> "The trouble with this is that the database is the hardest part to scale." Probably depends on the plan followed for data replication, as some approaches see

> "The trouble with this is that the database is the hardest part to scale." Probably depends on the plan followed for data replication, as some approaches seem to make it easier to add new DB nodes as you scale. I've not tried it myself, but I think Apache Samza has some promising ideas in this area: https://www.youtube.com/watch?v=fU9hR3kiOK0 https://www.youtube.com/watch?v=fU9hR3kiOK0