Selective Provisioning on SharePoint 2013 Upgrade

Did you know SharePoint Server 2013 supports new site collection provisioning modes. This means you can choose which version of SharePoint Server a site collection should be provisioned in when it is created. It is designed to minimize the impact on users of upgrading to a new version of software,

You can for example elect that any new site collections created in a SharePoint Server 2013 environment are provisioned only in backward-compatible SharePoint Server 2010 mode to cater for unsupported browsers for example or in SharePoint Server 2013 mode.

Optionally, you also can allow end users or site collection admins to choose which version is most appropriate for their individual and business needs.

In addition, page rendering coexistence helps ensure your customizations will continue to work. Site collections and sites provisioned in SharePoint Server 2013 using SharePoint Server 2010 mode both look and function like a SharePoint  Server 2010 site.  They will even use the 2010 workflow engine.

One thing to watch out for though, all the limits of 2010 still apply when you chose to provision in to 2010 mode on upgrade. This doesn’t give you a way to run 2010 sites with 2013 software boundaries.