Compare hive, hbase, and impala?

42

Describe impala shell (impala-shell command)?

42

Does impala use caching?

44

How to control access to data in impala?

47

State some disadvantages of impala?

29

Is it possible to share data files between different components?

36

Can impala do user-defined functions (udfs)?

37

What size is recommended for each node?

214

Can I use impala to query data already loaded into hive and hbase?

47

When does impala hold on to or return memory?

87

Does if offer scaling?

31

Why do I have to use refresh and invalidate metadata, what do they do?

60

What are the best features of impala?

40

Why does my select statement fail?

41

Are results returned as they become available, or all at once when a query completes?

60