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2016In this work, we present and examine ways for a more efficient run of theta joins in a Spark system which extends the MapReduce programming model. Specifically, we focus on the optimization of the percentage of the communication cost, which occurs by performing theta joins in a Spark system and on the efficiency of the workload, which is affected by ...
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Proceedings of the 2007 ACM SIGMOD international conference on Management of data, 2007
With the increasing amount of text data stored in relational databases, there is a demand for RDBMS to support keyword queries over text data. As a search result is often assembled from multiple relational tables, traditional IR-style ranking and query evaluation methods cannot be applied directly.
Yi Luo +3 more
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With the increasing amount of text data stored in relational databases, there is a demand for RDBMS to support keyword queries over text data. As a search result is often assembled from multiple relational tables, traditional IR-style ranking and query evaluation methods cannot be applied directly.
Yi Luo +3 more
openaire +1 more source
What fuel properties enable higher thermal efficiency in spark-ignited engines?
Progress in Energy and Combustion Science, 2021James P Szybist +2 more
exaly