然后在逻辑卷上创建文件系统，这就像传统配置中的分区。
File systems are then created on logical volumes, which are treated much like partitions in a conventional configuration.
exofs 背后的思想是在 OSD 后备存储上提供一个传统文件系统。
The idea behind exofs is to provide a traditional file system over an OSD backstore.
例如，LogFS在flash设备中保持了一个树结构，因此挂载时间和传统的文件系统差不多(比如ext2)。
For example, LogFS maintains a tree structure on the flash device itself so that the mount times are similar to traditional file systems, such as ext2.
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