We currently MMR replicate through an OpenVPN tunnel between Texas and Poland without any issues. Even if the tunnel goes down for some reason, once it comes back up they resume replication without intervention. Since we nearly only make changes here in Texas that just means that Poland falls behind in replication and might for example have old passwords in LDAP and Kerberos (which is LDAP backed), but otherwise doesn't break anything.

On Mon, Apr 14, 2014 at 4:00 PM, Elizabeth Jones <bajones@panix.com> wrote:

Have any of you encountered issues with replication over long distances,
such as between data centers? We have a master in each of our data
centers and a consumer at each data center, but all changes are pretty
much made at data center A and then replicated to its local consumer, then
across our mpls to the master at data center B. For the second time in
two months now our two LDAPs at data center B have gotten corrupted and I
have had to reinitialize them from the master in data center A. Are there
any replication tricks for long distance replication that could keep this
from happening?

thanks -
EJ

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