问题
We are looking at upgrading, but management does not want to buy another server.
We currently have TFS 2012 installed. Can I install TFS 2015 beside it or will that create a problem?
I would imagine I would at least need to configure a different port for TFS web.
回答1:
No you cannot. The installer for 2015 will force you to remove the 2012 Application Tier.
Your SQL Server database server will be shareable as long as it's a version that supported by both 2012 and 2015 (SQL Server 2012 (minimum SP1)). And as long as both instances have a different database label configured.
来源：https://stackoverflow.com/questions/38770789/can-i-install-two-instances-2012-and-2015-of-tfs-on-the-same-server