There is no way to copy the artifacts as a promotion to another directory. When using existing plugins (promotion + scp) the jobs execute on the wrong slave.
What I really want is the archived artifact from the master (not the masters workspace, or the original slaves workspace, but what the master serves from the UI) to be copied into another directory.
The artifacts from hudson are so large that we can no longer back them up across a single 60GB tape. So we want to promote specific QA-approved artifacts and copy them to another directory which IS backed up. The ability to delete artifacts while retaining metadata would also be helpful, but is unsafe and destructive rather than making another copy in a separate location.