Book Image

NoSQL Data Models

By : Olivier Pivert
Book Image

NoSQL Data Models

By: Olivier Pivert

Overview of this book

Big Data environments are now to be handled in most current applications, this book addresses the latest issues and hurdles that are encountered in such environments. The book begins by presenting an overview of NoSQL languages and systems. Then, you’ll evaluate SPARQL queries over large RDF datasets and devise a solution that will use the MapReduce framework to process SPARQL graph patterns. Next, you’ll handle the production of web data, generate a set of links between two different datasets and overcome different heterogeneity problems. Moving ahead, you’ll take the multi-graph based approach to overcome challenges faced by the RDF data management community. Finally, you’ll deal with the flexible querying of graph databases and textual data management. By the end of this book, you’ll have gathered essential information on big data challenges faced by NoSQL databases.

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NoSQL Data Models
Olivier Pivert
Aug, 2018 | 278 pages
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Table of Contents (11 chapters)
Preface
Preface
Free Chapter
1
1 NoSQL Languages and Systems
1.1. Introduction
1.2. Join implementations on top of MapReduce
1.3. Models for NoSQL languages and systems
1.4. New challenges for database research
1.5. Bibliography
2
2 Distributed SPARQL Query Processing: a Case Study with Apache Spark
2.1. Introduction
2.2. RDF and SPARQL
2.3. SPARQL query processing
2.4. SPARQL and MapReduce
2.5. SPARQL on Apache Spark
2.6. Bibliography
3
3 Doing Web Data: from Dataset Recommendation to Data Linking
3.1. Introduction
3.2. Datasets recommendation for data linking
3.3. Challenges of linking data
3.4. Techniques applied to the data linking process
3.5. Conclusion
3.6. Bibliography
4
4 Big Data Integration in Cloud Environments: Requirements, Solutions and Challenges
4.1. Introduction
4.2. Big Data integration requirements in Cloud environments
4.3. Automatic data store selection and discovery
4.4. Unique access for all data stores
4.5. Unified data model and query languages
4.6. Query processing and optimization
4.7. Summary and open issues
4.8. Conclusion
4.9. Bibliography
5
5 Querying RDF Data: a Multigraph-based Approach
5.1. Introduction
5.2. Related work
5.3. Background and preliminaries
5.4. AMBER: a SPARQL querying engine
5.5. Index construction
5.6. Query matching procedure
5.7. Experimental analysis
5.8. Conclusion
5.9. Acknowledgment
5.10. Bibliography
6
6 Fuzzy Preference Queries to NoSQL Graph Databases
6.1. Introduction
6.2. Preliminary statements
6.3. Fuzzy preference queries over graph databases
6.4. Implementation challenges
6.5. Related work
6.6. Conclusion and perspectives
6.7. Acknowledgment
6.8. Bibliography
7
7 Relevant Filtering in a Distributed Content-based Publish/Subscribe System
7.1. Introduction
7.2. Related work: novelty and diversity filtering
7.3. A Publish/Subscribe data model
7.4. Publish/Subscribe relevance
7.5. Real-time integration of novelty and diversity
7.6. TDV updates
7.7. Experiments
7.8. Conclusion
7.9. Bibliography
8
List of Authors
List of Authors
9
Index
Index
10
End User License Agreement
End User License Agreement

7.3. A Publish/Subscribe data model

Our Pub/Sub data model relies on the fact that published items are mainly text oriented. Hence, subscriptions are long lasting (continuous) queries under the form of keyword-based subscriptions. Whenever a news item is published, it gets evaluated against the set of subscriptions submitted to the system and, for every matching subscription, the corresponding subscriber is notified.

7.3.1. Data model

The set of stored subscriptions is denoted by S and their total number by |S|. Each subscription s ∈ S includes a set of distinct terms from a vocabulary VS = {t1, …, tn} . I = [I1, …Im] denotes the feed of incoming items. Items I ∈ I are also formed by a set of terms (I ⊆ VI, with VI the vocabulary of items). In this context, a match occurs if and only if all of the terms of a subscription s are also present in a news item I (i.e. broad match semantics).

Table 7.1. Example of keyword based subscriptions

Subscription...
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