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By Esen Sagynov
Published: Jul 10 2013 / 13:07

In this article the Software Engineer at NHN introduces a reader to Cloudera Impala, an open source system which provides real-time SQL querying functionality on top of Hadoop. The author quickly goes over when and how Impala was created, then explains in more details about Impala's architecture, its advantages and drawbacks, compares it to Pig and Hive. He also guides the reader through installation, configuration processes and shows how to run Impala. At the end of the article the author shows the performance test results he has obtained when comparing Impala with Hive, Infobright, infiniDB, and Vertica.
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