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Last updated : Nov 10, 2015
不在本期内容中
这一条目不在当前版本的技术雷达中。如果它出现在最近几期中,那么它很有可能仍然具有相关参考价值。如果这一条目出现在更早的雷达中,那么它很有可能已经不再具有相关性,我们的评估将不再适用于当下。很遗憾我们没有足够的带宽来持续评估以往的雷达内容。 了解更多
Nov 2015
评估 ? 在了解它将对你的企业产生什么影响的前提下值得探索

Apache Kylin is an open source analytics solution from eBay Inc. that enables SQL based multidimensional analysis (OLAP) on very large datasets. Kylin is intended to be a Hadoop based hybrid OLAP (HOLAP) solution that will eventually support both MOLAP and ROLAP style multidimensional analysis. With Kylin you can define cubes using a Cube Designer and initiate an offline process that builds these cubes. The offline process performs a pre-join step to join facts and dimension tables into a flattened out structure. This is followed by a pre-aggregation phase where individual cuboids are built using Map Reduce jobs. The results are stored in HDFS sequence files and are later loaded into HBase. The data requests can originate from SQL submitted using a SQL-based tool. The query engine (based on Apache Calcite), determines if the target dataset exists in HBase. If so, the engine directly accesses the target data from HBase and returns the result with sub-second latency. If not, the engine routes the queries to Hive (or any other SQL on Hadoop solution enabled on the cluster).

May 2015
评估 ? 在了解它将对你的企业产生什么影响的前提下值得探索
已发布 : May 05, 2015
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