Un-Answered Questions { Apache Impala }
How does impala compare to hive and pig?
How does impala achieve its performance improvements?
Can I use impala to query data already loaded into hive and hbase?
What happens when the data set exceeds available memory?
How much memory is required?
Are results returned as they become available, or all at once when a query completes?
Why do I have to use refresh and invalidate metadata, what do they do?
Why does my select statement fail?
Does impala performance improve as it is deployed to more hosts in a cluster in much the same way that hadoop performance does?
Can I do transforms or add new functionality?
Why is space not freed up when I issue drop table?
Is avro supported?
