https://distributedconcepts.com 1 https://distributedconcepts.com/lessons 0.9 https://distributedconcepts.com/lessons/build 0.8 https://distributedconcepts.com/lessons/write 0.8 https://distributedconcepts.com/lessons/stale-read 0.8 https://distributedconcepts.com/lessons/failure 0.8