Vignesh Gopalan @vignemp5

Where CDNs are heading (and why it changes how you architect things): Traditional CDN → cache files at the edge Modern CDN → run actual code at the edge Cloudflare Workers, Lambda@Edge, Fastly Compute, Vercel Edge Functions. These let you run logic at the CDN layer: - Auth validation — token expired? Return 401 at the edge. Backend never knows someone tried. - A/B testing — route 5% of traffic to a variant by modifying the response at the edge. Zero backend changes. - Geo-personalisation — different pricing, language, content based on location. All at the edge. - Response transforms — Client A wants 5 fields, Client B wants 12. Transform the same cached response differently per client. This blurs the line between "CDN" and "distributed app server." Your origin handles writes and heavy computation. The edge handles everything else. How I think about CDN when designing a system: 1. What's the read-to-write ratio? If it's anywhere near 100:1 (most systems), the CDN is your most important layer. Full stop. 2. Classify content by change frequency: - Never changes → long TTL - Changes hourly → short TTL + stale-while-revalidate - Changes per-request → don't cache (or cache per-cohort) 3. Measure cache hit ratio every week. Below 85%? You're leaving free performance on the table. 4. Move read-heavy, latency-sensitive logic to the edge. Auth checks. Geo-routing. Response transforms. A CDN is not something you bolt on when the site gets slow. It's an architecture decision you make on day one.

You’re framing this at the wrong abstraction layer. The discussion was never about what a vanilla load balancer does by default. A basic balancer can route on primitives: round-robin, connection count, latency, health checks, weights, L4/L7 rules. Those are useful routing inputs, but they are not the same thing as load awareness. Load awareness means the routing path has feedback from what the workload is actually experiencing: saturation, queue depth, in-flight work, error rates, outliers, resource pressure, and backpressure. That is why my original post pointed to service mesh plus resource metrics. Once downstream state matters, this stops being an algorithm-selection discussion and becomes a control-loop discussion. The architectural question is not “does a basic balancer do this out of the box?” The architectural question is where workload feedback enters the routing path, how it is measured, and which layer owns the decision to shed, steer, retry, eject, or slow traffic before the system collapses.

@Knaachiyar5 @Knaachiyar5 That picture was taken probably during a photo shoot of a movie where they were wearing prison costumes. The other person was the legendary Balasaraswathi amma who was also given sangeetha kalanidhi award!

@kamath_pramod Sir, did you get any resolution from NTA about the issue? son faced a similar issue in jan 2026 where it showed he has attended very less question and the choices he gave are not choices the answer sheet showed. We have written to NTA about this.

Dear All One of my office colleague's 7 month old daughter Siya, has been diagnosed with Spinal Muscular Atrophy - Type 1 and she needs your support Her only hope is a gene drug called Zolgensma which costs ₹ 9 cr Can you guys help her out? impactguru.com/fundraiser/hel…

@madraswallah @veejaysai @shreeraam_22 There is also a channel by Raju Asokan featuring many private recordings.

@ShriramKMurthi Take care professor!

@tagir_valeev Performance tip: don't let performance tips skew your development! Write clear, correct code. Its probably already fast enough. If it's not, start measuring before randomly applying performance tips. Then measure after applying the tip, and if it doesn't help, roll back.

@ArtSivasri How many classes will be conducted? Is the duration 1 hour?

The single most undervalued fact of linear algebra: matrices are graphs, and graphs are matrices. Encoding matrices as graphs is a cheat code, making complex behavior simple to study. Let me show you how!

I'm a Head of Finance at Google. I've interviewed 100s of candidates in my career and I know my decision within the first 7 minutes. Do these 5 things to prepare for the interview and I guarantee you'll impress recruiters and hiring managers at your dream company:

My book #LearnLispTheHardWay is back online (and now powered by GitBook on GitLab Pages) #Lisp #CommonLisp #LearnLisp llthw.common-lisp.dev

Java Flight Recording Custom Exception Settings altuga.medium.com/java-flight-re… #java #exceptions #jfr

cs.uwaterloo.ca/~plragde/flane… functional DS book

This is how we hear sounds🤩

Do you remember when you joined Twitter? I do! #MyTwitterAnniversary

So how did you learn the art of low latency programming? I would love to hear what patterns you follow or what blog posts or publications you recommend! (You can find my compilation of low latency programming patterns and resources here: github.com/penberg/awesom…) 5/5

#Serverless Craic is back with a brand new episode on how to: 'Become an awesome software architect with these 12 books'. The team give you the inside track on the books that inspired them and their new book 'The Flywheel Effect'. youtube.com/watch?v=njfQer…

You can probably optimize your @java programs to run 2-10x faster, by focusing on the bottlenecks. Those bottlenecks are not where you think they are. Use free tools such as async-profiler, VisualVM, JFR and vmstat to find them. Let me show you how. 🧵

A non-standard book list for software developers mihaiolteanu.me/books.html