Faster output-sensitive skyline computation algorithm
نویسندگان
چکیده
a r t i c l e i n f o a b s t r a c t We present the second output-sensitive skyline computation algorithm which is faster than the only existing output-sensitive skyline computation algorithm [1] in worst case because our algorithm does not rely on the existence of a linear time procedure for finding medians.
منابع مشابه
Dissertation Defense Efficient and Adaptive Skyline Computation
Abstract: Skyline, also known as Maxima in computational geometry or Pareto in business management field, is important for many applications involving multi-criteria decision making. The skyline of a set of multi-dimensional data points consists of the points for which no other point exists that is better in at least one dimension and at least as good in every other dimension. Although skyline ...
متن کاملSkyline Computation with Noisy Comparisons
Given a set of n points in a d-dimensional space, we seek to compute the skyline, i.e., those points that are not strictly dominated by any other point, using few comparisons between elements. We study the crowdsourcing-inspired setting ([FRPU94]) where comparisons fail with constant probability. In this model, Groz & Milo [GM15] show three bounds on the query complexity for the skyline problem...
متن کاملWork-Efficient Parallel Skyline Computation for the GPU
The skyline operator returns records in a dataset that provide optimal trade-offs of multiple dimensions. State-of-theart skyline computation involves complex tree traversals, data-ordering, and conditional branching to minimize the number of point-to-point comparisons. Meanwhile, GPGPU computing offers the potential for parallelizing skyline computation across thousands of cores. However, atte...
متن کاملEfficient Skyline Computation for Large Volume Data in MapReduce Utilising Multiple Reducers
A skyline query is useful for extracting a complete set of interesting tuples from a large data set according to multiple criteria. The sizes of data sets are constantly increasing and the architecture of backends are switching from single node environments to cluster oriented setups. Previous work has presented ways to run the skyline query in these setups using the MapReduce framework, but th...
متن کاملSkyline Evaluation Within Join Operation, Block Nested Loop Join Implementation
Skyline Join approach in its Naïve age work as it computes join first and then apply skyline computation to find corresponding skyline objects. Considering increase in cardinality and dimensionality of join table the cost of computing skyline in a non-reductive join relation is costlier than that of on single table. Most of the existing work on skyline queries for databases mainly discusses the...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Inf. Process. Lett.
دوره 114 شماره
صفحات -
تاریخ انتشار 2014