Selecting indices properly is a fundamental aspect of system design optimization, but it is often a complex task. Index-selection optimization techniques have ...
We propose an approach to integrate the index into the MapReduce execution in which only an appropriate number of Maps are generated, each of which accesses the ...
The main contribution is the utilization of data mining techniques to develop a tool for determining optimal index-set configurations. An overall evaluation ...
Index selection optimization has been widely studied in DataBase Management Systems (DBMSs). However, current DBMS are not appropriate platforms for many data ...
A mapreduce relational-database index-selection tool that automates the very labor-intensive and therefore time-heavy and expensive process of manually ...
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Oct 15, 2011 · So a NOSQL database could very well be relational and could support joins. Secondly, joins don't limit scalability. A join in relational terms ...
Selection, Group By, Join. Let's look at how to implement a selection (from relational algebra) using MapReduce. If we want to perform a query like σ A = 123 ( ...
Nov 1, 2020 · The goal of this article is to explain how the relational operations are implemented using MapReduce jobs and visualize it for each operation using an example.
It is defined as detecting running tasks on weak nodes. Considering two stages in the Map phase (copy, combine) and three stages of Reduce (shuffle, sort and ...