- support for
REFRESHfor a single table
- Hints for specifying particular join strategies
- Dynamic resource management, allowing high concurrency for Impala queries
Question: if I remember correctly Impala uses a single process on each machine to execute queries.
- is it multi-threaded?
- does it do any memory/CPU management so one query is not completely exhausting any of these resources?
- what happens with the queries executing when this process fails?
Original title and link: Cloudera Impala 1.0 Release Notes and A Couple of Questions ( ©myNoSQL)