I've been testing/practicing doing a 12.0 to 12.5 upgrade using plesk-migration.
I've worked out most of the warnings/errors (some will be fixed after the migration like missing SSL certs).
The process takes almost 24hrs so far (I haven't had a totally successful run yet). Of course, I can't take the running production system offline that long.
Can the process be re-run multiple times to re-synchronize the data since the initial copy takes so long? That includes database, email, and web directories. Being that mail and web applications continue to run updating those locations during the first pass. As long as the second pass does this somewhat quickly and I can disable traffic on the old server during the second pass. Then enable traffic to the new server after the second pass completes.
I've worked out most of the warnings/errors (some will be fixed after the migration like missing SSL certs).
The process takes almost 24hrs so far (I haven't had a totally successful run yet). Of course, I can't take the running production system offline that long.
Can the process be re-run multiple times to re-synchronize the data since the initial copy takes so long? That includes database, email, and web directories. Being that mail and web applications continue to run updating those locations during the first pass. As long as the second pass does this somewhat quickly and I can disable traffic on the old server during the second pass. Then enable traffic to the new server after the second pass completes.