文件名称:Aggregator的处理-北京中科信软DataStage培训
文件大小:8.71MB
文件格式:PPT
更新时间:2016-04-09 09:57:08
DataStage
Aggregator的处理 Input Link必须是根据主键的Hash排序,否则需重新排序 Option中的Method设为Sort,可改进运行效率 * Hash partitioning guarantees that all the records with same key column values are located in the same partition and are processed on the same node.