Openrouteservice self hosting queries

Hello everyone,

I am new to this forum. I am looking to self host openrouteservice in AWS . I am going to follow the recommendation mentioned in System Requirements | openrouteservice backend documentation for system requirements. I am looking to use 128GB RAM instance to import all planet data and the various profiles as per the recommendation. However, I am wondering what would be the operating/running vCPU and RAM recommendation after import?. The document only mentions that running openrouteservice will require a much smaller RAM compared to import.

Also, wondering, do I have to rebuild the entire planet graph everytime OSM update is available?

The link Data: Input and output folders and files | openrouteservice backend documentation) also mentions that GTFS data can be added to openrouteservice as follows:

GTFS

The public transport profile integrates [GTFS] data for the public transit part. GTFS feeds can be obtained e.g. from sites like for Germany, or from local public transport operators.

Configuration parameters: [ors.engine.profiles.*.gtfs_file]

Wondering, how do I import the GTFS data with openrouteservice for the whole world , if I have access to 2000+ GTFS feed data?

Would be great if anyone can provide response to my queries. Thanks in advance !