A minimal template for using purrr ≥1.1.0 on the UAHPC

purrr.R

library(purrr)
library(mirai)
library(carrier)

#launch SLURM jobs
daemons(
  n = 3, #number of SLURM jobs to launch
  url = host_url()["enp1s0f1np1"],
  remote = cluster_config(
    command = "sbatch",
    # For all options see: https://hpcdocs.hpc.arizona.edu/running_jobs/batch_jobs/batch_directives/
    options = "#SBATCH --job-name=mirai
               #SBATCH --account <your account name>
               #SBATCH --partition=standard
               #SBATCH --nodes=1
               #SBATCH --ntasks=1
               #SBATCH --time=00:01:00
               module load R/4.4" #load other necessary modules here
  )
)

# Use purrr with in_parallel() to parallelize using SLURM jobs
# See more here: https://www.tidyverse.org/blog/2025/07/purrr-1-1-0-parallel/#distributed-computing-made-simple
mtcars |>
  map_dbl(in_parallel(\(x) {
    Sys.sleep(10)
    mean(x)
  }))

daemons(0) #close the SLURM jobs