2016-02-14, 07:27 PM
Alright I did it differently. I simply deleted the forum on the old host, leaving only simple HTML message saying it has been moved, updated the database on the new host and "reopened" the forum.
Right now some users see the forum under new IP address (and are able to use it), but others do not. We have to wait for the DNS servers to fully update.
I guess it wasn't so bad, because it made the forum's downtime shorter for everyone, but there has been a short (about an hour I think) period when two copies of the forum existed simultaneously on both hosts, visible to different users. No posts or PMs have been lost, so it should be all good.
Right now some users see the forum under new IP address (and are able to use it), but others do not. We have to wait for the DNS servers to fully update.
I guess it wasn't so bad, because it made the forum's downtime shorter for everyone, but there has been a short (about an hour I think) period when two copies of the forum existed simultaneously on both hosts, visible to different users. No posts or PMs have been lost, so it should be all good.