title: SSIS, dtsx and deployment packages
body: <p>I'm just trying to understand SSIS packages a bit better and how they are deployed. Correct me I'm wrong but for any deployment, I believe there needs to be at least two files a .SSISDeploymentManifest and a .dtsx. The .SSISDeploymentManifest  acts as the equivalent windows installer package which points to the .dtsx. The dtsx is the actual package of "stuff" that is referenced as an external file some how when you run the installer. When you install it, the package gets added to a list of ssis packages for that instance.</p>
  
  <p>My further questions:</p>
  
  <ul>
  <li>If i wanted to keep previous version of the same package, can I just copy the bin directories with the two above files and keep separately should I need to roll back to a previous package?</li>
  <li>Where are these packages installed to? How does SSIS know where the packagess are?</li>
  </ul>