It's interesting that apart from the DynamoDB and the SQL Warehouse (Redshaft?) there's a pretty large LevelDB instance serving the sites/services.
I also wonder if in reality there were only one or two instances in each zone for each site behind the ELBs and the others were added to show how scalable the infrastructure is; or if their number actually did correspond to the avg. number of instances they ended up having to spin up.
I also wonder if in reality there were only one or two instances in each zone for each site behind the ELBs and the others were added to show how scalable the infrastructure is; or if their number actually did correspond to the avg. number of instances they ended up having to spin up.