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Large Scale and Big Data
book

Large Scale and Big Data

by Sherif Sakr, Mohamed Gaber
June 2014
Intermediate to advanced content levelIntermediate to advanced
636 pages
23h 13m
English
Auerbach Publications
Content preview from Large Scale and Big Data
112 Large Scale and Big Data
KVs). Then, a series of MapReduce jobs update the state KVs based on the
structure KVs.
Use of State/Structure KVs. In each iteration, a mapper operating on a
structure KV produces intermediate KVs based the state KVs, and a reducer
updates a state KV. For example, in PageRank, the mapper operating on
each node needs a node’s PageRank score (state KV) and its outgoing neighbors
(structure KV), and the reducer updates a node’s PageRank score (state KV);
In K-means, the mapper operating on each point needs the coordinates of all
centroids (state KVs) and its own coordinate (structure KV), and the reducer
updates a centroid’s coordinate (state KV); In MPI, the mapper 2 operating on
each column of M needs the jth ...
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Publisher Resources

ISBN: 9781466581500