Latency between datacenters

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Hi Guys,

I have been planning to deploy a Ceph Cluster with the following hardware:

OSDs:

4 Servers Xeon D 1520 / 32 GB RAM / 5 x 6TB SAS 2 (6 OSD daemon per server)

Monitor/Rados Gateways

5 Servers Xeon D 1520 32 GB RAM / 2 x 1TB SAS 2 (5 MON daemon/ 4 rados daemon)

Usage: Object Storage only

    However I need to deploy 2 OSD and 3 MON Servers in Miami datacenter and another 2 OSD and 2 MON Servers in Montreal Datacenter. The latency between these datacenters is 50 milliseconds.
   Considering this scenario, should I use Federated Gateways or should I use a single Cluster ?

Thanks in advance
Daniel




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