Database Reference
In-Depth Information
formation on the physical location of the blocks about data files in HDFS, which helps
data access in case of node failure.
Working with HBase
HBase is a distributed, scalable, big data storage system that provides random, real-
time read and write access to data stored on HDFS. HBase, a database storage sys-
tem, sits on top of HDFS; however, like other traditional database storage systems,
HBase does not provide built-in SQL support. Third-party applications can provide
such functionality.
To use HBase, first the user defines tables in Impala and then maps them to the
equivalent HBase tables. Once a table relationship is established, users can submit
queries into the HBase table through Impala. Join operations can also be formed in-
cluding HBase and Impala tables.
Note
To learn more about using HBase with Impala, please visit the Cloudera website
at the following link, for extensive documentation:
http://www.cloudera.com/content/cloudera-content/cloudera-docs/Impala/latest/
Installing-and-Using-Impala/ciiu_impala_hbase.html
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