Replication should be in 2 backends. You may look at http://www.emc.com/collateral/white-papers/h12079-vnx-replication-technologies-overview-wp.pdf Thanks, -Ruijing From: Chenzongliang [mailto:chenzongliang at huawei.com] Sent: Thursday, February 12, 2015 9:20 AM To: OpenStack Development Mailing List (not for usage questions) Subject: [openstack-dev] Questions about remote replication According to the blueprint description(https://blueprints.launchpad.net/cinder/+spec/volume-replication) The Create volume with the replication enabled: * the Scheduler selects two hosts for volume placement and sets up the replication The DB entry When reading the related scheduling module code, I can not found the process about this. I want to know where is to implemented this part of flow?If there is, whether the two volumes in different backend? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20150212/cb79d9a3/attachment.html>