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Dmitry: We're setting ourselves up for this. As I mentioned, physically, it's still one database; however, many shared database connections exist. But in the future, this kind of logical segregation will enable things like...we use Postgres for our database, and Postgres supports using multiple database schemas where you can get some performance benefits in actually keeping different tables in different schemas. And Ultimately, they can become their own databases running on different servers.
Dmitry: Sure. And I'll preface this by saying monolithic architecture is great. It makes sense to start with, in most cases, and you can get great mileage out of it. DHH from Basecamp has a fantastic article called The Majestic Monolith something-something where he makes this point. And at Calendly, we have only started seeing the limits of the monolithic architecture maybe a couple of years ago. We are talking about growing the company for a few years to have an established place in the market with millions of users, millions of revenue. We were able to take advantage of that architecture for a very long time. And at Calendly, in general, we are very practical. We steer away from creating technical challenges just because it stimulates us intellectually.
And then we wrote some tooling around that to essentially enable all the...Rails engines aren't really built for this kind of marginalization. Usually, Rails engines are for people to write what you can consider a Rails plugin. For example, Active Admin is implemented as a Rails engine and a number of other open-source projects out there where there's a whole pluggable piece, a mini-application that including your project may be pointed to your domain models, and it'll work. It'll have standalone pages, standalone UI that is usually implemented as a Rails engine.