spark hive 数据倾斜

hive：

https://www.cnblogs.com/yanshw/p/12058160.html

https://www.cnblogs.com/qingyunzong/p/8847597.html

spark：

https://www.cnblogs.com/yanshw/p/12058160.html

https://blog.csdn.net/kaede1209/article/details/81145560