A page is a fixed-size block of data.
一个分页就是一个固定大小的数据块。
If the size of the reallocated block is smaller than the original block, the block is split and the extra block is returned to the free tree with the required size block being returned to the caller.
如果重新分配的块小于原来的块,那么把它分割开,多余的块返回给空闲树,请求的块返回给调用者。
It contains also the names and paths, file size and block size of log files.
它还包含日志文件的名称和路径、文件大小和块大小。
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