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Deciding When to Upgrade to Drupal 8

Since Drupal 8 was released last November, the community has been experimenting, and optimising the upgrade process for Drupal 6 and Drupal 7 sites.

Thanks to the hard work of a large number of (often volunteer) module maintainers, the number of upgraded modules is increasing day by day. Module availability is a key factor in the site upgrade process, so this is really good news.

In this post we’ll review some of the tools that have been developed to ease this process.

As every site’s upgrade process is unique, there is no such thing as a universal rule. There are many differences, such as time constraints, the upgrade budget, the features of the site, whether you want to do a large overhaul or you just want to preserve the functionality of your site, etc.

Fortunately, there are some tools available that can help you plan when and how to upgrade. We will show you three of them.

Ready?

When is your site ready to upgrade to Drupal 8?

An easy answer to that question would be: When all contributed modules used by the site have a Drupal 8 version. But it is not that simple.

For example, when can you consider a module to be “ready?”

Each module is a case on its own, with different functionalities, so there isn’t a perfect, general answer to that question. As a rule of thumb we could take  the first recommended 8.x release of a module, regardless if it’s a release candidate (RC), alpha or beta, to be the point when we regard it to be “stable enough” to start to consider using it.

A module doesn’t need to be stable to include it in a site upgrade: there may be cases when a module’s functionality works well, but the module as a whole is just a release candidate. In a case like this, you have to go deeper and investigate the state of the module according to your specific use case.

This module has a recommended 8.x release, a good sign.

Since Drupal 8 is now compatible with Symphony, it can be extended with Symphony components, an in-between option between full-on custom code and community-contributed Drupal modules. There are, for example, developer teams that have shipped Drupal 8 sites with search functionality implemented with the ElasticSearch extension for Symphony, instead of Drupal’s Search API module that was not yet production ready. This means, however, that your site might have a higher maintenance cost, and that it will be harder to extend your site in the future, since you will be depending on custom code.

If you want to work predominantly with contributed modules, you will need to wait until the required modules have been upgraded to at least a “recommended release” status, or you’ll have to get involved in the porting process, which could impact the time/scope/budget for your project (but also has many advantages). There is also a risk that the feature space of a module will have changed between major versions and that you won’t be able to do a straight port. So even if you work with a low custom code requirement, it is possible you will have to reconfigure modules to get to a satisfactory outcome.

 

 

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