from Hacker News

Kylin: OLAP engine for Hadoop from eBay

by hsshah on 10/8/14, 9:46 PM with 9 comments

• by akbar501 on 10/8/14, 11:35 PM

  The integration with existing BI tools is a big deal. This eliminates the need to export a subset of data into a relational DB for OLAP.

  Incremental refresh of cubes is super important especially when working with large data sets.

  The ACL support and LDAP integration looks nice. Proper access control on top of BI data is an absolute requirement.

  I don't see anywhere this is listed explicitly, but I would guess this works with data in HBASE not individual files stored in HDFS.

• by dsaha on 10/8/14, 11:52 PM

  HDFS is used to store intermediate files for building cubes.

  HBase is used to store data cube and execute the query. HBase co-processor is also used for query processing.

• by fsaintjacques on 10/8/14, 10:33 PM

  I can't seem to find the documentation.

• by supergirl on 10/8/14, 10:52 PM

  what could this mean "extremely large petabytes of data analysis." ?