Logical-to-Physical Mapping的意思|示意

Metadata – Since there is a mapping between logical and physical location, the storage metadata and its management becomes key to a working reliable system.

元数据——由于有着逻辑与物理位置之间的映射关系，因此对于一个运行的可靠系统来说存储元数据的管理显得极为关键。

For example, in the layout of physical-to-logical mapping shown in Figure 1, how could the user create a filesystem of, say 150gb, since the biggest disk is 80gb large?

例如，在图1所示的物理到逻辑映射布局中，最大的磁盘是80gb的，那么用户如何创建更大(比如150gb)的文件系统呢？

The operations that may take longer with short extents include: finding extents, mapping logical to physical addresses, light scans, archives, read-ahead, and checkpoint flush.

可能由于短区段而增加操作时间的操作包括：查找区段、逻辑地址到物理地址的映射、轻量扫描、存档、预读、以及检查点刷新。

In a system of systems, typically there is a many-to-many mapping between logical elements (subsystems) and physical elements (represented in RUP se as localities or design nodes).

在一个由多个系统组成的系统中，通常会有一个逻辑元素(子系统)和物理元素(在RUP SE中被表示为位置或设计节点)之间多对多的映射。

The essential of Railway Intelligent Transportation System(RITS) is to fix on the mapping relationship between logical architecture and physical architecture.

铁路智能运输系统（RITS）结构设计的实质就是确定RITS由逻辑框架到物理框架的映射关系。