对于VM(Virtual Machine)的内存状态的迁移,Xen采用了主流的预拷贝(pre-copy)的策略。结合内存迁移的策略,动态增量迁移主要分为三个阶段:PUSH阶段、停机拷贝阶段和PULL阶段。
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In continuous live migration, the active host performs pre-copy with checkpoints on a continuous basis (at the stop-and-copy phase).
在连续的动态迁移中,活动主机(在停止与复制阶段中)不断使用检查点执行预先复制。
The process of suspending the VM to migrate it to the new host is generally called stop and copy, because the VM is halted and migrated (though pre-copy may also occur).
挂起VM并将它迁移到新主机的过程通常称为停止与复制,因为是暂停VM之后才进行迁移(但也可以预先进行复制)。
Pre-built hosts files and other configuration files (to copy into your cloud instances)
预先构建的 hosts 文件和其他配置文件(可以复制到云实例中)
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