week report 2024.04

Entertainment

YOASOBI Haneda Zepp Live

First and best live ever.

Learning

nothing, I think

life

• bought a new iPhone to replace current se2
• after finish AWS courses, I didn't know what's next
• weekends? wasting time on Dota2 games, didn't feel like doing anything

Sharing

K8S Lessons

1. use Kubernetes in the clouds
2. deploy your entire Kubernetes-related infrastructure with code
3. avoid overusing helm charts that you don't fully control
4. Kubernetes doesn't like lift and shift
   1. you have to update the apps to be cloud-compatible
5. avoid multiplying tools
6. you must always define resource limits allocated to your pods
7. think stateless
8. configure HPA - Horizontal Pod Autoscaler
9. don't be afraid of change

References

• https://github.com/gunnarmorling/1brc/discussions/57
  • sort 1 billion records in a file (by using the fastest method)
  • mmap whole file, split it into slices (one per core), collect partial results and merge.
• https://blog.robertelder.org/how-to-make-a-cpu/
  • image based, how to make a CPU
• https://hervekhg.medium.com/3-years-managing-kubernetes-clusters-my-10-lessons-b565a5509f0e

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