WordPress.org

Nothing goes in the plugins directory.

1. WordPress MU only: add this line near the top of wp-config.php:

   define('WPMU', true);

2. Upload db.php to the /wp-content/ directory. At this point, HyperDB is active. It will use the database connection constants until you complete the final steps.

3. Upload db-settings.php in the directory that holds wp-config.php

4. Edit the db settings according to the directions in that file.

5. Add this line near the top of wp-config.php:

   require('db-settings.php');

Any value of WP_USE_MULTIPLE_DB will be ignored by HyperDB. If you wish to switch off multiple DB, remove the 'require' statement from step 5.