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Comment by rishav_sharan | Hacker News Reader

I am trying to understand the infra around using something like Hasura (or graphQL in general). If I wanted to make a site like HN, do I just use a hosted DB with hasura on top? Do I need to have HaProxy/NGinx for the reverse proxy between the client and Hasura?

What about caching of the results? All 100 viewers to my popular post will see the same page content and comments. Can I serve this from a cache insetad of the db, if I am using graphQL?

How will horizontal scaling work? replication? etc. I know Hasura may not be directly involved in these but I would appreciate any thoughts on these all the same.

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Think of Hasura as a layer in between your front-end application and your Postgres database. You would have needed infra to deploy your custom GraphQL server which you can replace using Hasura which gives you CRUD operations on your database with role based access control as explained here https://docs.hasura.io/1.0/graphql/manual/auth/index.html.

Hasura doesn't make any presumptions about data caching as that is highly dependant on the app requirements. It simply tries to run the most optimal SQL query on the database whenever any data is requested as showcased here https://blog.hasura.io/architecture-of-a-high-performance-gr...

Hasura is horizontally scalable as it is inherently stateless. Each Hasura GraphQL engine instance runs independentally against the underylying database it is connected with.

For replicating the Hasura GraphQL schema across environments Hasura uses its Rails like migrations tooling as explained at https://docs.hasura.io/1.0/graphql/manual/migrations/index.h....

PS: I am part of the Hasura team

If you are using Postgres as your database you can use Hasura to add GraphQL APIs on top of all the tables. Hasura can be exposed to the fronted applications with declarative permissions. You can add a reverse proxy if you want to. Hasura scales horizontally but you will have to manage Postgres on your own or use a hosted Postgres service like RDS.

> .. caching .. This is related to GraphQL in general. The support for caching is nowhere close to what is possible with RESTful APIs but it should eventually get there.

Here is my use case. I want to make a SPA. So i need to use a GraphQL client library like relay which again directly talks with Hasura. I am not sure where does the reverse proxy fits in.

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