Setting options() in workers

[datawookie]

Hi,

Firstly, thanks for furrr: it's a complete game changer!

I've been trying to use future_map2() over a function which is submitting requests to a (local) OSRM server.

At the top of my script I have the following:

library(furrr)
plan(multiprocess)

library(osrm)
options(osrm.server = "http://127.0.0.1:5000/")

Here the call to options() is ensuring that the OSRM requests go to the local server. However it seems that inside future_map2() these options are not propagated to the workers, with the result that the requests are going to the public OSRM server... which is taking massively longer, completely defeating the objective of running the requests in parallel.

The weird thing is that I haven't run this script in a while and I'm almost 100% certain that the last time I did run it this all worked.

Anyway, I was just wondering whether there is some special incantation that I can use to get this option to apply to the workers?

Thanks a lot!

Best regards,
Andrew.

[datawookie]

Hi @DavisVaughan, just been chatting to a colleague who suggested setting these options inside the function which I'm running in parallel. That seems like a good option to me. Are there better alternatives? Thanks, Andrew.

[Ax3man]

This is a future issue: futureverse/future#134

[Ax3man]

also answered already here: #36

[datawookie]

Thanks. Helpful link!