事务日志可以通过严格或宽松的记录方式进行配置，其中，严格的日志记录将把已提交事务同步写入到磁盘，而宽松的日志记录将异步写入事务。
Transaction logging can be configured using strict or relaxed logging, where strict logging writes committed transactions to disk synchronously and relaxed writes transactions asynchronously.
不再把实例数据写入页面，而是从服务器异步检索数据然后将其动态增加到页面模型中。
Instead of writing the instance data to the page, you'll retrieve it asynchronously from the server and then dynamically add it to the model on the page.
对于异步复制，顺序是一样的，但是无需等待目标节点确认已经收到写入操作，就可以完成生产节点上的写入操作。
With asynchronous replication, order is preserved, but the write is allowed to complete without waiting for an acknowledgement from the target node that the write has been received there.
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