The Backend Engineering Show with Hussein Nasser

In this video I want to talk over the active active active vs active passive cluster configuration for high availability. We will also explain the pros & cons of using an active-active cluster vs using an active-passive cluster.

A sidecar proxy is an application design pattern which abstracts certain networking features, such as inter-service communications, monitoring and security, timeouts, retries, communication protocols, away from the main architecture to ease the maintenance of the application as a whole. In this video I’d like to talk about how we classically do things: Library Pattern getComments HTTP1:1/JSON Add features retries/timeout /hardcode the server name what it changed/add new server to load balance between them/credentials Sidecar pattern getComments HTTP/2 Sidecar proxy/container Examples Microservices (Linkerd, Envoy, Istio) Pros Language agnostic (polyglot) Protocol upgrade Security Tracing and Monitoring Service Discovery Caching Cons Complexity Latency SideCar Proxy must be layer 7 Library 2:25 Sidecar: 7:40 Example: 13:00 (https://www.youtube.com/watch?v=cp3Ku1XeOn8) Pros & Cons : 16:15 Cards 6:22 HTTP/2 10;50 Reverse Proxy / proxy example 13:00 (https://www.youtube.com/watch?v=cp3Ku1XeOn8) 16:00 Layer 4 vs Layer 7 load balancer

MySQL 8.0 supports atomic Data Definition Language (DDL) statements. This feature is referred to as atomic DDL. An atomic DDL statement combines the data dictionary updates, storage engine operations, and binary log writes associated with a DDL operation into a single, atomic transaction. The transaction is either committed, with applicable changes persisted to the data dictionary, storage engine, and binary log, or is rolled back, even if the server halts during the operation. I discuss mySQL 8.0 atomic ddl compared to Postgres transactional ddl

gRPC (gRPC Remote Procedure Calls[1]) is an open source remote procedure call (RPC) system initially developed at Google in 2015[2]. It uses HTTP/2 for transport, Protocol Buffers as the message format. In this video I want to explore gRPC, go through examples, pros and cons of gRPC. Client/ Server communication SOAP HTTP (REST) WebSockets Client Libraries gRPC gRPC Demo todos gRPC Pros and Cons Pros Fast two/uni and request Unform One library to rule them all Progress feedback( long synchronous requests) drop pluggable wait...) cancel request All benefits of H2 and Protobuff Cons schema based (not everyone wants schema) Thick client - limited languages - Proxies still don’t understand it Still young Error handling No native browser support Timeouts, circuit breaker just like any RPC (pub/sub rules in this case) Can you create your own protocol? Spotify example with Hermes

Firefox version 73.1 fixes a bug that prevented users from signing into Royal Canadian Bank  (Firefox fixed a bug that prevented Canadians from signing in to their bank royal Canadian bank) what caused it? Lets get into it   * Users will sign in and will get blank page.  * Cause Beacon API and HTTP/2  * Bug has been there forever    Sources https://bugzilla.mozilla.org/show_bug.cgi?id=1613943#c16 🏭 Software Architecture Videos

Some cool new features are coming to the Javascript language namely Optional chaining and nullish coalescing how useful are they? lets discuss So Optional chaining and nullish coalescing are coming to the Javascript language. I think it is already in the Javascript Engines (V8, SpiderMonkey, JavascriptCore and Chakra) which will be picked up by other clients such as browsers, node js , dino other stuff .. Cool stuff lets get into it. Show them (chrome devtools) Where is it available? Node JS not yet (13.9 V7.9) (https://github.com/nodejs/node/blob/master/doc/changelogs/CHANGELOG_V13.md#13.9.0) Resources V8 release v8.0 · V8 Optional Chaining https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Optional_chaining Nullish coalescing https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Nullish_coalescing_operator

We are one step closer to a more secure web. Firefox disabled TLS 1.0 1.1 It’s a big change that I am very happy about but not everyone is. Let's discuss . Resources https://hacks.mozilla.org/2020/02/its-the-boot-for-tls-1-0-and-tls-1-1/ https://www.openssl.org/~bodo/ssl-poodle.pdf Firefox disabled TLS 1.0 1.1 It’s a big change that I am very happy about but not everyone is. Lets discuss Resources https://hacks.mozilla.org/2020/02/its-the-boot-for-tls-1-0-and-tls-1-1/ https://www.openssl.org/~bodo/ssl-poodle.pdf

Google engineer Alyssa Wilk discovers a critical security bug related to whitespaces in header values. Envoy and Node JS fix this by releasing a security patch. let us discuss it. tags: envoy, envoy proxy, envoy security, envoy proxy whitespace, Alyssa Wilk

Node JS Releases a Fix for an HTTP Request Smuggling Vulnerability, we discuss the attack and the fix in detail.

In April 2019 Google blocked sign-ins from Embedded Browsers to avoid man in the middle phishing attacks. In this video, we discuss why.    https://security.googleblog.com/2019/04/better-protection-against-man-in-middle.html?m=1