The Backend Engineering Show with Hussein Nasser

Multitenancy refers to placing two or more clients, customers or tenants so they share a single resource. The idea behind Multitenancy is to save on resources instead of giving each client its own resource (storage, app, memory, network etc..). You slice each part and give it to dedicated client. The number one rule is those tenants shouldn’t be aware of the existence of other tenants, they need to be completed isolated, no one tenant can read or influence the other’s tenant share. If this is confusing don’t worry I’ll go through examples in this episode of the backend engineering show. 0:00 Intro 2:50 Ssd Multitenancy 6:45 Database Multitenancy 10:14 Networking Multitenancy (SDN) 16:55 VMs and Containers Multitenancy 19:00 Application Multitenancy

Scientists at the Physics and Engineering Department of the UK’s Lancaster University published a new paper describing ULTRARAM. A Low-Energy, High-Endurance, Compound-Semiconductor Memory on Silicon. I think this tech is a game changer but I still have my doubts. Let us discuss 0:00 Intro 0:30 RAM 4:00 SSD 11:00 UltraRAM 17:30 Doubts * RAM (Dynamic RAM) * Fast access with capacitors * random access * requires power to be refreshed * Flash NAND (SSD) * Pros fast random access (FTL) * Block storage * Requires high voltage (20V to erase/ 7.5 to program) * Low durability endurance which then (write amplification + garbage collection ) * UltraRAM uses a new novel approach to the memory cell design that only need 2.5 V to program/erase, low power which saves the memory cell lifetime https://www.sciencedirect.com/topics/engineering/fowler-nordheim-tunnelling * High endurance program/erase last longer * High retention * GC/WA not required * Limitations: still we know very little https://onlinelibrary.wiley.com/doi/10.1002/aelm.202101103

enom my DNS registrar had an outage which took down my site husseinnasser.com lets discuss   0:00 Intro  5:00 How DNS Works 12:00 Outage report 16:00 Will I migrate my DNS? 21:40 Does decentralize mean anything anymore?

In this episode of the backend engineering show, I’ll discuss the low code movements and their pros and cons. 0:00 Intro 2:00 Evolution of Languages 8:40 Low Code Movement 10:00 Side Effect of Low Code 13:00 Leaky Abstractions 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

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 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

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# 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 Support my work on PayPal https://bit.ly/33ENps4

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