Drupal 7

Upgrade from Drupal 6 to 7, how hard is it?

Updates

  • May 2012 - One year have past since I initially wrote this article. Upgrading these days from Drupal 6 to 7 have become easier, safer, and a lot less nerve wrecking, though it will never become a cakewalk.
  • May 2015 - Started writing a longer series using Migrate and Migrate D2D.
  • May 2015 - Cleaned up language a corrected grammar erros.

To migrate or upgrade?

As writing do I still have a few more complex sites running on Drupal 6. Knowing these sites, their complexity, and all existing glue code, a fast and easy upgrade will be hard pull off. It might be easier for complex sites to only migrate the content using modules like migrate and migrate_d2d.

A data migration

  • Do a clean Drupal 7 installation.
  • Build basic needed content types and configurations.
  • Recreate the theme in D7 or port you existing CSS/SASS styles.

Then migrate your content by using modules like http://drupal.org/project/feeds, or for even more flexibility and power http://drupal.org/project/migrate. I'll promise do a blog post of a more complex Drupal 6 to 7 migration as soon as my remaining sites are running Drupal 7.

Part of the ELMCIP research project for the next two years

I joined the ELMCIP Project in July 2010, and will be busy working on this project for the new two years. This does not mean, that I'm not available for other contract work/projects, but this will reduces my availability by about 10-15%.

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