run_test.rb

#!/usr/bin/env ruby
require 'rethinkdb'
include RethinkDB::Shortcuts

10.times.map do |i|
  Thread.new do
    begin
      db = i.to_s
      c = r.connect(:host => 'localhost', :port => 28015, :db => db).repl
      100.times do
        r.db_drop(db).run(c) rescue nil
        r.db_create(db).run(c)
        r.table_create('table').run(c)
        print '.'
      end
    rescue Exception => e
      puts e
      exit
    end
  end
end.each(&:join)
puts