Optimally Leveraging Density and Locality for Exploratory Browsing and Sampling
Optimally Leveraging Density and Locality for Exploratory Browsing and Sampling
复制标题
最佳地利用密度和位置进行探索性浏览和采样
DOI:
10.1145/3209900.3209903
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Parameswaran, Aditya
中科院分区:
文献类型:
--
作者:
Kim, Albert;Xu, Liqi;Siddiqui, Tarique;Huang, Silu;Madden, Samuel;Parameswaran, Aditya
Exploratory data analysis often involves repeatedly browsing a small sample of records that satisfy certain predicates. We propose a fast query evaluation engine, called NeedleTail, aimed at letting analysts browse a subset of the query result on large datasets as quickly as possible, independent of the overall size of the result. NeedleTail introduces DensityMaps, a lightweight in-memory indexing structure, and a set of efficient and theoretically sound algorithms to quickly locate promising blocks, trading off locality and density. In settings where the samples are used to compute aggregates, we extend techniques from survey sampling to mitigate the bias in our samples. Our experimental results demonstrate that NeedleTail returns results 7× faster on average on HDDs while occupying up to 23× less memory than existing techniques.
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DOI:
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发表时间:
2009
期刊:
International Conference on Extending Database Technology
影响因子:
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作者:
Ying Hu;S. Sundara;Jagannathan Srinivasan
通讯作者:
Jagannathan Srinivasan
DOI:
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发表时间:
2016
期刊:
影响因子:
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作者:
Albert Kim;Liqi Xu;Tarique Siddiqui;Silu Huang;S. Madden;Aditya G. Parameswaran
通讯作者:
Aditya G. Parameswaran
DOI:
10.1145/2213836.2213902
发表时间:
2012
期刊:
Proceedings of the 2012 ACM SIGMOD International Conference on Management of Data
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P. Hanrahan
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发表时间:
2015
期刊:
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作者:
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通讯作者:
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DOI:
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发表时间:
2009
期刊:
Encyclopedia of Database Systems
影响因子:
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作者:
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通讯作者:
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