so I was asked this question regarding our users and our products
- I quickly (less than 5 minutes) wrote up a map-reduce (+ reduce) job,
- submitted it to our array of servers,
- and in less than 10 seconds, I had the answer.

actual job code (names changed):

<%map>
    my $data = shift;

    return unless $data->{category} eq 'CATEGORY';

    return unless $data->{design};

    return unless $data->{type} eq 'TYPE';

    return ("$data->…