During the migration operation, all the memory that has been paged out to a paging space device is first read into real memory before being transmitted to the target server.
在迁移操作期间，换出到分页空间设备上的所有内存先被读入真实内存中，然后传输到目标服务器。
System configuration files are saved. Initial migration space is calculated and appropriate file system expansions are made.
保存系统配置文件，计算初始迁移磁盘空间并创建适当的文件系统扩展。
The additional space is needed only for the migration operation. Therefore, it can be reduced, following a successful migration.
只有进行迁移操作时才需要额外的空间，因此成功完成迁移后可以减少表空间的大小。
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