5.4 Use
Case for dimension Table across Nodes
This
case is used for testing performance of foreign key join over big data. The
dimension table in this case is big enough to exceed the memory size. At this
time, it will be segmented to be loaded into several sub-nodes.
Use
Case Number Description:
Tested Results :
Data Features:
1. esProc,
Impala and Hive degrade in turn, and esProc shows an evident advantage.
2. Data
type also produces a very minimal impact on the performances of three test
objects.
5.5 Use
Case for Big Group
This
case is used for testing performance of big data grouping, and the number of
grouped result goes far beyond the physical memory that the computation can’t
be done within memory.
Tested Results
Data Features:
1. As
we can see, the change has taken place in the rank. esProc, Hive, Impala
degrade in turn, esProc still significantly takes the lead, and Impala present
a worst performance.
2. The
performance of Impala will decrease sharply when there is a huge mass of the
data.
3. Data
type also produces a very minimal impact on the performances of three test
objects.
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