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As the most active project in the Hadoop ecosystem these days (Zaharia, 2014), Spark is a fast and general purpose engine for large-scale data processing. Thanks to its advanced Directed Acyclic Graph (DAG) execution engine and in-memory computing mechanism, Spark runs programs up to 100x faster than Hadoop MapReduce in memory, or 10x faster on disk (Apache, 2016). However, Spark performance is impacted...
Vega software is widely used for infrared simulation. This study proposes a method for evaluating the effect of infrared objective stealth based on Vega software combined with image feature point matching technique. Vega software is used to simulate a group of infrared images before and after target stealth. Afterwards, feature points are acquired from the target images. Hausdorff distance between...
Hadoop YARN is evolving to become the de-facto standard that allows multiple data processing engines such as interactive SQL, real-time streaming, data science and batch processing to handle data stored in a single platform. And, there are lots of researches about efficiently managing cluster resources and scheduling parallel jobs over YARN clusters. However, the scheduling of sub-tasks derived from...
In the era of big data, Hive has quickly gained popularity for its superior capability to manage and analyze very large datasets, both structured and unstructured, residing in distributed storage systems. However, great opportunity comes with great challenges: Hive query performance is impacted by many factors which makes capacity planning and tuning for Hive cluster extremely difficult. These factors...
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