Whenever an application commits a transaction, dirty pages are written directly into the PowerHA pureScale server.
每当应用程序提交事务时，脏页被直接写到 PowerHApureScale 服务器。
This parameter determines the threshold percentage of dirty pages in the buffer pool at which page cleaning will be initiated.
这个参数决定缓冲池中脏页的阈值百分比，当脏页达到这个百分比时，就会启动页清除。
The reason for this is to limit the amount of dirty pages in memory, which further reduces I/O overhead and disk fragmentation.
这么做可以限制内存中 “脏”页面的数量，从而进一步减少I/O开销和磁盘碎片。
Transactions requiring disk I/O, such as flushing dirty pages from the buffer pool or flushing logs from the log buffer, may wait.
要求磁盘I/O 的事务，例如刷新缓冲池中的脏页或者刷新日志缓冲区中的日志，可能需要等待。
This recovery process instantly begins to prefetch dirty pages from the centralized buffer pool into its own local buffer pool.
这个恢复进程立即开始将脏页从集中式缓冲池预取到它自己的本地缓冲池。
This data initializes the transaction table, dirty pages table, and open file table so they can be used in the recovery process.
这些数据将初始化事务表、脏页表和打开文件表，以便它们能够用于恢复过程。
SecondSite also found that compression of dirty pages could yield as much as an 80% improvement in bandwidth for a single VM replication.
SecondSite还发现，压缩脏页面能够将单次VM复制的带宽提高80%。
Having the checkpoints occur at this high a frequency minimizes the number of dirty pages that must be transferred and also minimizes the buffering cost for network and storage frames.
让检查点以如此之高的频率出现，不但可以让必须传输的脏页面的数量降至最低，而且还最大限度地降低网络与存储帧的缓存成本。
This results in a noticeable delay as a function of the number of pages (dirty working set) to migrate from the old to new host.
如果从旧主机迁移到新主机的页面数量众多(脏工作集)，则会导致十分明显的延迟。
Note that some pages can refer to files, in which case, the data can be flushed if dirty (through the page cache) or, if the page is clean, simply discarded.
注意，一些页面可以指向文件，在这种情况下，如果页面是脏(dirty)的，数据将被冲洗，如果页面是干净的(clean)，直接丢掉。
Memory pages that are modified during the transfer are marked as dirty.
在传输期间修改的内存页面被标为dirty。
This process is repeated until the number of pages marked as dirty are no longer decreasing.
内存复制过程会重复进行，直到标为dirty的页面数量不再减少为止。
This process is repeated until the number of pages marked as dirty are no longer decreasing.
内存复制过程会重复进行，直到标为dirty的页面数量不再减少为止。
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