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Is Hive An Impala Requirement? |
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Answer» The Hive metastore SERVICE is a requirement. Impala shares the same metastore database as Hive, ALLOWING Impala and Hive to access the same tables transparently. Hive itself is optional, and does not need to be installed on the same NODES as Impala. Currently, Impala supports a wider variety of read (query) OPERATIONS than write (INSERT) operations; you use Hive to insert data into tables that use certain file formats. The Hive metastore service is a requirement. Impala shares the same metastore database as Hive, allowing Impala and Hive to access the same tables transparently. Hive itself is optional, and does not need to be installed on the same nodes as Impala. Currently, Impala supports a wider variety of read (query) operations than write (insert) operations; you use Hive to insert data into tables that use certain file formats. |
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