Hi all, I'd like to start discussion on whether the servicegroup in Cinder is necessary. Recently, cinder can only support db driver, and doesn't have servicegroup concept. our team wants to implement the servicegroup feature using on tooz[1] library. Like nova[2], when the state of service is required, it can be got through servicegroup. Besides, due to the cinder-volume-active-active-support[3] merged, we think it makes the Service Group do more. Before the cinder-volume-active-active-support was proposed, Cinder has no concept of cluster. Therefore, we have a doubt that, if without cinder-volume-active-active-support, is it necessary to add feature of servicegroup? Any comments or suggestions? [1] https://github.com/openstack/tooz/blob/master/doc/source/tutorial/group_membership.rst [2] https://github.com/openstack/nova-specs/blob/master/specs/liberty/approved/service-group-using-tooz.rst [3] https://github.com/openstack/cinder-specs/blob/master/specs/mitaka/cinder-volume-active-active-support.rst Best Regards, Janice
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