The Backend Engineering Show with Hussein Nasser

It seems like these incidents are very common and not sure why ElasticSearch in particular. Let us discuss      https://www.zdnet.com/article/leaky-server-exposes-users-of-dating-site-network/

Some of you asked me how to deal with stress at my work and my content creation here on YouTube I share my thoughts with you Intro 0:00 Stress from Work 2:40 Feeling down with no clear reason 7:13 Feeling anxious overwhelmed with stuff to learn 14:55 Pandemic 21:14

Unimog is a layer 4 load balancer built for Cloudflare scale. Cloudflare has written a great blog about it so let us discuss this technology. Video: https://youtu.be/Q0irm6xzNNk Resources https://blog.cloudflare.com/unimog-cloudflares-edge-load-balancer/ 0:00 Intro 3:33 Layer 4 vs Layer 7 Load Balancers 7:00 Anycast 13:45 Packet Forwarding 23:30 XDP and Network stack 26:45 Maintaining established connection 31:00 Edge Computing 32:00 UDP Routing 33:00 Unimog Summary 34:00 Open Source Software 36:00 K8 Rant 40:00 Conclusion Cards 6:30 L4 vs L7 proxying https://www.youtube.com/watch?v=aKMLgFVxZYk 12:30 vip https://www.youtube.com/watch?v=85XY7H2JPbs 13:30 tcp handshake https://www.youtube.com/watch?v=bW_BILl7n0Y&t=5s

Jake Miller a security researcher discovered a serious flaw in proxies that allow h2c clear text upgrade and bypass proxy rules. Let us discuss Thanks to @Textras for sending this article! https://twitter.com/thebumblesec/status/1303305853525725184?s=21 https://labs.bishopfox.com/tech-blog/h2c-smuggling-request-smuggling-via-http/2-cleartext-h2c?hs_amp=true

Apache Kafka is an interesting software, every design decision the team makes perfect sense. I decided to dive deep into the discussion of the consumer group concept which is underrated and talk more about it. 0:00 Intro 1:24 Messaging Systems Explained 3:30 Partitioning 4:30 Pub/Sub vs Queue 6:55 Consumer Group 10:00 Parallelism in Consumer Group 10:30 Partition awareness in Consumer Group 11:30 Achieving Pub/Sub with Consumer Group 14:00 Head of Line blocking in Kafka

Someone asked me a question and I felt its interesting to make a video about, is there a limit to the maximum number of TCP connections a Client can make to the server? If there is what is it? and how does that make sense in all the configurations? 0:00 Intro 1:00 Is there a Max Connection Limit? 4:30 64K Connection Limit Explained 7:20 Max Connections on Reverse Proxies and Max Connections 14:30 How does Router get around Max Connections? 7:00 3 million whatsapp https://www.youtube.com/watch?v=vQ5o4wPvUXg 10:25 envoy https://www.youtube.com/watch?v=40gKzHQWgP0& 12:50 google https://www.youtube.com/watch?v=CUiBVTcgvBU 14:00 Active Active https://www.youtube.com/watch?v=d-Bfi5qywFo

Doordash the food delivery service has built an asynchronous task processing backend with Celery and RabbitMQ. They are having lots of outages and problems. Let us discuss how they solved their problem by moving to Apache Kafka. Very well written article. Resource https://doordash.engineering/2020/09/03/eliminating-task-processing-outages-with-kafka/ https://www.rabbitmq.com/connections.html#high-connection-churn  

Application-Layer Protocol Negotiation (ALPN) is a Transport Layer Security (TLS) extension that allows the application layer to negotiate which protocol should be performed over a secure connection in a manner that avoids additional round trips and which is independent of the application-layer protocols. It is needed by secure HTTP/2 connections, which improves the compression of web pages and reduces their latency compared to HTTP/1.x. The ALPN and HTTP/2 standards emerged from development work done by Google on the now withdrawn SPDY protocol. https://en.wikipedia.org/wiki/Application-Layer_Protocol_Negotiation 1:30 TCP Handshake 1:40 TLS

In this video I explain when to use TCP vs UDP as a communication protocol on your backend app. I go through the advantages and disadvantages of UDP I also discuss the protocol within the context of Chatting System, Multiplayer game, and building a browser and a web server   0:00 Intro 2:00 UDP 3:00 TCP 6:00 UDP vs TCP for Building a Chatting System  9:20 UDP vs TCP for Building a Multiplayer game  15:30 UDP vs TCP for Building a Browser and WebServer 19:11 Summary

HTTP/2 is a protocol that allows multiplexing which can be very beneficial however HTTP/2 is not always cheap and might not be a good choice for your backend. * Intro 0:00 * What is HTTP/2 ? 1:30 * HTTP/2 Pros 5:10 * HTTP/2 Advantages on Browsers 5:30 * HTTP/2 Advantages on Reverse Proxy Connection Pooling 9:20 * HTTP/2 Problem 11:00 Google Talk https://www.youtube.com/watch?v=xxN4FfwaANk