This copy occurs when the disk is copied to the buffer cache and then again from the file.
将磁盘的数据复制到缓冲区缓存，然后再复制文件数据时会出现多余的副本。
The proxy server can cache dynamic and static content in memory and on disk.
代理服务器可以在内存和磁盘上缓存动态和静态内容。
If all the data fits in the cache, then the data is read from disk only once; after that, all requests are satisfied from the cache at memory speed.
如果所有数据都在缓存中，那么只需从磁盘读取一次数据；毕竟，所有的请求都可以用内存速度从缓存中得到满足。
AFS can be configured to cache data locally on disk or in memory.
可以将AFS配置为在本地的磁盘或内存中缓存数据。
Therefore, when tuning the cache size for your environment, allocate sufficient in-memory and disk space for the cache entries.
因此，在为您的环境优化缓存大小时，请为缓存项分配足够的内存和磁盘空间。
If the value is 0, the disk cache will not be created.
如果该值为0，那么将不会创建磁盘高速缓存。
Typically, however, applications start out with an interface to the disk, and must be converted to an in-line cache interface.
但是，通常应用程序最开始使用的是到磁盘的接口，必须转换为内联的缓存接口。
Under normal circumstances, a write request is written directly to cache and incurs no delay because physical disk access is not required.
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。
When combined, the cache capacity on the drive, the disk algorithms used, the interface speed, and the areal density, produce a disk transfer time.
驱动器上的缓存容量、所使用的硬盘算法、接口速度和磁录密度组合到一起，就构成了磁盘传输时间。
If the requests are varied enough to make ineffective use of the operating system's disk cache, then the server's disks will become busy and at some point slow the whole process down.
如果请求的变化很大，导致无法有效地使用操作系统的磁盘缓存，那么服务器的磁盘会很忙，到了某种程度之后，就会减慢整个过程。
Utilize disk storage with fast write cache for the logs.
为日志分配一个具有快速写入缓存的磁盘存储器。
It is possible to flush the cache contents to disk, but this is not generally desired due to the fact that cache contents can become stale during the maintenance window.
这可能会将缓存涌到磁盘，但这通常并不是我们所希望的，因为在维修期间缓存内容可能过时。
This method will now work fine; however, it now follows the standard class loading delegation (cache, parent, disk).
这个方法现在工作得很好；但是，它现在遵循的是标准类装入委托(缓存、双亲、磁盘)。
This means the write-behind cache must reliably keep the data in the cache until it can be written to disk.
这意味着写入后缓存必须可靠地在缓存中保存数据，直到写入磁盘位置。
The files listed in the cache manifest get stored in the application cache, which is like the browser's standard disk cache but much more robust.
在缓存清单中列出的文件存储在应用程序缓存中，类似浏览器的标准磁盘缓存但是更为健壮。
As will be discussed later, the application talks only to the cache, and the cache talks to the disk.
我们将在下文介绍，应用程序仅与缓存对话，缓存则与磁盘对话。
This forces the cache to be reloaded from the disk, and thus the cache will be no more than 10 minutes stale.
这将强迫缓存从磁盘重新加载数据，因此缓存数据的过时不会超过10分钟。
This reduced load on the disk is the other benefit of the cache.
减少了磁盘负载是缓存的另一个好处。
Once you get the item from disk, you put it in the cache and then return it.
从磁盘中获取项之后，将其放入缓存然后返回。
Unfortunately, certain laptop hard drives now on the market have the dubious feature of ignoring any official ATA request to flush their write cache to disk.
不幸的是，现在市场上某些膝上电脑的硬盘具有这样一种不可靠的特性，即忽略将它们的写高速缓存刷新到磁盘上的所有正式AT A请求。
Even though SSD writes are faster than traditional disk writes, disk write cache typically provides good disk write performance and levels the playing field between the two types.
即便SSD写操作要快于传统的磁盘，但是磁盘写缓存通常提供良好的磁盘写性能，从而使这两种类型的磁盘可以实现相差无几的写性能。
It can be configured to offload cache to disk if the memory cache is full (via the disk offload function).
还可以设置如果内存高速缓存已满，就将缓存转存到磁盘(通过磁盘转存功能)。
If the new cache copy is not written to disk before shutdown or failure of the cache, the update is lost, and this is very bad.
如果新的缓存副本没有在关机或缓存失败前写入磁盘，更新将丢失，这非常糟糕。
A data field can be changed multiple times while in the cache before it is written to disk.
数据字段可以多次更改，在写入磁盘之前它位于缓存中。
Another way to truly make sure the data is written to disk is to turn off the drive cache.
另外一个办法是关闭你要写的磁盘的缓存功能。
The type blockio sets the disk to direct block I/O mode without page cache.
类型blockio 把这个磁盘设置为直接块I/O模式，没有页面缓存。
Note that it is normal for verboseIO to sometimes show classes being loaded from disk and stored in the cache even if they are already cached.
注意，有时候即使类已经被缓存了，verboseIO 仍然显示从磁盘装载类并存储到缓存中，这是正常的。
The snippet processor checks the cache before accessing the disk.
snippet处理器在访问磁盘之前检查缓存。
AFS client disk cache configuration.
AFS客户磁盘缓存配置。
If the data requested is not in global cache, it must be retrieved from disk and placed into cache before the Symmetrix will respond to the request.
如果所请求的数据不在全局缓存中，那么它必须先从磁盘读取，然后再放进缓存中，之后Symmetrix才会将响应返回给请求。
应用推荐