If the migration is a ‘cold’ migration (service is passivised and offline during migration), OCCI’s features to stop and restart the virtual machines, network resources, etc. can be used.

如果迁移是“冷”迁移（在迁移过程中服务被终止活动并下线），可以使用OCCI的终止和重启虚拟机、网络资源等特性。

youdao

Migration is simply a failover that never fails back, and scaling up is a failover in which the primary node never goes offline.

迁移不过就是永不退回的故障转移，扩展是永远不将主节点置于离线的故障转移。

youdao