You can copy the whole database, related objects, or a single object at a time.
可以一次复制整个数据库、多个相关对象或单个对象。
This is because a copying collector does not need to visit or copy dead objects, only live ones.
这是因为,拷贝收集器不需要访问或拷贝死对象,只处理活动对象。
These copy groups contain the crucial attributes that control the expiration of objects of this type (archive or backup objects).
这些副本组包含一些至关重要的属性,这些属性控制着某种类型的对象(归档或备份对象)的到期时间。
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