Recall that a journaled file system keeps a log (journal) of the file operations.
日志式文件系统通常维护一份关于文件操作的日志。
Sharing data via a common UNIX file is simple, because it USES familiar file operations.
通过一般的UNIX文件共享数据很简单,因为它使用大家熟悉的文件操作。
A ring buffer makes logging efficient by using memory operations in place of file operations.
通过使用内存操作代替文件操作,循环缓冲区使得日志记录的效率更高。
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