These are notes from my first upgrade of SharePoint 2010 to SharePoint 2013. The purpose of the upgrade is to carry out an initial test upgrade to find any issues etc. I’m not replicating the environment in terms of server roles etc. everything is installed on one server with local SQL. I followed the steps outlined here: http://technet.microsoft.com/en-us/library/cc303436.aspx
Upgrade content databases to SharePoint 2013
The SharePoint 2010 web application is configured to use Windows authentication, but Claims based authentication is required to enable the advanced functionality of SharePoint 2013. Check the authentication provider that’s in use from Central Administration -> Manage web applications. Click on the web application, then select Authentication Providers from the ribbon.
I used the process described here to convert a SharePoint 2010 classic mode web application to SharePoint 2013 claims based authentication. You start by creating the web application using PowerShell, then once the SharePoint 2010 databases have been mounted using the command below, you use PowerShell to convert the web application to claims based authentication.
Use SQL Server Management Studio to restore the SharePoint 2010 content and My Site databases.
Reapply customisations web parts and web.config changes.
Use Mount-SPContentDatabase to attach the restored database into the web application you just created. Repeat the process for the My Sites database.
Verify the database upgrade status in Central Administration -> Upgrade and Migration -> check upgrade status.
View database upgrade log files in %COMMONPROGRAMFILES%\Microsoft Shared\web server extensions\15\LOGS
Verify sites as working correctly in SharePoint 2010 mode.
Configure search and perform a full crawl.
Backup the farm.