The mark phase is responsible for tracing through all objects visible to the application and marking them as live to prevent them from having their storage reclaimed.
标记阶段负责跟踪应用程序可见的所有对象并将它们标记为活的，以免回收它们的存储。
2
The same applies to live debug, or getting an accurate characterization of storage utilization.
对于现场调试，或者得到存储使用情况的一个精确印象，上述的描述也适用。
3
Migration - Data can be easily migrated between storage locations without interrupting live access to the virtual partition with most technologies.