I was wondering if Prod site and DR site has low bandwidth link, what strategy should I use for DR test?
1 use planned failover w/o perm failover, run on DR site for a few days, then failback to Prod site,
2 use planned failover with perm failover, run on DR site, initiate replication job back to Prod by mapping to backup copy found in Prod site until we are ready to failover again to Prod site?
Note the DR test period varies between 1-2 days to a week. And our bandwidth between the two sites is not great. Based on what I have tested, if using Method 1, failback will have to sync the delta. So if a few days have passed since the planned failover, the sync could potentially take very long to complete.
Whereas Method 2 seems to allow me to sync immediately after DR failover.
(background, we have 1 Veeam server on each site, but at any 1 time, only 1 Veeam server can do backup job i.e. when the VM in that site is in production use, we initiate the backup on that site)
So, do you guys agree that Method 2 sounds more feasible to shorten the sync time? Feel free to comment or suggest alternative ways.