Hi everyone! Our migration went reasonably smoothly but not perfectly.
Our first attempt to backup and restore the (compressed) 33GB* of core Mastodon files and databases failed. We tried again with uncompressed data and the migration worked perfectly.
The whole process took just over an hour.
The instance should now be more responsive, and we have plenty of room for future growth.
* Our media is stored in external object storage totalling around 1TB, but didn't have to be moved.