The terms Cloudera Impala and Apache Impala are frequently confused.
Cloudera Inc. is the initial designer/developer of Impala. It was, however, donated to Apache in 2015. As a result, they’re simply various titles for the same project.
Impala is open source and free to use under the Apache license. Impala offers in-memory data processing, which means it can access/analyze data stored on Hadoop data nodes without having to move the data around. Impala supports SQL-like queries for data access.
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Big Data and SQL 
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