What is Impala?
Apache Impala is an open source massively parallel processing SQL query engine for data stored in a computer cluster running Apache Hadoop.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: What is Impala?
### Input: 
### Response: Apache Impala is an open source massively parallel processing SQL query engine for data stored in a computer cluster running Apache Hadoop.