Apache Impala is the open-source SQL query engine designed to work in the Hadoop ecosystem. It was developed by Marcel Kornacker while working at Cloudera. Impala provides users with a low-latency and high-concurrency SQL query environment that is able to interact with data stored in HDFS.  

Project Background

• Platform: Apache Impala
• Author: Cloudera
• Released: April 2013
• Type: Relational Hadoop-analytics
• License: Apache License 2.0
• Language: C++, ‎Java
• GitHub: apache/impala
• Runs on: Cross-platform
• GitHub Stars: 770
• GitHub Contributors: 165

Applications

• Manage multiple data pipelines
• Extendable Model
• Alerting system via mail or slack
• Simple interface log for each task
• Pipelines are defined in Python
• Uses DAGs for setting and managing various workflows
• Top-notch security
• Parallel processing database technology
• Works with Kerberos and LDAP