主复制要求所有节点通过访问主节点来获得关于表、列和主键的字典信息。
Master replicates require all nodes to access the master node to obtain the dictionary information about tables, columns, and primary keys.
每个节点通过此节点的properties属性声明当前安装的那个执行环境。
Every node declares the execution environment currently installed by way of the properties attribute of the node.
图4 . Delimited——FileInput节点通过确定分隔符来拆分每次传播。
Figure 4. Delimited — Each propagation is split from the next by the FileInput node identifying delimiter characters.
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