hi, i'm very confused when i use MapsideJoinStrategy. the origin constructor was deprecated, instead, LoadLeftSideMapsideJoinStrategy was recommended, the main improvement is that load left side table in memory, whose size is large than right side. however, when i want to use mas side join, the left side table usually is too large to store in memory.
for example i have to table A and B, we need A left join B, and size(A)>>size(B), naturally we want to use map side join, and use A as left side, B as right side, then load B in memory to process, it's very simple. However, if we use LoadLeftSideMapsideJoinStrategy, we use A as right side, B as left side, which makes no improvement while adding a reverse DoFn -- 陈竞，中科院计算技术研究所，高性能计算机中心 Jing Chen HPCC.ICT.AC China
