5.3 Joining Use Case
This case is used for testing performance of foreign key join over big data, involving of integer, digital and string join as well as single-level and multilevel.
Use Case Number Description:
1.esProc, Impala and Hive degrade in turn. At top level of performances, esProc is nearly twice times higher than Impala, while 4-6 times than Hive.
2.Impala lacks sensitivity to computation amount. As you imagine, if the computing computation amount continues to increase, its performance will exceed that of esProc.
3.When the number of levels needed to be joined increases, the performances of both esProc and Impala have unapparent changes, but Hive’s performance will be reduced significantly.