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Step 1. Identify the problem

A problem can be one of 3 things: (1) deviation from the standard (2) gap between the ideal and reality (3) unfulfilled customer need


The trickiest part of living a life is you never know which part is reality (if there ever is) and which part is just a mental artifact. They intertwine with each other and always have power over your own will.

Maybe this is just me, as I grow older, I…

Let’s just calculate cost and benefits~


  1. Forced learning. Institutionalized process always help you decrease the demand for self-discipline, it’s much easier to stick to the end because of the environment as well as the sunken cost.
  2. Systematic learning in computer science, broaden my horizon for topics I would not consider learning on my own, learn more…

  1. Want exact match of string without applying analyzer: define the type to be keyword , not text
  2. Add data in bulk: curl -H "Content-Type:application/json" -XPUT --data-binary @movies.json
  3. Handle concurrency: use if_seq_no=10 or retry_on_conflict=5 for optimistic concurrency control.
  4. Choose between normalization or denormalization: normalized data minimizes the data storage and…

From Georgia Tech Course Software Development (
  • reset is a limited version of checkout or branch -f

1. Log

alias graph="git log --all --decorate --oneline --graph"

git reflog

2. Change history in one branch:

(1) add new file without creating new commit:

git commit --amend --no-edit

(2) modify comment:

git commit --amend -m "this is the right…

Why does anyone want to go through the frustration and hopelessness to achieve anything?

(1) what’s the point of being successful? (Besides suffering itself. Ego and rewards will stop justifying the cost at some point) (2) you cannot even prove you live in reality.

It takes some luck, naivety and…

1. Set up your K8s

You can follow my first blog in this series to set up the cluster, just do not do the last step — delete the cluster

2. Download all the yaml file to tell k8s what to do

Once you set up the cluster, download all the yaml file from github and put them all together into a folder called “k8s-demo”. Each of…

It may seem daunting to run kubernetes commands, but once you learned its main components, the rest is just about learning the syntax to tell kubernetes what you want to do.

1. Main Components of K8s

We all know K8s is an orchestration tool, but what does that mean exactly? The most basic understanding can…


I am a machine learning engineer. I love working on projects related to mental health and small business using NLU and 3D modeling.

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