You also notice that this schema does not represent all the data items from the original MIML file.
还需注意,这种模式并不表示原始 MIML 文件中的所有数据项。
When the snapshot is modified, it either retrieves the data from the original file system (if it is not modified) or it retrieves it from its own disk storage (if the original was changed).
在修改快照时,它从原始文件系统获取数据(如果原始文件系统未修改),或者从它自己的磁盘存储获取数据(如果原始文件系统被更改)。
Instead of a map to the original data, there are now new blocks with data, consuming disk space in the file system.
没有对原始数据的映射,现在只有新的数据块在消耗文件系统中的磁盘空间。
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