Hello 👋 I'm Ken. I love writing and editing, as well as reading a variety of books not only from Technology but also from Social Sciences, Neuroscience, and History. These blog posts are mostly about Technology, Health & Well-being, and about our society.

  1. Coupons page is created

    October 16, 2022
    What is a "coupons page"? My "coupons page" is created. This page lists the invitation code or friend coupons that I can share with you. https://kenwagatsuma.c…
  2. Apache Kafka ASCII Arts

    October 15, 2022
    This blog post shows some ASCII arts describing the concepts of Apache Kafka. I made them just for fun :) Enjoy! Consume Group Partition <-> Consumer Producer
  3. Merkle Tree

    October 15, 2022
    What is Merkle Tree a tree-like data structure every leaves is labelled with the hash of a data block every node is labelled with the cryptographic hash of the…
  4. Developing Cloud v.s. Using Cloud

    October 13, 2022
    Currently, I'm working as a Site Reliability Engineer (SRE) for a database company that offers fully managed Database-as-a-Service (DBaaS). Before joining the …