube.com/channel/UC_ML5xP23TOWKUcc-oAE_Eg/join 🔥 Members Only Content https://www.youtube.com/playlist?list=UUMO_ML5xP23TOWKUcc-oAE_Eg  Fundamentals of Database Engineering udemy course (link redirects to udemy with coupon) https://database.husseinnasser.com Introduction to NGINX  (link redirects to udemy with coupon) https://nginx.husseinnasser.com Python on the Backend (link redirects to udemy with coupon) https://nginx.husseinnasser.com

Welcome to another dev tools video, in this video I use dev tools to break down how Tiktok website works to pull short-form content. 

We will use therock as a subject. It is an interesting episode, enjoy   

In this episode of the backend engineering show, I explain the journey of an HTTP request that gets initiated from a click on a link. I discuss DNS, TCP, API Gateways, reverse proxies, load balancers, backend web servers, and much more.

Become a Member on YouTube

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🔥 Members Only Content

https://www.youtube.com/playlist?list=UUMO_ML5xP23TOWKUcc-oAE_Eg

🧑‍🏫 Courses I Teach

https://husseinnasser.com/courses

In this episode of the backend engineering show, I explain the journey of an HTTP request that gets initiated from a click on a link. I discuss DNS, TCP, API Gateways, reverse proxies, load balancers, backend web servers, and much more.

Become a Member on YouTube

https://www.youtube.com/channel/UC_ML5xP23TOWKUcc-oAE_Eg/join

🔥 Members Only Content

https://www.youtube.com/playlist?list=UUMO_ML5xP23TOWKUcc-oAE_Eg

🧑‍🏫 Courses I Teach

https://husseinnasser.com/courses

Right after the latest patch log 4j 2.16, a new denial of service vulnerability surfaced on log4j resulting in a new 2.17 patch. Let us discuss.

0:00 log4dos

4:50 History of log4j fixes

15:20 All love to the open source maintainers

Previous Backend Engineering show episode coverage of log4shell

https://youtu.be/77XnEaWNups

https://logging.apache.org/log4j/2.x/security.html#

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https://www.youtube.com/channel/UC_ML5xP23TOWKUcc-oAE_Eg/join

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Support my work on PayPal

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In this episode of the backend engineering show, we go through a deep dive to uncover the reason behind the outage on December 7th, 2021 Amazon outage.

RCA

https://aws.amazon.com/message/12721

All outage analysis videos

https://www.youtube.com/watch?v=dhZ5--R42AM&list=PLQnljOFTspQXdkZLiYCCh_5RBP1-T-Rnx

Get the Fundamentals of Database Engineering udemy course

https://database.husseinnasser.com 

In this episode of the backend engineering show, we go through a deep dive to uncover the reason behind the outage on December 7th, 2021 Amazon outage.

RCA

https://aws.amazon.com/message/12721

All outage analysis videos

https://www.youtube.com/watch?v=dhZ5--R42AM&list=PLQnljOFTspQXdkZLiYCCh_5RBP1-T-Rnx

Get the Fundamentals of Database Engineering udemy course

https://database.husseinnasser.com

Become a Member on YouTube

https://www.youtube.com/channel/UC_ML5xP23TOWKUcc-oAE_Eg/join

In this episode of the backend engineering show, I discuss the log4j vulnerability (CVE-2021-44228 also known as log4shell) that took the Internet by storm.

0:00 Intro

1:00 log4j

5:30 How the attack started

11:00 Attack with DNS

17:00 Remote Code Execution

23:00 Remedy

31:00 Scanning

References

https://nvd.nist.gov/vuln/detail/CVE-2021-44228

https://youtu.be/oC2PZB5D3Ys

🧑‍🏫 Courses I Teach

https://husseinnasser.com/courses

Become a Member on YouTube

https://www.youtube.com/channel/UC_ML5xP23TOWKUcc-oAE_Eg/join

🔥 Members Only Content

https://www.youtube.com/playlist?list=UUMO_ML5xP23TOWKUcc-oAE_Eg

In this episode of the backend engineering show taken from my udemy Q&A I discuss the reasons behind Postgres HOT Optimization or heap only tuple. 

Postgresql database implements MVCC by creating a new row version for any update/delete/or insert. While this is a sound implementation to support concurrent transactions reading old version of the rows, it does have some side effects and this is what I want to discuss in this episode of the backend engineering show.

0:00 Intro

1:00 Postgres MVCC design

6:42 MVCC on other databases

11:15 Side-effects of Row-versioning

17:00 Postgres HOT optimization

19:50 How Index bloat affects Performance

24:20 How Postgres 14 Addresses index bloat

Cards:

14:12 b-tree https://www.youtube.com/watch?v=a1Z40OC553Y

Resources

https://www.postgresql.org/docs/14/btree-implementation.html#BTREE-DELETION