Lots of talk but not a lot of info online. This worked for me I'm enabling replication t pool level here. Not only images that have the 'journaling' feature enabled will be mirrored irrespective of the state of your pool. So to clarify, you need to enable replication on the pool AND enable the journaling feature on the …

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RBD export works great, sometimes too great and can overload the disks it's writing too, if those disks happen to be serving say VM's then goodnight VM. Solution - Use throttle Example - Export at 50MB\s 1rbd export volumes/volume-371b6662-1bc2-4dad-8545-c30ec1f0bfce - | python /root/throttle.py --bandwidth=52428800 …

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Check replication See how much journal data is yet to be replicated, where 'sas' is the pool containing the journal data 1rados ls -p sas | grep journal | wc -l Enable mirroring for an image Step 1 - Enable journaling feature for the image(You can place the journal data on a separate pool) 1rbd feature enable …

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