> "And secondly, even if it were massive, it's not massive per-property which is the only thing that matters in terms of transactions here. Database sharding in

> "And secondly, even if it were massive, it's not massive per-property which is the only thing that matters in terms of transactions here. Database sharding in this case is incredibly straightforward, compared to many other types of websites. And in both cases, just use standard database transactions." This is such an important point that a lot of software devs don't get. If you think about the shape of the data, you can often find ways to naturally partition the data so that you are dealing with much smaller scale.