A new (old) mod has been added to the database, Ron Carnell's Mass Move/ Delete Utilities:
https://www.ubbdev.com/db/cgi/ultimatebb.cgi?ubb=get_topic&f=8&t=000020 Here is a description in Ron's words:
"Testing the new Mass Move hack was a real pain. Every single test changed the configuration of my test board and meant I had to go to the Unix prompt to move things back again for the next test. Almost immediately, I began wishing I had a Mass Unlock routine. It eventually dawned on me that many of the routines I was creating could easily be crafted to do exactly the kinds of things I needed. I was essentially writing routines to sweep through a forum and perform a number of operations on it. Once the code was written to sweep through a forum, it wasn't difficult to add new functionality.
Mass Move
The only thing this program has in common with my original Mass Move hack is the name. The code is entirely new and optimized for just one thing - SPEED. It's also a little less likely to bring your server to its knees. Using settings that duplicate the functionality of my original Mass Move hack, which effectively rebuilt all files on-the-fly, it is roughly twice as fast as the old code. Using optimum settings, which delays rebuilding until all topics are moved, it is at least a hundred times faster. Using the highest possible settings (which I don't recommend on anything but a dedicated server), my best times were 24 seconds for the move operation, 8 seconds to rebuild threads, and an additional 126 seconds to Update all HTML pages. That's less than three minutes to move 4,000 topics composed of 23,932 posts. Your mileage will certainly vary.
This program is a stand-alone utility and requires no changes to the UBB scripts. Installation instructions are at the top of the code. While I feel I've tested it pretty thoroughly, there are so many combinations of possible options that it's impossible to test them all. As always, please backup your forums before using! Let me know if you find an option set that doesn't work together. I'd also be very interested in hearing some reports on speed.
I will be adding the other options on the menu as time permits, probably in the order listed. "