parallel call multiple bash functions
Run them in background. And then wait for them to complete.
a() { echo "download a" wget fileA}b() { echo "download b" wget fileB}a &b &wait # waits for all background processes to complete
If you insist on using GNU Parallel:
a() { echo "download a" wget fileA}b() { echo "download b" wget fileB}export -f aexport -f bparallel ::: a bIf you need read access to variables in the shell you can either export the variables or use env_parallel.