Geo-replication with existing files on destination?

[AltOscar]

Hello everyone!

So, we're setting up (testing actually) geo-replication with gluster.
We'd like to copy all our data, about 150TB.

In order to speed things up, we'd like to start copying with a regular rsync a certain directory which is about 100TB.

The thing is, from what we've tested, geo-replication overwrites files despite them being the same (same route, same checksum). This would mean copying that directory beforehand would be useless.

Is there any way to prevent this? Like a flag or something that forces gluster to read checksum before overwriting it?

Thank you all in advanced

PS: Pardon my english, not my mother tongue