执行预读和后写请求都需要用到该守护进程。
This daemon is required to perform both read-ahead and write-behind requests.
而且，对于那些受益于文件系统预读功能或者较高缓冲区缓存命中率的应用程序，可能会出现性能的降低。
Further, applications that might benefit from having a file system read ahead or high buffer cache hit rates might actually see performance degradation.
可能由于短区段而增加操作时间的操作包括：查找区段、逻辑地址到物理地址的映射、轻量扫描、存档、预读、以及检查点刷新。
The operations that may take longer with short extents include: finding extents, mapping logical to physical addresses, light scans, archives, read-ahead, and checkpoint flush.
在读取方面使用中间内核缓冲区，可以允许内核缓冲区在应用程序不需要内核缓冲区内的全部数据时，充当 “预读高速缓存（readahead cache）” 的角色。
Using the intermediate buffer on the read side allows the kernel buffer to act as a "readahead cache" when the application hasn't asked for as much data as the kernel buffer holds.
然而，有一种预读，的确可以加深你对一部名著的理解，就是预读名著作者本人读过的其他名著。
There is one kind of prior reading, however, which does help you to read a great book, and that is the other great books the author himself read.
预读编辑功能。
可以对医疗监护信息预读，发现问题，直接通知家庭其他成员，达到及时救护的目的。
Moreover, it can further detect symptoms of a person by pre-reading collected information, and directly notify his family of the symptoms for prompt treatment.
在数控铣微直线加工程序预读、直线段间平滑算法的基础上，提出了线性变换圆弧平滑算法。
On the base of the program pre-reading and the smooth algorithm between lines for micro-beeline machining of CNC milling, the arc smooth algorithm with linear transformation is brought forward.
在数控铣微直线加工程序预读、直线段间平滑算法的基础上，提出了线性变换圆弧平滑算法。
On the base of the program pre-reading and the smooth algorithm between lines for micro-beeline machining of CNC milling, the arc smooth algorithm with linear transformation is brought forward.
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