Spanner doesn't use SQL for writes it seems, so its still a significant rewrite for legacy applications (especially ones that dont use an ORM). The thing thats

Spanner doesn't use SQL for writes it seems, so its still a significant rewrite for legacy applications (especially ones that dont use an ORM). The thing thats really different here is Google are basically saying, heres this awesome system, yes it has obvious risks from partitioning, we are going to stake our reputation on those partitions not happening. In contrast AWS are saying, this is DynamoDb, its really limiting but because of those limitations it should be pretty reliable as long as you write your application correctly. It will be interesting to see if Microsoft and Amazon have to follow Google's lead here.