Key-Value Stores Aren't Simple

https://www.youtube.com/watch?v=cSzh7YwDvYI Two lines of bash, and you have a key-value store: db_set () { echo " $1 , $2 " >> /tmp/db ; } db_get () { grep "^ $1 ," /tmp/db | tail -1 | cut -d , -f2 ; } Append to a file. Grep what you wrote. Run it. It works. That's not a joke — it's the opening of Martin Kleppmann's Designing Data-Intensive Applications . Three methods on the API surface — get, put, delete — and a working KV store in two shell functions. So why is Redis 80,000 lines of C? Why ha