Resolve the I/O backend for a FLARE run from config$run_config.

Returns one of "faasr", "s3", "local". Errors if use_faasr=TRUE while use_s3=FALSE; FaaSr mode is always cloud-backed. Falls back to "s3" with a warning when use_faasr=TRUE but the FaaSr RPC stubs are not loaded into globalenv(), i.e. when not running inside a FaaSr container.

Usage

flare_io_mode(config)

Arguments

config

FLAREr config list (must contain run_config$use_s3 and optionally run_config$use_faasr).

Value

Character scalar: "faasr", "s3", or "local".