Hi folks,
My RHEL7 project is considering using DRBD to create sets of 2 x
2-nodes that replicate synchronously across two data centers. The
first half of each set would consist of a primary and a secondary with
the latter taking over in case of failure (Heartbeat-based Pacemaker
cluster). However, the same block device(s) should also replicate to
the second half of the set in the second data center. Crucially, it
should be possible to turn these roles around without too much effort
when the choice is made to make the second data center active and the
first one passive.
Is this possible with DRBD and if so, what kind of replication
configuration should be used?
Thanks,
Jaap
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