Parallellizes stdin processing to a number of child processes.
Grab the binary from the relases page.
Perform line count in four parallell processes.
$ para -children=4 "wc -l" < /usr/share/dict/words
150230
152295
150174
151689
Perform a massively parallell grep. The -quiet flag suppresses
Warning: exit status 1 (child exited with error) for each of the
greps that exit without finding the search string.
$ para -children=64 -quiet "grep earde" < /usr/share/dict/words
bearded
bearder
nonbearded
unbearded
Split a file into eight (the default number of children) pieces.
$PARAIDX is set to the child number for each child process. Note
though that this is not the same sequential split as split does but a
random(-ish) spread of lines into files.
$ para "cat > part.\$PARAIDX" < /usr/share/dict/words ; ls -l part.*
-rw-r--r--+ 1 jb staff 525350 Mar 1 21:45 part.0
-rw-r--r--+ 1 jb staff 536848 Mar 1 21:45 part.1
-rw-r--r--+ 1 jb staff 585446 Mar 1 21:45 part.2
-rw-r--r--+ 1 jb staff 513315 Mar 1 21:45 part.3
-rw-r--r--+ 1 jb staff 527953 Mar 1 21:45 part.4
-rw-r--r--+ 1 jb staff 520258 Mar 1 21:45 part.5
-rw-r--r--+ 1 jb staff 536501 Mar 1 21:45 part.6
-rw-r--r--+ 1 jb staff 547481 Mar 1 21:45 part.7