Collins Kariuki

Electrical engineer explains why keeping your laptop plugged in is actually better for the battery than constantly charging it. But I always thought it was the other way around.🤔

we all know that AWS went down for some time. let’s look at what actually happened: The US-EAST-1 region is one of AWS’s largest and most critical data centers, hosting infrastructure for thousands of major websites and applications. When DynamoDB, a key database service, began experiencing high error rates, it created a ripple effect across AWS’s interconnected systems. This caused widespread disruptions because many applications rely on DynamoDB for data storage and retrieval operations. You see, DynamoDB is deeply embedded in AWS’s control plane architecture. Many AWS services use it internally for storing metadata, state information, and service configurations. So, when the DynamoDB API endpoint became unreachable via DNS, these dependent services couldn’t access critical operational data. The failure affected over 36 AWS services simultaneously. When DNS resolution failed, client services couldn’t locate the DynamoDB endpoints. This triggered a feedback loop similar to the September 2015 DynamoDB outage. Each retry consumed more resources, causing more timeouts, which in turn triggered further retries, creating a vicious cycle. AWS responded by pursuing multiple parallel recovery paths simultaneously, rather than waiting to identify and fix a single root cause. The primary fix involved stabilizing the DNS resolution infrastructure for the DynamoDB endpoint. AWS’s engineering teams likely: -Reconfigured or restarted DNS resolvers handling DynamoDB. -Potentially rerouted DNS queries through alternative resolution paths. -Implemented emergency DNS caching adjustments. This incident reflects the interdependence and fragility of large-scale cloud ecosystems, where even a single point of failure in a core service can cascade across dozens of systems within minutes.

We had microservices calling microservices calling microservices. One API request triggered 12 internal calls. Believe me, Tracing was a nightmare. Debugging took hours and hours. Adding a new service meant updating 5 other services. The problem isn't microservices. It's what we're missing The orchestration layer that actually works.

I strongly recommend this book: BREAKNECK by Dan Wang. It was published this year. It ,somehow , argues that China is led by Engineers while USA is led largely by Lawyers and this difference in type of leaderships has its consequences. Creating things while the other regulates etc. Read it if you want to understand some strategies of accelerating economic growth. And let me know what you think.

PRO TIP: Never use indexes on your database. They slow down writes by 50%. It's a scam by cloud providers to make you pay for more IOPS.

Major cheat code for life: Learn to delay your reaction. Anger, fear, and impulse will try to make you move fast. There's power in pausing. In the pause, you see clearly, you respond wisely, and you avoid decisions you’ll regret. Slow down to speed up.

Game theory teaches: the less invested player holds the power; if your happiness is tied to any specific outcome, you’ve already surrendered leverage. Indifference isn’t weakness, it’s insulation. And insulation creates advantage.

There is some work I do at night for @Essentiall_Ke See that 3rd order from the top, it's from ChatGPT. If you do manage a website ujue SEO is on it's way out. Try your best and optimise for AI(ChatGPT and Gemini/Bard), this is callled Generative Engine Optimization aka GEO and it will be one of the most powerful tools for discovery. I hope eventually I will get better at this 👊

YouTube: youtu.be/ztBdvyx5CUM?si…

I love how God is always protecting us! Guess who were looting supermarkets at night? Yep, the police!

This country needs the Punguza Mzigo bill back. From 2027, no MP or politician should earn anything above 200K. They also have no business having special insurance, mortgage, cars etc. I don't understand why this isn't out focus.

@__ciox__ @iamukasa @iamukasa do you own the domain?

@collo_karis I think @iamukasa has it if I'm not wrong. Ongea na yeye.

Nimeamka with the idea of buying domain ya rutomustgo and have a website giving all the reasons why he must go and info on his corrupt regime, but naona someone beat me to it. Hopefully, it will be used to inject!!

If you're in danger during a protest, run into a bar, not a church. Some of these churches will shut the gates and leave you to the bullets. At least the bar won’t judge you or lock you out. Let that sink in. Shame on CITAM church #SiriNiNumbers

Hata huwezi sema nimenunua uoga niko karibu kulia😭😭🤣 #June25th

Ive just seen another photo of Dedan Kimathi that we should be using from now on...

Leo hapo GPO I overheard a protester telling a cop..."sema wantam..niambie basi kwa maskio kama hutaki hawa wengine waskie" 😭😭😭 I have been thinking about that interaction for hours😭 #SiriNiNumbers #RutoMustGo

“Mlikuwa wapi Uhuru na matiang’i wakiua watu” to gen z’s is crazy. Most of them were in school bro. Are you mad that the new adults don’t wanna be governed poorly by the leaders they chose? That we are asking for our basic human right? Not to be shot & killed? Are you guys okay?

Thika Road is a sea of people.