但因为XML文档在块级别格式中是从任意位置断开的,因此有必要记录打开元素(块在其中开始)的堆栈。
But since XML documents are broken at arbitrary positions in the block-level format, it is necessary to record a stack of open elements where a block begins.
象reiserfs一样,XFS使用逻辑日志;即,它不象ext3那样将文字文件系统块记录到日志,而是使用一种高效的磁盘格式来记录元数据的变动。
Like ReiserFS, XFS USES a logical journal; that is, it does not journal literal filesystem blocks like ext3, and instead USES an efficient on-disk format to log metadata changes.
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