The advantage of replication is that reads are always local, as everybody has the data, and there is no re-balancing going on when a new node joins or an existing node leaves the cluster.
这种复制的优点在于它通常只在本地节点读取数据，因为每个节点都拥有这些数据；另外，当群集中有新节点加入或者需要移除现存节点的时候，它也不需要重新进行负载均衡。
In asynchronous mode, the write transaction is acknowledged after the write data is stored on the local node's storage; the replication of the data to the peer node occurs in the background.
在异步模式下，写数据被存储到本地节点存储中之后，写事务被认可；对等节点中的数据的副本出现在后台中。
When a client is writing data to an HDFS file, its data is first written to a local file as explained in the previous section. Suppose the HDFS file has a replication factor of three.
流水线复制当某个客户端向HDFS文件写数据的时候，一开始是写入本地临时文件，假设该文件的replication因子设置为3，那么客户端会从Namenode获取一张Datanode列表来存放副本。
Before putting replication data into the send queue, the source server first converts the data from the local table dictionary format to the master replicate dictionary format.
在将复制数据放入到发送队列之前，源服务器首先将数据从本地表字典格式转换为主复制字典格式。
Similarly, before applying replication data, a target server first converts replication data that is in mastered dictionary format to the local table dictionary format.
类似地，在应用复制数据之前，目标服务器首先将主字典格式的复制数据转换为本地表字典格式。
Using databases and other data sources that are local to the Web server makes replication and back-ups difficult and also increases the load on the Web server.
使用数据库和Web服务器上的本地数据源将增加复制和备份的难度，并且加重了Web服务器的负荷。
This topic explains how to recover data when an active database and its log files that are enabled for local continuous replication (LCR) become corrupt.
本主题说明为本地连续复制(LCR)启用的活动数据库及其日志文件已损坏时，如何恢复数据。
This topic explains how to recover data when an active database and its log files that are enabled for local continuous replication (LCR) become corrupt.
本主题说明为本地连续复制(LCR)启用的活动数据库及其日志文件已损坏时，如何恢复数据。
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