DBWn会做大量的分散写（scattered write），而LGWR则是向重做日志完成大量的顺序写（sequential write）。分散写比顺序写慢多了，通过在SGA中缓存脏块,并由LGWR进程完成大规模顺序写(可能重建这些脏缓冲区),这样可以提升性能。
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With sequential write behind, pages do not stay in memory until the syncd daemon runs, which can cause real bottlenecks.
在使用延迟的顺序写操作时，在syncd守护进程运行之前，页面并不留在内存中，这可能会导致实际的瓶颈。
An interesting side effect of the copy-on-write design is that all writes to the file system become sequential writes (because remapping is always occurring).
即写即拷设计的一个有趣的副作用是文件系统的所有写入都成为顺序写入(因为始终进行重新映射)。
For JSF2, there are additional file system performance enhancements including sequential page read ahead and sequential and random write behind.
对于 JFS2，有更多文件系统性能改进，包括提前顺序页面读取以及延迟的顺序和随机写操作。
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