grpc_retry: why linear backoff and not exponential

[aybabtme]

ohai!

Just wanted to know why the backoff strategy used here was linear, versus exponential? Was it an omission, a lack of opinion or a choice made on purpose?

[mwitkow]

Hey,

I wanted to implement exponential backoff, but the flight I was in wasn't long enough. And for most gRPC errors we encounter (e.g. connection reset which signifies Unavailable) a simple linear is enough.

Happy to accept PRs though! :)

[chimeworld]

I'd like to work on this if it's still needed.

[johanbrandhorst]

This is already supported.