Might Google in the future add a GTFS-RT with persistent gRPC streaming ?

[Shashank]

Hello community, 

I was wondering if Google is thinking of implementing the streaming or ingest of gRPC based GTFS-RT data. Right now it is proto files at certain intervals. 

gRPC eliminates the proto files effectively eliminating file structure and Redis can come into picture on the server side(Like a transport agency being a source)

What are your thoughts on this ?? 

[Andrew Byrd]

Hello,

I cannot speak for what Google is doing, but among GTFS producers and consumers it has been common to distribute GTFS-RT messages incrementally/differentially via message queue systems for over a decade. The technologies in use may not be the ones you mention, but the principle of sending small messages with low latency rather than repeatedly fetching a file is there.

This practice is not very well documented, but there is a Github issue about updating the spec where I have collected some examples of GTFS-RT producers using this approach and some characteristics of their systems:

https://github.com/google/transit/issues/84 

Regards,

Andrew

--

You received this message because you are subscribed to the Google Groups "GTFS-realtime" group.

To unsubscribe from this group and stop receiving emails from it, send an email to gtfs-realtim...@googlegroups.com.

To view this discussion visit https://groups.google.com/d/msgid/gtfs-realtime/d72cded5-335f-4eb8-9ece-8938362fd7e3n%40googlegroups.com.