aliases.drushrc.php

<?php
/**
 * @file
 * Drush alias file
 * Place as ~/.drush/mysite.aliases.drushrc.php 
 * @see http://api.drush.org/api/drush/examples%21example.aliases.drushrc.php/master
 */

$aliases['mysite.dev'] = array(
  'uri' => 'mysite.de',
  'root' => '/path/to/drupal',
  'result-file' => '../tmp/dev_@DATABASE_@DATE.sql',
);

$aliases['mysite.live'] = array(
  'uri' => 'mysite.de',
  'remote-host' => '*.*.*.*',
  'remote-user' => '***',
  'root' => '/path/to/drupal',
  'result-file' => '../tmp/live_@DATABASE_@DATE.sql',
);

?>