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。

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.

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可替换性：可替换性有两个方面：冷替换(允许jvm重启)和热替换(无需J VM重启)。

Replaceability: There are two aspects of replaceability: cold (JVM restart allowed) and hot (no JVM restart).

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