在正常的环境中，一个写请求是直接写入到缓存中而不会引起延迟的，因为它不需要访问物理磁盘。
Under normal circumstances, a write request is written directly to cache and incurs no delay because physical disk access is not required.
显然，对于磁盘上的物理文件和用来访问页面功能的URL而言，URL路径选择特性隔离了两者之间的关联关系。
The URL routing feature explicitly breaks the connection between physical files on disk and the URL that is used to access a given bit of functionality.
如果磁盘在大小或速度方面有差异，可以通过设置卷尽可能利用磁盘的特性，比如把不经常访问的数据放在比较慢的物理磁盘上。
If the disks vary in size or speed, you can place volumes to take best advantage of the disks' characteristics, such as putting seldom-accessed data on a slower physical disk.
该设置包括一对构成群集服务器(ha1和ha2)，两者都可以访问包含多个物理磁盘的磁盘盒；服务器处于冷备份模式。
The setup consists of a pair of clustered servers (ha1 and ha2), both of which have access to a Shared disk enclosure containing multiple physical disks; the servers are in cold standby mode.
最新研究表明，基于磁盘准确的物理特性进行相应的磁盘访问优化是提高磁盘I/O的有效方法。
Recent researches indicate that one of the efficient I /O optimizing methods is the disk access optimizing based on the physical features of the disk.
增加内存可以直接提高系统的性能，因为直接访问物理内存比访问存储在磁盘上的高速缓存要快得多。
By increasing the RAM storage, you directly increase the performance of the system, because direct accesses to physical memory work much faster than accesses to disk-stored caches.
增加内存可以直接提高系统的性能，因为直接访问物理内存比访问存储在磁盘上的高速缓存要快得多。
By increasing the RAM storage, you directly increase the performance of the system, because direct accesses to physical memory work much faster than accesses to disk-stored caches.
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