Open Stack

Kemo,

The next phase of development for replication is to enable replication 
of groups of volumes [1].


I remember, in the past, there being discussion around how we handle 
replication across multiple data centers and don't know that we came to 
a conclusion.  I think we would need to better understand the use case 
here?  Are you picturing two data centers that have all their data 
replicated between the two locations. You want to then be able to have a 
Cinder access those volumes concurrently in both locations?  
Theoretically that could be possible with a shared database between the 
two datacenters.  I am not aware of anyone actually operating with such 
a configuration.

Jay

[1] https://blueprints.launchpad.net/cinder/+spec/replication-cg

On 01/13/2017 12:15 PM, Klemen Pogacnik wrote:
> HI!
> I've been playing with dual site openstack clouds. I use ceph as a backend for
> Cinder volumes. Each openstack has its own ceph cluster. Data replication
> is done by ceph rbd mirroring.
> Current Cinder replication design (cheesecake) only protects against
> storage failure.
> What about support for multi site deployments and protection of whole
> data center.
> Has any work been planned or done yet on that topic?
> Kemo
>
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